1.Where is Cytomx incorporated?
2.Where is Cytomx’s corporate headquarters?
3.When is Cytomx’s fiscal year-end?
4.Who is Cytomx’s independent registered public accounting firm?
5.Who is Cytomx’s legal counsel?
6.On which exchange is Cytomx listed, what is the ticker symbol, and when did Cytomx go public?
7.How can I purchase or sell shares of Cytomx’s common stock?
8.Does Cytomx issue dividends on its common stock?
9.What is the CUSIP number for Cytomx’s common stock?
10.Who is Cytomx’s transfer agent?
11.Who do I contact regarding lost stock certificates, address changes, and changes of ownership or name in which shares are held?
12.How do I contact Cytomx with additional questions or inquiries?
1.Where is Cytomx incorporated?
 CytomX Therapeutics, Inc. was incorporated in Delaware in September 2010.

2.Where is Cytomx’s corporate headquarters?
 CytomX’s corporate headquarters is located at:
343 Oyster Point Boulevard, Suite 100
South San Francisco, CA 94080-1913

3.When is Cytomx’s fiscal year-end?
 CytomX’s fiscal year ends December 31st.

4.Who is Cytomx’s independent registered public accounting firm?
 PricewaterhouseCoopers LLP is CytomX’s independent registered public accounting firm.

5.Who is Cytomx’s legal counsel?
 CyotmX’s legal counsel is Sidley Austin LLP, Palo Alto, CA

6.On which exchange is Cytomx listed, what is the ticker symbol, and when did Cytomx go public?
 CytomX’s common stock is traded under the ticker symbol “CTMX” on The NASDAQ Global Market. CytomX’s initial public offering was in September 2015.

7.How can I purchase or sell shares of Cytomx’s common stock?
 Shares can be purchased through a licensed securities broker. CytomX does not have a direct stock purchase program.

8.Does Cytomx issue dividends on its common stock?
 CytomX does not pay cash dividends on its common stock.

9.What is the CUSIP number for Cytomx’s common stock?
 CUSIP Number: 23284F 105

10.Who is Cytomx’s transfer agent?
 Computershare Investor Services
P.O. Box 43078
Providence, RI 02940
www.computershare.com/investor

11.Who do I contact regarding lost stock certificates, address changes, and changes of ownership or name in which shares are held?
 Computershare Investor Services
P.O. Box 43078
Providence, RI 02940
877-373-6374
www.computershare.com/investor

12.How do I contact Cytomx with additional questions or inquiries?
 Please submit an inquiry via our contact form