# EDGAR Filing Document

**Accession Number:** 0001846253
**File Stem:** 0001846253-26-000031
**Filing Date:** 2026-4
**Character Count:** 1329
**Document Hash:** 735a4a23fdf928f8ab8696f8f95862c7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001846253-26-000031.hdr.sgml**: 20260429

**ACCESSION NUMBER**: 0001846253-26-000031

**CONFORMED SUBMISSION TYPE**: ARS

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260429

**DATE AS OF CHANGE**: 20260429

**EFFECTIVENESS DATE**: 20260429

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OmniAb, Inc.
- **CENTRAL INDEX KEY:** 0001846253
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ARS
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40720
- **FILM NUMBER:** 26916477

**BUSINESS ADDRESS:**
- **STREET 1:** 5980 HORTON STREET
- **STREET 2:** SUITE 600
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608
- **BUSINESS PHONE:** 510-250-7800

**MAIL ADDRESS:**
- **STREET 1:** 5980 HORTON STREET
- **STREET 2:** SUITE 600
- **CITY:** EMERYVILLE
- **STATE:** CA
- **ZIP:** 94608

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Avista Public Acquisition Corp. II
- **DATE OF NAME CHANGE:** 20210212

### Attached PDF Documents

**Attachment 1:** `a2025arsa.pdf`

_No text found in this document._