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Arthur H House

CIK 1685155 · last filed 2026-04-07

Arthur H House is a corporate insider who has filed 13 SEC Form 4 insider transactions across 2 companies since 2016. The most recent filing, for AMSC, was dated Apr 7, 2026. Across all open-market trades the lifetime net is −$494.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.7M 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

$1.73M

Companies

2

Total Filings

13

Lifetime Open-Market Net

-$494.1K

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
AMSC Director 51,779 $33.45 $1.73M -$494.1K 8 2026-04-07
NNDM Director 1,532 $1.58 $2.4K $0 4 2019-04-04

Recent Filings

13 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
2026-04-07 AMSC Grant (A) +3,116 $0 EDGAR
2025-08-08 AMSC Notice (144) −9,703 -$493.5K EDGAR
2025-08-08 AMSC Mixed — -$428.1K EDGAR
2025-04-04 AMSC Grant (A) +2,639 $0 EDGAR
2024-04-04 AMSC Grant (A) +3,840 $0 EDGAR
2023-04-07 AMSC Grant (A) +11,627 $0 EDGAR
2022-04-06 AMSC Grant (A) +6,067 $0 EDGAR
2021-04-07 AMSC Grant (A) +2,073 $0 EDGAR
2020-04-07 AMSC Grant (A) +7,092 $0 EDGAR
2019-04-04 NNDM Grant (A) +3,152 $0 EDGAR
Showing 1–10 of 13
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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.