Core Laboratories's top three insider shareholders as of March 23, 2026 are Lawrence Bruno (Chairman And Ceo, 370.12K shares), Christopher Scott Hill (Svp Cfo, 142.35K shares), Gwendolyn Gresham (Svp, 52.53K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Lawrence Bruno | Chairman And Ceo | 370,119 | 0 | 05 Jan, 2026 |
| Christopher Scott Hill | Svp Cfo | 142,354 | 0 | 05 Jan, 2026 |
| Gwendolyn Gresham | Svp | 52,527 | 0 | 05 Jan, 2026 |
| Martha Z. Carnes | 46,328 | 0 | 02 Apr, 2025 | |
| Harvey Robert Klingensmith | 41,962 | 0 | 02 Apr, 2025 | |
| Mark Damian Tattoli | Svp, Gen Counsel Secretary | 41,671 | 0 | 05 Jan, 2026 |
| Michael Straughen | 29,186 | 0 | 02 Apr, 2025 | |
| Kwaku Temeng | 25,528 | 0 | 02 Apr, 2025 | |
| Katherine Murray | 21,221 | 0 | 02 Apr, 2025 | |
| Kevin Daniels | Cao Treasurer | 13,115 | 0 | 08 Jan, 2024 |
| Sow Hang Teo | Cao Treasurer | 8,765 | 0 | 02 Dec, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 12 Feb, 2026 | Gwendolyn Gresham | Performance Shares | A | 33,490 | $0.00 | 33,490 | D | A |
| 12 Feb, 2026 | Sow Hang Teo | Performance Shares | A | 7,526 | $0.00 | 7,526 | D | A |
| 12 Feb, 2026 | Lawrence Bruno | Performance Shares | A | 204,340 | $0.00 | 204,340 | D | A |
| 12 Feb, 2026 | Mark Damian Tattoli | Performance Shares | A | 33,490 | $0.00 | 33,490 | D | A |
| 12 Feb, 2026 | Christopher Scott Hill | Performance Shares | A | 70,008 | $0.00 | 70,008 | D | A |
| 31 Dec, 2025 | Gwendolyn Gresham | Common Stock | D | 19,301 | $16.03 | 33,226 | D | F |
| 31 Dec, 2025 | Lawrence Bruno | Common Stock | D | 112,681 | $16.03 | 257,438 | D | F |
| 31 Dec, 2025 | Mark Damian Tattoli | Common Stock | D | 14,310 | $16.03 | 27,361 | D | F |
| 31 Dec, 2025 | Christopher Scott Hill | Common Stock | D | 32,152 | $16.03 | 110,202 | D | F |
| 31 Dec, 2025 | Mark Damian Tattoli | Common Stock | A | 24,952 | $0.00 | 41,671 | D | M |
| 31 Dec, 2025 | Gwendolyn Gresham | Common Stock | A | 24,952 | $0.00 | 52,527 | D | M |
| 31 Dec, 2025 | Lawrence Bruno | Common Stock | A | 180,722 | $0.00 | 370,119 | D | M |
| 31 Dec, 2025 | Christopher Scott Hill | Common Stock | A | 61,417 | $0.00 | 142,354 | D | M |
| 31 Dec, 2025 | Christopher Scott Hill | Performance Shares | D | 61,417 | $0.00 | 0 | D | M |
| 31 Dec, 2025 | Gwendolyn Gresham | Performance Shares | D | 24,952 | $0.00 | 0 | D | M |
| 31 Dec, 2025 | Lawrence Bruno | Performance Shares | D | 180,722 | $0.00 | 0 | D | M |
| 31 Dec, 2025 | Mark Damian Tattoli | Performance Shares | D | 24,952 | $0.00 | 0 | D | M |
| 01 Dec, 2025 | Sow Hang Teo | Common Stock | D | 340 | $15.39 | 8,425 | D | F |
| 01 Dec, 2025 | Sow Hang Teo | Common Stock | A | 864 | $0.00 | 8,765 | D | M |
| 01 Dec, 2025 | Sow Hang Teo | Restricted Shares | D | 864 | $0.00 | 6,690 | D | M |