X0202 4 2007-12-10 0 0001060736 SEATTLE GENETICS INC /WA SGEN 0001106607 JP MORGAN PARTNERS BHCA LP J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 Class A Common Stock 2236980 D Class A Common Stock 2007-12-10 4 S 0 2616 12.63 D 557234 I See Footnote Class A Common Stock 2007-12-10 4 S 0 1328 12.63 D 282832 I See Footnote Class A Common Stock 2007-12-10 4 S 0 357 12.63 D 75963 I See Footnote Class A Common Stock 2007-12-10 4 S 0 148 12.63 D 31512 I See Footnote Class A Common Stock 2007-12-10 4 S 0 983 12.63 D 209407 I See Footnote Class A Common Stock 2007-12-10 4 S 0 15528 12.63 D 1043112 I See Footnote Class A Common Stock 2007-12-10 4 S 0 132 12.63 D 28088 I See Footnote Class A Common Stock 2007-12-10 4 S 0 132 12.63 D 28088 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 469594 469594 D Warrants 6.25 2003-07-08 2011-12-31 Common Stock 101421 101421 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 13826 13826 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 51478 51478 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 5736 5736 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 38114 38114 I See Footnote Warrants 6.25 2003-07-08 2011-12-31 Common Stock 132331 132331 I See Footnote Stock Options (Right to Purchase) 7.26 2005-05-16 2014-05-16 Common Stock 10000 10000 I See Footnote Stock Options (Right to Purchase) 5.11 2016-05-12 2015-05-12 Common Stock 10000 10000 I See Footnote Stock Options (Right to Purchase) 10.20 2008-05-24 2017-05-25 Common Stock 10000 10000 I See Footnote The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors, L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors (Cayman), L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors A, L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors (Cayman) II, L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors (Selldown), L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by J.P. Morgan Partners Global Investors (Selldown) II, L.P. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by H&Q Holdings, Inc. The Reporting Person has no pecuniary interest in such securities. The amount shown represents the beneficial ownership of the Issuer's equity securities by H&Q Employee Venture Fund 2000, L.P. The Reporting Person has no pecuniary interest in such securities. These options were granted to Srinivas Akkaraju, a director of the Issuer. Mr. Akkaraju is obligated to transfer any shares issued under the Stock Option to J.P. Morgan Partners (BHCA), L.P. ("JPM BHCA") at the request of JPM BHCA. J.P. Morgan Partners (BHCA), L.P. 2007-12-12 By: JPMP Master Fund Manager, L.P., its general partner 2007-12-12 By: JPMP Capital Corp., its general partner 2007-12-12 /s/ John C. Wilmot, Managing Director 2007-12-12