As of September 09, 2026, the three largest insider holders of CLB are Lawrence Bruno (Chairman And Ceo, 262.44K shares), Christopher Scott Hill (Svp Cfo, 142.35K shares), Christopher Scott Hill (Svp Cfo, 142.35K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Lawrence Bruno | Chairman And Ceo | 262,438 | 0 | 262,438 | 35.7% | 04 Aug, 2026 |
| 2 | Christopher Scott Hill | Svp Cfo | 142,354 | 0 | 142,354 | 19.4% | 05 Jan, 2026 |
| 3 | Martha Z. Carnes | Director | 54,397 | 0 | 54,397 | 7.4% | 07 Apr, 2026 |
| 4 | Gwendolyn Gresham | Svp | 52,527 | 0 | 52,527 | 7.1% | 05 Jan, 2026 |
| 5 | Harvey Robert Klingensmith | Director | 50,031 | 0 | 50,031 | 6.8% | 07 Apr, 2026 |
| 6 | Kwaku Temeng | Director | 33,597 | 0 | 33,597 | 4.6% | 07 Apr, 2026 |
| 7 | Katherine Murray | Director | 29,290 | 0 | 29,290 | 4.0% | 08 Apr, 2026 |
| 8 | Michael Straughen | Director | 29,186 | 0 | 29,186 | 4.0% | 02 Apr, 2025 |
| 9 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | 27,764 | 0 | 27,764 | 3.8% | 04 Aug, 2026 |
| 10 | Curt Anastasio | Director | 23,805 | 0 | 23,805 | 3.2% | 07 Apr, 2026 |
| 11 | Kevin Daniels | Cao Treasurer | 13,115 | 0 | 13,115 | 1.8% | 08 Jan, 2024 |
| 12 | Sow Hang Teo | Cao Treasurer | 8,625 | 0 | 8,625 | 1.2% | 04 Aug, 2026 |
| 13 | Robert F Martinovich | Director | 8,069 | 0 | 8,069 | 1.1% | 07 Apr, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Disposed F | 108 | $10.64 | $1.15K | 8,667 | Direct |
| 31 Jul, 2026 | Lawrence Bruno | Chairman And Ceo | Acquired P | 5,000 | $10.78 | $53.90K | 262,438 | Direct |
| 01 Aug, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Disposed F | 99 | $10.64 | $1.05K | 27,665 | Direct |
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Acquired M | 240 | $0.00 | $0 | 8,775 | Direct |
| 01 Aug, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Acquired M | 250 | $0.00 | $0 | 27,764 | Direct |
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Disposed F | 90 | $10.64 | $958 | 8,535 | Direct |
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Acquired M | 200 | $0.00 | $0 | 8,625 | Direct |
| 01 Aug, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Disposed M | 250 | $0.00 | $0 | 950 | Direct |
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Disposed M | 240 | $0.00 | $0 | 6,250 | Direct |
| 01 Aug, 2026 | Sow Hang Teo | Cao Treasurer | Disposed M | 200 | $0.00 | $0 | 6,490 | Direct |
| 01 May, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Disposed F | 97 | $14.07 | $1.36K | 27,514 | Direct |
| 01 May, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Acquired M | 250 | $0.00 | $0 | 27,611 | Direct |
| 01 May, 2026 | Mark Damian Tattoli | Svp, Gen Counsel Secretary | Disposed M | 250 | $0.00 | $0 | 1,200 | Direct |
| 01 Apr, 2026 | Katherine Murray | Director | Acquired M | 8,069 | $0.00 | $0 | 29,290 | Direct |
| 01 Apr, 2026 | Katherine Murray | Director | Acquired A | 7,895 | $0.00 | $0 | 7,895 | Direct |
| 01 Apr, 2026 | Katherine Murray | Director | Disposed M | 8,069 | $0.00 | $0 | 0 | Direct |
| 01 Apr, 2026 | Robert F Martinovich | Director | Acquired M | 8,069 | $0.00 | $0 | 8,069 | Direct |
| 01 Apr, 2026 | Kwaku Temeng | Director | Acquired M | 8,069 | $0.00 | $0 | 33,597 | Direct |
| 01 Apr, 2026 | Curt Anastasio | Director | Acquired M | 8,069 | $0.00 | $0 | 23,805 | Direct |
| 01 Apr, 2026 | Harvey Robert Klingensmith | Director | Acquired M | 8,069 | $0.00 | $0 | 50,031 | Direct |