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Gwendolyn Gresham

CIK 1842114 · SVP · last filed 2026-02-17

Gwendolyn Gresham is a SVP who has filed 13 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing, for CLB, was dated Feb 17, 2026. Current disclosed insider exposure totals $658.2K across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$658.2K

Companies

1

Total Filings

13

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
C/O CORE LABORATORIES LP
6316 WINDFERN ROAD
HOUSTON, TX 77040
Formerly Known As
Schreffler Gwendolyn (2021–2022)
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
CLB SVP 52,527 $12.53 $658.2K $0 13 2026-02-17

Recent Filings

13 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-02-17 CLB Grant (A) — $0 EDGAR
2026-01-05 CLB Mixed +5,651 -$309.4K EDGAR
2025-02-13 CLB Grant (A) — $0 EDGAR
2025-01-03 CLB Mixed +3,615 -$103.7K EDGAR
2024-02-15 CLB Grant (A) — $0 EDGAR
2024-01-08 CLB Mixed +1,503 -$197.7K EDGAR
2024-01-03 CLB Mixed +9,031 -$99.7K EDGAR
2023-02-21 CLB Grant (A) — $0 EDGAR
2023-01-04 CLB Mixed −7,278 $95.7K EDGAR
2022-02-17 CLB Grant (A) — $0 EDGAR
Showing 1–10 of 13
Page 1 of 2
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.