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Castleark Management’s American Superconductor AMSC Stock Holding History

Castleark 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
2025
Q4 		– Sell
-135,617
Closed -$8.05M – 300
2025
Q3 		$8.05M Buy
135,617
+26,447
+24% +$1.32M 0.23% 88
2025
Q2 		$4.01M Buy
+109,170
New +$2.68M 0.12% 141

Other funds holding AMSC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
AM
Atreides Management Boston, Massachusetts $14.3B AUM 116.01% 1-Year Est. Return
Nuveen
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
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
EA
Emerald Advisers Leola, Pennsylvania $4.25B AUM 141.71% 1-Year Est. Return

Castleark Management's AMSC Position: Q4 2025 in Review

Castleark Management sold out of American Superconductor (AMSC) in Q4 2025, closing a stake of 135,617 shares — an estimated $8.05M sold.

Castleark Management first reported a position in AMSC in Q2 2025 and held it in 2 quarters. The position peaked at $8.05M in Q3 2025. 240 funds tracked by Wall St. Rank hold AMSC as of Q4 2025.

  • Castleark Management reported no remaining American Superconductor position as of Q4 2025 after selling out during the quarter.
  • Castleark Management sold 135,617 American Superconductor shares in Q4 2025, an estimated $8.05M.
  • Castleark Management first reported a position in American Superconductor in Q2 2025 and held it in 2 quarters.
  • Castleark Management's American Superconductor position peaked at $8.05M in Q3 2025.
  • 240 funds tracked by Wall St. Rank held American Superconductor as of Q4 2025.

Based on Castleark Management's 13F filing for Q4 2025, filed 13 Feb 2026.