OmniAb Inc

Rule 10b5-1 Trading Arrangements

From time to time, our officers (as defined in Rule 16a-1(f) of the Exchange Act) and directors may enter into Rule 10b5-1 or non-Rule 10b5-1 trading arrangements (as each such term is defined in Item 408 of Regulation S-K). During the three months ended June 30, 2024, certain of our officers adopted such trading arrangements as described below.

On May 17, 2024, Kurt Gustafson, our Executive Vice President, Finance and Chief Financial Officer, and Charles S. Berkman, our Chief Legal Officer and Secretary, and on May 25, 2024, Matthew Foehr, our President and Chief Executive Officer, each entered into a sell-to-cover arrangement intended to comply with the requirements of Rule 10b5-1(c) authorizing the pre-arranged sale of common shares to satisfy tax withholding obligations of the Company arising from the vesting of RSUs and PRSUs, and the related issuance of shares of common stock, issued pursuant to our equity incentive plans. The amount of common shares to be sold to satisfy the Company’s tax withholding obligations under each arrangement is dependent on future events which cannot be known at this time, including the future trading price of our common stock. The expiration date relating to each arrangement is dependent on future events which cannot be known at this time, including the final vesting date of the applicable RSUs and PRSUs and the officer’s termination of service.