Martha Z. Carnes

Director, CORE LABORATORIES N V.

Companies

Core LaboratoriesBoard member Apr 2, 2024 to now¹
SunCoke Energy, Inc.Board member Dec 12, 2019 to now²
Matrix It Ltd.Board member Jul 20, 2017 to now³
CORE LABORATORIES N VBoard member Jul 1, 2016 to Apr 3, 2023⁴

Holdings

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

Shares held

Matrix It Ltd. MTRX71,183 shares⁵$724.6K at $10.18Nov 4, 2025
Core Laboratories CLB54,397 shares⁶$548.9K at $10.09Apr 1, 2026
CORE LABORATORIES N V30,592 shares⁷Apr 1, 2023

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

Recent filings

Apr 1, 2026Exercised options 8,069 shares of Core Laboratories⁶
Nov 4, 2025Granted 7,986 shares of Matrix It Ltd.⁵
Apr 1, 2025Exercised options 9,317 shares of Core Laboratories⁸
Nov 5, 2024Granted 8,290 shares of Matrix It Ltd.⁹
Apr 1, 2024Exercised options 6,419 shares of Core Laboratories¹⁰
Nov 14, 2023Granted 7,991 shares of Matrix It Ltd.¹¹
Apr 1, 2023Exercised options 5,485 shares of CORE LABORATORIES N V⁷
Dec 5, 2022Granted 11,571 shares of Matrix It Ltd.¹²
Apr 1, 2022Exercised options 4,307 shares of CORE LABORATORIES N V¹³
Nov 2, 2021Granted 9,117 shares of Matrix It Ltd.¹⁴

Sources

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

1
SEC EDGARCore Laboratories, Board member
2
SEC EDGARSunCoke Energy, Inc., Board member
3
SEC EDGARMatrix It Ltd., Board member
4
SEC EDGARCORE LABORATORIES N V, Board member
5
SEC EDGARMatrix It Ltd. shares after the filing of Nov 4, 2025
6
SEC EDGARCore Laboratories shares after the filing of Apr 1, 2026
7
SEC EDGARCORE LABORATORIES N V shares after the filing of Apr 1, 2023
8
SEC EDGARForm 4 filed Apr 2, 2025
9
SEC EDGARForm 4 filed Nov 6, 2024
10
SEC EDGARForm 4 filed Apr 2, 2024
11
SEC EDGARForm 4 filed Nov 14, 2023
12
SEC EDGARForm 4 filed Dec 7, 2022
13
SEC EDGARForm 4 filed Apr 4, 2022
14
SEC EDGARForm 4 filed Nov 3, 2021