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Donald R. Maier

CIK 1537460 · President and CEO · last filed 2025-11-04

Donald R. Maier is a President and CEO who has filed 31 SEC Form 4 insider transactions across 3 companies since 2012. The most recent filing, for NX, was dated Nov 4, 2025. Across all open-market trades the lifetime net is −$5.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $14.9M 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

$14.91M

Companies

3

Total Filings

31

Lifetime Open-Market Net

-$5.83M

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
NX Director — $21.06 — $0 8 2025-11-04
AWI President and CEO 81,306 $183.35 $14.91M -$5.83M 22 2019-04-01
Armstrong Flooring, Inc. (AFI) Delisted President and CEO 10,563 $0.35 $3.7K $0 1 2016-04-13

Recent Filings

31 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
2025-11-04 NX Grant (A) — $0 EDGAR
2024-11-04 NX Grant (A) — $0 EDGAR
2023-11-02 NX Grant (A) — $0 EDGAR
2022-11-03 NX Grant (A) — $0 EDGAR
2021-11-02 NX Grant (A) — $0 EDGAR
2020-11-03 NX Grant (A) — $0 EDGAR
2019-11-04 NX Grant (A) — $0 EDGAR
2019-04-01 AWI Mixed +35,617 -$257.1K EDGAR
2019-03-25 NX Grant (A) — $0 EDGAR
2019-03-11 AWI Grant (A) — $0 EDGAR
Showing 1–10 of 31
Page 1 of 4
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.