13G Filing: Matrix Capital Management and Trillium Therapeutics Inc (TRIL)

1

NAMES OF REPORTING PERSONS

Matrix Capital Management Company LP

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(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

– 0 –

6

SHARED VOTING POWER

2,173,000

7

SOLE DISPOSITIVE POWER

– 0 –

8

SHARED DISPOSITIVE POWER

2,173,000

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,173,000

10

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

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

16.5%

12

TYPE OF REPORTING PERSON

IA, PN

Page 2 of 8 – SEC Filing

1	NAMES OF REPORTING PERSONS Matrix Capital Management Company LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(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 – 0 –
	6	SHARED VOTING POWER 2,173,000
	7	SOLE DISPOSITIVE POWER – 0 –
	8	SHARED DISPOSITIVE POWER 2,173,000
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,173,000
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 16.5%
12	TYPE OF REPORTING PERSON IA, PN