13G Filing: Partner Fund Management and Endologix Inc (ELGX)

1.

NAME OF REPORTING PERSONS

S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Partner Fund Management, L.P.

2.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

(a) o

(b) x

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

5,278,282 shares

7.

SOLE DISPOSITIVE POWER

0

8.

SHARED DISPOSITIVE POWER

See Row 6 above

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON See Row 6 above
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.4%¹
12.	TYPE OF REPORTING PERSON IA; PN

Page 2 of 13 – SEC Filing

1.	NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Partner Fund Management, L.P.
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) x
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 5,278,282 shares
		7.	SOLE DISPOSITIVE POWER 0
		8.	SHARED DISPOSITIVE POWER See Row 6 above