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David J Tudor

CIK 1432308 · last filed 2026-08-28

David J Tudor is a corporate insider who has filed 46 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for NBR, was dated Aug 28, 2026. Across all open-market trades the lifetime net is −$1.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.0M across reported positions. 19 SEC filings were submitted jointly with Western Gas Equity Partners, LP.

"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

$2.03M

Companies

3

Total Filings

46

Lifetime Open-Market Net

-$1.09M

Filer Profile

Reported Address
C/O NABORS CORPORATE SERVICES, INC.
515 W. GREENS ROAD
HOUSTON, TX 77067
Related Filers
Western Gas Equity Partners, LP — 19 joint filings, latest 2020-05-18
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
NBR Director 5,264 $90.84 $478.2K -$295.4K 3 2026-08-28
WES Director 31,241 $49.54 $1.55M -$860.4K 29 2020-05-18
Western Midstream Partners, LP (WGP) Delisted Director 8,463 — — $70.0K 12 2018-06-04

Recent Filings

46 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
2026-08-28 NBR Notice (144) −3,200 -$294.5K EDGAR
2026-08-28 NBR Sell (S) −3,200 -$295.4K EDGAR
2026-06-03 NBR Grant (A) +1,324 $0 EDGAR
2025-07-25 NBR Grant (A) +6,440 $0 EDGAR
2020-05-18 WES Grant (A) — $0 EDGAR
2019-09-23 WES Sell (S) −5,000 -$135.0K EDGAR
2019-08-12 WES Exer (M) +4,202 $0 EDGAR
2019-05-09 WES Mixed +4,484 $0 EDGAR
2019-03-04 WES Grant (A) +19,092 $0 EDGAR
2019-03-04 — Disp (D) −12,519 $0
Showing 1–10 of 46
Page 1 of 5
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.