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Arthur J. Gallagher & Co

1,322 hedge funds and large institutions have $69.6B invested in Arthur J. Gallagher & Co in 2025 Q3 according to their latest regulatory filings, with 112 funds opening new positions, 503 increasing their positions, 484 reducing their positions, and 136 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less capital invested

Capital invested by funds: $ → $

less ownership

Funds ownership:

3% less funds holding

Funds holding: 1,3681,322 (-46)

18% less first-time investments, than exits

New positions opened: 112 | Existing positions closed: 136

30% less funds holding in top 10

Funds holding in top 10: 3726 (-11)

Holders
1,322
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
26
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$242M
Puts
$113M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
ACM
1351
AlphaStar Capital Management
North Carolina
Parallax Volatility Advisers
1352
Parallax Volatility Advisers
California
WG
1353
Winton Group
United Kingdom
IFU
1354
iSAM Funds (UK)
United Kingdom
DFCM
1355
Dark Forest Capital Management
Puerto Rico
Two Sigma Advisers
1356
Two Sigma Advisers
New York
Qube Research & Technologies (QRT)
1357
Qube Research & Technologies (QRT)
United Kingdom
SGI
1358
Summit Global Investments
Utah
DAS
1359
DMKC Advisory Services
Iowa
VF
1360
Virtu Financial
New York
AIC
1361
Anthracite Investment Company
Texas
QCM
1362
Qsemble Capital Management
New York
QC
1363
Quantessence Capital
New York
VWM
1364
VCI Wealth Management
Missouri
PEAK6
1365
PEAK6
Illinois
UBP
1366
Union Bancaire Privee
Switzerland
OTL
1367
Oak Thistle LLC
New York
KJHP
1368
K.J. Harrison & Partners
Ontario, Canada
SRL
1369
Scientech Research LLC
New Jersey
HIM
1370
Hanlon Investment Management
New Jersey
LCM
1371
Laurion Capital Management
New York
CWA
1372
Clarus Wealth Advisors
Arizona
MIM
1373
Morningstar Investment Management
Illinois
DTL
1374
Dynamic Technology Lab
Singapore
CFM
1375
Catalyst Funds Management
Australia