Erik Ostrowski - 02 Feb 2026 Form 4 Insider Report for Akebia Therapeutics, Inc. (AKBA)

Signature
/s/ Carolyn M. Rucci, attorney-in-fact for Erik Ostrowski
Issuer symbol
AKBA
Transactions as of
02 Feb 2026
Net transactions value
-$48,582
Form type
4
Filing time
04 Feb 2026, 16:11:02 UTC
Previous filing
03 Feb 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ostrowski Erik SVP, CFO, CBO & Treasurer C/O AKEBIA THERAPEUTICS, INC, 245 FIRST ST., CAMBRIDGE /s/ Carolyn M. Rucci, attorney-in-fact for Erik Ostrowski 04 Feb 2026 0001762507

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AKBA Common Stock Sale $48,582 -34,951 -4.9% $1.39 672,635 02 Feb 2026 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 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, 2025.
F2 This sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.