13G Filing: Ken Griffin Takes Big Stake in Oclaro, Inc. (OCLR)

1.

NAME OF REPORTING PERSON

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

Citadel Advisors LLC

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

6,563,077 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     ¨

11.

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

5.6%¹

12.

TYPE OF REPORTING PERSON

IA; OO; HC

The percentages reported in this Schedule 13G are based upon 117,608,999 shares of common stock outstanding
(composed of (i) 111,045,922 shares of common stock outstanding as of January 29, 2016 (according to the Form 10-Q filed by the
issuer with the Securities and Exchange Commission on February 4, 2016 and (ii) approximately 6,563,077 shares issuable upon the
conversion of certain convertible notes held by the Reporting Persons and certain of their affiliates)).