667 lp - see footnote investment history in Seattle genetics inc wa

Filed on 2013-05-21 by 667, L.P. SEC CIK 1551139 Form 3

Accession 0001144204-13-030879.txt Sec File: edgar/data/1551139/0001144204-13-030879-index.htm

2013-05-17 667 Lp (CIK 1551139) through See Footnote

Invested in Seattle Genetics Inc Wa remaining shares owned 3868576

Common Stock Seattle Genetics Inc Wa Sgen

f1 the shares of common stock of seattle genetics inc. reported herein are held directly by 667, l.p. ("667"), a limited partnership the sole general partner of which is baker biotech capital, l.p., a limited partnership the sole general partner of which is baker biotech capital (gp), llc. julian c. baker and felix j. baker are the controlling members of baker biotech capital (gp), llc. baker bros. advisors, llc (the "adviser") serves as the investment adviser to 667. in connection with the services provided by the adviser, the adviser receives an asset-based management fee that does not confer any pecuniary interest. on april 12, 2012, the adviser, 667 and the general partner of 667 entered into an amended and restated management agreement which gave the adviser complete and unlimited discretion and authority with respect to 667's investments and voting power over investments. the general partner of 667 relinquished all discretion and authority with respect to 667's investments and voting power over investments. julian c. baker and felix j. baker each may be deemed to control the adviser and to indirectly beneficially own the shares beneficially owned by it. julian c. baker and felix j. baker disclaim beneficial ownership of these securities, except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that felix j. baker or julian c. baker is the beneficial owner of the above referenced securities for purposes of section 16 or for any other purpose. the shares reported herein have been previously reported by felix j. baker, julian c. baker and the adviser in their own section 16 reports. in the future, 667 may jointly file section 16 reports with julian c. baker, felix j. baker and the adviser.