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Seattle Genetics Inc (SGEN): Baker Bros. Keeps Buying Shares

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Seattle Genetics Inc. (NASDAQ:SGEN) is the subject of a new 13D filing issued by Julian Baker and Felix Baker‘s Baker Bros. Advisors. Among other things, the filing shows that the healthcare investment firm continues to buy shares of Seattle Genetics, having added about 1.36 million shares of the company to its portfolio since a filing in late February. The investors now own 29.5% of the company’s shares.

Item 4 of the filing was updated with the following information related to exercised stock options:

“On March 8, 2016 the Adviser acquired beneficial ownership of 10,000 shares of common stock of Seattle Genetics, Inc. (the “Issuer”), as a result of the exercise of 10,000 options to purchase the Issuer’s common stock at $4.18 per share (the “Exercised Stock Options”) held directly by Felix J. Baker. Felix J. Baker currently serves on the Issuer’s Board of Directors (the “Board”) as a representative of the Funds. The policy of the Funds and the Adviser does not permit employees of the Adviser to receive compensation for serving as directors of the Issuer, and the Funds are instead entitled to the pecuniary interest in the Exercised Stock Options. Felix J. Baker, as an agent in his capacity as a director of the Issuer, entered into a proceeds agreement (the “Proceeds Agreement”) with the Adviser on March 8, 2016. Pursuant to the Proceeds Agreement, Felix J. Baker agreed that, with respect to the Exercised Stock Options and the common stock received as a result of the exercise of the Exercised Stock Options (the “Common Stock”) on March 8, 2016, the Adviser will have dispositive power as well as the ability to control the timing of exercise of the Exercised Stock Options and that any proceeds from the sale of the Common Stock will be remitted to the Adviser net of brokerage commissions. Other than through their control of the Adviser, Felix J. Baker and Julian C. Baker have neither voting nor dispositive power and have no direct pecuniary interest in the Exercised Stock Options or the Common Stock. Pursuant to the Proceeds Agreement, the Adviser funded Felix J. Baker’s exercise of the Exercised Stock Options through loans from the Funds (the “Loan Agreements”). The total amount expended on acquiring the Common Stock was $41,800. In order to effect the exercise of the Exercised Stock Options, on March 8, 2016, the Adviser entered into the Loan Agreements with the Funds pursuant to which 667 and Life Sciences loaned $4,322.12 and $37,477.88, respectively, totaling $41,800 to the Adviser for the purpose of acquiring the Common Stock. The loan is due March 8, 2046, or earlier if the Common Stock are sold (“Due Date”), with interest payable through the Due Date at a rate of 2.33% annually.”

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Baker Bros. Advisors 41,167,299 0 41,167,299 0 41,167,299 29.4%
Baker Bros. Advisors (GP) 41,167,299 0 41,167,299 0 41,167,299 29.4%
Julian C. Baker 41,305,724 0 41,305,724 0 41,305,724 29.5%
Felix J. Baker 41,305,731 0 41,305,731 0 41,305,731 29.5%
FBB 18,243 0 18,243 0 18,243 (1)14 TYPE OF REPORTING PERSON (See Instructions) OO(1) The percentage of ownership is less than 0.1%
FBB3 12,678 0 12,678 0 12,678 (1)14 TYPE OF REPORTING PERSON (See Instructions) OO(1) The percentage of ownership is less than 0.1%
Julian Baker And Felix Baker
Julian Baker And Felix Baker
Baker Bros. Advisors

Page 1 of 15 SEC Filing

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D
Under the Securities Exchange Act of 1934

(Amendment No. 19)

Seattle Genetics, Inc.
(Name of Issuer)
Common Stock, par value $0.001 per share
(Title of Class of Securities)
812578102
(CUSIP Number)

Alexandra A. Toohey

Chief Financial Officer

Baker Bros. Advisors LP
667 Madison Avenue, 21st Floor
New York, NY 10065
(212) 339-5690

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
March 8, 2016
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed
a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because
of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. ¨

 

Note: Schedules filed in paper format
shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom
copies are to be sent.

*The remainder of this cover page shall
be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for
any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder
of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act
of 1934 (the “Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all
other provisions of the Act (however, see the Notes).

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