Over the 90-day window ending February 19, 2026, Core Laboratories's three dominant insider ownership positions are held by Chairman And Ceo Lawrence Bruno (370.12K shares), Svp & Cfo Christopher Scott Hill (142.35K shares), Svp Gwendolyn Gresham (52.53K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Lawrence Bruno | Chairman And Ceo | 370,119 | 05 Jan, 2026 |
| Christopher Scott Hill | Svp & Cfo | 142,354 | 05 Jan, 2026 |
| Gwendolyn Gresham | Svp | 52,527 | 05 Jan, 2026 |
| Martha Z. Carnes | 46,328 | 02 Apr, 2025 | |
| Harvey Robert Klingensmith | 41,962 | 02 Apr, 2025 | |
| Mark Damian Tattoli | Svp And Gen Counsel & Secretary | 41,671 | 05 Jan, 2026 |
| Michael Straughen | 29,186 | 02 Apr, 2025 | |
| Kwaku Temeng | 25,528 | 02 Apr, 2025 | |
| Katherine Murray | 21,221 | 02 Apr, 2025 | |
| Curt Anastasio | 15,736 | 02 Apr, 2025 | |
| Kevin Daniels | Cao & Treasurer | 13,115 | 08 Jan, 2024 |
| Sow Hang Teo | Cao & Treasurer | 8,765 | 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Dec, 2025 | Christopher Scott Hill | Common Stock | D | 32,152 | $16.03 | 110,202 | D | F |
| 31 Dec, 2025 | Christopher Scott Hill | Common Stock | A | 61,417 | $0.00 | 142,354 | D | M |
| 31 Dec, 2025 | Lawrence Bruno | Common Stock | D | 112,681 | $16.03 | 257,438 | D | F |
| 31 Dec, 2025 | Lawrence Bruno | Common Stock | A | 180,722 | $0.00 | 370,119 | D | M |
| 31 Dec, 2025 | Gwendolyn Gresham | Common Stock | A | 24,952 | $0.00 | 52,527 | D | M |
| 31 Dec, 2025 | Gwendolyn Gresham | Common Stock | D | 19,301 | $16.03 | 33,226 | D | F |
| 31 Dec, 2025 | Mark Damian Tattoli | Common Stock | D | 14,310 | $16.03 | 27,361 | D | F |
| 31 Dec, 2025 | Mark Damian Tattoli | Common Stock | A | 24,952 | $0.00 | 41,671 | 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 Oct, 2025 | Mark Damian Tattoli | Common Stock | A | 700 | $0.00 | 16,995 | D | M |
| 01 Oct, 2025 | Mark Damian Tattoli | Common Stock | D | 276 | $12.58 | 16,719 | D | F |
| 01 Oct, 2025 | Sow Hang Teo | Common Stock | A | 250 | $0.00 | 8,000 | D | M |
| 01 Oct, 2025 | Sow Hang Teo | Common Stock | D | 99 | $12.58 | 7,901 | D | F |
| 01 Aug, 2025 | Mark Damian Tattoli | Common Stock | A | 250 | $0.00 | 16,394 | D | M |
| 01 Aug, 2025 | Mark Damian Tattoli | Common Stock | D | 99 | $10.53 | 16,295 | D | F |
| 01 Aug, 2025 | Sow Hang Teo | Common Stock | D | 90 | $10.53 | 7,750 | D | F |
| 01 Aug, 2025 | Sow Hang Teo | Common Stock | A | 240 | $0.00 | 7,748 | D | M |
| 01 Aug, 2025 | Sow Hang Teo | Common Stock | D | 108 | $10.53 | 7,640 | D | F |
| 01 Aug, 2025 | Sow Hang Teo | Common Stock | A | 200 | $0.00 | 7,840 | D | M |