Livermore

AMERICAN SUPERCONDUCTOR CORP /DE/

AMSC
Exchange
Nasdaq
Industry
Motors & Generators
SEC CIK
0000880807

Insider trades, last 90 days

None

  • No open-market purchases or sales were filed in the last 90 days.
View insider trades

13F holders, Q2 2026

277

  • +32 vs. Q1 2026
  • Total value $1.47B
View 13F holders

Superinvestors holding AMSC

0

  • None of the superinvestors held AMSC at the end of Q2 2026.
See all holders

Price chart

Latest insider trades

View all: Latest insider trades

Open-market purchases and sales by AMSC insiders, newest first.

Insider trades
Filed (ET)Trade dateInsiderTransactionSharesAvg priceValueShares afterHolding changeFiling
Jun 12, 2026Jun 11, 2026Dambier Laura A.DirectorSSaleCommon Stock−4K$37.63−$150.52K14.99K−21.1%SEC
Jun 11, 2026Jun 11, 2026Kosiba John W JRSVP, CFO & TreasurerSSaleCommon Stock−6.77K$37.4639−$253.59K334.38K−2.0%SEC10b5-1
Jun 11, 2026Jun 11, 2026McGahn Daniel PChairman, President and CEOSSaleCommon Stock−16.12K$37.443−$603.47K1.13M−1.4%SEC10b5-1
Jun 10, 2026Jun 8, 2026Kosiba John W JRSVP, CFO & TreasurerSSaleCommon Stock−4.84K$41.7723−$201.97K341.15K−1.4%SEC10b5-1
Jun 10, 2026Jun 8, 2026McGahn Daniel PChairman, President and CEOSSaleCommon Stock−9.67K$41.777−$403.98K1.15M−0.8%SEC10b5-1

Top 5 13F holders, Q2 2026

View all: Top 5 13F holders, Q2 2026

The largest institutional positions in AMSC at the end of Q2 2026.

Institutions holding AMSC in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.4,095,371$170M0.00%+112,721+2.8%Added
VANGUARD CAPITAL MANAGEMENT LLC2,034,219$84.44M0.00%−5,249−0.3%Reduced
BARROW HANLEY MEWHINNEY & STRAUSS LLC1,704,006$70.73M0.21%+564,213+49.5%Added
UBS Group AG1,429,090$59.32M0.01%+829,269+138.3%Added
VANGUARD PORTFOLIO MANAGEMENT LLC1,418,863$58.9M0.00%−292,814−17.1%Reduced