As filed with the Securities and Exchange Commission on January 29, 2024

Registration No. 333-   

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Aileron Therapeutics, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Lung Therapeutics, Inc. 2013 Long-Term Incentive Plan

(Full Title of the Plan)

Manuel C. Alves-Aivado

Chief Executive Officer

738 Main Street #398

Waltham, MA 02451

(Name and Address of Agent For Service)

(617) 995-0900

(Telephone Number, Including Area Code, of Agent For Service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

Explanatory Note

Pursuant to the Agreement and Plan of Merger, dated October 31, 2023 (the “Merger Agreement”), by and among Aileron Therapeutics, Inc., a Delaware corporation (the “Registrant”), AT Merger Sub I, Inc., a Delaware corporation and wholly owned subsidiary of the Registrant (“First Merger Sub”), AT Merger Sub II, LLC, a Delaware limited liability company and wholly owned subsidiary of the Registrant (“Second Merger Sub”), and Lung Therapeutics, Inc., a Texas corporation (“Lung”), First Merger Sub merged with and into Lung, pursuant to which Lung was the surviving entity and became a wholly owned subsidiary of the Registrant (the “First Merger”). Immediately following the First Merger, Lung merged with and into Second Merger Sub, pursuant to which Second Merger Sub was the surviving entity (together with the First Merger, the “Merger”). As a result of the Merger, Lung (through its successor Second Merger Sub) became a wholly owned subsidiary of the Registrant. In accordance with the Merger Agreement, the Registrant assumed certain stock options that were immediately outstanding prior to the First Merger under the Lung Therapeutics, Inc. 2013 Long-Term Incentive Plan, as amended (the “Plan”). Each option to purchase shares of Lung’s common stock granted under the Plan, whether vested or unvested, that was outstanding immediately prior to the effective time of the First Merger, was assumed and converted, at the effective time of the First Merger, into an option to purchase shares of the Registrant’s common stock, par value $0.001 per share (“Common Stock”) (as adjusted by the exchange ratio pursuant to the Merger Agreement).

The Registrant is filing this Registration Statement on Form S-8 (this “Registration Statement”) to register 1,775,909 shares of the Registrant’s Common Stock issuable upon the exercise of outstanding options originally granted under the Plan and assumed and converted by the Registrant.

PART I

INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Item 1. Plan Information.

The information required by Item 1 is omitted from this Registration Statement and included in documents sent or given to participants in the plan covered by this Registration Statement pursuant to Rule 428(b)(1) of the Securities Act of 1933, as amended (the “Securities Act”) and the Notice to Part I of Form S-8.

Item 2. Registrant Information and Employee Plan Annual Information.

The written statement required by Item 2 is omitted from this Registration Statement and included in documents sent or given to participants in the plan covered by this Registration Statement pursuant to Rule 428(b)(1) of the Securities Act and the Note to Part I of Form 8-K.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference

The Registrant is subject to the informational and reporting requirements of Sections 13(a), 14, and 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and in accordance therewith files reports, proxy statements and other information with the Securities and Exchange Commission (the “Commission”). The following documents, which are on file with the Commission, are incorporated in this Registration Statement by reference:

All documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of the filing of such documents. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for the purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

Item 4. Description of Securities

Not applicable.

Item 5. Interests of Named Experts and Counsel

Not applicable.

Item 6. Indemnification of Directors and Officers

Section 102 of the Delaware General Corporation Law (the “DGCL”) permits a corporation to eliminate the personal liability of its directors or officers for monetary damages for a breach of fiduciary duty as a director or officer, except (1) where the director or officer breached his or her duty of loyalty, failed to act in good faith, engaged in intentional misconduct, knowingly violated a law or obtained an improper personal benefit, (2) where any director authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law, or (3) for any officer, in any action by or in the right of the corporation. The Registrant’s certificate of incorporation provides that none of its directors shall be personally liable to it or its stockholders for monetary damages for any breach of fiduciary duty as a director, notwithstanding any provision of law imposing such liability, except to the extent that the DGCL prohibits the elimination or limitation of liability of directors for breaches of fiduciary duty.

Section 145 of the DGCL provides that a corporation has the power to indemnify a director, officer, employee, or agent of the corporation and certain other persons serving at the request of the corporation in related capacities against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlements actually and reasonably incurred by the person in connection with an action, suit or proceeding to which he or she is or is threatened to be made a party by reason of such position, if such person acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, in any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful, except that, in the case of actions brought by or in the right of the corporation, no indemnification shall be made with respect to any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or other adjudicating court determines that, despite the adjudication of liability but in view of all of the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper.

The Registrant’s certificate of incorporation provides that it will indemnify each person who was or is a party or is threatened to be made a party or is involved in any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the Registrant) by reason of the fact that he or she is or was, or has agreed to become, a director or officer of the Registrant, or is or was serving, or has agreed to serve, at the Registrant’s request as a director, officer, partner, employee or trustee of, or in a similar capacity with, another corporation, partnership, joint venture, trust or other enterprise (all such persons being referred to as an “Indemnitee”), or by reason of any action alleged to have been taken or omitted in such capacity, against all expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred in connection with such action, suit or proceeding and any appeal therefrom, if such Indemnitee acted in good faith and in a manner he or she reasonably believed to be in, or not opposed to, the Registrant’s best interests, and, with respect to any criminal action or proceeding, he or she had no reasonable cause to believe his or her conduct was unlawful. The Registrant’s certificate of incorporation also provides that the it will indemnify any Indemnitee who was or is a party to an action or suit by or in the right of the Registrant to procure a judgment in its favor by reason of the fact that the Indemnitee is or was, or has agreed to become, the Registrant’s director or officer, or is or was serving, or has agreed to serve, at the Registrant’s request as a director, officer, partner, employee or trustee of, or in a similar capacity with, another corporation, partnership, joint venture, trust or other enterprise, or by reason of any action alleged to have been taken or omitted in such capacity, against all expenses (including attorneys’ fees) and, to the extent permitted by law, amounts paid in settlement actually and reasonably incurred in connection with such action, suit or proceeding, and any appeal therefrom, if the Indemnitee acted in good faith and in a manner he or she reasonably believed to be in, or not opposed to, the Registrant’s best interests, except that no indemnification shall be made with respect to any claim, issue or matter as to which such person shall have been adjudged to be liable to the Registrant, unless a court determines that, despite such adjudication but in view of all of the circumstances, he or she is entitled to indemnification of such expenses. Notwithstanding the foregoing, to the extent that any Indemnitee has been successful, on the merits or otherwise, he or she will be indemnified by the Registrant against all expenses (including attorneys’ fees) actually and reasonably incurred by him or her or on his or her behalf in connection therewith. If the Registrant does not assume the defense, expenses must be advanced to an Indemnitee under certain circumstances.

The Registrant’s board of directors has approved a form of indemnification agreement that has been executed by each of its directors and executive officers. In general, these agreements provide that the Registrant will indemnify the director or executive officer to the fullest extent permitted by law for claims arising in his or her capacity as a director or executive officer of the Registrant or in connection with their service at the Registrant’s request for another corporation or entity. The indemnification agreements also provide for procedures that will apply in the event that a director or executive officer makes a claim for indemnification and establish certain presumptions that are favorable to the director or executive officer.

The Registrant maintains a general liability insurance policy that covers certain liabilities of its directors and officers arising out of claims based on acts or omissions in their capacities as directors or officers.

Item 7. Exemption from Registration Claimed

Not applicable.

Item 8. Exhibits

The following exhibits are incorporated herein by reference:

Item 9. Undertakings

1. The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

provided, however, that paragraphs (1)(i) and (ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

2. The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

3. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Waltham, Commonwealth of Massachusetts, on this 29th day of January, 2024.

POWER OF ATTORNEY AND SIGNATURES

We, the undersigned officers and directors of Aileron Therapeutics, Inc. hereby severally constitute and appoint Manuel C. Alves-Aivado, M.D., Ph.D., Susan L. Drexler, Brian Windsor, Ph.D., and Charles T. Garner, and each of them singly, our true and lawful attorneys with full power to them, and each of them singly, to sign for us and in our names in the capacities indicated below, the registration statement on Form S-8 filed herewith and any and all subsequent amendments to said registration statement, and generally to do all such things in our names and on our behalf in our capacities as officers and directors to enable Aileron Therapeutics, Inc. to comply with the provisions of the Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said registration statement and any and all amendments thereto.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

Exhibit 5.1

+1 617 526 6000 (t)

+1 617 526 5000 (f)

January 29, 2024

Aileron Therapeutics, Inc.

738 Main Street #398

Waltham, MA 02451

Ladies and Gentlemen:

We have assisted in the preparation of a Registration Statement on Form S-8 (the “Registration Statement”) to be filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”), relating to an aggregate of 1,775,909 shares of common stock, $0.001 par value per share (the “Shares”), of Aileron Therapeutics, Inc., a Delaware corporation (the “Company”), issuable upon exercise of the outstanding options granted under the Lung Therapeutics, Inc. 2013 Long-Term Incentive Plan, as amended (the “Plan”). The options issued and the shares issuable upon exercise thereof under the Plan were assumed by the Company in connection with and pursuant to the terms of that certain Agreement and Plan of Merger, dated October 31, 2023, by and among the Company, AT Merger Sub I, Inc., a Delaware corporation and wholly owned subsidiary of the Company, AT Merger Sub II, LLC, a Delaware limited liability company and wholly owned subsidiary of the Company, and Lung Therapeutics, Inc., a Texas corporation.

We have examined the Certificate of Incorporation and By-Laws of the Company, each as amended and restated to date, and originals, or copies certified to our satisfaction, of all pertinent records of the meetings of the board of directors and stockholders of the Company, the Registration Statement, the Plan and such other documents relating to the Company as we have deemed material for the purposes of this opinion.

In our examination of the foregoing documents, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as certified, photostatic or other copies, the authenticity of the originals of any such documents and the legal competence of all signatories to such documents.

We assume that the appropriate action will be taken, prior to the offer and sale of the Shares in accordance with the Plan, to register and qualify the Shares for sale under all applicable state securities or “blue sky” laws.

We express no opinion herein as to the laws of any state or jurisdiction other than the General Corporation Law of the State of Delaware.

It is understood that this opinion is to be used only in connection with the offer and sale of the Shares while the Registration Statement is in effect.

Please note that we are opining only as to the matters expressly set forth herein, and no opinion should be inferred as to any other matters.

Based on the foregoing, we are of the opinion that the Shares have been duly authorized for issuance and, when the Shares are issued and paid for in accordance with the terms and conditions of the Plan, the Shares will be validly issued, fully paid and nonassessable.

We hereby consent to the filing of this opinion with the Commission in connection with the Registration Statement in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act. In giving such consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission.

Exhibit 23.2

CONSENT OF INDEPENDENT AUDITOR

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated May 25, 2023 relating to the financial statements of Lung Therapeutics, Inc., appearing in the Current Report on Form 8-K/A of Aileron Therapeutics, Inc. filed on January 11, 2024.

/s/ Deloitte & Touche LLP

Morristown, NJ

January 29, 2024

Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Aileron Therapeutics, Inc. of our report dated March 20, 2023 relating to the financial statements, which appears in Aileron Therapeutics, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2022.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

January 29, 2024

Exhibit 99.1

LUNG THERAPEUTICS, INC.

2013 LONG-TERM INCENTIVE PLAN

The Lung Therapeutics, Inc. 2013 Long-Term Incentive Plan (the “Plan”) was adopted by the Board of Directors of Lung Therapeutics, Inc., a Texas corporation (the “Company”), effective as of October 23, 2013, subject to approval by the Company’s shareholders.

ARTICLE 1

PURPOSE

The purpose of the Plan is to attract and retain the services of key employees, key consultants and Outside Directors of the Company and its Subsidiaries and to provide such persons with a proprietary interest in the Company through the granting of incentive stock options, nonqualified stock options, stock and restricted stock, that will

(a) increase the interest of such persons in the Company’s welfare;

(b) furnish an incentive to such persons to continue their services for the Company; and

(c) provide a means through which the Company may attract able persons as employees, Consultants and Outside Directors.

With respect to Reporting Participants, the Plan and all transactions under the Plan are intended to comply with all applicable conditions of Rule 16b-3 promulgated under the Securities Exchange Act of 1934 (the “1934 Act”). To the extent any provision of the Plan or action by the Committee fails to so comply, it shall be deemed null and void ab initio, to the extent permitted by law and deemed advisable by the Committee.

ARTICLE 2

DEFINITIONS

For the purpose of the Plan, unless the context requires otherwise, the following terms shall have the meanings indicated:

2.1 “Award” means the grant of any Incentive Stock Option, Nonqualified Stock Option, or Restricted Stock (each individually referred to herein as an “Incentive”).

2.2 “Award Agreement” means a written agreement between a Participant and the Company which sets out the terms of the grant of an Award.

2.3 “Award Period” means the period set forth in the Award Agreement during which one or more Incentives granted under an Award may be exercised.

2.4 “Board” means the board of directors of the Company.

2.5 “Change in Control” means any of the following, except as otherwise provided herein: (i) any consolidation, merger or share exchange of the Company in which the Company is not the continuing or surviving corporation or pursuant to which shares of the Company’s Common Stock would be converted into cash, securities or other property, other than a consolidation, merger or share exchange of the Company in a merger or consolidation in which the holders of the Company’s Common Stock immediately prior to such transaction have no less than fifty percent (50%) of the total combined voting power of the outstanding voting stock of the surviving corporation immediately after such transaction; (ii) any sale, lease, exchange or other transfer (excluding transfer by way of pledge or hypothecation) in one transaction or a series of related transactions, of all or substantially all of the assets of the Company; (iii) the shareholders of the Company approve any plan or proposal for the liquidation or dissolution of the Company; (iv) the cessation of control (by virtue of their not constituting a majority of directors) of the Board by the individuals (the “Continuing Directors”) who (x) at the date of this Plan were directors or (y) become directors after the date of this Plan and whose election or nomination for election by the Company’s shareholders was approved by a vote of at least two-thirds of the directors then in office who were directors at the date of this Plan or whose election or nomination for election was previously so approved; (v) the acquisition of beneficial ownership (within the meaning of Rule 13d-3 under the 1934 Act) of an aggregate of 50% or more of the voting power of the Company’s outstanding voting securities by any person or group (as such term is used in Rule 13d-5 under the 1934 Act) who beneficially owned less than 50% of the voting power of the Company’s outstanding voting securities on the date of this Plan; provided, however, that notwithstanding the foregoing, an acquisition shall not constitute a Change in Control hereunder if the acquirer is (x) a trustee or other fiduciary holding securities under an employee benefit plan of the Company and acting in such capacity, (y) a Subsidiary of the Company or a corporation owned, directly or indirectly, by the shareholders of the Company in substantially the same proportions as their ownership of voting securities of the Company or (z) any other person whose acquisition of shares of voting securities is approved in advance by a majority of the Continuing Directors; or (vi) in a Title 11 bankruptcy proceeding, the appointment of a trustee or the conversion of a case involving the Company to a case under Chapter 7.

Notwithstanding the foregoing provisions of this Section 2.5, in the event an Award issued under the Plan is subject to Section 409A of the Code, then, in lieu of the foregoing definition and to the extent necessary to comply with the requirements of Section 409A of the Code, the definition of “Change in Control” for purposes of such Award shall be the definition provided for under Section 409A of the Code and the regulations or other guidance issued thereunder.

2.6 “Code” means the Internal Revenue Code of 1986, as amended, and the regulations promulgated thereunder.

2.7 “Committee” means a committee of the Board designated by the Board to administer the Plan or, if no such committee is designated by the Board, the Board. At any time there is no Committee to administer the Plan, any references in this Plan to the Committee shall be deemed to refer to the Board.

2.8 “Common Stock” means the common stock, $0.001 par value per share, which the Company is currently authorized to issue or may in the future be authorized to issue, or any securities into which or for which the common stock of the Company may be converted or exchanged, as the case maybe, pursuant to the terms of this Plan.

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2.9 “Company” means Lung Therapeutics, Inc., a Texas corporation, and any successor entity.

2.10 “Consultant” means any person, who is not an Employee, performing advisory or consulting services for the Company or a Parent or Subsidiary, with or without compensation, provided that bona fide services must be rendered by such person and such services shall not be rendered in connection with the offer or sale of securities in a capital raising transaction.

2.11 “Corporation” means any entity that (i) is defined as a corporation under Section 7701 of the Code and (ii) is the Company or is in an unbroken chain of corporations (other than the Company) beginning with the Company, if each of the corporations other than the last corporation in the unbroken chain owns stock possessing a majority of the total combined voting power of all classes of stock in one of the other corporations in the chain. For purposes of clause (ii) hereof, an entity shall be treated as a “corporation” if it satisfies the definition of a corporation under Section 7701 of the Code.

2.12 “Date of Grant” means the effective date on which an Award is made to a Participant as set forth in the applicable Award Agreement; provided, however, that solely for purposes of Section 16 of the 1934 Act and the rules and regulations promulgated thereunder, the Date of Grant of an Award shall be the date of shareholder approval of the Plan if such date is later than the effective date of such Award as set forth in the Award Agreement.

2.13 “Employee” means common law employee (as defined in accordance with the Regulations and Revenue Rulings then applicable under Section 3401(c) of the Code) of the Company or any Parent or Subsidiary of the Company.

2.14 “Executive Officer” means an officer of the Company or a Subsidiary subject to Section 16 of the 1934 Act or a “covered employee” as defined in Section 162(m)(3) of the Code.

2.15 “Fair Market Value” means, as of a particular date,

(a) if the shares of Common Stock are not Publicly Traded, such amount as may be determined by the Committee in a manner consistent with Section 409A of the Code and Treasury Regulation Section 1.409A-1(b)(5)(iv)(B), and, in the case of an Incentive Stock Option, in accordance with Section 422 of the Code, or

(b) if the shares of Common Stock are Publicly Traded and (i) if the shares of Common Stock are listed on any established national securities exchange, the closing sales price per share of Common Stock on the consolidated transaction reporting system for the principal securities exchange for the Common Stock on that date, or, if there shall have been no such sale so reported on that date, on the last preceding date on which such a sale was so reported, (ii) if the shares of Common Stock are not so listed but are quoted on the Nasdaq National Market System, the closing sales price per share of Common Stock on

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the Nasdaq National Market System on that date, or, if there shall have been no such sale so reported on that date, on the last preceding date on which such a sale was so reported, or (iii) if the Common Stock is not so listed or quoted, the mean between the closing bid and asked price on that date, or, if there are no quotations available for such date, on the last preceding date on which such quotations shall be available, as reported by Nasdaq, or, if not reported by Nasdaq, on the Over-the-Counter Bulletin Board, as reported in the Wall Street Journal or such other source as the Committee deems reliable.

2.16 “Grant Price” means the price at which a Participant may exercise his or her right to receive cash or Common Stock, as applicable, under the terms of an Award.

2.17 “Incentive” is defined in Section 2.1 hereof.

2.18 “Incentive Stock Option” means an incentive stock option within the meaning of Section 422 of the Code, granted pursuant to this Plan.

2.19 “Nonqualified Stock Option” means a nonqualified stock option, granted pursuant to this Plan, which is not an Incentive Stock Option.

2.20 “Outside Director” means a director of the Company who is not an Employee or a Consultant.

2.21 “Parent” means any corporation, partnership or limited liability company that owns stock possessing a majority of the total combined voting power of all classes of stock in the Company.

2.22 “Participant” means an Employee, Consultant or Outside Director of the Company or a Parent or Subsidiary to whom an Award is granted under this Plan.

2.23 “Performance Goal” means any of the goals set forth in Section 6.10 hereof.

2.24 “Plan” means this Lung Therapeutics, Inc. 2013 Long-Tenn Incentive Plan, as amended from time to time.

2.25 “Publicly Traded” means that the Common Stock is registered under, and the Company is subject to the periodic reporting requirements of, Sections 12(g) or 15(d) of the 1934 Act.

2.26 “Reporting Participant” means a Participant who is subject to the reporting requirements of Section 16 of the 1934 Act.

2.27 “Restricted Stock” means shares of Common Stock issued or transferred to a Participant pursuant to Section 6.4 of this Plan that are subject to restrictions or limitations set forth in this Plan and in the related Award Agreement.

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2.28 “Retirement” means any Termination of Service solely due to retirement upon or after attainment of age sixty-five (65), or permitted early retirement as determined by the Committee.

2.29 “Shareholders Agreement” means that certain Shareholders Agreement, dated as of February 15, 2013, by and among the Company and certain shareholders of the Company.

2.30 “Stock Appreciation Right” or “SAR” means a right to receive a payment in cash or Common Stock (at the discretion of the Committee), equal to the excess of Fair Market Value of a specified number of shares of Common Stock on the date the right is exercised over the Fair Market Value of such shares on the Date of Grant.

2.31 “Stock Option” means a Nonqualified Stock Option or an Incentive Stock Option.

2.32 “Subsidiary” means (i) any corporation in an unbroken chain of corporations beginning with the Company, if each of the corporations other than the last corporation in the unbroken chain owns stock possessing a majority of the total combined voting power of all classes of stock in one of the other corporations in the chain, (ii) any limited partnership, if the Company or any corporation described in item (i) above owns a majority of the general partnership interest and a majority of the limited partnership interests entitled to vote on the removal and replacement of the general partner, and (iii) any partnership or limited liability company, if the partners or members thereof are composed only of the Company, any corporation listed in item (i) above or any limited partnership listed in item (ii) above. “Subsidiaries” means more than one of any such corporations, limited partnerships, partnerships or limited liability companies.

2.33 “Termination of Service” occurs when a Participant who is (i) an Employee of the Company or any Parent or Subsidiary ceases to serve as an Employee of any Parent and its Subsidiaries (including the Company), for any reason; (ii) an Outside Director of the Company or a Parent or Subsidiary ceases to serve as a director of any Parent and its Subsidiaries (including the Company) for any reason; or (iii) a Consultant of the Company or a Parent or Subsidiary ceases to serve as a Consultant of any Parent and its Subsidiaries (including the Company) for any reason. Except as may be necessary or desirable to comply with applicable federal or state law, a “Termination of Service” shall not be deemed to have occurred when a Participant who is an Employee becomes an Outside Director or Consultant or vice versa. Except as may be necessary or desirable to comply with applicable federal or state law, a “Termination of Service” shall not be deemed to have occurred until 180 days have passed after the service of a Participant who is an Employee is terminated by the Company or any Parent or Subsidiary without cause. If, however, a Participant who is an Employee and who has an Incentive Stock Option ceases to be an Employee but does not suffer a Termination of Service, and if that Participant does not exercise the Incentive Stock Option within the time required under Section 422 of the Code upon ceasing to be an Employee, the Incentive Stock Option shall thereafter become a Nonqualified Stock Option. Notwithstanding the foregoing provisions of this Section 2.33, in the event an Award issued under the Plan is subject to Section 409A of the Code, then, in lieu of the foregoing definition and to the extent necessary to comply with the requirements of Section 409A of the Code, the definition of “Termination of Service” for purposes of such Award shall be the definition of “separation from service” provided for under Section 409A of the Code and the regulations or other guidance issued thereunder.

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2.34 “Total and Permanent Disability” means a Participant is qualified for long-term disability benefits under the Company’s or Parent’s or Subsidiary’s disability plan or insurance policy; or, if no such plan or policy is then in existence or if the Participant is not eligible to participate in such plan or policy, that the Participant, because of a physical or mental condition resulting from bodily injury, disease, or mental disorder is unable to perform his or her duties of employment for a period of ninety (90) continuous days, as determined in good faith by the Committee, based upon medical reports or other evidence satisfactory to the Committee; provided that, with respect to any Incentive Stock Option, Total and Permanent Disability shall have the meaning given it under the rules governing Incentive Stock Options under the Code. Notwithstanding the foregoing provisions of this Section 2.34, in the event an Award issued under the Plan is subject to Section 409A of the Code, then, in lieu of the foregoing definition and to the extent necessary to comply with the requirements of Section 409A of the Code, the definition of “Total and Permanent Disability” for purposes of such Award shall be the definition of “disability” provided for under Section 409A of the Code and the regulations or other guidance issued thereunder.

ARTICLE 3

ADMINISTRATION

3.1 General Administration; Establishment of Committee. Subject to the terms of this Article 3, the Plan shall be administered by the Committee. The Committee shall consist of not fewer than two persons. Any member of the Committee may be removed at any time, with or without cause, by resolution of the Board. Any vacancy occurring in the membership of the Committee may be filled by appointment by the Board. At any time there is no Committee to administer the Plan, any references in this Plan to the Committee shall be deemed to refer to the Board.

Membership on the Committee, if designated by the Board, shall be limited to those members of the Board who are “outside directors” under Section 162(m) of the Code and “non-employee directors” as defined in Rule 16b-3 promulgated under the 1934 Act. The Committee shall select one of its members to act as its Chairman. A majority of the Committee shall constitute a quorum, and the act of a majority of the members of the Committee present at a meeting at which a quorum is present shall be the act of the Committee.

3.2 Designation of Participants and Awards.

(a) The Committee or the Board shall determine and designate from time to time the eligible persons to whom Awards will be granted and shall set forth in each related Award Agreement, where applicable, the Award Period, the Date of Grant, and such other terms, provisions, limitations, and performance requirements, as are approved by the Committee, but not inconsistent with the Plan. The Committee shall determine whether an Award shall include one type of Incentive or two or more Incentives granted in combination or two or more Incentives granted in tandem (that is, a joint grant where

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exercise of one Incentive results in cancellation of all or a portion of the other Incentive). Although the members of the Committee shall be eligible to receive Awards, all decisions with respect to any Award, and the terms and conditions thereof, to be granted under the Plan to any member of the Committee shall be made solely and exclusively by the other members of the Committee, or if such member is the only member of the Committee, by the Board.

(b) Notwithstanding Section 3.2(a), the Board may, in its discretion and by a resolution adopted by the Board, authorize one or more officers of the Company (an “Authorized Officer”) to (i) designate one or more Employees as eligible persons to whom Awards will be granted under the Plan and (ii) determine the number of shares of Common Stock that will be subject to such Awards; provided, however, that the resolution of the Board granting such authority shall (x) specify the total number of shares of Common Stock that may be made subject to the Awards, (y) set forth the price or prices (or a formula by which such price or prices may be determined) to be paid for the purchase of the Common Stock subject to such Awards, and (z) not authorize an officer to designate himself as a recipient of any Award.

3.3 Authority of the Committee. The Committee, in its discretion, shall (i) interpret the Plan, (ii) prescribe, amend, and rescind any rules and regulations necessary or appropriate for the administration of the Plan, (iii) establish performance goals for an Award and certify the extent of their achievement, and (iv) make such other determinations or certifications and take such other action as it deems necessary or advisable in the administration of the Plan. Any interpretation, determination, or other action made or taken by the Committee shall be final, binding, and conclusive on all interested parties. The Committee’s discretion set forth herein shall not be limited by any provision of the Plan, including any provision which by its tennis is applicable notwithstanding any other provision of the Plan to the contrary.

The Committee may delegate to officers of the Company, pursuant to a written delegation, the authority to perform specified functions under the Plan. Any actions taken by any officers of the Company pursuant to such written delegation of authority shall be deemed to have been taken by the Committee.

With respect to restrictions in the Plan that are based on the requirements of Rule 16b-3 promulgated under the 1934 Act, Section 422 of the Code, Section 162(m) of the Code, the rules of any exchange or interdealer quotation system upon which the Company’s securities are listed or quoted, or any other applicable law, rule or restriction (collectively, “applicable law”), to the extent that any such restrictions are no longer required by applicable law, the Committee shall have the sole discretion and authority to grant Awards that are not subject to such mandated restrictions and/or to waive any such mandated restrictions with respect to outstanding Awards.

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ARTICLE 4

ELIGIBILITY

Any Employee (including an Employee who is also a director or an officer), Consultant or Outside Director of the Company, a Parent or a Subsidiary whose judgment, initiative, and efforts contributed or may be expected to contribute to the successful performance of the Company is eligible to participate in the Plan; provided that only Employees of the Company or any Parent or Subsidiary may be eligible to receive Incentive Stock Options. The Committee, upon its own action, may grant, but will not be required to grant, an Award to any Employee, Consultant or Outside Director of the Company or any Parent or Subsidiary. Awards may be granted by the Committee at any time and from time to time to new Participants, or to then Participants, or to a greater or lesser number of Participants, and may include or exclude previous Participants, as the Committee shall determine. Except as required by this Plan, Awards granted at different times need not contain similar provisions. The Committee’s determinations under the Plan (including without limitation determinations of which Employees, Consultants or Outside Directors, if any, are to receive Awards, the form, amount and timing of such Awards, the terms and provisions of such Awards and the agreements evidencing same) need not be uniform and may be made by it selectively among Participants who receive, or are eligible to receive, Awards under the Plan.

ARTICLE 5

SHARES SUBJECT TO PLAN

5.1 Number Available for Awards. Subject to adjustment as provided in Articles 11 and 12, the maximum number of shares of Common Stock that may be delivered pursuant to Awards granted under the Plan is 1,500,000 shares, 100% of which may be delivered pursuant to Incentive Stock Options. Shares to be issued may be made available from authorized but unissued Common Stock, Common Stock held by the Company in its treasury, or Common Stock purchased by the Company on the open market or otherwise. During the term of this Plan, the Company will at all times reserve and keep available the number of shares of Common Stock that shall be sufficient to satisfy the requirements of this Plan.

5.2 Reuse of Shares. To the extent that any Award under this Plan may be forfeited, expires or canceled, in whole or in part, then the number of shares of Common Stock covered by the Award or Stock Option so forfeited, expired or canceled may again be awarded pursuant to the provisions of this Plan. In the event that previously acquired shares of Common Stock are delivered to the Company in full or partial payment of the exercise price for the exercise of a Stock Option granted under this Plan, the number of shares of Common Stock available for future Awards under this Plan shall be reduced only by the net number of shares of Common Stock issued upon the exercise of the Stock Option. Awards that may be satisfied either by the issuance of shares of Common Stock or by cash or other consideration shall be counted against the maximum number of shares of Common Stock that may be issued under this Plan only during the period that the Award is outstanding or to the extent the Award is ultimately satisfied by the issuance of shares of Common Stock. Notwithstanding any provisions of the Plan to the contrary, only shares forfeited back to the Company, shares canceled on account of termination, expiration or lapse of an Award, shares surrendered in payment of the exercise price of an option or shares withheld for payment of applicable employment taxes and/or withholding obligations resulting from the exercise of an option shall again be available for grant of Incentive Stock Options under the Plan, but shall not increase the maximum number of shares described in Section 5.1 above as the maximum number of shares of Common Stock that may be delivered pursuant to Incentive Stock Options.

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ARTICLE 6

GRANT OF AWARDS

6.1 In General.

(a) The grant of an Award shall be authorized by the Committee and shall be evidenced by an Award Agreement setting forth the Incentive or Incentives being granted, the total number of shares of Common Stock subject to the Incentive(s), the Grant Price (if applicable), the Award Period, the Date of Grant, and such other terms, provisions, limitations, and performance objectives, as are approved by the Committee, but (i) not inconsistent with the Plan and (ii) to the extent an Award issued under the Plan is subject to Section 409A of the Code, in compliance with the applicable requirements of Section 409A of the Code and the regulations or other guidance issued thereunder. The Company shall execute an Award Agreement with a Participant after the Committee approves the issuance of an Award. Any Award granted pursuant to this Plan must be granted within ten (10) years of the date of adoption of this Plan. The Plan must be submitted to the Company’s shareholders for approval; however, the Committee may grant Awards under the Plan prior to the time of shareholder approval. Any such Award granted prior to such shareholder approval will be made subject to such shareholder approval. The grant of an Award to a Participant shall not be deemed either to entitle the Participant to, or to disqualify the Participant from, receipt of any other Award under the Plan.

(b) If the Committee establishes a purchase price for an Award, the Participant must accept such Award within a period of thirty (30) days (or such shorter period as the Committee may specify) after the Date of Grant by executing the applicable Award Agreement and paying such purchase price.

(c) Except as otherwise provided herein, a Participant shall have no rights as a holder of any unissued securities covered by an Award until the date the Participant becomes the holder of record if such securities. Except as provided in Section 11 hereof, no adjustment or other provision shall be made for dividends or other rights with respect to such securities, except to the extent that the Award Agreement provides for dividend payments or dividend equivalent rights.

(d) An Award Agreement may not include provisions that “reload” the Award upon exercise.

(e) The Committee may specify in an Award Agreement at the time of Award that the Participant’s rights, payments and benefits with respect to an Award shall be subject to reduction, cancellation, forfeiture or recoupment upon the occurrence of certain specified events, in addition to any otherwise applicable vesting or performance conditions of an Award. Such events may include, but shall not be limited to, violation of material Company policies, breach of noncompetition, confidentiality or other restrictive covenants that may apply to the Participant, or other conduct by the Participant that is detrimental to the business or reputation of the Company.

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6.2 Grant Price. The Grant Price for any share of Common Stock that may be purchased under a Nonqualified Stock Option may be equal to or greater than the Fair Market Value of the share on the Date of Grant. The Grant Price for any share of Common Stock that may be purchased under an Incentive Stock Option must be at least equal to the Fair Market Value of the share on the Date of Grant; if an Incentive Stock Option is granted to an Employee who owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than ten percent (10%) of the combined voting power of all classes of stock of the Company (or any Parent or Subsidiary), the Grant Price must be at least 110% of the Fair Market Value of the Common Stock on the Date of Grant.

6.3 Maximum ISO Grants. The Committee may not grant Incentive Stock Options under the Plan to any Employee that would permit the aggregate Fair Market Value (determined on the Date of Grant) of the Common Stock with respect to which Incentive Stock Options (under this and any other plan of the Company and its Subsidiaries) are exercisable for the first time by such Employee during any calendar year to exceed $100,000. To the extent any Stock Option granted under this Plan that is designated as an Incentive Stock Option exceeds this limit or otherwise fails to qualify as an Incentive Stock Option, such Stock Option (or any such portion thereof) shall be a Nonqualified Stock Option. In such case, the Committee shall designate which stock will be treated as Incentive Stock Option stock by causing the issuance of a separate stock certificate and identifying such stock as Incentive Stock Option stock on the Company’s stock transfer records.

6.4 Restricted Stock. If Restricted Stock is granted to or received by a Participant under an Award (including a Stock Option), the Committee shall set forth in the related Award Agreement: (i) the number of shares of Common Stock awarded, (ii) the price, if any, to be paid by the Participant for such Restricted Stock and the method of payment of the price, (iii) the time or times within which such Award may be subject to forfeiture, (iv) specified Performance Goals of the Company, a Parent or Subsidiary, any division thereof or any group of Employees of the Company, or other criteria, that the Committee determines must be met in order to remove any restrictions (including vesting) on such Award, and (v) all other terms, limitations, restrictions, and conditions of the Restricted Stock, which shall be consistent with this Plan and to the extent a Restricted Stock granted under the Plan is subject to Section 409A of the Code, in compliance with the applicable requirements of Section 409A of the Code and the regulations or other guidance issued thereunder. The provisions of Restricted Stock need not be the same with respect to each Participant.

(a) Legend on Shares. Each Participant who is awarded or receives Restricted Stock will be issued a stock certificate or certificates in respect of such shares of Common Stock. Such certificate(s) shall be registered in the name of the Participant, and shall bear an appropriate legend referring to the terms, conditions, and restrictions applicable to such Restricted Stock, substantially as provided in Section 15.9 of the Plan.

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(b) Restrictions and Conditions. Shares of Restricted Stock shall be subject to the following restrictions and conditions:

(i) Subject to the other provisions of this Plan and the terms of the particular Award Agreements, during such period as may be determined by the Committee commencing on the Date of Grant or the date of exercise of an Award (the “Restriction Period”), the Participant shall not be permitted to sell, transfer, pledge or assign shares of Restricted Stock. Except for these limitations, the Committee may in its sole discretion, remove any or all of the restrictions on such Restricted Stock whenever it may determine that, by reason of changes in applicable laws or other changes in circumstances arising after the date of the Award, such action is appropriate.

(ii) Except as provided in sub-paragraph (i) above or in the applicable Award Agreement, the Participant will have, with respect to his or her Restricted Stock, all of the rights of a shareholder of the Company, including the right to vote the shares, and the right to receive any dividends thereon. Certificates for shares of Common Stock free of restriction under this Plan shall be delivered to the Participant promptly after, and only after, the Restriction Period shall expire without forfeiture in respect of such shares of Common Stock or after any other restrictions imposed in such shares of Common Stock by the applicable Award Agreement or other agreement have expired. Certificates for the shares of Common Stock forfeited under the provisions of the Plan and the applicable Award Agreement shall be promptly returned to the Company by the forfeiting Participant. Each Award Agreement shall require that each Participant, in connection with the issuance of a certificate for Restricted Stock, shall endorse such certificate in blank or execute a stock power in form satisfactory to the Company in blank and deliver such certificate and executed stock power to the Company.

(iii) The Restriction Period of Restricted Stock shall commence on the Date of Grant or the date of exercise of an Award, as specified in the Award Agreement, and, subject to Article 12 of the Plan, unless otherwise established by the Committee in the Award Agreement setting forth the terms of the Restricted Stock, shall expire upon satisfaction of the conditions set forth in the Award Agreement; such conditions may provide for vesting based on such Performance Goals, as may be determined by the Committee in its sole discretion.

(iv) Except as otherwise provided in the particular Award Agreement, upon Termination of Service for any reason during the Restriction Period, the nonvested shares of Restricted Stock shall be forfeited by the Participant. In the event a Participant has paid any consideration to the Company for such forfeited Restricted Stock, the Committee shall specify in the Award Agreement that either (i) the Company shall be obligated to, or (ii) the Company may, in its sole discretion, elect to, pay to the Participant, as soon as practicable after the event causing forfeiture, in cash, an amount equal to the lesser of the total consideration paid by the Participant for such forfeited shares or the Fair Market Value of such forfeited shares as of the date of Termination of Service, as the Committee, in its sole discretion shall select. Upon any forfeiture, all rights of a Participant with respect to the forfeited shares of the Restricted Stock shall cease and terminate, without any further obligation on the part of the Company.

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(c) Section 83(b) Election. If a Participant makes an election pursuant to Section 83(b) of the Code with respect to an Award of Restricted Stock, the Participant shall file, within 30 days following the Date of Grant, a copy of such election with the Company and with the Internal Revenue Service, in accordance with the regulations under Section 83(b) of the Code. The Committee may provide in an Award Agreement that the Award of Restricted Stock is conditioned upon the Participant’s making or refraining from making an election with respect to the Award under Section 83(b) of the Code.

6.5 Performance Goals. Awards of Restricted Stock under the Plan may be made subject to the attainment of Performance Goals relating to one or more business criteria that, when applicable, shall be within the meaning of Section 162(m) of the Code and consist of one or more or any combination of the following criteria: cash flow; cost; revenues; sales; ratio of debt to debt plus equity; net borrowing, credit quality or debt ratings; profit before tax; economic profit; earnings before interest and taxes; earnings before interest, taxes, depreciation and amortization; gross margin; earnings per share (whether on a pre-tax, after-tax, operational or other basis); operating earnings; capital expenditures; expenses or expense levels; economic value added; ratio of operating earnings to capital spending or any other operating ratios; free cash flow; net profit; net sales; net asset value per share; the accomplishment of mergers, acquisitions, dispositions, public offerings or similar extraordinary business transactions; sales growth; price of the Company’s Common Stock; return on assets, equity or shareholders’ equity; market share; inventory levels, inventory turn or shrinkage; or total return to shareholders (“Performance Criteria”). Any Performance Criteria may be used to measure the performance of the Company as a whole or any business unit of the Company and may be measured relative to a peer group or index. Any Performance Criteria may include or exclude (i) extraordinary, unusual and/or non-recurring items of gain or loss, (ii) gains or losses on the disposition of a business, (iii) changes in tax or accounting regulations or laws, or (iv) the effect of a merger or acquisition, as identified in the Company’s quarterly and annual earnings releases. In all other respects, Performance Criteria shall be calculated in accordance with the Company’s financial statements, under generally accepted accounting principles, or under a methodology established by the Committee prior to the issuance of an Award that is consistently applied and identified in the audited financial statements, including footnotes, or the Management Discussion and Analysis section of the Company’s annual report. However, to the extent Section 162(m) of the Code is applicable, the Committee may not in any event increase the amount of compensation payable to an individual upon the attainment of a Performance Goal.

6.6 Stock Appreciation Rights. An Award may be in the form of a SAR. The Grant Price of a SAR shall not be less than the Fair Market Value of the Common Stock subject to such SAR on the Date of Grant. The holder of a tandem SAR may elect to exercise either the Stock Option or the SAR, but not both. Subject to the foregoing provisions, the terms, conditions and limitations applicable to any SARs awarded to Employees pursuant to this Plan, including the Grant Price, the term of any SARs and the date or dates upon which they become exercisable, shall be determined by the Committee.

6.7 Effect of Award on Shareholders Agreement. Each Participant shall become a party to the Shareholders Agreement as a condition to the grant of any Award of Restricted Stock or the exercise of a Stock Option, whereupon such Participant shall be deemed to be a Shareholder (as defined in the Shareholders Agreement) for all purposes of the Shareholders Agreement.

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ARTICLE 7

AWARD PERIOD; VESTING

7.1 Award Period. Subject to the other provisions of this Plan, the Committee may, in its sole discretion, provide that an Incentive may not be exercised in whole or in part for any period or periods of time or beyond any date specified in the Award Agreement. Except as provided in the Award Agreement, an Incentive may be exercised in whole or in part at any time during its term. The Award Period for an Incentive shall be reduced or terminated upon Termination of Service. No Incentive granted under the Plan may be exercised at any time after the end of its Award Period. No portion of any Incentive may be exercised after the expiration of ten (10) years following its Date of Grant. However, if an Employee owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than ten percent (10%) of the combined voting power of all classes of stock of the Company (or any Parent or Subsidiary) and an Incentive Stock Option is granted to such Employee, the term of such Incentive Stock Option (to the extent required by the Code at the time of grant) may be no more than five (5) years following the Date of Grant.

7.2 Vesting. The Committee, in its sole discretion, may determine that an Incentive will be immediately vested in whole or in part, or that all or any portion may not be vested until a date, or dates, subsequent to its Date of Grant, or until the occurrence of one or more specified events, including a Change in Control, subject in any case to the terms of the Plan. If the Committee imposes conditions upon vesting, then, subsequent to the Date of Grant, the Committee may, in its sole discretion, accelerate the date on which all or any portion of the Incentive may be vested.

ARTICLE 8

EXERCISE OR CONVERSION OF INCENTIVE

8.1 In General. A. vested Incentive may be exercised or converted, during its Award Period, subject to limitations and restrictions set forth in the Award Agreement

8.2 Securities Law and Exchange Restrictions. In no event may an Incentive be exercised or shares of Common Stock issued pursuant to an Award if a necessary listing or quotation of the shares of Common Stock on a stock exchange or inter-dealer quotation system or any registration under state or federal securities laws required under the circumstances has not been accomplished.

8.3 Exercise of Stock Option.

(a) In General. If a Stock Option is exercisable prior to the time it is vested, the Common Stock obtained on the exercise of the Stock Option shall be Restricted Stock that is subject to the applicable provisions of the Plan and the Award Agreement. If the Committee imposes conditions upon exercise, then subsequent to the Date of Grant, the Committee may, in its sole discretion, accelerate the date on which all or any portion of the Stock Option may be exercised. No Stock Option may be exercised for a fractional share of Common Stock. The granting of a Stock Option will impose no obligation upon the Participant to exercise that Stock Option.

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(b) Notice and Payment. Subject to such administrative regulations as the Committee may from time to time adopt, a Stock Option may be exercised by the delivery of written notice to the Committee setting forth the number of shares of Common Stock with respect to which the Stock Option is to be exercised and the date of exercise thereof (the “Exercise Date”), which shall be at least three (3) days after giving such notice unless an earlier time shall have been mutually agreed upon. On the Exercise Date, the Participant shall deliver to the Company consideration with a value equal to the total Grant Price of the shares to be purchased, payable as provided in the Award Agreement, which may provide for payment in any one or more of the following ways: (a) cash or check, bank draft, or money order payable to the order of the Company, (b) Common Stock (including Restricted Stock) owned by the Participant on the Exercise Date, valued at its Fair Market Value on the Exercise Date, and which the Participant has not acquired from the Company within six (6) months prior to the Exercise Date, (c) by delivery (including by FAX) to the Company or its designated agent of an executed irrevocable option exercise form together with irrevocable instructions from the Participant to a broker or dealer, reasonably acceptable to the Company, to sell certain of the shares of Common Stock purchased upon exercise of the Stock Option or to pledge such shares as collateral for a loan and promptly deliver to the Company the amount of sale or loan proceeds necessary to pay such purchase price, or (d) in any other form of valid consideration that is acceptable to the Committee in its sole discretion. In the event that shares of Restricted Stock are tendered as consideration for the exercise of a Stock Option, a number of shares of Common Stock issued upon the exercise of the Stock Option with an Grant Price equal to the value of Restricted Stock used as consideration therefor shall be subject to the same restrictions and provisions as the Restricted Stock so tendered.

(c) Issuance of Certificate. Except as otherwise provided in Section 6.4 hereof (with respect to shares of Restricted Stock) or in the applicable Award Agreement, upon payment of all amounts due from the Participant, the Company shall cause certificates for the Common Stock then being purchased to be delivered as directed by the Participant (or the person exercising the Participant’s Stock Option in the event of his death) at its principal business office promptly after the Exercise Date; provided that if the Participant has exercised an Incentive Stock Option, the Company may at its option retain physical possession of the certificate evidencing the shares acquired upon exercise until the expiration of the holding periods described in Section 422(a)(1) of the Code. The obligation of the Company to deliver shares of Common Stock shall, however, be subject to the condition that, if at any time the Committee determines in its sole discretion that the listing, registration, or qualification of the Stock Option or the Common Stock upon any securities exchange or inter-dealer quotation system or under any state or federal law, or the consent or approval of any governmental regulatory body, is necessary as a condition of, or in connection with, the Stock Option or the issuance or purchase of shares of Common Stock thereunder, the Stock Option may not be exercised in whole or in part unless such listing, registration, qualification, consent, or approval shall have been effected or obtained free of any conditions not reasonably acceptable to the Committee.

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(d) Failure to Pay. Except as may otherwise be provided in an Award Agreement, if the Participant fails to pay for any of the Common Stock specified in such notice or fails to accept delivery thereof, that portion of the Participant’s Stock Option and right to purchase such Common Stock may be forfeited, at the option of the Committee.

8.4 Disqualifying Disposition of Incentive Stock Option. If shares of Common Stock acquired upon exercise of an Incentive Stock Option are disposed of by a Participant prior to the expiration of either two (2) years from the Date of Grant of such Stock Option or one (1) year from the transfer of shares of Common Stock to the Participant pursuant to the exercise of such Stock Option, or in any other disqualifying disposition within the meaning of Section 422 of the Code, such Participant must notify the Company in writing of the date and terms of such disposition. A disqualifying disposition by a Participant shall not affect the status of any other Stock Option granted under the Plan as an Incentive Stock Option within the meaning of Section 422 of the Code.

ARTICLE 9

AMENDMENT OR DISCONTINUANCE

Subject to the limitations set forth in this Article 9, the Board may at any time and from time to time, without the consent of the Participants, alter, amend, revise, suspend, or discontinue the Plan in whole or in part; provided, however, that no amendment for which shareholder approval is required either (i) by any securities exchange or inter-dealer quotation system on which the Common Stock is listed or traded or (ii) in order for the Plan and Incentives awarded under the Plan to continue to comply with Sections 162(m), 421, and 422 of the Code, including any successors to such Sections, may be effective unless such amendment shall be approved by the requisite vote of the shareholders of the Company entitled to vote thereon. Any such amendment shall, to the extent deemed necessary or advisable by the Committee, be applicable to any outstanding Incentives theretofore granted under the Plan, notwithstanding any contrary provisions contained in any Award Agreement. In the event of any such amendment to the Plan, the holder of any Incentive outstanding under the Plan shall, upon request of the Committee and as a condition to the exercisability thereof, execute a conforming amendment in the form prescribed by the Committee to any Award Agreement relating thereto. Notwithstanding anything contained in this Plan to the contrary, unless required by law, no action contemplated or permitted by this Article 9 shall adversely affect any rights of Participants or obligations of the Company to Participants with respect to any Incentive theretofore granted under the Plan without the consent of the affected Participant.

ARTICLE 10

TERM

The Plan shall be effective from the date that this Plan is approved by the Board. Unless sooner terminated by action of the Board, the Plan will terminate on October 23, 2023, but Incentives granted before that date will continue to be effective in accordance with their terms and conditions.

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ARTICLE 11

CAPITAL ADJUSTMENTS

In the event that any dividend or other distribution (whether in the form of cash, Common Stock, other securities, or other property), recapitalization, stock split, reverse stock split, rights offering, reorganization, merger, consolidation, split-up, spin-off, split-off, combination, subdivision, repurchase, or exchange of Common Stock or other securities of the Company, issuance of warrants or other rights to purchase Common Stock or other securities of the Company, or other similar corporate transaction or event affects the Common Stock such that an adjustment is determined by the Committee to be appropriate to prevent the dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan, then the Committee shall, in such mariner as it may deem equitable, adjust any or all of the (i) the number of shares and type of Common Stock (or the securities or property) that thereafter may be made the subject of Awards, (ii) the number of shares and type of Common Stock (or other securities or property) subject to outstanding Awards, (iii) the Grant Price of each outstanding Award, and (iv) the amount, if any, the Company pays for forfeited shares of Common Stock in accordance with Section 6.4; provided however, that the number of shares of Common Stock (or other securities or property) subject to any Award shall always be a whole number. In lieu of the foregoing, if deemed appropriate, the Committee may make provision for a cash payment to the holder of an outstanding Award. Notwithstanding the foregoing, no such adjustment or cash payment may be made or authorized to the extent that such adjustment or cash payment would cause the Plan or any Stock Option to violate Section 422 of the Code. Such adjustments shall be made in accordance with the rules of any securities exchange, stock market, or stock quotation system to which the Company is subject.

Upon the occurrence of any such adjustment or cash payment, the Company shall provide notice to each affected Participant of its computation of such adjustment or cash payment, which shall be conclusive and shall be binding upon each such Participant.

ARTICLE 12

RECAPITALIZATION, MERGER AND CONSOLIDATION

12.1 No Effect on Company’s Authority. The existence of this Plan and Incentives granted hereunder shall not affect in any way the right or power of the Company or its shareholders to make or authorize any or all adjustments, recapitalizations, reorganizations, or other changes in the Company’s capital structure and its business, or any Change in Control, or any merger or consolidation of the Company, or any issuance of bonds, debentures, preferred or preference stocks ranking prior to or otherwise affecting the Common Stock or the rights thereof (or any rights, options, or warrants to purchase same), or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of its assets or business, or any other corporate act or proceeding, whether of a similar character or otherwise.

12.2 Conversion of Incentives When Company Survives. Subject to any required action by the shareholders and except as otherwise provided by Section 12.4 hereof or as may be required to comply with Section 409A of the Code and the regulations or other guidance issued thereunder, if the Company shall be the surviving or resulting corporation in any merger, consolidation or share exchange, any Incentive granted hereunder shall pertain to and apply to the securities or rights (including cash, property, or assets) to which a holder of the number of shares of Common Stock subject to the Incentive would have been entitled.

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12.3 Exchange or Cancellation of Incentives When Company Does Not Survive. Except as otherwise provided by Section 12.4 hereof or as may be required to comply with Section 409A of the Code and the regulations or other guidance issued thereunder, in the event of any merger, consolidation or share exchange pursuant to which the Company is not the surviving or resulting corporation, there shall be substituted for each share of Common Stock subject to the unexercised portions of outstanding Incentives, that number of shares of each class of stock or other securities or that amount of cash, property, or assets of the surviving, resulting or consolidated company which were distributed or distributable to the shareholders of the Company in respect to each share of Common Stock held by them, such outstanding Incentives to be thereafter exercisable for such stock, securities, cash, or property in accordance with their terms.

12.4 Cancellation of Incentives. Notwithstanding the provisions of Sections 12.2 and 12.3 hereof, and except as may be required to comply with Section 409A of the Code and the regulations or other guidance issued thereunder, all Incentives granted hereunder may be canceled by the Company, in its sole discretion, as of the effective date of any Change in Control, merger, consolidation or share exchange, or any issuance of bonds, debentures, preferred or preference stocks ranking prior to or otherwise affecting the Common Stock or the rights thereof (or any rights, options, or warrants to purchase same), or of any proposed sale of all or substantially all of the assets of the Company, or of any dissolution or liquidation of the Company, by either:

(a) giving notice to each holder thereof or his personal representative of its intention to cancel those Incentives for which the issuance of shares of Common Stock involved payment by the Participant for such shares and, permitting the purchase during the thirty (30) day period next preceding such effective date of any or all of the shares of Common Stock subject to such outstanding Incentives, including in the Board’s discretion some or all of the shares as to which such Incentives would not otherwise be vested and exercisable; or

(b) in the case of Incentives that are either (i) settled only in shares of Common Stock, or (ii) at the election of the Participant, settled in shares of Common Stock, paying the holder thereof an amount equal to a reasonable estimate of the difference between the net amount per share payable in such transaction or as a result of such transaction, and the price per share of such Incentive to be paid by the Participant (hereinafter the “Spread”), multiplied by the number of shares subject to the Incentive. In cases where the shares constitute, or would after exercise, constitute Restricted Stock, the Company, in its discretion may include some or all of those shares in the calculation of the amount payable hereunder. In estimating the Spread, appropriate adjustments to give effect to the existence of the Incentives shall be made, such as deeming the Incentives to have been exercised, with the Company receiving the exercise price payable thereunder, and treating the shares receivable upon exercise of the Incentives as being outstanding in determining the net amount per share. In cases where the proposed transaction consists of the acquisition of assets of the Company, the net amount per share shall be calculated on the basis of the net amount receivable with respect to shares of Common Stock upon a distribution and liquidation by the Company after giving effect to expenses and charges, including but not limited to taxes, payable by the Company before such liquidation could be completed.

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(c) An Award that by its terms would be fully vested or exercisable upon a Change in Control will be considered vested or exercisable for purposes of Section 12.4(a) hereof.

ARTICLE 13

LIQUIDATION OR DISSOLUTION

Subject to Section 12.4 hereof, in case the Company shall, at any time while any Incentive under this Plan shall be in force and remain unexpired, (i) sell all or substantially all of its property, or (ii) dissolve, liquidate, or wind up its affairs, then each Participant shall be entitled to receive, in lieu of each share of Common Stock of the Company that such Participant would have been entitled to receive under the Incentive, the same kind and amount of any securities or assets as may be issuable, distributable, or payable upon any such sale, dissolution, liquidation, or winding up with respect to each share of Common Stock of the Company. If the Company shall, at any time prior to the expiration of any Incentive, make any partial distribution of its assets, in the nature of a partial liquidation, whether payable in cash or in kind (but excluding the distribution of a cash dividend payable out of earned surplus and designated as such) and an adjustment is determined by the Committee to be appropriate to prevent the dilution of the benefits or potential benefits intended to be made available under the Plan, then the Committee shall, in such manner as it may deem equitable, make such adjustment in accordance with the provisions of Article 11 hereof.

ARTICLE 14

INCENTIVES IN SUBSTITUTION FOR

INCENTIVES GRANTED BY OTHER ENTITIES

Incentives may be granted under the Plan from time to time in substitution for similar instruments held by employees, consultants or directors of a corporation, partnership, or limited liability company who become or are about to become Employees, Consultants or Outside Directors of the Company or any Parent or Subsidiary as a result of a merger or consolidation of the employing corporation with the Company, the acquisition by the Company of equity of the employing entity, or any other similar transaction pursuant to which the Company becomes the successor employer. The terms and conditions of the substitute Incentives so granted may vary from the terms and conditions set forth in this Plan to such extent as the Committee at the time of grant may deem appropriate to conform, in whole or in part, to the provisions of the Incentives in substitution for which they are granted.

ARTICLE 15

MISCELLANEOUS PROVISIONS

15.1 Investment Intent. The Company may require that there be presented to and filed with it by any Participant under the Plan, such evidence as it may deem necessary to establish that the Incentives granted or the shares of Common Stock to be purchased or transferred are being acquired for investment and not with a view to their distribution.

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15.2 No Right to Continued Employment. Neither the Plan nor any Incentive granted under the Plan shall confer upon any Participant any right with respect to continuance of employment by the Company or any Parent or Subsidiary.

15.3 Indemnification of Board and Committee. No member of the Board or the Committee, nor any officer or Employee of the Company acting on behalf of the Board or the Committee, shall be personally liable for any action, determination, or interpretation taken or made in good faith with respect to the Plan, and all members of the Board and the Committee, each officer of the Company, and each Employee of the Company acting on behalf of the Board or the Committee shall, to the extent permitted by law, be fully indemnified and protected by the Company in respect of any such action, determination, or interpretation.

15.4 Effect of the Plan. Neither the adoption of this Plan nor any action of the Board or the Committee shall be deemed to give any person any right to be granted an Award or any other rights except as may be evidenced by an Award Agreement, or any amendment thereto, duly authorized by the Committee and executed on behalf of the Company, and then only to the extent and upon the terms and conditions expressly set forth therein.

15.5 Compliance With Other Laws and Regulations. Notwithstanding anything contained herein to the contrary, the Company shall not be required to sell or issue shares of Common Stock under any Incentive if the issuance thereof would constitute a violation by the Participant or the Company of any provisions of any law or regulation of any governmental authority or any national securities exchange or interdealer quotation system or other forum in which shares of Common Stock are quoted or traded (including without limitation Section 16 of the 1934 Act and Section 162(m) of the Code); and, as a condition of any sale or issuance of shares of Common Stock under an Incentive, the Committee may require such agreements or undertakings, if any, as the Committee may deem necessary or advisable to assure compliance with any such law or regulation. The Plan, the grant and exercise of Incentives hereunder, and the obligation of the Company to sell and deliver shares of Common Stock, shall be subject to all applicable federal and state laws, rules and regulations and to such approvals by any government or regulatory agency as may be required.

15.6 Tax Requirements. The Company or, if applicable, any Parent or Subsidiary (for purposes of this Section 15.6, the term “Company” shall be deemed to include any applicable Parent or Subsidiary), shall have the right to deduct from all amounts paid in cash or other form in connection with the Plan, any Federal, state, local, or other taxes required by law to be withheld in connection with an Award granted under this Plan. The Company may, in its sole discretion, also require the Participant receiving shares of Common Stock issued under the Plan to pay the Company the amount of any taxes that the Company is required to withhold in connection with the Participant’s income arising with respect to the Award. Such payments shall be required to be made when requested by Company and may be required to be made prior to the delivery of any certificate representing shares of Common Stock. Such payment may be made (i) by the delivery of cash to the Company in an amount that equals or exceeds (to avoid the issuance of fractional shares under (iii) below) the required tax withholding obligations of the Company; (ii) if the Company, in its sole discretion, so consents in writing, the actual delivery by the exercising Participant to the Company of shares of Common Stock that the Participant has not acquired from the Company within six (6) months prior to the date of exercise, which shares so delivered have

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an aggregate Fair Market Value that equals or exceeds (to avoid the issuance of fractional shares under (iii) below) the required tax withholding payment; (iii) if the Company, in its sole discretion, so consents in writing, the Company’s withholding of a number of shares to be delivered upon the exercise of the Stock Option, which shares so withheld have an aggregate fair market value that equals (but does not exceed) the required tax withholding payment; or (iv) any combination of (i), (ii), or (iii). The Company may, in its sole discretion, withhold any such taxes from any other cash remuneration otherwise paid by the Company to the Participant. The Committee may in the Award Agreement impose any additional tax requirements or provisions that the Committee deems necessary or desirable.

15.7 Assignability. Incentive Stock Options may not be transferred, assigned, pledged, hypothecated or otherwise conveyed or encumbered other than by will or the laws of descent and distribution and may be exercised during the lifetime of the Participant only by the Participant or the Participant’s legally authorized representative, and each Award Agreement in respect of an Incentive Stock Option shall so provide. The designation by a Participant of a beneficiary will not constitute a transfer of the Stock Option. The Committee may waive or modify any limitation contained in the preceding sentences of this Section 15.7 that is not required for compliance with Section 422 of the Code.

Except as otherwise provided herein, Nonqualified Stock Options may not be transferred, assigned, pledged, hypothecated or otherwise conveyed or encumbered other than by will or the laws of descent and distribution. The Committee may, in its discretion, authorize all or a portion of a Nonqualified Stock Option to be granted to a Participant on terms which permit transfer by such Participant to (i) the spouse (or former spouse), children or grandchildren of the Participant (“Immediate Family Members”), (ii) a trust or trusts for the exclusive benefit of such Immediate Family Members, (iii) a partnership in which the only partners are (1) such Immediate Family Members and/or (2) entities which are controlled by Immediate Family Members, (iv) an entity exempt from federal income tax pursuant to Section 501(c)(3) of the Code or any successor provision, or (v) a split interest trust or pooled income fund described in Section 2522(c)(2) of the Code or any successor provision, provided that (x) there shall be no consideration for any such transfer, (y) the Award Agreement pursuant to which such Nonqualified Stock Option is granted must be approved by the Committee and must expressly provide for transferability in a manner consistent with this Section, and (z) subsequent transfers of transferred Nonqualified Stock Options shall be prohibited except those by will or the laws of descent and distribution.

Following any transfer, any such Nonqualified Stock Option shall continue to be subject to the same terms and conditions as were applicable immediately prior to transfer, provided that for purposes of Articles 8, 9, 11, 13 and 15 hereof the term “Participant” shall be deemed to include the transferee. The events of Termination of Service shall continue to be applied with respect to the original Participant, following which the Nonqualified Stock Options shall be exercisable or convertible by the transferee only to the extent and for the periods specified in the Award Agreement. The Committee and the Company shall have no obligation to inform any transferee of a Nonqualified Stock Option of any expiration, termination, lapse or acceleration of such Stock Option. The Company shall have no obligation to register with any federal or state securities commission or agency any Common Stock issuable or issued under a Nonqualified Stock Option that has been transferred by a Participant under this Section 15.7.

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15.8 Use of Proceeds. Proceeds from the sale of shares of Common Stock pursuant to Incentives granted under this Plan shall constitute general funds of the Company.

15.9 Legend. Each certificate representing shares of Restricted Stock issued to a Participant shall bear the following legend, or a similar legend deemed by the Company to constitute an appropriate notice of the provisions hereof (any such certificate not having such legend shall be surrendered upon demand by the Company and so endorsed):

On the face of the certificate:

“Transfer of this stock is restricted in accordance with conditions printed on the reverse of this certificate.”

On the reverse:

“The shares of stock evidenced by this certificate are subject to and transferable only in accordance with that certain Lung Therapeutics, Inc. 2013 Long-Term Incentive Plan, a copy of which is on file at the principal office of the Company in Austin, Texas. No transfer or pledge of the shares evidenced hereby may be made except in accordance with and subject to the provisions of said Plan. By acceptance of this certificate, any holder, transferee or pledgee hereof agrees to be bound by all of the provisions of said Plan.”

The following legend shall be inserted on a certificate evidencing Common Stock issued under the Plan if the shares were not issued in a transaction registered under the applicable federal and state securities laws:

“Shares of stock represented by this certificate have been acquired by the holder for investment and not for resale, transfer or distribution, have been issued pursuant to exemptions from the registration requirements of applicable state and federal securities laws, and may not be offered for sale, sold or transferred other than pursuant to effective registration under such laws, or in transactions otherwise in compliance with such laws, and upon evidence satisfactory to the Company of compliance with such laws, as to which the Company may rely upon an opinion of counsel satisfactory to the Company.”

A copy of this Plan shall be kept on file in the principal office of the Company in Austin, Texas.

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Exhibit 107

Calculation of Filing Fee Tables

Form S-8

(Form Type)

Aileron Therapeutics, Inc.

(Exact Name of Registrant as Specified in its Charter)

Table 1—Newly Registered Securities