Core Laboratories Inc. (CLB) · Insider trading
What Core Laboratories's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$53,900
1 insider, 1 trade
Sold, 12 months
$0
0 insiders
Net, 12 months
+$53,900
bought less sold
Latest filing
2026-10-05
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Bruno LawrenceDirector, Chairman and CEO | $53,900 | – | 1 | 2026-07-31 | 262,438 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-31 | Bruno LawrenceDirector, Chairman and CEO | Buy | 5,000 | 10.78 | $53,900 | 262,438 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
36 × option exercise25 × shares withheld for tax
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-10-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −99 | 9.76 | 8,818 | Form 4 |
| 2026-10-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +250 | – | 8,917 | Form 4 |
| 2026-10-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −276 | 9.76 | 28,089 | Form 4 |
| 2026-10-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +700 | – | 28,365 | Form 4 |
| 2026-08-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −99 | 10.64 | 27,665 | Form 4 |
| 2026-08-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +250 | – | 27,764 | Form 4 |
| 2026-08-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −108 | 10.64 | 8,667 | Form 4 |
| 2026-08-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +240 | – | 8,775 | Form 4 |
| 2026-08-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −90 | 10.64 | 8,535 | Form 4 |
| 2026-08-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +200 | – | 8,625 | Form 4 |
| 2026-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −97 | 14.07 | 27,514 | Form 4 |
| 2026-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +250 | – | 27,611 | Form 4 |
| 2026-04-01 | Murray KatherineDirector | Option exercise M | +8,069 | – | 29,290 | Form 4 |
| 2026-04-01 | Carnes Martha Z.Director | Option exercise M | +8,069 | – | 54,397 | Form 4 |
| 2026-04-01 | Martinovich Robert FDirector | Option exercise M | +8,069 | – | 8,069 | Form 4 |
| 2026-04-01 | Temeng KwakuDirector | Option exercise M | +8,069 | – | 33,597 | Form 4 |
| 2026-04-01 | Klingensmith Harvey RobertDirector | Option exercise M | +8,069 | – | 50,031 | Form 4 |
| 2026-04-01 | Anastasio CurtDirector | Option exercise M | +8,069 | – | 23,805 | Form 4 |
| 2025-12-31 | Bruno LawrenceDirector, Chairman and CEO | Shares withheld for tax F | −112,681 | 16.03 | 257,438 | Form 4 |
| 2025-12-31 | Bruno LawrenceDirector, Chairman and CEO | Option exercise M | +180,722 | – | 370,119 | Form 4 |
| 2025-12-31 | Hill Christopher ScottSVP & CFO | Shares withheld for tax F | −32,152 | 16.03 | 110,202 | Form 4 |
| 2025-12-31 | Hill Christopher ScottSVP & CFO | Option exercise M | +61,417 | – | 142,354 | Form 4 |
| 2025-12-31 | Gresham GwendolynSVP | Shares withheld for tax F | −19,301 | 16.03 | 33,226 | Form 4 |
| 2025-12-31 | Gresham GwendolynSVP | Option exercise M | +24,952 | – | 52,527 | Form 4 |
| 2025-12-31 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −14,310 | 16.03 | 27,361 | Form 4 |
| 2025-12-31 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +24,952 | – | 41,671 | Form 4 |
| 2025-12-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −340 | 15.39 | 8,425 | Form 4 |
| 2025-12-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +864 | – | 8,765 | Form 4 |
| 2025-10-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −99 | 12.58 | 7,901 | Form 4 |
| 2025-10-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +250 | – | 8,000 | Form 4 |
| 2025-10-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −276 | 12.58 | 16,719 | Form 4 |
| 2025-10-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +700 | – | 16,995 | Form 4 |
| 2025-08-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −90 | 10.53 | 7,750 | Form 4 |
| 2025-08-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +200 | – | 7,840 | Form 4 |
| 2025-08-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −108 | 10.53 | 7,640 | Form 4 |
| 2025-08-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +240 | – | 7,748 | Form 4 |
| 2025-08-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −99 | 10.53 | 16,295 | Form 4 |
| 2025-08-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +250 | – | 16,394 | Form 4 |
| 2025-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −99 | 11.68 | 16,144 | Form 4 |
| 2025-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +250 | – | 16,243 | Form 4 |
| 2025-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −79 | 11.68 | 15,993 | Form 4 |
| 2025-05-01 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +200 | – | 16,072 | Form 4 |
| 2025-05-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −79 | 11.68 | 7,508 | Form 4 |
| 2025-05-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +175 | – | 7,587 | Form 4 |
| 2025-04-01 | Straughen MichaelDirector | Shares withheld for tax F | −4,634 | 14.98 | 24,552 | Form 4 |
| 2025-04-01 | Straughen MichaelDirector | Option exercise M | +9,317 | – | 29,186 | Form 4 |
| 2025-04-01 | Anastasio CurtDirector | Option exercise M | +9,317 | – | 15,736 | Form 4 |
| 2025-04-01 | Carnes Martha Z.Director | Option exercise M | +9,317 | – | 46,328 | Form 4 |
| 2025-04-01 | Klingensmith Harvey RobertDirector | Option exercise M | +9,317 | – | 41,962 | Form 4 |
| 2025-04-01 | Murray KatherineDirector | Option exercise M | +9,317 | – | 21,221 | Form 4 |
| 2025-04-01 | Temeng KwakuDirector | Option exercise M | +9,317 | – | 25,528 | Form 4 |
| 2024-12-31 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Shares withheld for tax F | −5,028 | 17.31 | 15,872 | Form 4 |
| 2024-12-31 | Tattoli Mark DamianSVP, Gen Counsel & Secretary | Option exercise M | +9,604 | – | 20,900 | Form 4 |
| 2024-12-31 | Gresham GwendolynSVP | Shares withheld for tax F | −5,989 | 17.31 | 27,575 | Form 4 |
| 2024-12-31 | Gresham GwendolynSVP | Option exercise M | +9,604 | – | 33,564 | Form 4 |
| 2024-12-31 | Hill Christopher ScottSVP & CFO | Shares withheld for tax F | −14,719 | 17.31 | 80,937 | Form 4 |
| 2024-12-31 | Hill Christopher ScottSVP & CFO | Option exercise M | +23,607 | – | 95,656 | Form 4 |
| 2024-12-31 | Bruno LawrenceDirector, Chairman and CEO | Shares withheld for tax F | −43,380 | 17.31 | 189,397 | Form 4 |
| 2024-12-31 | Bruno LawrenceDirector, Chairman and CEO | Option exercise M | +69,574 | – | 232,777 | Form 4 |
| 2024-12-01 | Teo Sow HangCAO & Treasurer | Shares withheld for tax F | −227 | 20.42 | 7,412 | Form 4 |
| 2024-12-01 | Teo Sow HangCAO & Treasurer | Option exercise M | +576 | – | 7,639 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.