Oberweis Asset Management’s American Superconductor AMSC Stock Holding History

Oberweis Asset Management’s Portfolio AMSC Stock Details AMSC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$41M	Buy	987,500 +137,600	+16%	+$6.22M	0.85%	31
2026 Q1	$28.8M	Buy	849,900 +14,000	+2%	+$442K	0.85%	33
2025 Q4	$24.1M	Buy	835,900 +170,200	+26%	+$7.36M	0.88%	32
2025 Q3	$39.5M	Sell	665,700 -2,500	-0.4%	-$125K	1.51%	10
2025 Q2	$24.5M	Hold	668,200	–	–	1.07%	23
2025 Q1	$12.1M	Buy	668,200 +3,800	+0.6%	+$94.8K	0.6%	61
2024 Q4	$16.4M	Hold	664,400	–	–	0.77%	45
2024 Q3	$15.7M	Hold	664,400	–	–	0.8%	37
2024 Q2	$15.5M	Buy	664,400 +30,000	+5%	+$496K	0.95%	28
2024 Q1	$8.57M	Buy	634,400 +258,600	+69%	+$3.21M	0.62%	60
2023 Q4	$4.19M	Buy	+375,800	New	+$3.18M	0.39%	104

Other funds holding AMSC

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

AIC

AWM Investment Company New York $1.15B AUM 201.65% 1-Year Est. Return

Oberweis Asset Management's AMSC Position: Q2 2026 in Review

Oberweis Asset Management increased its American Superconductor (AMSC) stake by 16% in Q2 2026, buying an estimated $6.22M and bringing the position to 987,500 shares worth $41M. The position accounts for 0.85% of the portfolio, ranked #31.

Oberweis Asset Management first reported a position in AMSC in Q4 2023 and has held it in 11 quarters since. 279 funds tracked by Wall St. Rank hold AMSC as of Q2 2026.

Oberweis Asset Management held 987,500 shares of American Superconductor worth $41M as of Q2 2026.
Oberweis Asset Management bought 137,600 American Superconductor shares in Q2 2026, an estimated $6.22M.
American Superconductor made up 0.85% of Oberweis Asset Management's portfolio in Q2 2026, its #31 holding.
Oberweis Asset Management first reported a position in American Superconductor in Q4 2023 and has held it in 11 quarters since.
279 funds tracked by Wall St. Rank held American Superconductor as of Q2 2026.

Based on Oberweis Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.