Arthur H. House

CIK: 0001685155

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (25.0%)

Position reduction

Option Exercises (M)1 (25.0%)

Derivative conversions

Awards (A)2 (50.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

AMSC

AMERICAN SUPERCONDUCTOR CORP /DE/

Director

Discretionary Trading P&L

Holdings

Transaction History (4 total)

AMSC
AMERICAN SUPERCONDUCTOR CORP /DE/
Apr 3, 2026
Award(A)
Direct
3.1K shares-
AMSC
AMERICAN SUPERCONDUCTOR CORP /DE/
Aug 8, 2025
Sale(S)
Direct
9.7K shares at avg. $50.92$494K
AMSC
AMERICAN SUPERCONDUCTOR CORP /DE/
Aug 6, 2025
Exercise(M)
Direct
9.7K shares at avg. $6.80$66K
AMSC
AMERICAN SUPERCONDUCTOR CORP /DE/
Apr 3, 2025
Award(A)
Direct
2.6K shares-

		Type	Shares	Price		Ownership
Apr 3, 2026	AMSC AMERICAN SUPERCONDUCTOR CORP /DE/	Award(A)	3,116	-	$0	Direct
Aug 8, 2025	AMSC AMERICAN SUPERCONDUCTOR CORP /DE/	Sale(S)	9,703	$50.92	$494,082	Direct
Aug 6, 2025	AMSC AMERICAN SUPERCONDUCTOR CORP /DE/	Exercise(M)	9,703	$6.80	$65,980	Direct
Apr 3, 2025	AMSC AMERICAN SUPERCONDUCTOR CORP /DE/	Award(A)	2,639	-	-	Direct

1-4 of 4 transactions

About House Arthur H

House Arthur H (SEC CIK 0001685155) files insider reports with the SEC as Director of AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC).

Signal8 holds 3 ownership filings by House Arthur H, all Form 4s, filed between Apr 4, 2025 and Apr 7, 2026. Those filings report 4 transactions, from Apr 3, 2025 to Apr 3, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on House Arthur H's filings is in AYER, MA.

Recent filings by House Arthur H

Apr 3, 2026: Grant or award of AMSC shares (Form 4, code A).
Aug 8, 2025: Open-market sale of AMSC shares (Form 4, code S).
Aug 6, 2025: Option exercise of AMSC shares (Form 4, code M).
Apr 3, 2025: Grant or award of AMSC shares (Form 4, code A).

Other insiders filing for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC)

Littlefield Barbara G., Director
Dambier Laura A., Director
Kosiba John W JR, SVP, CFO & Treasurer
McGahn Daniel P, Chairman, President and CEO
Donnelly Terence Robert, Director
OLIVER DAVID R JR, Director

How to read Form 4 transaction codes