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 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 $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return

Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

AIC

AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Oberweis Asset Management's AMSC Position: Q1 2026 in Review

Oberweis Asset Management increased its American Superconductor (AMSC) stake by 1.7% in Q1 2026, buying an estimated $442K and bringing the position to 849,900 shares worth $28.8M. The position accounts for 0.85% of the portfolio, ranked #33.

Oberweis Asset Management first reported a position in AMSC in Q4 2023 and has held it in 10 quarters since. The position peaked at $39.5M in Q3 2025. 244 funds tracked by Wall St. Rank hold AMSC as of Q1 2026.

Oberweis Asset Management held 849,900 shares of American Superconductor worth $28.8M as of Q1 2026.
Oberweis Asset Management bought 14,000 American Superconductor shares in Q1 2026, an estimated $442K.
American Superconductor made up 0.85% of Oberweis Asset Management's portfolio in Q1 2026, its #33 holding.
Oberweis Asset Management first reported a position in American Superconductor in Q4 2023 and has held it in 10 quarters since.
Oberweis Asset Management's American Superconductor position peaked at $39.5M in Q3 2025.
244 funds tracked by Wall St. Rank held American Superconductor as of Q1 2026.

Based on Oberweis Asset Management's 13F filing for Q1 2026, filed 15 May 2026.