# EDGAR Filing Document

**Accession Number:** 0001846253
**File Stem:** 0000000000-25-010074
**Filing Date:** 2025-9
**Character Count:** 2433
**Document Hash:** e5dfefd328ab7418b4311bc5798b4b2e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000000000-25-010074.hdr.sgml**: 20251209

**ACCESSION NUMBER**: 0000000000-25-010074

**CONFORMED SUBMISSION TYPE**: UPLOAD

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250916

**FILED FOR**: 

**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:** UPLOAD
- **SEC FILE NUMBER:** 333-290215

**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
**PUBLIC REFERENCE ACCESSION NUMBER**: 0001193125-25-202175

## Text-Extract

```

                                                           September 16, 2025

Matthew Foehr
President and Chief Executive Officer
OmniAb, Inc.
5980 Horton Street
Suite 600
Emeryville, CA 94608

       Re: OmniAb, Inc.
           Registration Statement on Form S-3
           Filed September 12, 2025
           File No. 333-290215
Dear Matthew Foehr:

       This is to advise you that we have not reviewed and will not review your
registration
statement.

        Please refer to Rules 460 and 461 regarding requests for acceleration.
We remind you
that the company and its management are responsible for the accuracy and
adequacy of their
disclosures, notwithstanding any review, comments, action or absence of action
by the staff.

       Please contact Robert Augustin at 202-551-8483 with any questions.

                                                           Sincerely,

                                                           Division of
Corporation Finance
                                                           Office of Industrial
Applications and
                                                           Services
cc:   Anthony A. Gostanian

```

### Attached PDF Documents

**Attachment 1:** `filename1`

_No text found in this document._