X0306 4 2019-04-04 0 0001667633 Forty Seven, Inc. FTSV 0001743780 Takimoto Chris H C/O FORTY SEVEN, INC. 1490 O'BRIEN DRIVE, SUITE A MENLO PARK CA 94025 0 1 0 0 Chief Medical Officer Common Stock 2019-04-04 4 M 0 8000 2.015 A 8000 D Common Stock 2019-04-04 4 S 0 8000 16.3881 D 0 D Stock Option (right to buy) 2.015 2019-03-04 4 M 0 8000 0.00 D 2026-02-25 Common Stock 8000 135741 D The sale reported in this Form 4 was effected pursuant to a 10b5-1 trading plan. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.09 to $16.70, inclusive. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth this footnote. 1/4th of the shares subject to the option vested one year after February 8, 2016 and 1/48th of the shares subject to the option vest monthly thereafter, subject to Reporting Person's continuous service as of each such date. The shares subject to this option may be exercised prior to vesting, subject to Issuer's right to repurchase. /s/ John T. McKenna, Attorney-in-Fact for Chris H. Takimoto 2019-04-08