Core Laboratories N.V.
Core Laboratories N.V. (CLB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CLB · as of Sep 30, 2025
Ownership Breakdown
195
Institutional Holders
▼ 2 vs Q2
$633.31M
Total Inst. Value
▲ $31.59M vs Q2
46.10M
Shares Outstanding
freeFloat 98.54%
51.25M
13F Shares Held
▼ 980,704 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CLB largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ARIEL INVESTMENTS, LLC oil & gas field services, nec | 13.77M | 28.99% | 28.99% | $170.24B | Nov 14, 2025 | ▲ 797.1K |
BLACKROCK, INC. oil & gas field services, nec | 7.26M | 15.28% | 15.28% | $89.71B | Nov 12, 2025 | ▼ 74.1K |
DISCIPLINED GROWTH INVESTORS INC /MN oil & gas field services, nec | 5.97M | 12.57% | 12.57% | $73.79B | Nov 14, 2025 | ▲ 529.0K |
EARNEST PARTNERS LLC oil & gas field services, nec | 3.43M | 7.21% | 7.21% | $42.37B | Nov 14, 2025 | ▼ 175.4K |
VANGUARD GROUP INC oil & gas field services, nec | 3.05M | 6.41% | 6.41% | $37.67B | Nov 7, 2025 | ▼ 1.43M |
STATE STREET CORP oil & gas field services, nec | 1.98M | 4.16% | 4.16% | $24.43B | Nov 14, 2025 | ▼ 185.9K |
DIMENSIONAL FUND ADVISORS LP oil & gas field services, nec | 1.11M | 2.34% | 2.34% | $13.73B | Nov 12, 2025 | ▼ 58.4K |
GEODE CAPITAL MANAGEMENT, LLC oil & gas field services, nec | 1.11M | 2.33% | 2.33% | $13.68B | Nov 12, 2025 | ▼ 8.1K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. oil & gas field services, nec | 908.2K | 1.91% | 1.91% | $11.22B | Nov 14, 2025 | ▲ 33.1K |
FISHER ASSET MANAGEMENT, LLC oil & gas field services, nec | 824.6K | 1.74% | 1.74% | $10.19B | Nov 12, 2025 | ▼ 43.1K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+2.68M shares0
New Positions
first time holders24
Decreased
−2.84M shares0
Sold Out
fully exitedNet shares change (top 50)
153.2K
+2.68M / −2.84M
Net new holders
+0
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CLB insider trading · insider activity
Source: SEC Form 4
3
Buy transactions
6
Sell transactions
0.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Tattoli Mark Damian SVP, Gen Counsel & Secretary | May 1, 2026 | Tax Withhold | 97 | $14.07 | $1.4K | 27.5K | Form 4 ↗ |
Murray Katherine director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
ANASTASIO CURT director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
Klingensmith Harvey Robert director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
Temeng Kwaku director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
MARTINOVICH ROBERT F director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
Carnes Martha Z. director | Apr 1, 2026 | Award | 7,895 | — | — | 7.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Core Laboratories N.V. (CLB) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 1.46%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Core Laboratories N.V. is ARIEL INVESTMENTS, LLC, holding approximately 13.77 million shares — equal to 28.99% of outstanding shares — as of September 30, 2025.
A total of 195 institutional investors currently hold CLB stock, with a combined institutional value of approximately $633,306,048 as of the most recent 13F filing period.
Frequently asked questions
CLB ownershipCore Laboratories N.V. (CLB) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is ARIEL INVESTMENTS, LLC with a 28.99% stake. Company insiders hold 1.46%. Data sourced from SEC Form 13F as of September 30, 2025.