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Promethium Advisors’s American Superconductor AMSC Stock Holding History

Promethium Advisors’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 		$208K Buy
+5,000
New +$226K 0.1% 116
2025
Q4 		– Sell
-5,500
Closed -$327K – 117
2025
Q3 		$327K Hold
5,500
– – 0.19% 91
2025
Q2 		$202K Buy
+5,500
New +$135K 0.12% 109

Other funds holding AMSC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
OAM
Oberweis Asset Management Lisle, Illinois $4.84B AUM 160.95% 1-Year Est. Return

Promethium Advisors's AMSC Position: Q2 2026 in Review

Promethium Advisors opened a new position in American Superconductor (AMSC) in Q2 2026: 5,000 shares worth $208K. The stake represents 0.1% of the portfolio and ranks #116 among its holdings. This is a return to the name: Promethium Advisors previously reported a position in AMSC as recently as Q3 2025.

Promethium Advisors first reported a position in AMSC in Q2 2025 and has held it in 3 quarters since. The position peaked at $327K in Q3 2025. 279 funds tracked by Wall St. Rank hold AMSC as of Q2 2026.

  • Promethium Advisors held 5,000 shares of American Superconductor worth $208K as of Q2 2026.
  • American Superconductor was a new Promethium Advisors position in Q2 2026.
  • American Superconductor made up 0.1% of Promethium Advisors's portfolio in Q2 2026, its #116 holding.
  • Promethium Advisors first reported a position in American Superconductor in Q2 2025 and has held it in 3 quarters since.
  • Promethium Advisors's American Superconductor position peaked at $327K in Q3 2025.
  • 279 funds tracked by Wall St. Rank held American Superconductor as of Q2 2026.

Based on Promethium Advisors's 13F filing for Q2 2026, filed 5 Aug 2026.