X0306 4 2017-01-19 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 2017-01-19 4 M false 20000.00 0.47 A 373480.00 D Stock Option (Right to buy) 0.47 2017-01-19 4 M false 20000.00 0.00 D 2023-09-16 Common Stock 20000.00 387000.00 D This transaction represents the acquisition of common stock as a result of the exercise and hold of derivative securities reported in Table II. The total amount of beneficial securities includes 1,500 shares of stock purchased on June 30, 2016 at $6.35 per share and 807 shares of stock purchased on December 30, 2016 at $6.48 per shares in connection with the Issuer's Employee Stock Purchase Plan. 25% of this option vested on September 16, 2014. The remaining shares vest in equal monthly installments through September 1, 2017. Nicole R. Hadas, attorney-in-fact for John P. Butler 2017-01-23