X0306 4/A 2017-12-13 2017-12-15 0 0001284812 COHEN & STEERS INC CNS 0001181438 STEERS ROBERT HAMILTON 280 PARK AVE, 10TH FLOOR NEW YORK NY 10017 1 1 1 0 Chief Executive Officer Common Stock 2017-11-29 4 G 0 115000 0.00 D 6872091 D Common Stock 2017-12-13 4 A 0 4159 0.00 A 6876250 D This amendment is being filed to report a gift of 115,000 shares of common stock and to correct the balance of common stock beneficially owned following the reported transaction to properly reflect the correct number of shares of common stock disposed of in connection with such gift. As a result of the error in the balance of common stock beneficially owned following the reported transaction, the number of shares of common stock beneficially owned following reported transactions was understated in two additional Form 4 filings filed on February 2, 2018 and March 26, 2018. Represents the acquisition of dividend equivalent restricted stock units in connection with the issuer's fourth quarter 2017 regular and special dividends and accrued to the reporting person on unvested restricted stock units granted in January 2014, January 2015, January 2016, and January 2017. /s/ Francis C. Poli, Attorney-in-Fact 2018-05-02