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OmniAb (OABI) Institutional Ownership

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$4.79 +0.13 (+2.79%)
Closing price 04:00 PM Eastern
Extended Trading
$4.80 +0.01 (+0.19%)
As of 07:51 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for OmniAb (NASDAQ:OABI)

Current
Institutional Ownership
Percentage
72.08%
Number of
Institutional Buyers
(last 12 months)
34
Total
Institutional Inflows
(last 12 months)
$69.23M
Number of
Institutional Sellers
(last 12 months)
23
Total
Institutional Outflows
(last 12 months)
$6.38M
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OABI Institutional Buying and Selling by Quarter

OmniAb Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/22/2026State Street Corp2,133,549$5.25M0.0%+3.2%1.474%
9/9/2026Squarepoint Ops LLC35,357$87K0.0%+252.4%0.024%
8/20/2026Susquehanna International Group LLP35,691$88K0.0%-14.3%0.025%
8/20/2026Two Sigma Securities LLC15,726$39K0.0%N/A0.011%
8/20/2026Private Management Group Inc.2,344,770$5.77M0.2%-3.5%1.620%
8/17/2026Bank of America Corp DE149,493$368K0.0%N/A0.103%
8/14/2026ADAR1 Capital Management LLC947,412$2.33M0.1%N/A0.654%
8/14/2026Whitefort Capital Management LP10,248,658$25.21M0.0%N/A7.079%
8/14/2026Canada Pension Plan Investment Board15,100$37K0.0%N/A0.010%
8/14/2026Legal & General Group Plc11,284$28K0.0%N/A0.008%
8/14/2026The Manufacturers Life Insurance Company24,785$61K0.0%N/A0.017%
8/13/2026Connor Clark & Lunn Investment Management Ltd.72,357$178K0.0%N/A0.050%
8/7/2026BlackRock Inc.8,897,490$21.89M0.0%N/A6.145%
8/7/2026Deutsche Bank AG100,842$248K0.0%N/A0.070%
8/7/2026Rice Hall James & Associates LLC2,610,434$6.42M0.3%N/A1.803%
8/6/2026Bank of New York Mellon Corp318,406$783K0.0%N/A0.220%
5/19/2026Bank of America Corp DE121,656$191K0.0%+46.4%0.084%
5/15/2026Rice Hall James & Associates LLC2,547,255$4.00M0.2%+6.1%1.759%
5/14/2026Renaissance Technologies LLC269,600$423K0.0%+11.1%0.186%
5/14/2026Sei Investments Co.60,578$95K0.0%+41.3%0.042%
5/14/2026State of Wyoming24,694$39K0.0%+101.7%0.017%
5/7/2026Dimensional Fund Advisors LP1,745,248$2.74M0.0%-18.9%1.205%
4/30/2026Isthmus Partners LLC756,674$1.19M0.1%+4.9%0.523%
2/19/2026Invesco Ltd.136,309$252K0.0%+9.9%0.095%
2/18/2026Millennium Management LLC673,395$1.25M0.0%+135.6%0.468%
2/18/2026Boothbay Fund Management LLC47,596$88K0.0%N/A0.033%
2/18/2026Bridgeway Capital Management LLC198,900$368K0.0%+29.2%0.138%
2/17/2026ADAR1 Capital Management LLC702,190$1.30M0.1%-35.6%0.488%
2/17/2026Cadian Capital Management LP4,434,954$8.21M0.6%+20.7%3.081%
2/17/2026Public Employees Retirement System of Ohio15,321$28K0.0%-84.1%0.011%
2/17/2026Rice Hall James & Associates LLC2,401,088$4.44M0.2%-0.5%1.668%
2/16/2026Squarepoint Ops LLC20,326$38K0.0%-42.6%0.014%
2/16/2026Barclays PLC165,557$306K0.0%+15.2%0.115%
2/13/2026The Manufacturers Life Insurance Company 28,943$54K0.0%N/A0.020%
2/13/2026Charles Schwab Investment Management Inc.966,026$1.79M0.0%+23.0%0.671%
2/13/2026State Street Corp2,048,996$3.79M0.0%-2.2%1.423%
2/13/2026Wells Fargo & Company MN125,636$232K0.0%+55.9%0.087%
2/12/2026Jane Street Group LLC135,378$250K0.0%-28.4%0.094%
2/12/2026MetLife Investment Management LLC36,552$68K0.0%-35.5%0.025%
2/12/2026Renaissance Technologies LLC242,700$449K0.0%-53.6%0.169%
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2/12/2026Dimensional Fund Advisors LP2,152,593$3.98M0.0%-15.5%1.495%
2/12/2026Arbiter Partners Capital Management LLC192,585$356K0.2%+20.0%0.134%
2/12/2026Private Management Group Inc.2,420,478$4.48M0.1%-3.9%1.681%
2/10/2026Goldman Sachs Group Inc.540,277$1M0.0%-8.1%0.375%
2/10/2026Intech Investment Management LLC37,820$70K0.0%-25.2%0.026%
2/9/2026Geode Capital Management LLC2,722,692$5.04M0.0%+17.0%1.891%
2/5/2026Isthmus Partners LLC721,309$1.33M0.1%+7.8%0.501%
2/4/2026Towerview LLC1,000,000$1.85M1.3%+20.3%0.695%
1/14/2026Woodstock Corp35,240$65K0.0%-90.0%0.024%
1/9/2026SG Americas Securities LLC23,141$43K0.0%+96.6%0.016%
1/1/2026JPMorgan Chase & Co.762,912$1.22M0.0%-3.9%0.530%
11/17/2025Jacobs Levy Equity Management Inc.1,006,256$1.61M0.0%-9.0%0.699%
11/17/2025Woodline Partners LP2,857,142$4.57M0.0%N/A1.985%
11/17/2025Millennium Management LLC285,801$457K0.0%-56.1%0.199%
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.43,448$70K0.0%-21.9%0.030%
11/17/2025Bank of America Corp DE48,030$77K0.0%-32.4%0.033%
11/17/2025Ameriprise Financial Inc.232,787$372K0.0%-16.8%0.162%
11/14/2025ADAR1 Capital Management LLC1,090,628$1.75M0.2%+234.4%0.758%
11/14/2025Two Sigma Investments LP291,735$467K0.0%+25.9%0.203%
11/14/2025Bridgeway Capital Management LLC153,900$246K0.0%+185.5%0.107%
11/14/2025Squarepoint Ops LLC35,431$57K0.0%+114.2%0.025%
11/14/2025Private Management Group Inc.2,518,279$4.03M0.1%-1.6%1.749%
11/13/2025Sei Investments Co.81,045$130K0.0%+32.6%0.056%
11/13/2025BNP Paribas Financial Markets21,721$35K0.0%+92.5%0.015%
11/12/2025Arbiter Partners Capital Management LLC160,529$257K0.2%N/A0.112%
11/12/2025Dimensional Fund Advisors LP2,548,284$4.08M0.0%-12.5%1.770%
11/12/2025Intech Investment Management LLC50,565$81K0.0%-13.2%0.035%
11/10/2025Cornerstone Capital Inc.109,211$175K0.0%-33.3%0.076%
11/10/2025Isthmus Partners LLC669,071$1.07M0.2%+17.8%0.465%
11/7/2025GSA Capital Partners LLP262,371$420K0.0%+902.4%0.182%
11/7/2025Vanguard Group Inc.5,148,061$8.24M0.0%-2.3%3.576%
11/7/2025JPMorgan Chase & Co.762,912$1.22M0.0%-3.9%0.530%
10/16/2025Rice Hall James & Associates LLC2,412,038$3.86M0.2%-8.2%1.675%
10/9/2025Voya Investment Management LLC19,496$31K0.0%-36.2%0.014%
10/7/2025Woodstock Corp351,753$563K0.0%-43.4%0.244%
9/26/2025Corient Private Wealth LLC30,253$53K0.0%N/A0.021%
9/4/2025Osaic Holdings Inc.14,247$25K0.0%+214.4%0.012%
8/15/2025Corient Private Wealth LLC30,253$53K0.0%N/A0.025%
8/15/2025Boothbay Fund Management LLC188,554$328K0.0%-50.1%0.154%
8/15/2025Bridgeway Capital Management LLC53,900$94K0.0%N/A0.044%
8/15/2025Brevan Howard Capital Management LP53,779$94K0.0%N/A0.044%
8/15/2025Bank of America Corp DE71,031$124K0.0%-86.9%0.058%
8/15/2025Ameriprise Financial Inc.279,789$487K0.0%+854.6%0.229%
8/14/2025Kent Lake PR LLC1,750,000$3.05M1.4%+677.8%1.433%
8/14/2025Jane Street Group LLC153,736$268K0.0%+90.3%0.126%
8/14/2025Murchinson Ltd.502,810$875K0.3%-50.1%0.412%
8/14/2025The Manufacturers Life Insurance Company 44,809$78K0.0%+20.5%0.037%
8/14/2025Sei Investments Co.61,126$106K0.0%+166.5%0.050%
8/14/2025Cerity Partners LLC22,612$39K0.0%+111.5%0.019%
8/13/2025Marshall Wace LLP359,665$626K0.0%N/A0.294%
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8/13/2025Invesco Ltd.109,613$191K0.0%+17.0%0.090%
8/13/2025Isthmus Partners LLC568,043$988K0.1%+21.2%0.465%
8/12/2025Cornerstone Capital Inc.163,762$285K0.0%-4.8%0.134%
8/12/2025XTX Topco Ltd137,171$239K0.0%+156.5%0.112%
8/12/2025Private Management Group Inc.2,558,045$4.45M0.1%+1.1%2.094%
8/12/2025Rhumbline Advisers160,728$280K0.0%+6.0%0.132%
8/12/2025JPMorgan Chase & Co.793,734$1.38M0.0%+28.3%0.650%
8/8/2025Intech Investment Management LLC58,224$101K0.0%-43.2%0.048%
8/8/2025Geode Capital Management LLC2,439,424$4.25M0.0%-0.9%1.997%
8/6/2025Towerview LLC831,100$1.45M1.0%+43.3%0.680%


OABI Institutional Ownership - Frequently Asked Questions

During the previous two years, 99 institutional investors and hedge funds held shares of OmniAb. The most heavily invested institutionals were Janus Henderson Group PLC ($28.18M), Whitefort Capital Management LP ($25.21M), BlackRock Inc. ($21.89M), Vanguard Group Inc. ($8.24M), Cadian Capital Management LP ($8.21M), Rice Hall James & Associates LLC ($6.42M), and Chicago Capital LLC ($6.29M).Learn more on OmniAb's institutional investors.

72.08% of OmniAb's stock is owned by institutional investors. Learn more on OABI's institutional investor holdings.

Of the 78 institutional investors that purchased OmniAb's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Whitefort Capital Management LP ($10.25M), BlackRock Inc. ($8.90M), Rice Hall James & Associates LLC ($2.92M), Woodline Partners LP ($2.86M), ADAR1 Capital Management LLC ($1.71M), Kent Lake PR LLC ($1.53M), and JPMorgan Chase & Co. ($1.03M).

Institutional investors have bought a total of 30,298,829 shares in the last 24 months. This purchase volume represents approximately $69.23M in transactions.

Of the 22 institutional investors that sold OmniAb's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Dimensional Fund Advisors LP ($1.17M), ADAR1 Capital Management LLC ($388.44K), Millennium Management LLC ($364.52K), Woodstock Corp ($316.51K), Renaissance Technologies LLC ($280.75K), Rice Hall James & Associates LLC ($226.04K), and Private Management Group Inc. ($221.96K).

Institutional investors have sold a total of 3,674,292 shares in the last 24 months. This volume of shares sold represents approximately $6.38M in transactions.


Related Companies

Institutional ownership data for NASDAQ:OABI is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/22/2026. New 13F filings are added each quarter as they're published.
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