UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934
(Amendment No. )
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| ☐ | Definitive Proxy Statement | |
| ☒ | Definitive Additional Materials | |
| ☐ | Soliciting Material Pursuant to § 240.14a-12 | |
| CytomX Therapeutics, Inc. |
| (Name of Registrant as Specified In Its Charter) |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |
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