13G Filing: Visium Asset Management Has Nearly Doubled Its Stake in La Jolla Pharmaceutical Co (LJPC)

NAMES OF
REPORTING PERSONS

I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (Entities Only)

Visium Balanced Master Fund, Ltd.

CHECK THE APPROPRIATE BOX IF A MEMBER
OF A GROUP*

(a)  ¨        (b)  ¨

SEC USE ONLY

CITIZENSHIP OR PLACE OF
ORGANIZATION

Cayman Islands

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

SOLE VOTING POWER

None

SHARED VOTING POWER

1,182,013 (See Item 4)

SOLE DISPOSITIVE POWER

None

SHARED DISPOSITIVE POWER

1,182,013 (See Item 4)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,182,013 (See Item 4)

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

Not Applicable

PERCENT OF CLASS REPRESENTED BY AMOUNT
IN ROW (9)

6.5%

TYPE OF REPORTING PERSON*

CO