Exhibit 99.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the accompanying Annual Report on Form 10-K of Seattle
Genetics, Inc. (the "Company") for the year ended December 31, 2002 as filed
with the Securities and Exchange Commission on the date hereof (the "Report"),
I, Tim Carroll, Chief Financial Officer of the Company, hereby certify pursuant
to 18 U.S.C. 1350, as adopted pursuant to (s) 906 of the Sarbanes-Oxley Act of
2002, that, to the best of my knowledge:

     (1) the Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934, as amended; and

     (2) the information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company

Date:  March 27, 2003                       /s/ Tim Carroll
       --------------------                 ------------------------------------
                                            Tim Carroll
                                            Chief Financial Officer

A signed original of this written statement required by Section 906 has been
provided to the registrant and will be retained by the registrant and furnished
to the Securities and Exchange Commission or its staff upon request.