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David Thomas Seaton

CIK 1392152 · Chairman and CEO · last filed 2026-06-01

David Thomas Seaton is a Chairman and CEO who has filed 108 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for MOS, was dated Jun 1, 2026. Across all open-market trades the lifetime net is −$30.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $23.9M across reported positions. 69 SEC filings were submitted jointly with FLUOR CORP.

"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

$23.93M

Companies

4

Total Filings

108

Lifetime Open-Market Net

-$30.58M

Filer Profile

Reported Address
SHIPPING & RECEIVING CENTER
16930 PARK ROW DR.
HOUSTON, TX 77084
Related Filers
FLUOR CORP — 69 joint filings, latest 2019-04-12
CONOCOPHILLIPS — 8 joint filings, latest 2026-01-20
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
MOS Director 51,089 $23.05 $1.18M $0 32 2026-06-01
NEM Director 5,140 $121.39 $623.9K $0 2 2026-05-15
COP Director 2,500 $127.42 $318.6K $98.5K 7 2026-01-20
FLR Chairman and CEO 433,497 $50.31 $21.81M -$30.68M 67 2019-04-12

Recent Filings

108 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
2026-06-01 MOS Mixed +3,167 $0 EDGAR
2026-05-15 NEM Grant (A) +1,645 $0 EDGAR
2026-01-20 COP Grant (A) — $0 EDGAR
2025-06-02 MOS Mixed +3,914 $0 EDGAR
2025-05-05 NEM Grant (A) +3,495 $0 EDGAR
2025-01-17 COP Grant (A) — $0 EDGAR
2024-06-07 MOS Mixed +2,996 $0 EDGAR
2024-05-21 MOS Exer (M) +2,882 $0 EDGAR
2024-01-17 COP Grant (A) — $0 EDGAR
2023-05-26 MOS Mixed +1,674 $0 EDGAR
Showing 1–10 of 108
Page 1 of 11
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.