CYOU [Changyou.com] SC 13G/A: CUSIP No. 15911M107 13G Page 2 of 5
[CUSIP No. 15911M107 13G Page 2 of 5 Pages 1. NAMES OF REPORTING PERSONS BlueMountain Capital Management, LLC 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) ☐ (b) ☒ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTIN]