X0202 4 2008-05-14 0 0001060736 SEATTLE GENETICS INC /WA SGEN 0001106607 JP MORGAN PARTNERS BHCA LP C/O J.P. MORGAN PARTNERS LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001243235 JPMP MASTER FUND MANAGER L P C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001330534 JPMP CAPITAL CORP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001162622 JP MORGAN PARTNERS GLOBAL INVESTORS LP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001167095 J P MORGAN PARTNERS GLOBAL INVESTORS A LP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001169890 J P MORGAN PARTNERS GLOBAL INVESTORS CAYMAN LP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001169889 J P MORGAN PARTNERS GLOBAL INVESTORS CAYMAN II LP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001317638 JP MORGAN PARTNERS GLOBAL INVESTORS SELLDOWN LLP C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001361608 JP MORGAN PARTNERS GLOBAL INVESTORS SELLDOWN II L P C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 0001281161 JPMP GLOBAL INVESTORS L P C/O J.P. MORGAN PARTNERS, LLC 270 PARK AVENUE NEW YORK NY 10017 0 0 1 0 Class A Common Stock 2263980 D Class A Common Stock 2008-05-14 4 S 0 15150 10.10 D 535731 I See Footnote Class A Common Stock 2008-05-14 4 S 0 2065 10.10 D 73032 I See Footnote Class A Common Stock 2008-05-14 4 S 0 7689 10.10 D 271919 I See Footnote Class A Common Stock 2008-05-14 4 S 0 857 10.10 D 30295 I See Footnote Class A Common Stock 2008-05-14 4 S 0 5693 10.10 D 201326 I See Footnote Class A Common Stock 2008-05-14 4 S 0 89911 10.10 D 915496 I See Footnote Class A Common Stock 2008-05-14 4 S 0 764 10.10 D 27004 I See Footnote Class A Common Stock 2008-05-14 4 S 0 764 10.10 D 27004 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 2006-05-12 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 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), 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. $10.10 represents an average per share sale price for the shares sold on 5/14/2008. The sale price for shares sold on this day ranged from $10.03 to $10.24. J.P. Morgan Partners (BHCA), L.P., By: JPMP Master Fund Manager, L.P., its general partner, By: JPMP Capital Corp., its general partner, By: /s/ John C Wilmot, Manager Director 2008-05-15