OB Institutional Ownership & Shareholders
OUTBRAIN INC (OB) is currently held by 80 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $15.49M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Value Base Ltd. is currently the largest disclosed institutional shareholder of OB tracked by InsiderSet, reporting ownership valued at approximately $4.41M in its June 30, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 83% of the total disclosed OB value among the investors covered in this analysis. Major shareholders include Value Base Ltd., Whitefort Capital Management, Lp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in OUTBRAIN INC (OB).
This page ranks the largest institutional OB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
80
Total Reported Value
$15.49M
Largest Holder
Value Base Ltd.
Largest Position
$4.41M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
123
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Value Base Ltd. | 2.72% | 5,752,107 | $4,411,291 | — | — | — | |
| Whitefort Capital Management, Lp | 0.87% | 4,609,163 | $3,534,767 | — | — | — | |
| Vanguard Capital Management Llc | 0.00% | 1,582,009 | $1,213,401 | — | — | — | |
| Aqr Capital Management Llc | 0.00% | 1,041,321 | $798,590 | — | — | — | |
| Susquehanna International Group, Llp | 0.00% | 1,008,138 | $773,141 | — | — | — | |
| Blackrock, Inc. | 0.00% | 863,741 | $662,404 | — | — | — | |
| Gsa Capital Partners Llp | 0.03% | 561,120 | $430,000 | — | — | — | |
| Millennium Management Llc | 0.00% | 456,573 | $350,146 | — | — | — | |
| Bridgeway Capital Management, Llc | 0.01% | 449,901 | $345,029 | — | — | — | |
| Geode Capital Management, Llc | 0.00% | 404,687 | $310,423 | — | — | — | |
| Bank Of America Corp | 0.00% | 375,022 | $287,267 | — | — | — | |
| Empowered Funds, Llc | 0.00% | 319,401 | $244,949 | — | — | — | |
| Goldman Sachs Group Inc | 0.00% | 308,141 | $236,313 | — | — | — | |
| Partners Capital Investment Group, Llp | 0.01% | 209,407 | $160,594 | — | — | — | |
| Jane Street Group, Llc | 0.00% | 202,201 | $155,068 | — | — | — | |
| Vanguard Fiduciary Trust Co | 0.00% | 188,923 | $144,904 | — | — | — | |
| State Street Corp | 0.00% | 174,190 | $133,586 | — | — | — | |
| Two Sigma Investments, Lp | 0.00% | 161,058 | $123,515 | — | — | — | |
| Qube Research & Technologies Ltd | 0.00% | 125,832 | $96,501 | — | — | — | |
| Rbf Capital, Llc | 0.00% | 110,000 | $84,359 | — | — | — | |
| Point72 Asset Management, L.P. | 0.00% | 96,272 | $73,831 | — | — | — | |
| Ieq Capital, Llc | 0.00% | 83,451 | $63,999 | — | — | — | |
| Yelin Lapidot Holdings Management Ltd. | 0.01% | 79,959 | $61,321 | — | — | — | |
| Evergreen Capital Management Llc | 0.00% | 79,532 | $60,994 | — | — | — | |
| Jpmorgan Chase & Co | 0.00% | 65,620 | $52,305 | — | — | — | |
| Northern Trust Corp | 0.00% | 67,490 | $51,758 | — | — | — | |
| Barclays Plc | 0.00% | 66,240 | $50,799 | — | — | — | |
| Robertson Stephens Wealth Management, Llc | 0.00% | 58,198 | $44,632 | — | — | — | |
| Citadel Advisors Llc | 0.00% | 49,473 | $37,941 | — | — | — | |
| Hsbc Holdings Plc | 0.00% | 49,493 | $37,006 | — | — | — | |
| Cerity Partners Llc | 0.00% | 44,048 | $33,780 | — | — | — | |
| Mariner, Llc | 0.00% | 39,093 | $29,983 | — | — | — | |
| Fmr Llc | 0.00% | 38,980 | $29,894 | — | — | — | |
| Castleknight Management Lp | 0.00% | 35,011 | $26,850 | — | — | — | |
| Morgan Stanley | 0.00% | 31,640 | $24,265 | — | — | — | |
| Wealth Enhancement Advisory Services, Llc | 0.00% | 27,772 | $22,909 | — | — | — | |
| Mercer Global Advisors Inc | 0.00% | 26,179 | $20,077 | — | — | — | |
| Cwm, Llc | 0.00% | 30,240 | $19,916 | — | — | — | |
| Arax Advisory Partners | 0.00% | 22,979 | $17,622 | — | — | — | |
| Engineers Gate Manager Lp | 0.00% | 20,517 | $15,734 | — | — | — | |
| Abel Hall, Llc | 0.00% | 19,025 | $14,590 | — | — | — | |
| Jasper Ridge Partners, L.P. | 0.00% | 17,868 | $13,703 | — | — | — | |
| Callan Family Office, Llc | 0.00% | 17,514 | $13,431 | — | — | — | |
| Proficio Capital Partners Llc | 0.00% | 16,983 | $13,024 | — | — | — | |
| Smartharvest Portfolios, Llc | 0.00% | 16,417 | $12,590 | — | — | — | |
| Two Sigma Securities, Llc | 0.00% | 14,558 | $11,165 | — | — | — | |
| Captrust Financial Advisors | 0.00% | 14,454 | $11,085 | — | — | — | |
| Centiva Capital, Lp | 0.00% | 14,026 | $10,757 | — | — | — | |
| Vanguard Personalized Indexing Management, Llc | 0.00% | 13,152 | $10,086 | — | — | — | |
| Wealthcare Advisory Partners Llc | 0.00% | 13,052 | $10,010 | — | — | — |
Frequently asked questions about OB
Who are the largest institutional holders of OB?
The largest institutional holders of OB reported in the latest SEC Form 13F filings include Value Base Ltd., Whitefort Capital Management, Lp, Vanguard Capital Management Llc, Aqr Capital Management Llc, and Susquehanna International Group, Llp. InsiderSet ranks institutional holders by their latest reported OB position.
What is OB institutional ownership?
This page tracks OB positions reported by institutional investment managers through SEC Form 13F. OUTBRAIN INC (OB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own OB?
InsiderSet currently tracks 80 institutional managers reporting OB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of OB shareholders.
How much OB stock do institutions own?
Institutional investment managers disclosed approximately $15.49M in OB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was OB institutional ownership last updated?
The latest OB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional OB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its OB position after the reporting date.
Are institutions buying or selling OB?
Institutional buying and selling can be analyzed by comparing OB positions across consecutive 13F reporting periods. InsiderSet's OB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View OB ownership changes.
How has OB institutional ownership changed over time?
InsiderSet tracks OB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.