AMSC American Superconductor Corporation

NASDAQ
$30.19

American Superconductor Corporation (AMSC) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-26.32
7 buyers / 12 sellers
STRONG SELLING
Funds compared
19
funds with comparable AMSC positions
16 current holders · 14 prior-quarter holders
Net share change
-756.1K
+191.8K added, -947.9K cut
Position activity
5 new 2 increased 9 reduced 3 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
MARSHALL WACE, LLP Long/Short New +53.3K — $2.2M 0.0% 58
Holocene Advisors, LP Increased +83.6K +689.2% $3.5M 0.0% 52
CITADEL ADVISORS LLC Quant Reduced -196.2K -90.5% $8.1M 0.0% 51
Walleye Capital Long/Short Quant Sold Out -6.3K -100.0% $260.9K 0.0% 51
Aquatic Capital Management Quant New +32.1K — $1.3M 0.0% 50
Portolan Capital Management Long/Short Reduced -266.3K -90.1% $11.1M 0.0% 50
Cinctive Capital Management Long/Short Quant Sold Out -13.8K -100.0% $574.2K 0.0% 50
Boothbay Fund Management New +7.4K — $307.8K 0.0% 49
Winton Group Quant Macro Sold Out -11.3K -100.0% $467.7K 0.0% 48
Y-Intercept Quant New +5.6K — $231.4K 0.0% 48

Most significant buyers

By move score, not size.

  • MARSHALL WACE, LLP New · +53.3K
  • Holocene Advisors, LP Increased · +83.6K
  • Aquatic Capital Management New · +32.1K
  • Boothbay Fund Management New · +7.4K
  • Y-Intercept New · +5.6K

Most significant sellers

By move score, not size.

  • CITADEL ADVISORS LLC Reduced · -196.2K
  • Walleye Capital Sold Out · -6.3K
  • Portolan Capital Management Reduced · -266.3K
  • Cinctive Capital Management Sold Out · -13.8K
  • Winton Group Sold Out · -11.3K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
MARSHALL WACE, LLP 2 53.3K 0 +53.3K — 0.0% New 58
Holocene Advisors, LP 2 95.7K 12.1K +83.6K +689.2% 0.0% Increased 52
CITADEL ADVISORS LLC 1 20.5K 216.7K -196.2K -90.5% 0.0% Reduced 51
Walleye Capital 3 0 6.3K -6.3K -100.0% 0.0% Sold Out 51
Aquatic Capital Management 4 32.1K 0 +32.1K — 0.0% New 50
Portolan Capital Management 3 29.3K 295.6K -266.3K -90.1% 0.0% Reduced 50
Cinctive Capital Management 3 0 13.8K -13.8K -100.0% 0.0% Sold Out 50
Boothbay Fund Management 4 7.4K 0 +7.4K — 0.0% New 49
Winton Group 4 0 11.3K -11.3K -100.0% 0.0% Sold Out 48
Y-Intercept 4 5.6K 0 +5.6K — 0.0% New 48
Quantbot Technologies 4 139 0 +139 — 0.0% New 45
Balyasny Asset Management L.P. 2 68.8K 144.1K -75.3K -52.2% 0.0% Reduced 41
TWO SIGMA INVESTMENTS, LP 2 90.3K 169.0K -78.7K -46.5% 0.0% Reduced 39
ExodusPoint Capital Management 3 8.3K 26.5K -18.2K -68.6% 0.0% Reduced 38
D. E. Shaw & Co., Inc. 1 366.8K 567.6K -200.7K -35.4% 0.0% Reduced 38
Qube Research & Technologies Ltd 2 250.6K 329.4K -78.8K -23.9% 0.0% Reduced 32
MILLENNIUM MANAGEMENT LLC 2 100.8K 101.6K -814 -0.8% 0.0% Reduced 26
Quadrature Capital 3 37.7K 39.1K -1.5K -3.7% 0.0% Reduced 22
AQR Capital Management 3 194.5K 184.8K +9.7K +5.3% 0.0% Increased 21

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.