KOSIBA JOHN W JR

PrivateCIK: 1703463
Location

DEVENS, MA

KOSIBA JOHN W JR (SVP, CFO & Treasurer) sold 9.6% of their position (36.91K shares) of AMERICAN SUPERCONDUCTOR CORP /DE/ on the open market

Open‑market sale worth $1.86M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 7 sales
InsiderKOSIBA JOHN W JRCIK 1703463
Officer· SVP, CFO & Treasurer
Since Jun 2018
-6.91K
Net shares
Net seller
$1.86M
Total sold
7
Open market trades
0B · 7S
8
Total transactions
30K acquired · 36.91K disposed
Non-Derivative Transactions8

Common Stock

Direct
A · Award

Shares

+30K

Price / share

Trade value

% of position

8.5%
6/1/2026
352.89K382.89K

Common Stock

Direct
S · Sale

Shares

5.70K

Price / share

$49.46

Trade value

$282.13K

% of position

1.5%
6/2/2026
382.89K377.19K

Common Stock

Direct
S · Sale

Shares

12.12K

Price / share

$50.62

Trade value

$613.60K

% of position

3.2%
6/2/2026
377.19K365.06K

Common Stock

Direct
S · Sale

Shares

12.04K

Price / share

$51.47

Trade value

$619.44K

% of position

3.3%
6/2/2026
365.06K353.03K

Common Stock

Direct
S · Sale

Shares

600.00

Price / share

$52.19

Trade value

$31.32K

% of position

0.2%
6/2/2026
353.03K352.43K

Common Stock

Direct
S · Sale

Shares

3.20K

Price / share

$48.31

Trade value

$154.58K

% of position

0.9%
6/3/2026
352.43K349.23K

Common Stock

Direct
S · Sale

Shares

2.64K

Price / share

$49.28

Trade value

$130.01K

% of position

0.8%
6/3/2026
349.23K346.59K

Common Stock

Direct
S · Sale

Shares

609.00

Price / share

$50.83

Trade value

$30.95K

% of position

0.2%
6/3/2026
346.59K345.98K
Total

Net shares

6.91K

Net value

-$1.86M

Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect
Shares owned320.00
Total
320.00 indirect320.00
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
KOSIBA JOHN W JR — Insider Transaction (Form 4) Filed Jun 3, 2026 | Finecho