Insider transactions

Thomas J Seifert

CIK 1473289 · Chief Financial Officer · last filed 2026-10-19

"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
$133.69M
Companies
4
Total Filings
271
Lifetime Open-Market Net
-$304.52M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

NET price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest
OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address
101 TOWNSEND STREET
SAN FRANCISCO, CA 94107
Related Filers
ADVANCED MICRO DEVICES INC — 13 joint filings, latest 2012-06-19
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
NET Chief Financial Officer 201,538 $271.42 $54.70M -$301.04M 154 2026-10-19
WOLF Director 20,476 $23.53 $481.8K $0 2 2025-02-03
IPGP Director 8,946 $64.89 $580.5K -$3.48M 13 2022-05-25
AMD SVP, CFO 176,383 $441.83 $77.93M $0 12 2012-06-19

Recent Filings · Page 3 of 28

271 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
2026-03-13 NET Grant (A) +142,116 $0 EDGAR
2026-02-24 NET Mixed −31,557 -$7.69M EDGAR
2026-02-20 NET Notice (144) −41,557 -$8.01M EDGAR
2026-02-18 NET Tax (F) −20,477 -$4.01M EDGAR
2026-01-21 NET Mixed — -$1.78M EDGAR
2026-01-20 NET Notice (144) −10,000 -$1.84M EDGAR
2025-12-23 NET Mixed — -$2.02M EDGAR
2025-12-22 NET Notice (144) −10,000 -$1.96M EDGAR
2025-11-21 NET Mixed −31,555 -$8.07M EDGAR
2025-11-20 NET Notice (144) −41,555 -$8.15M EDGAR
Showing 21–30 of 271
Page 3 of 28
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.