Farallon Capital Partners DFAN14A Additional proxy materials by non-management

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

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o Preliminary Proxy Statement

o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

o Definitive Proxy Statement

o Definitive Additional Materials

þ Soliciting Material Under Rule 14a-12

Exelixis, Inc.

(Name of Registrant as Specified in Its Charter)

Farallon Capital Partners, L.P.

Farallon Capital Institutional Partners, L.P.

Farallon Capital Institutional Partners II, L.P.

Farallon Capital Institutional Partners III, L.P.

Four Crossings Institutional Partners V, L.P.

Farallon Capital Offshore Investors II, L.P.

Farallon Capital (AM) Investors, L.P.

Farallon Capital F5 Master I, L.P.

Farallon Healthcare Partners Master, L.P.

Farallon Capital Management, L.L.C.

Farallon Partners, L.L.C.

Farallon Institutional (GP) V, L.L.C.

Farallon F5 (GP), L.L.C.

Farallon Healthcare Partners (GP), L.L.C.

Joshua J. Dapice

Philip D. Dreyfuss

Hannah E. Dunn

Michael B. Fisch

Richard B. Fried

Varun N. Gehani

Nicolas Giauque

David T. Kim

Michael G. Linn

Rajiv A. Patel

Thomas G. Roberts, Jr.

Edric C. Saito

William Seybold

Daniel S. Short

Andrew J. M. Spokes

John R. Warren

Mark C. Wehrly

Richard Bollini

Colby Clark

Cameron Hillyer

David A. Posner

Matthew Trentini

Tomas J. Heyman

David E. Johnson

Robert “Bob” Oliver, Jr.

Caligan Partners LP

Caligan Partners Master Fund LP

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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