Gwendolyn Gresham

Gwendolyn Gresham has filed trades across 2 companies (mainly through SEC (Form 4)), most often in Core Laboratories Inc. /DE/ and Core Laboratories N V. Over a trading history stretching from 31 December 2022 to 31 December 2025, the count stands at 11 filings.

The filings describe grants, exercises and other transfers rather than trades on the open market. Such operations are usually part of compensation schedules, which makes them a weaker signal than an open-market trade.

Most recently, on 5 January 2026, the filings show an option exercise in Core Laboratories Inc. /DE/. The median gap between a trade and its publication by SEC (Form 4) is 4 days. The legal deadline for a Form 4 is two business days after the transaction. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.