X0306 4 2021-03-16 false 0001517022 Akebia Therapeutics, Inc. AKBA 0001591467 Butler John P. C/O AKEBIA THERAPEUTICS, INC. 245 FIRST STREET CAMBRIDGE MA 02142 true true false false CEO and President Common Stock 2021-03-16 4 A false 39520.00 0.00 A 1156262.00 D Common Stock 100000.00 I Held By Dorothy Butler GRAT November 2019 Common Stock 100000.00 I Held By John Butler GRAT November 2019 Common Stock 59928.00 I Held by Dorothy Butler 2019 GRAT Common Stock 59928.00 I Held by John Butler 2019 GRAT Common Stock 31047.00 I Held by Dorothy Butler Revocable Trust 2007 Common Stock 31047.00 I Held by John Butler Revocable Trust 2007 As previously disclosed, in February 2020, the Reporting Person was granted performance-based restricted stock unit awards ("PSUs") pursuant to the Issuer's 2014 Incentive Plan, as amended. The PSUs vest in connection with the achievement of specified commercial and regulatory milestones. On February 25, 2021, the Company reported its financial results for the year ended December 31, 2020. Subsequently, in accordance with the terms of the grant, the Issuer's Compensation Committee certified the achievement of a commercial milestone and, as a result, one third of the reported PSUs will vest on each of March 31, 2021, February 28, 2022 and February 28, 2023, subject to the Reporting Person's continued service with the Issuer on each vesting date. /s/ Andrea J. Paul, attorney-in-fact for John P. Butler 2021-03-18