EIM
AMSC icon

Essex Investment Management’s American Superconductor AMSC Stock Holding History

Essex Investment 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
Q2 		$9.21M Sell
221,933
-5,625
-2% -$254K 1.21% 19
2026
Q1 		$7.7M Buy
227,558
+12,404
+6% +$391K 1.22% 18
2025
Q4 		$6.19M Sell
215,154
-30,427
-12% -$1.32M 0.94% 30
2025
Q3 		$14.6M Sell
245,581
-100,461
-29% -$5.02M 2.23% 3
2025
Q2 		$12.7M Sell
346,042
-26,179
-7% -$643K 2.31% 2
2025
Q1 		$6.75M Sell
372,221
-57,655
-13% -$1.44M 1.41% 9
2024
Q4 		$10.6M Sell
429,876
-34,630
-7% -$955K 1.9% 2
2024
Q3 		$11M Sell
464,506
-113,120
-20% -$2.61M 1.91% 1
2024
Q2 		$13.5M Sell
577,626
-6,298
-1% -$104K 2.53% 1
2024
Q1 		$7.89M Sell
583,924
-40,094
-6% -$497K 1.56% 6
2023
Q4 		$6.95M Sell
624,018
-76,815
-11% -$649K 1.37% 10
2023
Q3 		$5.29M Buy
+700,833
New +$5.82M 0.86% 22
2021
Q1 		– Sell
-161,994
Closed -$3.79M – 450
2020
Q4 		$3.79M Sell
161,994
-19,113
-11% -$339K 0.47% 62
2020
Q3 		$2.62M Buy
181,107
+5,726
+3% +$64K 0.38% 72
2020
Q2 		$1.43M Sell
175,381
-64,948
-27% -$425K 0.23% 140
2020
Q1 		$1.32M Buy
240,329
+16,270
+7% +$112K 0.27% 123
2019
Q4 		$1.76M Buy
+224,059
New +$1.8M 0.22% 159
2017
Q4 		– Sell
-17,167
Closed -$78K – 358
2017
Q3 		$78K Buy
+17,167
New +$66.6K 0.01% 350

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

Essex Investment Management's AMSC Position: Q2 2026 in Review

Essex Investment Management reduced its American Superconductor (AMSC) stake by 2.5% in Q2 2026, selling an estimated $254K and leaving 221,933 shares worth $9.21M. The position accounts for 1.21% of the portfolio, ranked #19.

Essex Investment Management first reported a position in AMSC in Q3 2017 and has held it in 18 quarters since. The position peaked at $14.6M in Q3 2025. 279 funds tracked by Wall St. Rank hold AMSC as of Q2 2026.

  • Essex Investment Management held 221,933 shares of American Superconductor worth $9.21M as of Q2 2026.
  • Essex Investment Management sold 5,625 American Superconductor shares in Q2 2026, an estimated $254K.
  • American Superconductor made up 1.21% of Essex Investment Management's portfolio in Q2 2026, its #19 holding.
  • Essex Investment Management first reported a position in American Superconductor in Q3 2017 and has held it in 18 quarters since.
  • Essex Investment Management's American Superconductor position peaked at $14.6M in Q3 2025.
  • 279 funds tracked by Wall St. Rank held American Superconductor as of Q2 2026.

Based on Essex Investment Management's 13F filing for Q2 2026, filed 6 Aug 2026.