Who owns Organon (OGN)
Which tracked institutional funds hold OGN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OGN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on OGN is one-sided between 2026-Q1 and 2026-Q2: 160 added or opened and 54 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
OGN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes OGN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in OGN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 583 tracked filers holding OGN, 227 increased or opened the position and 317 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in OGN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 50
- Pentwater Capital Management LP$245M
- Man Group plc$57M
- AQR Arbitrage LLC$52M
- Capula Management Ltd$41M
- NEXPOINT ASSET MANAGEMENT, L.P.$41M
- Magnetar Financial LLC$38M
Full exits 36
- LSV ASSET MANAGEMENT$43M
- CANADA PENSION PLAN INVESTMENT BOARD$30M
- Think Investments LP$24M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/$10M
- Sio Capital Management, LLC$5M
- Bridgewater Associates, LP$4M
Largest adds
- BlackRock, Inc.$301M
- VANGUARD CAPITAL MANAGEMENT LLC$91M
- VANGUARD PORTFOLIO MANAGEMENT LLC$74M
- STATE STREET CORP$71M
- GOLDMAN SACHS GROUP INC$61M
- UBS Group AG$45M
Largest trims
- EverSource Wealth Advisors, LLC$42M
- TWO SIGMA INVESTMENTS, LP$16M
- NORGES BANK$9M
- CITADEL ADVISORS LLC$7M
- D. E. Shaw & Co., Inc.$6M
- Mitsubishi UFJ Trust & Banking Corp$5M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 32,056,866 | $434M | 16.1% | 2026-Q2 |
| Pentwater Capital Management LP new | 18,100,000 | $245M | 9.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 15,132,118 | $205M | 7.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 11,909,865 | $161M | 6.0% | 2026-Q2 |
| STATE STREET CORP trimmed | 9,659,371 | $131M | 4.8% | 2026-Q2 |
| KAHN BROTHERS GROUP INC | 5,536,993 | $33M | 1.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 5,199,002 | $70M | 2.6% | 2026-Q2 |
| UBS Group AG added | 4,856,529 | $66M | 2.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 4,815,610 | $65M | 2.4% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 4,754,671 | $28M | 1.1% | 2026-Q2 |
| Man Group plc added | 4,180,500 | $57M | 2.1% | 2026-Q2 |
| AQR Arbitrage LLC new | 3,880,354 | $52M | 1.9% | 2026-Q2 |
| PRIVATE MANAGEMENT GROUP INC trimmed | 3,742,161 | $51M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,457,262 | $47M | 1.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 3,442,430 | $47M | 1.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 3,266,826 | $44M | 1.6% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 3,099,481 | $42M | 1.6% | 2026-Q2 |
| Capula Management Ltd new | 3,049,207 | $41M | 1.5% | 2026-Q2 |
| NEXPOINT ASSET MANAGEMENT, L.P. new | 3,009,630 | $41M | 1.5% | 2026-Q2 |
| Magnetar Financial LLC added | 2,810,019 | $38M | 1.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 2,282,161 | $31M | 1.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 2,202,199 | $30M | 1.1% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 2,196,642 | $30M | 1.1% | 2026-Q2 |
| Kryger Capital LLC new | 2,152,693 | $29M | 1.1% | 2026-Q2 |
| Allianz Asset Management GmbH added | 2,093,459 | $28M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP added | 2,080,508 | $28M | 1.0% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 1,660,492 | $22M | 0.8% | 2026-Q2 |
| Invesco Ltd. trimmed | 1,643,187 | $22M | 0.8% | 2026-Q2 |
| Westchester Capital Management, LLC new | 1,426,578 | $19M | 0.7% | 2026-Q2 |
| TIG Advisors, LLC new | 1,400,283 | $19M | 0.7% | 2026-Q2 |
| WATER ISLAND CAPITAL LLC new | 1,374,899 | $19M | 0.7% | 2026-Q2 |
| ALPINE ASSOCIATES MANAGEMENT INC. new | 1,345,233 | $18M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 1,266,614 | $17M | 0.6% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 1,245,588 | $17M | 0.6% | 2026-Q2 |
| FMR LLC trimmed | 1,187,549 | $16M | 0.6% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 1,078,134 | $15M | 0.5% | 2026-Q2 |
| Gotham Asset Management, LLC trimmed | 1,032,313 | $14M | 0.5% | 2026-Q2 |
| Cerity Partners LLC trimmed | 1,009,842 | $14M | 0.5% | 2026-Q2 |
| GABELLI FUNDS LLC added | 954,910 | $13M | 0.5% | 2026-Q2 |
| Polar Asset Management Partners Inc. new | 949,806 | $13M | 0.5% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 902,195 | $12M | 0.5% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 837,305 | $11M | 0.4% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 828,133 | $11M | 0.4% | 2026-Q2 |
| Groupe la Francaise added | 775,382 | $10M | 0.4% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 743,270 | $10M | 0.4% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 742,009 | $10M | 0.4% | 2026-Q2 |
| BRANDES INVESTMENT PARTNERS, LP added | 729,502 | $10M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 718,753 | $10M | 0.4% | 2026-Q2 |
| TOKIO MARINE ASSET MANAGEMENT CO LTD new | 704,100 | $10M | 0.4% | 2026-Q2 |
| Sagefield Capital LP new | 701,857 | $10M | 0.4% | 2026-Q2 |
| Legal & General Group Plc trimmed | 669,375 | $9M | 0.3% | 2026-Q2 |
| P SCHOENFELD ASSET MANAGEMENT LP new | 667,400 | $9M | 0.3% | 2026-Q2 |
| Absolute Gestao de Investimentos Ltda. new | 665,230 | $9M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 663,233 | $9M | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 649,755 | $9M | 0.3% | 2026-Q2 |
| CREDIT INDUSTRIEL ET COMMERCIAL new | 584,944 | $8M | 0.3% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT added | 575,000 | $8M | 0.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 567,310 | $8M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 554,832 | $8M | 0.3% | 2026-Q2 |
| Centiva Capital, LP added | 554,800 | $8M | 0.3% | 2026-Q2 |
| GABELLI & Co INVESTMENT ADVISERS, INC. new | 548,700 | $7M | 0.3% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 538,388 | $7M | 0.3% | 2026-Q2 |
| Swiss National Bank added | 526,475 | $7M | 0.3% | 2026-Q2 |
| WINTON GROUP Ltd new | 509,862 | $7M | 0.3% | 2026-Q2 |
| FIRST MANHATTAN CO. LLC. trimmed | 504,647 | $7M | 0.3% | 2026-Q2 |
| New York Life Investment Management LLC new | 503,117 | $7M | 0.3% | 2026-Q2 |
| Verition Fund Management LLC added | 497,996 | $7M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 496,563 | $7M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 486,400 | $7M | 0.2% | 2026-Q2 |
| Alberta Investment Management Corp added | 450,000 | $6M | 0.2% | 2026-Q2 |
| Carmignac Gestion new | 448,606 | $6M | 0.2% | 2026-Q2 |
| Maven Securities LTD new | 434,200 | $6M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 421,790 | $6M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 408,184 | $6M | 0.2% | 2026-Q2 |
| LMR Partners LLP added | 396,842 | $5M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 392,268 | $5M | 0.2% | 2026-Q2 |
| First Trust Capital Management L.P. new | 390,939 | $5M | 0.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 390,745 | $5M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 390,232 | $5M | 0.2% | 2026-Q2 |
| NORGES BANK trimmed | 374,251 | $5M | 0.2% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP trimmed | 351,863 | $5M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 344,359 | $5M | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 318,314 | $4M | 0.2% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 315,858 | $4M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 300,215 | $4M | 0.2% | 2026-Q2 |
| Tidal Investments LLC added | 285,099 | $4M | 0.1% | 2026-Q2 |
| CM Management, LLC trimmed | 275,000 | $4M | 0.1% | 2026-Q2 |
| SECTOR GAMMA AS trimmed | 270,781 | $4M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 248,207 | $3M | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 241,392 | $3M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 239,671 | $3M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 239,262 | $3M | 0.1% | 2026-Q2 |
| PDT Partners, LLC trimmed | 230,275 | $3M | 0.1% | 2026-Q2 |
| 180 WEALTH ADVISORS, LLC trimmed | 226,383 | $3M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 221,647 | $3M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 218,888 | $3M | 0.1% | 2026-Q2 |
| Kintayl Capital LP new | 214,850 | $3M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 214,341 | $3M | 0.1% | 2026-Q2 |
| GFS Advisors, LLC new | 1,267 | $12M | 0.5% | 2026-Q2 |
| FORTRESS FINANCIAL GROUP, LLC new | 40 | $3M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.