OmniAb, Inc. (OABI) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: May 07, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares
Recent Dilution: 21.83% (2 years)
Historical Dilution Factor: moderate recent dilution
Outstanding Shares
140M
Potential Supply
0
Additional shares possible
Splits
None
Past 2 years

Summary

OABI currently has 145M outstanding shares. with minimal authorized share overhang for future dilution. The company has diluted shareholders by 21.83% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 07, 2026

10-Q filing | 145.0M shares outstanding

140M 0
Nov 04, 2025

10-Q filing | 144.0M shares outstanding

140M 0
Sep 12, 2025

S-3 filing: This is an S-3 filing for the resale of 21,254,106 shares of common stock by selling stockholders, originally issued in a private placement on August 26, 2025.

120M 0
Aug 06, 2025

10-Q filing | 122.7M shares outstanding

120M 0
May 08, 2025

10-Q filing | 122.3M shares outstanding

120M 0
Mar 18, 2025

10-K filing | 122.1M shares outstanding

120M 0
Nov 12, 2024

10-Q filing | 121.0M shares outstanding

120M 0
Aug 08, 2024

10-Q filing | 118.2M shares outstanding

120M 0
May 09, 2024

10-Q filing | 117.6M shares outstanding

120M 0
Mar 25, 2024

10-K filing | 117.1M shares outstanding

120M 0
Dec 08, 2023

S-3 filing: The company is filing an S-3 to offer and sell up to $300 million in the aggregate of common stock, preferred stock, and debt securities from time to time in one or more offerings.

120M 0
Dec 08, 2023

POS AM filing: This is a POS AM filing for OmniAb, Inc. registering up to 36,304,385 shares of common stock, up to 11,345,489 warrants, and up to 19,012,156 shares of common stock issuable upon exercise of warrants for resale by selling securityholders and issuance by the company.

120M 0
Nov 09, 2023

10-Q filing | 116.2M shares outstanding

120M 0
Aug 10, 2023

10-Q filing | 116.2M shares outstanding

120M 0
May 11, 2023

10-Q filing | 115.6M shares outstanding

120M 0
May 05, 2023

POS AM filing: This is a POS AM filing by OmniAb, Inc. registering for resale shares of common stock and warrants held by selling securityholders, as well as registering shares of common stock issuable upon exercise of warrants and options.

120M 0
Mar 30, 2023

10-K filing | 115.6M shares outstanding

120M 5.5M
Feb 07, 2023

S-1/A filing: This S-1/A filing relates to the issuance by OmniAb, Inc. of up to 24,273,938 shares of common stock, and the offer and resale from time to time by the selling securityholders of up to 36,450,645 shares of Common Stock and up to 11,345,489 of the Private Placement Warrants.

120M 6M
Jan 05, 2023

S-1/A filing: S-1/A filing for OmniAb, Inc. registering for resale up to 36,345,645 shares of common stock and 11,345,489 warrants by selling securityholders, and up to 24,273,938 shares of common stock by the company.

120M 0
Nov 30, 2022

S-1 filing: This S-1 filing is for the registration of 36,345,645 shares of common stock, 11,345,489 warrants, and 19,012,156 shares of common stock issuable upon exercise of warrants for resale by selling securityholders and for the issuance of shares upon exercise of options and warrants.

110M 18M
Nov 10, 2022

10-Q filing | 5.8M shares outstanding

5.8M 0
Oct 24, 2022

8-K filing: APAC Class A Ordinary Shares were redeemed at approximately $10.32 per share for an aggregate of $224,048,746.95. New OmniAb will issue additional shares and warrants to the Sponsor to backstop the Redemptions and issue additional shares and warrants in a private placement. ($325.78M proceeds)

5.8M 0
Aug 12, 2022

10-Q filing | 5.8M shares outstanding

5.8M 0
May 20, 2022

10-Q filing | 5.8M shares outstanding

5.8M 0
Mar 28, 2022

10-K filing | 5.3M shares outstanding

5.3M 0
Mar 24, 2022

8-K filing: Avista Public Acquisition Corp. II (APAC) entered into a merger agreement with Ligand Pharmaceuticals Incorporated and OmniAb, Inc. for a Reverse Morris Trust transaction, involving the distribution of OmniAb common stock to Ligand stockholders and subsequent merger with APAC. ($30.0M proceeds)

5.8M 0
Nov 10, 2021

10-Q filing | 5.8M shares outstanding

5.8M 0
Sep 23, 2021

10-Q filing | 5.8M shares outstanding

5.8M 0
Aug 18, 2021

8-K filing: Avista Public Acquisition Corp. II completed its initial public offering of 23,000,000 units at $10.00 per unit, generating gross proceeds of $230,000,000, and completed the private sale of 8,233,333 warrants to its sponsor at $1.50 per warrant, generating gross proceeds of $12,350,000. ($242.35M proceeds)

N/A 0
Aug 12, 2021

8-K filing: Avista Acquisition Corp II consummated its initial public offering of 23,000,000 units at a price of $10.00 per unit, generating gross proceeds of $230,000,000, and completed a private sale of 8,233,333 warrants to the Company's sponsor at a purchase price of $1.50 per warrant, generating gross proceeds of $12,350,000. ($242.35M proceeds)

N/A 0
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