|BofA Merrill Lynch||Ying Huang|
|Canaccord Genuity Inc.||John Newman, Ph.D.|
|Jefferies LLC||Eun K. Yang, Ph.D.|
|William Blair||Y. Katherine Xu, Ph.D.|
The foregoing list includes the names of all brokerage firms known by the company as of July 26, 2017 to have analysts covering the company. This list may not be complete and is subject to change as firms add or delete coverage. The company disclaims any responsibility to update this list on a timely basis. Please note that any opinions, estimates or forecasts regarding the company made by these analysts are theirs alone and may not represent the opinions, estimates or forecasts of the company. The company is providing this list as a service to its stockholders and is not by this listing implying its endorsement of or concurrence with such analyst reports. Interested persons must obtain copies of analysts’ reports on their own; the company does not distribute these reports.