X0303 4 2011-03-29 0 0001125920 SHUTTERFLY INC SFLY 0001464429 Day Neil C/O SHUTTERFLY, INC. 2800 BRIDGE PARKWAY REDWOOD CITY CA 94065 0 1 0 0 SVP, Chief Technology Officer Common Stock 2011-03-29 4 S 0 7279 50.00 D 19301 D The transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 13, 2010. This Statement confirms that the undersigned, Neil M. Day, Jr., has authorized and designated Charlotte Falla and John Kaelle to execute and file on the undersigned's behalf all Forms 3, 4, and 5 (including any amendments thereto) that the undersigned may be required to file with the U.S. Securities and Exchange Commission as a result of the undersigned's ownership of or transactions in securities of Shutterfly, Inc. The authority of Charlotte Falla and John Kaelle under this Statement shall continue until the undersigned is no longer required to file Forms 3, 4, and 5 with regard to the undersigned's ownership of or transactions in securities of Shutterfly, Inc., unless earlier revoked in writing. The undersigned acknowledges that Charlotte Falla and John Kaelle are not assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934. Date: June 14, 2010 /s/ Neil M. Day Jr. /s/ Charlotte Falla, Attorney in Fact 2011-03-30