Core Laboratories
CLB
190 hedge funds and large institutions have $633M invested in Core Laboratories in 2025 Q3 according to their latest regulatory filings, with 28 funds opening new positions, 64 increasing their positions, 73 reducing their positions, and 28 closing their positions.
68% more call options, than puts
Call options by funds: $528K | Put options by funds: $314K
5% more capital invested
Capital invested by funds: $601M → $633M (+$31.7M)
0% more first-time investments, than exits
New positions opened: 28 | Existing positions closed: 28
1% less funds holding
Funds holding: 191 → 190 (-1)
2.1% less ownership
Funds ownership: 111.31% → 109.21% (-2.1%)
12% less repeat investments, than reductions
Existing positions increased: 64 | Existing positions reduced: 73
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AI
Ariel Investments
Chicago,
Illinois
|
+$9.34M |
| 2 |
DGI
Disciplined Growth Investors
Minneapolis,
Minnesota
|
+$6.2M |
| 3 |
HF
HRT Financial
New York
|
+$3.04M |
| 4 |
Goldman Sachs
New York
|
+$2.05M |
| 5 |
D.E. Shaw & Co
New York
|
+$1.74M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
-$16.8M |
| 2 |
FAM
Fred Alger Management
New York
|
-$6.27M |
| 3 |
RA
Royce & Associates
New York
|
-$3.89M |
| 4 |
State Street
Boston,
Massachusetts
|
-$2.18M |
| 5 |
EARNEST Partners
Atlanta,
Georgia
|
-$2.06M |
CLB Hedge Fund Activity: Q3 2025 in Review
190 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Core Laboratories (CLB) for Q3 2025, worth a combined $633M — up 5.3% from $601M a quarter earlier.
Fund positioning in CLB was balanced in Q3 2025: 28 funds opened new positions, 28 closed out, 64 added to existing stakes and 73 trimmed.
The largest buyer was Ariel Investments, adding an estimated $9.34M. The largest seller was Vanguard Group, cutting an estimated $16.8M.
- 190 institutional investors held Core Laboratories (CLB) as of Q3 2025, down from 191 in Q2 2025.
- Funds reported $633M of Core Laboratories stock for Q3 2025, up 5.3% quarter-over-quarter.
- 28 funds opened new Core Laboratories positions in Q3 2025 and 28 closed out, a net change of 0 holders.
- The largest Core Laboratories buyer in Q3 2025 was Ariel Investments, an estimated $9.34M added.
- The largest Core Laboratories seller in Q3 2025 was Vanguard Group, an estimated $16.8M sold.
Based on aggregated 13F filings for Q3 2025.