13D Filing: Baker Bros. Advisors and Beigene, Ltd. (BGNE)

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Page 3 of 10 SEC Filing

CUSIP No.    07725L102 Page   3   of   10   Pages

1.

NAMES OF REPORTING PERSONS

Baker Bros. Advisors (GP) LLC

2.

CHECK
THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a) ¨

(b)
¨

3.

SEC USE ONLY

4.

SOURCE OF FUNDS*

OO

5.

CHECK
BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
o

6.

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

NUMBER
OF SHARES
BENEFICIALLY
OWNED
BY EACH
REPORTING
PERSON
WITH

7.

SOLE VOTING POWER: 105,199,597 (1)

8.

SHARED VOTING POWER: 0

9.

SOLE DISPOSITIVE POWER: 105,199,597 (1)

10.

SHARED DISPOSITIVE POWER: 0

11.

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:

105,199,597 (1)

12.

CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
¨

 

13.

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

24.6% (2)

14.

TYPE OF REPORTING PERSON*

HC, OO

(1) Includes 24,864,840 of the Ordinary Shares reported as
beneficially owned that are beneficially owned through American Depositary Shares. Each American Depositary Share represents 13
Ordinary Shares of the Issuer.
(2) Based on 427,442,865 Ordinary Shares outstanding as of
February 8, 2016, according to information received from the Issuer on February 9, 2016.

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