X0508 4 2024-01-31 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 false Common Stock 2024-01-31 4 A false 603500.00 0.00 A 2175372.00 D Common Stock 2024-02-01 4 S false 46489.00 1.68 D 2128883.00 D Common Stock 100000.00 I Held By John Butler GRAT November 2019 Common Stock 59928.00 I Held by John Butler 2019 GRAT Common Stock 100000.00 I Held By Dorothy Butler GRAT November 2019 Common Stock 59928.00 I Held by Dorothy Butler 2019 GRAT Stock Option (Right to buy) 1.68 2024-01-31 4 A false 905200.00 0.00 A 2034-01-31 Common Stock 905200.00 905200.00 D The restricted stock units were granted by the Issuer pursuant to its 2023 Stock Incentive Plan. One third of the restricted stock units will vest on each of the first, second and third anniversaries of the grant date, subject to the reporting person's continued service with the Issuer on each vesting date. Includes 1,500 shares of the Issuer's common stock purchased on June 30, 2023 and 1,500 shares of the Issuer's common stock purchased on December 29, 2023, each under the Issuer's Amended and Restated 2014 Employee Stock Purchase Plan. This sale was made automatically by the Issuer to cover tax withholding obligations in connection with the vesting and settlement of one-third of the reporting person's restricted stock units granted on January 31,2023. The options were granted by the Issuer pursuant to its 2023 Stock Incentive Plan. The options will vest over four years: 25% of the options will vest on the first anniversary of the grant date with the remaining 75% vesting in equal quarterly installments thereafter, subject to the reporting person's continued service with the Issuer on each vesting date. /s/ Carolyn Rucci, attorney-in-fact for John P. Butler 2024-02-02