X0303 4 2011-01-31 false 0001284812 COHEN & STEERS INC CNS 0001299637 Harvey Joseph M 280 PARK AVENUE, 10TH FLOOR NEW YORK NY 10017 false true false false President Common Stock 2011-01-31 4 A false 61760 0 A 1227913 D Common Stock 2011-01-31 4 F false 33294 28.37 D 1194619 D Includes 21,578 restricted stock units (RSUs) mandatorily deferred by CNS from the reporting person?s annual incentive performance bonus, plus 5,394 RSUs granted to the reporting person as a company match on such deferral. Dividends paid on CNS common stock are reflected in additional RSUs on such deferred and matching RSUs. The deferred and matching RSUs vest ratably over four years, and the dividend RSUs vest on the fourth anniversary of the grant. Footnote 1 continued: Also includes 11,009 RSUs voluntarily deferred by the reporting person from his annual incentive performance bonus, plus 2,752 RSUs granted to him as a company match on such deferral. Dividends paid on CNS common stock are reflected in additional RSUs on such deferred and matching RSUs. The deferred RSUs are immediately vested (but delivered on the third anniversary of grant) and the matching and accrued dividend RSUs vest and are delivered on the third anniversary of the grant. Also includes 21,027 RSUs that generally vest over four years. Salvatore Rappa, Attorney-in-Fact 2011-02-01