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.
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
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AI
Ariel Investments
Chicago,
Illinois
|
+$31.2M |
| 2 |
Millennium Management
New York
|
+$3.32M |
| 3 |
State Street
Boston,
Massachusetts
|
+$2.71M |
| 4 |
Dimensional Fund Advisors
Austin,
Texas
|
+$2.34M |
| 5 |
GJL
Gendell Jeffrey L
|
+$1.33M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
-$11.1M |
| 2 |
BTW
Boston Trust Walden
Boston,
Massachusetts
|
-$9.16M |
| 3 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$2.65M |
| 4 |
RA
Royce & Associates
New York
|
-$2.36M |
| 5 |
FAM
Fred Alger Management
New York
|
-$2.28M |
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.