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Core Laboratories
CLB

191 hedge funds and large institutions have $601M invested in Core Laboratories in 2025 Q2 according to their latest regulatory filings, with 28 funds opening new positions, 69 increasing their positions, 59 reducing their positions, and 31 closing their positions.

New
Increased
Maintained
Reduced
Closed

17% more repeat investments, than reductions

Existing positions increased: 69 | Existing positions reduced: 59

2.76% more ownership

Funds ownership: 108.55% → 111.31% (+2.8%)

10% less first-time investments, than exits

New positions opened: 28 | Existing positions closed: 31

2% less funds holding

Funds holding: 195 → 191 (-4)

21% less capital invested

Capital invested by funds: $762M → $601M (-$161M)

35% less call options, than puts

Call options by funds: $500K | Put options by funds: $766K

Holders
191
Holders Change
-4
Holders Change %
-2.05%
% of All Funds
2.51%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
28
Increased
69
Reduced
59
Closed
31
Calls
$500K
Puts
$766K
Net Calls
-$266K
Net Calls Change
-$100K

Top Buyers

Rank Fund Capital Flow
1
AI
Ariel Investments
Illinois
+$31.2M
2
Millennium Management
Millennium Management
New York
+$3.32M
3
State Street
State Street
Massachusetts
+$2.71M
4
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
+$2.34M
5
GJL
Gendell Jeffrey L
+$1.33M

Top Sellers

Rank Fund Capital Flow
1
Vanguard Group
Vanguard Group
Pennsylvania
-$11.1M
2
BTW
Boston Trust Walden
Massachusetts
-$9.16M
3
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
-$2.65M
4
RA
Royce & Associates
New York
-$2.36M
5
FAM
Fred Alger Management
New York
-$2.28M
Name Holding Trade Value Shares
Change 		Change in
Stake
A
101
AlphaQuest
New York
$185K +$159K +13,412 +504%
TRSOTSOK
102
Teachers Retirement System of the State of Kentucky
Kentucky
$177K – – –
VOYA Investment Management
103
VOYA Investment Management
Georgia
$161K +$2.23K +188 +1%
New York State Common Retirement Fund
104
New York State Common Retirement Fund
New York
$160K – – –
MSRPS
105
Maryland State Retirement & Pension System
Maryland
$157K – – –
ASRS
106
Arizona State Retirement System
Arizona
$157K +$1.92K +162 +1%
ECM
107
Everence Capital Management
Indiana
$155K +$159K +13,420 New
State Board of Administration of Florida Retirement System
108
State Board of Administration of Florida Retirement System
Florida
$154K – – –
AB
109
Amalgamated Bank
New York
$154K – – –
VPIM
110
Vanguard Personalized Indexing Management
California
$146K +$150K +12,684 New
LPL Financial
111
LPL Financial
California
$140K -$30.1K -2,536 -17%
COPPSERS
112
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$139K +$9.86K +831 +7%
IP
113
Isthmus Partners
Wisconsin
$137K +$5.03K +424 +4%
Amundi
114
Amundi
France
$134K -$188K -15,860 -60%
State of Tennessee, Department of Treasury
115
State of Tennessee, Department of Treasury
Tennessee
$132K – – –
PFSRSONJ
116
Police & Firemen's Retirement System of New Jersey
New Jersey
$128K – – –
Zurich Cantonal Bank
117
Zurich Cantonal Bank
Switzerland
$124K – – –
OPERF
118
Oregon Public Employees Retirement Fund
Oregon
$124K – – –
ProShare Advisors
119
ProShare Advisors
Maryland
$121K -$6.77K -571 -5%
VF
120
Virtu Financial
New York
$117K +$121K +10,166 New
Cerity Partners
121
Cerity Partners
New York
$117K -$36.8K -3,102 -23%
OC
122
Oppenheimer & Co
New York
$116K – – –
ISL
123
Ingalls & Snyder LLC
New York
$115K +$119K +10,000 New
SG Americas Securities
124
SG Americas Securities
New York
$103K -$98.4K -8,297 -48%
KK
125
KLP Kapitalforvaltning
Norway
$99.1K – – –
3 4
5
6 7

CLB Hedge Fund Activity: Q2 2025 in Review

191 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Core Laboratories (CLB) for Q2 2025, worth a combined $601M — down 21% from $762M a quarter earlier.

Sellers outnumbered buyers: 31 funds closed out of CLB and 28 opened new positions — a net loss of 3 holders — while 59 trimmed existing stakes and 69 added.

The largest buyer was Ariel Investments, adding an estimated $31.2M. The largest seller was Vanguard Group, cutting an estimated $11.1M.

  • 191 institutional investors held Core Laboratories (CLB) as of Q2 2025, down from 195 in Q1 2025.
  • Funds reported $601M of Core Laboratories stock for Q2 2025, down 21% quarter-over-quarter.
  • 28 funds opened new Core Laboratories positions in Q2 2025 and 31 closed out, a net change of -3 holders.
  • The largest Core Laboratories buyer in Q2 2025 was Ariel Investments, an estimated $31.2M added.
  • The largest Core Laboratories seller in Q2 2025 was Vanguard Group, an estimated $11.1M sold.

Based on aggregated 13F filings for Q2 2025.