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THOMAS J SEIFERT

CIK 1473289 · Chief Financial Officer · last filed 2026-08-06

THOMAS J SEIFERT is a Chief Financial Officer who has filed 263 SEC Form 4 insider transactions across 4 companies since 2009. The most recent filing, for NET, was dated Aug 6, 2026. Across all open-market trades the lifetime net is −$294.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $148.6M 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

$148.63M

Companies

4

Total Filings

263

Lifetime Open-Market Net

-$294.38M

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
NET Chief Financial Officer 206,127 $300.27 $61.89M -$290.90M 149 2026-08-06
WOLF Director 20,476 $32.87 $673.0K $0 2 2025-02-03
IPGP Director 8,946 $90.23 $807.2K -$3.48M 13 2022-05-25
AMD SVP, CFO 176,383 $483.36 $85.26M $0 12 2012-06-19

Recent Filings

263 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
2026-08-06 NET Mixed — -$14.06M EDGAR
2026-08-04 NET Notice (144) −55,000 -$15.55M EDGAR
2026-07-17 NET Notice (144) −10,000 -$2.72M EDGAR
2026-07-17 NET Mixed −2,943 -$3.60M EDGAR
2026-06-17 NET Notice (144) −10,000 -$2.31M EDGAR
2026-06-17 NET Mixed −2,944 -$3.00M EDGAR
2026-05-19 NET Mixed −9,667 -$3.94M EDGAR
2026-05-18 NET Notice (144) −10,000 -$1.98M EDGAR
2026-04-17 NET Notice (144) −10,000 -$1.97M EDGAR
2026-04-17 NET Mixed −2,944 -$2.51M EDGAR
Showing 1–10 of 263
Page 1 of 27
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.