POWER OF ATTORNEY
Know all by these presents, that the undersigned hereby constitutes and appoints each of Stephen
Kay, Christy Lillquist, Mark Tanoury, John McKenna and Seth Gottlieb, signing individually, the
undersigned's true and lawful attorneys-in fact and agents to:
(1) execute for and on behalf of the undersigned, in the undersigned's capacity as an
officer, director or beneficial owner of more than 10% of a registered class of securities of Roku,
Inc. (the "Company"), Forms 3, 4 and 5 (including any amendments thereto) in accordance with
Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") and the
rules thereunder and a Form ID, Uniform Application for Access Codes to File on EDGAR;
(2) do and perform any and all acts for and on behalf of the undersigned that may be
necessary or desirable to execute such Forms 3, 4 or 5 or Form ID (including any amendments
thereto) and timely file such forms with the United States Securities and Exchange Commission
and any stock exchange or similar authority; and
(3) take any other action of any nature whatsoever in connection with the foregoing
which, in the opinion of such attorney-in-fact, may be of benefit, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by such attorney-
in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-
fact's discretion.
The undersigned hereby grants to each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully
do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request
of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Exchange Act.
This Power of Attorney shall remain in full force and effect until the earliest to occur of (a) the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of
and transactions in securities issued by the Company, (b) revocation by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact or (c) as to any attorney-in-fact individually, until
such attorney-in-fact is no longer employed by the Company or Cooley LLP.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of
March 29, 2019.
/s/ Ray Rothrock
Ray Rothrock
201606215 v1
