X0306 4 2017-12-14 0 0001679688 Colony NorthStar, Inc. CLNS 0001139257 HAMAMOTO DAVID T C/O COLONY NORTHSTAR, INC., 515 SOUTH FLOWER STREET, 44TH FLOOR LOS ANGELES CA 90071 1 1 0 0 Executive Vice Chairman Class A Common Stock 2017-12-14 4 S 0 136930 12.1337 D 100629 I By the David T. Hamamoto GRAT 2015-NSAM Class A Common Stock 2017-12-14 4 S 0 132199 12.1337 D 164118 I By the David T. Hamamoto GRAT 2016-NSAM Class A Common Stock 2017-12-14 4 S 0 35657 12.1337 D 119389 I By the David T. Hamamoto GRAT 2016-NRF Class A Common Stock 2017-12-14 4 S 0 805174 12.1452 D 2103147 D Class A Common Stock 2017-12-15 4 S 0 666169 12.0367 D 1436978 D Class A Common Stock 2017-12-18 4 S 0 449780 12.0488 D 987198 D Class A Common Stock 89956 I By the David T. Hamamoto GRAT 2015-NRF Class A Common Stock 10108 I By DTH Investment Holdings LLC The dispositions were executed in a series of intraday transactions with the high sales price at $12.25 and the low sales price at $12.045. The dispositions were executed in a series of intraday transactions with the high sales price at $12.25 and the low sales price at $12.045. Excludes 103,683 shares of the Company's class A common stock that were distributed to the reporting person and are reported in this Form 4 as directly owned. The dispositions were executed in a series of intraday transactions with the high sales price at $12.25 and the low sales price at $12.045. Excludes 72,573 shares of the Company's class A common stock that were distributed to the reporting person and are reported in this Form 4 as directly owned. The dispositions were executed in a series of intraday transactions with the high sales price at $12.25 and the low sales price at $12.045. Includes 176,256 shares of the Company's class A common stock previously held in certain grantor annuity trusts that were distributed to the reporting person and are reported in this Form 4 as directly owned. The dispositions were executed in a series of intraday transactions with the high sales price at $12.14 and the low sales price at $12.00. The dispositions were executed in a series of intraday transactions with the high sales price at $12.17 and the low sales price at $11.975. /s/ David A. Palame, as Attorney-in-fact 2017-12-18