Avista Public Acquisition Corp. II operated as a special purpose acquisition company, established with the aim of completing a business combination with a firm in the healthcare sector. This entity, which was formed in 2021 and headquartered in New York, New York, successfully executed its intended acquisition. In late 2022, it finalized a merger with OmniAb, Inc., thereby fulfilling its primary mandate as an acquisition vehicle. Following this transaction, the combined enterprise now operates under the name OmniAb, Inc.