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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
AI
276
Atria Investments
North Carolina
$149K +$137K +13,947 New
HT
277
Headlands Technologies
Illinois
$147K +$136K +13,809 New
HCMT
278
Highland Capital Management (Tennessee)
Tennessee
$147K -$981 -100 -0.7%
HWM
279
HB Wealth Management
Georgia
$146K +$26.9K +2,743 +25%
KF
280
Krilogy Financial
Missouri
$146K +$224K +22,873 New
ACG
281
Allen Capital Group
Nebraska
$146K +$18.6K +1,892 +16%
CGH
282
Crossmark Global Holdings
Texas
$143K – – –
RHAM
283
Round Hill Asset Management
California
$143K – – –
BP
284
Ballentine Partners
Massachusetts
$136K +$24.5K +2,496 +24%
SRC
285
Sage Rhino Capital
California
$134K +$123K +12,556 New
GWM
286
Greenwich Wealth Management
Connecticut
$134K +$23.5K +2,395 +24%
WFAG
287
Wescott Financial Advisory Group
Pennsylvania
$132K -$43.7K -4,452 -26%
Verition Fund Management
288
Verition Fund Management
Connecticut
$130K -$375K -38,185 -76%
ECM
289
Everence Capital Management
Indiana
$129K – – –
EC
290
EntryPoint Capital
New York
$127K +$9.09K +926 +8%
TCM
291
Triumph Capital Management
Colorado
$126K -$771K -78,515 -87%
Truist Financial
292
Truist Financial
North Carolina
$125K -$85.4K -8,705 -43%
MCC
293
Money Concepts Capital
Florida
$125K -$2.93K -299 -2%
SFA
294
Sequoia Financial Advisors
Ohio
$125K +$2.88K +293 +3%
CAM
295
Cresset Asset Management
Illinois
$125K – – –
GI
296
GAMCO Investors
Connecticut
$124K -$6.56K -668 -5%
SLAM
297
Swiss Life Asset Management
$123K +$113K +11,525 New
RC
298
Rexford Capital
Texas
$122K +$14.5K +1,480 +15%
PCA
299
Pallas Capital Advisors
Massachusetts
$120K +$110K +11,240 New
USCWA
300
U.S. Capital Wealth Advisors
Texas
$120K -$74.6K -7,597 -40%
10 11
12
13 14

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.