Driehaus Capital Management’s American Superconductor AMSC Stock Holding History

Driehaus Capital 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	–	Sell	-499,984	Closed	-$14.4M	–	361
2025 Q4	$14.4M	Sell	499,984 -718,960	-59%	-$31.1M	0.1%	242
2025 Q3	$72.4M	Buy	1,218,944 +379,097	+45%	+$19M	0.52%	59
2025 Q2	$30.8M	Buy	839,847 +4	+0%	+$98	0.25%	133
2025 Q1	$15.2M	Sell	839,843 -102,855	-11%	-$2.56M	0.15%	193
2024 Q4	$23.2M	Buy	942,698 +143,936	+18%	+$3.97M	0.19%	161
2024 Q3	$18.9M	Sell	798,762 -123,236	-13%	-$2.84M	0.16%	176
2024 Q2	$21.6M	Sell	921,998 -9,981	-1%	-$165K	0.21%	142
2024 Q1	$12.6M	Buy	+931,979	New	+$11.6M	0.13%	212

Other funds holding AMSC

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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

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

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

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

Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

OAM

Oberweis Asset Management Lisle, Illinois $4.84B AUM 160.95% 1-Year Est. Return

AIC

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

Driehaus Capital Management's AMSC Position: Q1 2026 in Review

Driehaus Capital Management sold out of American Superconductor (AMSC) in Q1 2026, closing a stake of 499,984 shares — an estimated $14.4M sold.

Driehaus Capital Management first reported a position in AMSC in Q1 2024 and held it in 8 quarters. The position peaked at $72.4M in Q3 2025. 245 funds tracked by Wall St. Rank hold AMSC as of Q1 2026.

Driehaus Capital Management reported no remaining American Superconductor position as of Q1 2026 after selling out during the quarter.
Driehaus Capital Management sold 499,984 American Superconductor shares in Q1 2026, an estimated $14.4M.
Driehaus Capital Management first reported a position in American Superconductor in Q1 2024 and held it in 8 quarters.
Driehaus Capital Management's American Superconductor position peaked at $72.4M in Q3 2025.
245 funds tracked by Wall St. Rank held American Superconductor as of Q1 2026.

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