X0306 4 2020-01-22 0 0001631650 Aimmune Therapeutics, Inc. AIMT 0001765473 Oxtoby Andrew AIMMUNE THERAPEUTICS, INC. 8000 MARINA BOULEVARD, SUITE 300 BRISBANE CA 94005-1884 0 1 0 0 Chief Commercial Officer Common Stock, $0.0001 par value 2020-01-22 4 F 0 1235 33.23 D 10765 D The reported sale was made pursuant to a pre-determined election to sell shares to cover tax withholding obligations in connection with the vesting of a previously reported equity award. Includes 9,000 restricted stock units ("RSUs") and will be settled in common stock upon vesting. The RSUs vest in four successive, equal, annual installments measured from January 19, 2019 subject to the Reporting Person's continued service relationship with the Issuer on each such vesting date. /s/ Douglas T. Sheehy, as Attorney-in-Fact for Andrew Oxtoby 2020-03-04