OGN · Organon & Co. · Shareholders & Ownership
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Every disclosed holder of OGN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns OGN
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 222,680,086 | 84.79% |
| Insiders (Forms 3, 4, 5) | 1,251,973 | 0.48% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 38,689,525 | 14.73% |
| Registered funds (N-PORT, not summed) | 81,331,555 | 30.97% |
Shares outstanding: 262,621,584, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of OGN
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
32,056,866 | ||
| 1.1 |
iShares Core S&P Small-Cap ETF
Fund
S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
15,821,742 | ||
| 1.2 |
iShares S&P Small-Cap 600 Value ETF
Fund
S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
2,260,749 | ||
| 1.3 |
iShares Russell Mid-Cap ETF
Fund
S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,114,155 | ||
| 1.4 |
iShares U.S. Pharmaceuticals ETF
Fund
S000009417 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
683,028 | ||
| 1.5 |
iShares Russell 1000 Value ETF
Fund
S000004345 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
585,710 | ||
| 2 |
Pentwater Capital Management LP
13F
CIK 1425851 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
18,100,000 | ||
| 2.1 |
Pentwater Capital Management LP
13G
CIK 1425851 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
18,100,000 | ||
| 3 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,132,118 | ||
| 3.1 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13G
CIK 2100121 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
15,161,710 | ||
| 4 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
11,909,865 | ||
| 5 |
FIL Ltd
13F
CIK 318989 · Non-US institution · Sep 30, 2026
|
10,504,377 | ||
| 6 |
STATE STREET CORP
13F
CIK 93751 · Bank · Sep 30, 2026
|
9,759,303 | ||
| 6.1 |
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund
S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
2,417,312 | ||
| 6.2 |
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund
S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
1,366,698 | ||
| 6.3 |
State Street(R) SPDR(R) S&P(R) Pharmaceuticals ETF
Fund
S000012321 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
488,626 | ||
| 6.4 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
94,135 | ||
| 6.5 |
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund
S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
50,671 | ||
| 7 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
8,332,789 | ||
| 8 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
6,024,699 | ||
| 9 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,199,002 | ||
| 9.1 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
14,795 | ||
| 9.2 |
Goldman Sachs MarketBeta(R) Russell 1000 Value Equity ETF
Fund
S000083006 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
2,920 | ||
| 9.3 |
Goldman Sachs JUST U.S. Large Cap Equity ETF
Fund
S000061377 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
2,792 | ||
| 10 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,754,671 | ||
| 10.1 |
AB All Market Total Return Portfolio
Fund
S000010512 · Registered fund · Jun 30, 2026
AB PORTFOLIOS, not summed
|
74,519 | ||
| 11 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Sep 30, 2026
|
4,642,311 | ||
| 12 |
UBS Group AG
13F
CIK 1610520 · Bank · Sep 30, 2026
|
4,450,913 | ||
| 13 |
Man Group plc
13F
CIK 1637460 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,180,500 | ||
| 14 |
AQR Arbitrage LLC
13F
CIK 1167456 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,880,354 | ||
| 15 |
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund
S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
3,815,001 | ||
| 16 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,457,262 | ||
| 16.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
1,246,274 | ||
| 16.2 |
Schwab Fundamental U.S. Large Company ETF
Fund
S000040877 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
1,016,875 | ||
| 16.3 |
Schwab Fundamental U.S. Large Company Index Fund
Fund
S000016766 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
491,060 | ||
| 16.4 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
155,900 | ||
| 16.5 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
155,644 | ||
| 17 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,442,430 | ||
| 18 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Sep 30, 2026
|
3,258,845 | ||
| 18.1 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
667,484 | ||
| 18.2 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
586,753 | ||
| 18.3 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
388,330 | ||
| 18.4 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
130,585 | ||
| 18.5 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
105,250 | ||
| 19 |
Capula Management Ltd
13F
CIK 1557017 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,049,207 | ||
| 20 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
3,010,255 | ||
| 21 |
NEXPOINT ASSET MANAGEMENT, L.P.
13F
CIK 1469877 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,009,630 | ||
| 21.1 |
Nexpoint Merger Arbitrage Fund
Fund
S000054634 · Registered fund · Jun 30, 2026
NexPoint Funds I, not summed
|
2,705,080 | ||
| 21.2 |
NexPoint Event Driven Fund
Fund
S000021242 · Registered fund · Jun 30, 2026
NexPoint Funds I, not summed
|
171,820 | ||
| 22 |
Magnetar Financial LLC
13F
CIK 1352851 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,810,019 | ||
| 23 |
GLAZER CAPITAL, LLC
13F
CIK 1076809 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,745,000 | ||
| 24 |
KAHN BROTHERS GROUP INC
13F
CIK 1039565 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,670,523 | ||
| 25 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,202,199 | ||
| 25.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
174 | ||
| 26 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Sep 30, 2026
|
2,197,194 | ||
| 27 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,196,642 | ||
| 28 |
Kryger Capital LLC
13F
CIK 2123957 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,152,693 | ||
| 29 |
Allianz Asset Management GmbH
13F
CIK 1535323 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,093,459 | ||
| 29.1 |
PIMCO RAE US Small Fund
Fund
S000048957 · Registered fund · Jun 30, 2026
PIMCO Equity Series, not summed
|
515,461 | ||
| 29.2 |
PIMCO Global Core Asset Allocation Fund
Fund
S000023224 · Registered fund · Jun 30, 2026
PIMCO FUNDS, not summed
|
31,500 | ||
| 29.3 |
PIMCO Global Managed Asset Allocation Portfolio
Fund
S000024339 · Registered fund · Jun 30, 2026
PIMCO VARIABLE INSURANCE TRUST, not summed
|
28,100 | ||
| 29.4 |
PIMCO Inflation Response Multi-Asset Fund
Fund
S000033597 · Registered fund · Jun 30, 2026
PIMCO FUNDS, not summed
|
22,900 | ||
| 29.5 |
PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF
Fund
S000057225 · Registered fund · Jun 30, 2026
PIMCO Equity Series, not summed
|
15,041 | ||
| 30 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,080,508 | ||
| 30.1 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
45,504 | ||
| 30.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
23,564 | ||
| 31 |
Westchester Capital Management, LLC
13F
CIK 1512805 · Registered investment adviser · Sep 30, 2026
|
1,947,908 | ||
| 32 |
FMR LLC
13F
CIK 315066 · Holding company · Sep 30, 2026
|
1,905,091 | ||
| 32.1 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
1,282,304 | ||
| 32.2 |
Fidelity Mid Cap Index Fund
Fund
S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
991,694 | ||
| 32.3 |
Fidelity SAI Merger Arbitrage Fund
Fund
S000091043 · Registered fund · Jul 31, 2026
Fidelity Greenwood Street Trust, not summed
|
779,457 | ||
| 32.4 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
498,719 | ||
| 32.5 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
407,914 | ||
| 33 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,660,492 | ||
| 34 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Sep 30, 2026
|
1,643,589 | ||
| 34.1 |
Invesco S&P SmallCap 600 Revenue ETF
Fund
S000064596 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
599,412 | ||
| 34.2 |
Invesco RAFI US 1000 ETF
Fund
S000011995 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
310,057 | ||
| 34.3 |
Invesco S&P SmallCap Health Care ETF
Fund
S000028299 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
246,155 | ||
| 34.4 |
Invesco S&P Smallcap 600 Pure Value ETF
Fund
S000060800 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
233,218 | ||
| 34.5 |
Invesco Russell 1000 Equal Weight ETF
Fund
S000047524 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
55,891 | ||
| 35 |
TIG Advisors, LLC
13F
CIK 1358253 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,400,283 | ||
| 36 |
Squarepoint Ops LLC
13F
CIK 1642575 · Registered investment adviser · Sep 30, 2026
|
1,378,949 | ||
| 37 |
WATER ISLAND CAPITAL LLC
13F
CIK 1222765 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,374,899 | ||
| 37.1 |
AltShares Merger Arbitrage ETF
Fund
S000067196 · Registered fund · Aug 31, 2026
AltShares Trust, not summed
|
140,046 | ||
| 38 |
ALPINE ASSOCIATES MANAGEMENT INC.
13F
CIK 1396835 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,345,233 | ||
| 39 |
GABELLI FUNDS LLC
13F
CIK 1081407 · Registered investment adviser · Sep 30, 2026
|
1,330,460 | ||
| 39.1 |
The Gabelli ABC Fund
Fund
S000001070 · Registered fund · Jun 30, 2026
Gabelli Investor Funds Inc, not summed
|
239,500 | ||
| 39.2 |
Enterprise Mergers and Acquisitions Fund
Fund
S000017793 · Registered fund · Jun 30, 2026
Gabelli 787 Fund, Inc., not summed
|
33,750 | ||
| 39.3 |
Comstock Capital Value Fund
Fund
S000001057 · Registered fund · Jun 30, 2026
Comstock Funds, Inc., not summed
|
10,000 | ||
| 40 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Sep 30, 2026
|
1,245,982 | ||
| 40.1 |
SmallCap S&P 600 Index Fund
Fund
S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
193,477 | ||
| 40.2 |
SmallCap Value Fund II
Fund
S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
118,200 | ||
| 40.3 |
Global Multi-Strategy Fund
Fund
S000033960 · Registered fund · Aug 31, 2026
Principal Funds, Inc, not summed
|
68,998 | ||
| 40.4 |
MidCap Value Fund I
Fund
S000007173 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
5,894 | ||
| 41 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,245,588 | ||
| 42 |
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund
S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
|
1,231,414 | ||
| 43 |
The Merger Fund
Fund
S000005158 · Registered fund · Jun 30, 2026
Merger Fund, not summed
|
1,135,967 | ||
| 44 |
HSBC HOLDINGS PLC
13F
CIK 873630 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,078,134 | ||
| 45 |
VANGUARD HIGH DIVIDEND YIELD INDEX FUND
Fund
S000014011 · Registered fund · Jul 31, 2026
VANGUARD WHITEHALL FUNDS, not summed
|
1,052,879 | ||
| 46 |
Gotham Asset Management, LLC
13F
CIK 1510387 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,032,313 | ||
| 47 |
Cerity Partners LLC
13F
CIK 1566475 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,009,842 | ||
| 48 |
Polar Asset Management Partners Inc.
13F
CIK 1326389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
949,806 | ||
| 49 |
VANGUARD S&P SMALL-CAP 600 INDEX FUND
Fund
S000030017 · Registered fund · Aug 31, 2026
VANGUARD ADMIRAL FUNDS, not summed
|
944,925 | ||
| 50 |
Public Sector Pension Investment Board
13F
CIK 1396318 · Non-US institution · Sep 30, 2026
|
893,293 |
61 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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