AHPAU Avista Public Acquisition Corporation II

On November 18, 2022, OmniAb, Inc. (the “Company”) announced that Janssen Biotech, Inc. (“Janssen”) has notified the Company that the first commercial sale (as defined under the terms of the licensing agreement between OmniAb and an affiliate of Janssen) of TECVAYLI^™ (teclistamab) in the United States had occurred, and the Company now expects to receive the related $25 million milestone payment and expects to book $25 million of milestone revenue in Q4 2022.

Forward-Looking Statements

OmniAb cautions you that statements contained in this report regarding matters that are not historical facts are forward-looking statements. The forward-looking statements are based on OmniAb’s current beliefs and expectations and include, but are not limited to, the expected timing and receipt of the teclistamab milestone payment and related recognition of revenue. Actual results may differ from those set forth in this report due to the risks and uncertainties inherent in OmniAb’s business, including, without limitation: OmniAb is dependent on Janssen for the commercialization of teclistimab and risks related to the receipt and actual timing of milestone payments from Janssen; and other risks described in OmniAb’s prior press releases and filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof, and OmniAb undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement, which is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.