# EDGAR Filing Document

**Accession Number:** 0001846253
**File Stem:** 0001193125-25-206138
**Filing Date:** 2025-9
**Character Count:** 2416
**Document Hash:** 8dd9bca1a3d7e281487e1e969330320e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-206138.hdr.sgml**: 20251209

**ACCESSION NUMBER**: 0001193125-25-206138

**CONFORMED SUBMISSION TYPE**: CORRESP

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250917

**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:** CORRESP

**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

**OmniAb, Inc.** 

**5980 Horton Street, Suite 600** 

**Emeryville, California 94608** 

September 17, 2025

**<u>VIA EDGAR</u>**

Robert Augustin

Office of Industrial Applications and Services

Division of Corporation Finance

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

---

| | |
|:---|:---|
| **Re:** | **OmniAb, Inc.**  |

---

**Registration Statement on Form S-3**

**File No. 333-290215**

To the addressee set forth above:

Pursuant to Rule 461 of Regulation C of the General Rules and Regulations under the Securities Act of 1933, as amended, the undersigned, on behalf of OmniAb, Inc., respectfully requests that the effective date of the Registration Statement on Form S-3 referred to above be accelerated so that it will become effective at 4:00 P.M. Eastern Time on September 19, 2025, or as soon as practicable thereafter.

If you have any questions or require additional information, please contact Anthony Gostanian of Latham & Watkins LLP at (858) 523-3969. Thank you for your assistance and cooperation in this matter.

---

| | |
|:---|:---|
| Sincerely, | Sincerely, |
| OMNIAB, INC. | OMNIAB, INC. |
| By: | /s/ Kurt Gustafson |
|  | Kurt Gustafson |
|  | Chief Financial Officer |

---

cc: Matthew W. Foehr, *OmniAb, Inc.*

Charles Berkman, *OmniAb, Inc.*

Matthew T. Bush, *Latham & Watkins LLP*