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Martha Z. Carnes

CIK 1678397 · last filed 2026-05-18

Martha Z. Carnes is a corporate insider who has filed 47 SEC Form 4 insider transactions across 4 companies since 2016. The most recent filing, for SXC, was dated May 18, 2026. Across all open-market trades the lifetime net is +$23.0K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.4M 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

$1.44M

Companies

4

Total Filings

47

Lifetime Open-Market Net

$23.0K

Filer Profile

Reported Address
6316 WINDFERN ROAD
HOUSTON, TX 77040
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
SXC Director — $10.02 — $0 17 2026-05-18
CLB Director 54,397 $12.50 $680.0K $23.0K 12 2026-04-07
MTRX Director 71,183 $10.61 $755.3K $0 9 2025-11-05
SunCoke Energy Partners, L.P. (SXCP) Delisted Director 1,668 — — $0 8 2019-06-20

Recent Filings

47 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
2026-05-18 SXC Grant (A) — $0 EDGAR
2026-04-07 CLB Mixed +8,069 $0 EDGAR
2025-11-05 MTRX Grant (A) +7,986 $0 EDGAR
2025-05-15 SXC Grant (A) — $0 EDGAR
2025-04-02 CLB Mixed +9,317 $0 EDGAR
2024-11-06 MTRX Grant (A) +8,290 $0 EDGAR
2024-05-16 SXC Grant (A) — $0 EDGAR
2024-04-02 CLB Mixed +6,419 $0 EDGAR
2023-11-14 MTRX Grant (A) +7,991 $0 EDGAR
2023-05-17 SXC Grant (A) — $0 EDGAR
Showing 1–10 of 47
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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.