Core Laboratories (CLB) SVP Mark Tattoli Exercises Options, Sells Shares

What Happened

• Mark Damian Tattoli, SVP, General Counsel & Secretary of Core Laboratories (CLB), had derivative awards exercise/convert on August 1, 2026 and a small withholding sale to cover taxes. The Form 4 reports 250 shares acquired via exercise/conversion of a derivative (reported at $0.00), 250 derivative shares disposed (reported at $0.00), and a tax-withholding disposition of 99 shares sold at $10.64 each for $1,053. The primary economic effect reported is the tax-withholding sale of 99 shares.

Key Details

• Transaction date: 2026-08-01; Form 4 filed: 2026-08-04 (filed within the typical 2-business-day window).
• Reported transactions:
  • Exercise/conversion of derivative (code M): 250 shares acquired @ $0.00 (value $0).
  • Exercise/conversion of derivative (code M): 250 shares disposed @ $0.00 (derivative).
  • Tax withholding sale (code F): 99 shares sold @ $10.64 = $1,053 (to cover tax obligations).
• Shares owned after the transactions: not specified in this filing.
• Footnotes: F1 notes the restricted shares vest annually over six years if the reporting person remains in service; F2 indicates multiple restricted share grants are included in the total—consistent with vesting/conversion of restricted awards rather than an open-market purchase or sale.

Context

• The $0.00 price on the derivative entries and the footnotes indicate these were vesting/conversion of restricted share awards (not an open-market purchase). The subsequent 99-share disposition is a routine tax-withholding sale to satisfy tax obligations on vested awards and is commonly seen after vesting events.
• These transactions are administrative (vesting and tax withholding) rather than an outright market sale of additional shares, and should be interpreted as routine compensation-related activity rather than a direct signal of insider sentiment.