Mariner
AMSC icon

Mariner’s American Superconductor AMSC Stock Holding History

Mariner’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 		$851K Buy
25,150
+4,587
+22% +$145K ﹤0.01% 2084
2025
Q4 		$592K Buy
20,563
+7,336
+55% +$317K ﹤0.01% 2338
2025
Q3 		$786K Buy
13,227
+932
+8% +$46.6K ﹤0.01% 2087
2025
Q2 		$451K Buy
+12,295
New +$302K ﹤0.01% 2409
2025
Q1 		– Sell
-8,207
Closed -$202K – 3437
2024
Q4 		$202K Buy
+8,207
New +$226K ﹤0.01% 2994

Other funds holding AMSC

BlackRock
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
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return
OAM
Oberweis Asset Management Lisle, Illinois $3.39B AUM 105.5% 1-Year Est. Return
AIC
AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

Mariner's AMSC Position: Q1 2026 in Review

Mariner increased its American Superconductor (AMSC) stake by 22% in Q1 2026, buying an estimated $145K and bringing the position to 25,150 shares worth $851K. The position accounts for ﹤0.01% of the portfolio, ranked #2084.

Mariner first reported a position in AMSC in Q4 2024 and has held it in 5 quarters since. 244 funds tracked by Wall St. Rank hold AMSC as of Q1 2026.

  • Mariner held 25,150 shares of American Superconductor worth $851K as of Q1 2026.
  • Mariner bought 4,587 American Superconductor shares in Q1 2026, an estimated $145K.
  • American Superconductor made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2084 holding.
  • Mariner first reported a position in American Superconductor in Q4 2024 and has held it in 5 quarters since.
  • 244 funds tracked by Wall St. Rank held American Superconductor as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.