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Organon & Co
OGN

669 hedge funds and large institutions have $2.13B invested in Organon & Co in 2025 Q3 according to their latest regulatory filings, with 65 funds opening new positions, 159 increasing their positions, 233 reducing their positions, and 81 closing their positions.

New
Increased
Maintained
Reduced
Closed

3% more capital invested

Capital invested by funds: $2.07B → $2.13B (+$60.6M)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

6% less call options, than puts

Call options by funds: $33.2M | Put options by funds: $35.2M

4% less funds holding

Funds holding: 694 → 669 (-25)

5.28% less ownership

Funds ownership: 82.19% → 76.91% (-5.3%)

20% less first-time investments, than exits

New positions opened: 65 | Existing positions closed: 81

32% less repeat investments, than reductions

Existing positions increased: 159 | Existing positions reduced: 233

Holders
669
Holders Change
-25
Holders Change %
-3.6%
% of All Funds
8.78%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
65
Increased
159
Reduced
233
Closed
81
Calls
$33.2M
Puts
$35.2M
Net Calls
-$2.05M
Net Calls Change
-$14M

Top Buyers

1
Vanguard Group
Vanguard Group
Pennsylvania
+$35.8M
2
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board
Ontario, Canada
+$23.1M
3
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$11.1M
4
GAM
Gotham Asset Management
New York
+$9.89M
5
AQR Capital Management
AQR Capital Management
Connecticut
+$9.04M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
-$49.5M
2
Millennium Management
Millennium Management
New York
-$44.8M
3
UBS Group
UBS Group
Switzerland
-$31.3M
4
Nordea Investment Management
Nordea Investment Management
Sweden
-$17.8M
5
Morgan Stanley
Morgan Stanley
New York
-$13.6M
Name Holding Trade Value Shares
Change 		Change in
Stake
RTC
526
Riverview Trust Company
Washington
$790 – – –
PMFA
527
Plante Moran Financial Advisors
Michigan
$780 – – –
WPA
528
Wealth Preservation Advisors
Tennessee
$769 – – –
CAM
529
Creekmur Asset Management
Illinois
$758 -$10 -1 -1%
BGA
530
Battery Global Advisors
Massachusetts
$758 – – –
National Bank of Canada
531
National Bank of Canada
Quebec, Canada
$755 +$520 +53 +331%
RDFA
532
Ritter Daniher Financial Advisory
Ohio
$748 – – –
CPG
533
Cornerstone Planning Group
New Jersey
$727 -$29 -3 -9%
AWM
534
AllSquare Wealth Management
New York
$673 – – –
DAM
535
Delta Asset Management
Tennessee
$673 – – –
PB
536
Pinnacle Bancorp
Nebraska
$673 – – –
PAM
537
Palisade Asset Management
Minnesota
$663 +$608 +62 New
RF
538
Rossby Financial
Florida
$659 – – –
MFT
539
Moisand Fitzgerald Tamayo
Florida
$657 – – –
MSG
540
Main Street Group
Virginia
$641 – – –
MIM
541
MTM Investment Management
South Carolina
$630 – – –
IA
542
IFS Advisors
Kansas
$619 – – –
FWM
543
FSA Wealth Management
Massachusetts
$610 – – –
GEA
544
Glen Eagle Advisors
New Jersey
$609 +$118 +12 +27%
N
545
Natixis
France
$609 +$559 +57 New
BFS
546
Bare Financial Services
Pennsylvania
$598 -$491 -50 -47%
BSB
547
Bangor Savings Bank
Maine
$598 – – –
PS
548
Pinney & Scofield
Massachusetts
$598 – – –
LC
549
Lavaca Capital
Texas
$587 – – –
TFA
550
Transamerica Financial Advisors
Florida
$572 +$520 +53 +5,300%
20 21
22
23 24

OGN Hedge Fund Activity: Q3 2025 in Review

669 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Organon & Co (OGN) for Q3 2025, worth a combined $2.13B — up 2.9% from $2.07B a quarter earlier.

Sellers outnumbered buyers: 81 funds closed out of OGN and 65 opened new positions — a net loss of 16 holders — while 233 trimmed existing stakes and 159 added.

The largest buyer was Vanguard Group, adding an estimated $35.8M. The largest seller was Citadel Advisors, cutting an estimated $49.5M.

  • 669 institutional investors held Organon & Co (OGN) as of Q3 2025, down from 694 in Q2 2025.
  • Funds reported $2.13B of Organon & Co stock for Q3 2025, up 2.9% quarter-over-quarter.
  • 65 funds opened new Organon & Co positions in Q3 2025 and 81 closed out, a net change of -16 holders.
  • The largest Organon & Co buyer in Q3 2025 was Vanguard Group, an estimated $35.8M added.
  • The largest Organon & Co seller in Q3 2025 was Citadel Advisors, an estimated $49.5M sold.

Based on aggregated 13F filings for Q3 2025.