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MICHAEL W LAMACH

CIK 1279505 · Executive Chair · last filed 2026-06-15

MICHAEL W LAMACH is an Executive Chair who has filed 215 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for PPG, was dated Jun 15, 2026. Across all open-market trades the lifetime net is −$332.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $104.8M 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

$104.80M

Companies

6

Total Filings

215

Lifetime Open-Market Net

-$332.65M

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
PPG Director — $116.16 — $0 61 2026-06-15
NUE Director 4,610 $271.95 $1.25M $0 4 2026-06-03
HON Director 3,159 $230.12 $726.9K $0 9 2026-05-26
TT Executive Chair 183,095 $483.96 $88.61M -$308.88M 61 2021-12-09
IRM Director — $122.39 — $0 1 2015-03-24
IR President and CEO 167,166 $85.02 $14.21M -$23.77M 41 2013-10-02

Recent Filings

215 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
2026-06-15 PPG Grant (A) — $0 EDGAR
2026-06-03 NUE Grant (A) +755 $0 EDGAR
2026-05-26 HON Grant (A) — $0 EDGAR
2026-04-17 PPG Mixed — $0 EDGAR
2026-04-16 HON Exer (M) +625 $144.3K EDGAR
2026-03-13 PPG Grant (A) — $0 EDGAR
2026-01-06 HON Grant (A) — $0 EDGAR
2025-12-15 PPG Grant (A) — $0 EDGAR
2025-09-15 PPG Grant (A) — $0 EDGAR
2025-06-16 PPG Grant (A) — $0 EDGAR
Showing 1–10 of 215
Page 1 of 22
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.