13G Filing: Baker Bros. Advisors and Anacor Pharmaceuticals, Inc. (ANAC)

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Page 2 of 10 SEC Filing

 

CUSIP No.  032420101

1

NAMES OF REPORTING PERSONS

 

Baker Bros. Advisors LP

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)

(a) ¨  

(b) ¨

 

3

SEC USE ONLY

 

4

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

5

SOLE VOTING POWER

 

4,871,046

6

SHARED VOTING POWER

-0-

7

SOLE DISPOSITIVE POWER

 

4,871,046

8

SHARED DISPOSITIVE POWER

 

-0-

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY
EACH REPORTING PERSON

 

4,871,046

10

CHECK BOX IF THE AGGREGATE AMOUNT IN
ROW (9) EXCLUDES CERTAIN SHARES

(See Instructions)

¨
11

PERCENT OF CLASS REPRESENTED BY AMOUNT
IN ROW 9

 

11.0% (1)

12

TYPE OF REPORTING PERSON (See Instructions)

IA, PN

(1) Based on 44,123,977 shares
of common stock outstanding as of October 30, 2015, as reported in the Issuer’s Form 10-Q filed with the SEC on November
6, 2015.
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