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Core Laboratories

Core Laboratories (NYSE: CLB) insider transactions

In the twelve months to 10 November 2026, executives and directors of Core Laboratories reported 0 open-market sales and 1 open-market purchase of 5,000 shares ($53,900), by 1 person, according to the Form 4 filings they submitted to the SEC.

Latest transactions

The 20 most recent transactions in Core Laboratories shares reported on Form 4
DateInsiderRoleTransactionSharesPriceHeld afterFiling
1 October 2026Teo Sow HangCAO & TreasurerShares withheld for tax−99$9.768,818Form 4
1 October 2026Teo Sow HangCAO & TreasurerOption exercise+250—8,917Form 4
1 October 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryShares withheld for tax−276$9.7628,089Form 4
1 October 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryOption exercise+700—28,365Form 4
1 August 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryShares withheld for tax−99$10.6427,665Form 4
1 August 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryOption exercise+250—27,764Form 4
1 August 2026Teo Sow HangCAO & TreasurerShares withheld for tax−108$10.648,667Form 4
1 August 2026Teo Sow HangCAO & TreasurerOption exercise+240—8,775Form 4
1 August 2026Teo Sow HangCAO & TreasurerShares withheld for tax−90$10.648,535Form 4
1 August 2026Teo Sow HangCAO & TreasurerOption exercise+200—8,625Form 4
31 July 2026Bruno LawrenceChairman and CEOOpen-market purchase+5,000$10.78262,438Form 4
1 May 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryShares withheld for tax−97$14.0727,514Form 4
1 May 2026Tattoli Mark DamianSVP, Gen Counsel & SecretaryOption exercise+250—27,611Form 4
1 April 2026Murray KatherineDirectorOption exercise+8,069—29,290Form 4
1 April 2026Carnes Martha Z.DirectorOption exercise+8,069—54,397Form 4
1 April 2026Martinovich Robert FDirectorOption exercise+8,069—8,069Form 4
1 April 2026Temeng KwakuDirectorOption exercise+8,069—33,597Form 4
1 April 2026Klingensmith Harvey RobertDirectorOption exercise+8,069—50,031Form 4
1 April 2026Anastasio CurtDirectorOption exercise+8,069—23,805Form 4
31 December 2025Bruno LawrenceChairman and CEOShares withheld for tax−112,681$16.03257,438Form 4

Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.

How to read the table

Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.

Where each row comes from

From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Core Laboratories page; the method, in data sources.

Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.