SEC Form 4 · Updated Daily
CLB
— CORE LABORATORIES INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Bruno Lawrence | Director · Officer | 262,438 | 2026-07-31 | P |
| Hill Christopher Scott | Officer | 142,354 | 2025-12-31 | M |
| Carnes Martha Z. | Director | 54,397 | 2026-04-01 | M |
| Gresham Gwendolyn | Officer | 52,527 | 2025-12-31 | M |
| Klingensmith Harvey Robert | Director | 50,031 | 2026-04-01 | M |
| Temeng Kwaku | Director | 33,597 | 2026-04-01 | M |
| Murray Katherine | Director | 29,290 | 2026-04-01 | M |
| Straughen Michael | Director | 29,186 | 2025-04-01 | M |
| Tattoli Mark Damian | Officer | 27,763.621 | 2026-08-01 | M |
| ANASTASIO CURT | Director | 23,805 | 2026-04-01 | M |
| Teo Sow Hang | Officer | 8,625.334 | 2026-08-01 | M |
| MARTINOVICH ROBERT F | Director | 8,069 | 2026-04-01 | M |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-01 | Tattoli Mark Damian | Option exercise (derivative) | 250 | $0.00 | 950 |
| 2026-08-01 | Tattoli Mark Damian | Option exercise | 250 | $0.00 | 27,763.621 |
| 2026-08-01 | Tattoli Mark Damian | Tax withholding | 99 | $10.64 | 27,664.621 |
| 2026-08-01 | Teo Sow Hang | Option exercise (derivative) | 200 | $0.00 | 6,490 |
| 2026-08-01 | Teo Sow Hang | Option exercise (derivative) | 240 | $0.00 | 6,250 |
| 2026-08-01 | Teo Sow Hang | Option exercise | 200 | $0.00 | 8,625.334 |
| 2026-08-01 | Teo Sow Hang | Tax withholding | 90 | $10.64 | 8,535.334 |
| 2026-08-01 | Teo Sow Hang | Option exercise | 240 | $0.00 | 8,775.334 |
| 2026-08-01 | Teo Sow Hang | Tax withholding | 108 | $10.64 | 8,667.334 |
| 2026-07-31 | Bruno Lawrence | Open-market buy | 5,000 | $10.78 | 262,438 |
| 2026-05-01 | Tattoli Mark Damian | Option exercise (derivative) | 250 | $0.00 | 1,200 |
| 2026-05-01 | Tattoli Mark Damian | Option exercise | 250 | $0.00 | 27,610.621 |
| 2026-05-01 | Tattoli Mark Damian | Tax withholding | 97 | $14.07 | 27,513.621 |
| 2026-04-01 | Carnes Martha Z. | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | Carnes Martha Z. | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | Carnes Martha Z. | Option exercise | 8,069 | $0.00 | 54,397 |
| 2026-04-01 | MARTINOVICH ROBERT F | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | MARTINOVICH ROBERT F | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | MARTINOVICH ROBERT F | Option exercise | 8,069 | $0.00 | 8,069 |
| 2026-04-01 | Temeng Kwaku | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | Temeng Kwaku | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | Temeng Kwaku | Option exercise | 8,069 | $0.00 | 33,597 |
| 2026-04-01 | Klingensmith Harvey Robert | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | Klingensmith Harvey Robert | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | Klingensmith Harvey Robert | Option exercise | 8,069 | $0.00 | 50,031 |
| 2026-04-01 | ANASTASIO CURT | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | ANASTASIO CURT | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | ANASTASIO CURT | Option exercise | 8,069 | $0.00 | 23,805 |
| 2026-04-01 | Murray Katherine | Option exercise (derivative) | 8,069 | $0.00 | 0 |
| 2026-04-01 | Murray Katherine | Grant / award (derivative) | 7,895 | $0.00 | 7,895 |
| 2026-04-01 | Murray Katherine | Option exercise | 8,069 | $0.00 | 29,290 |
| 2026-02-12 | Teo Sow Hang | Grant / award (derivative) | 7,526 | $0.00 | 7,526 |
| 2026-02-12 | Bruno Lawrence | Grant / award (derivative) | 204,340 | $0.00 | 204,340 |
| 2026-02-12 | Hill Christopher Scott | Grant / award (derivative) | 70,008 | $0.00 | 70,008 |
| 2026-02-12 | Gresham Gwendolyn | Grant / award (derivative) | 33,490 | $0.00 | 33,490 |
| 2026-02-12 | Tattoli Mark Damian | Grant / award (derivative) | 33,490 | $0.00 | 33,490 |
| 2025-12-31 | Bruno Lawrence | Option exercise (derivative) | 180,722 | $0.00 | 0 |
| 2025-12-31 | Bruno Lawrence | Option exercise | 180,722 | $0.00 | 370,119 |
| 2025-12-31 | Bruno Lawrence | Tax withholding | 112,681 | $16.03 | 257,438 |
| 2025-12-31 | Hill Christopher Scott | Option exercise (derivative) | 61,417 | $0.00 | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.