// company-profile
Core Laboratories N V
CLBSectorOil & Gas Field Services, NECInc.P7Filings6Insiders6
// api This Core Laboratories N V insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, Core Laboratories N V insiders bought $0 (20 transactions) and sold $1K (1 transaction).
- Most active insider: Tattoli Mark Damian with 3 transactions totaling $1K.
- Largest single sale: $1K by Tattoli Mark Damian on May 1, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Core Laboratories N V as of 2026-03-31
Total reported AUM
$792.2M
QoQ change
+19.7%
Reporting period
2026-03-31
#1
ARIEL INVESTMENTS, LLC
CIK 936753
$214.2M
12.8M shares
#2
BlackRock, Inc.
CIK 2012383
$86.4M
5.1M shares
#3
DISCIPLINED GROWTH INVESTORS INC /MN
CIK 1050442
$82.9M
4.9M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 1, 2026 | Tattoli Mark Damian | CLB | Tax Withholding | 97 | $14.07 | $1K |
| May 1, 2026 | Tattoli Mark Damian | CLB | Option Exercise | 250 | $0.00 | $0K |
| May 1, 2026 | Tattoli Mark Damian | CLB | Option Exercise | 250 | $0.00 | $0K |
| Apr 1, 2026 | Klingensmith Harvey Robert | CLB | Award | 7,895 | $0.00 | $0K |
| Apr 1, 2026 | Carnes Martha Z. | CLB | Option Exercise | 8,069 | $0.00 | $0K |
45 more transactions hidden
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