Question 1

Who are the insiders buying Core Laboratories Inc. /DE/ stock?

Accepted Answer

InsiderAct tracks all open-market purchases of Core Laboratories Inc. /DE/ stock by corporate insiders — including officers, directors, and shareholders owning more than 10% — sourced from public SEC Form 4 filings.

Question 2

What does insider buying at a company mean?

Accepted Answer

When a corporate officer, director, or major shareholder purchases their own company's stock on the open market using personal funds, it signals confidence in the company's outlook. This is especially meaningful when multiple insiders buy within the same 7–14 day window (cluster buying) or when the purchase size exceeds $100,000.

Question 3

How do I find cluster buying signals for a company?

Accepted Answer

InsiderAct automatically detects cluster buying — two or more insiders independently purchasing shares within a 14-day window. When a cluster buy signal is active for a company, it appears prominently on the company's InsiderAct page and on the Signals tab.

Question 4

Has Core Laboratories Inc. /DE/ had any recent large insider purchases?

Accepted Answer

InsiderAct tracks all open-market purchases of $100,000 or more at Core Laboratories Inc. /DE/. Large insider purchases are flagged as high-conviction signals because they represent meaningful personal capital commitments by executives or directors who have direct visibility into the company's operations and prospects.

Question 5

Where do the insider transactions on this page come from?

Accepted Answer

All transactions shown on InsiderAct company pages are sourced directly from SEC EDGAR Form 4 filings — the mandatory public disclosures that corporate insiders must submit within 2 business days of any stock transaction. InsiderAct ingests these filings in near real time and filters for open-market purchases and sales.


2026-05-04	2026-05-01	Tattoli Mark Damian	SVP	Tax Payment	97	$14.07	$1,365
2026-05-04	2026-05-01	Tattoli Mark Damian	SVP	Exercise Conversion	250	$0.00	$0
2026-04-08	2026-04-01	Murray Katherine	Director	Exercise Conversion	8,069	$0.00	$0
2026-04-07	2026-04-01	Anastasio Curt	Director	Exercise Conversion	8,069	$0.00	$0
2026-04-07	2026-04-01	Klingensmith Harvey Robert	Director	Exercise Conversion	8,069	$0.00	$0
2026-04-07	2026-04-01	Temeng Kwaku	Director	Exercise Conversion	8,069	$0.00	$0
2026-04-07	2026-04-01	Martinovich Robert F	Director	Exercise Conversion	8,069	$0.00	$0
2026-04-07	2026-04-01	Carnes Martha Z.	Director	Exercise Conversion	8,069	$0.00	$0
2026-01-05	2025-12-31	Gresham Gwendolyn	SVP	Tax Payment	19,301	$16.03	-$309,395
2026-01-05	2025-12-31	Gresham Gwendolyn	SVP	Exercise Conversion	24,952	$0.00	$0

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