Gwendolyn Schreffler

SVP, CORE LABORATORIES N V.

Companies

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

As of each latest filing. The line shows shares held over time.

Dec 31, 2025Exercised options 24,952 shares of Core Laboratories³
Dec 31, 2025Shares withheld for tax 19,301 shares at $16.03 of Core Laboratories³
Dec 31, 2024Exercised options 9,604 shares of Core Laboratories⁵
Dec 31, 2024Shares withheld for tax 5,989 shares at $17.31 of Core Laboratories⁵
Dec 31, 2023Exercised options 14,674 shares of Core Laboratories⁶
Dec 31, 2023Shares withheld for tax 5,775 shares at $17.66 of Core Laboratories⁷
Dec 31, 2023Shares withheld for tax 5,643 shares at $17.66 of Core Laboratories⁶
Dec 31, 2022Exercised options 12,000 shares of Core Laboratories⁷
Dec 31, 2022Exercised options 12,000 shares of CORE LABORATORIES N V⁴
Dec 31, 2022Shares withheld for tax 4,722 shares at $20.27 of Core Laboratories⁷
Dec 31, 2022Shares withheld for tax 4,722 shares at $20.27 of CORE LABORATORIES N V⁴
Dec 31, 2021Exercised options 4,700 shares of CORE LABORATORIES N V⁸
Dec 31, 2021Shares withheld for tax 1,850 shares at $22.31 of CORE LABORATORIES N V⁸

The numbers on this page point here. Each one links to the record it came from.