AMSC — AMERICAN SUPERCONDUCTOR CORPCO COM

Ownership history in EMERALD ADVISERS, LLC  ·  15 quarters on record

This page tracks every 13F SEC filing in which EMERALD ADVISERS, LLC reported a position in AMERICAN SUPERCONDUCTOR CORPCO COM (AMSC). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.99% (2025 Q3)
Avg. % of fund
0.32%
First filed
2009 Q2
Last filed
2025 Q4
Quarters held
15
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 ADDED 757,568 +236,385 +45.4% 0.67% $21.8M $28.78
2025 Q3 ADDED 521,183 +21,129 +4.2% 0.99% $31.0M $59.39
2025 Q2 ADDED 500,054 +461,335 +1191.5% 0.67% $18.3M $36.69
2025 Q1 ADDED 38,719 +10,600 +37.7% 0.03% $702K $18.14
11 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% of Fund (quarterly)    AMSC price (monthly, adj. close)

Other funds also holding AMSC

As of 2025 Q4 — sorted by position size

AWM Investment Company, Inc. 3Y 7Y 2.1% Telemark Asset Management, LLC 3Y 7Y 1.78% ESSEX INVESTMENT MANAGEMENT CO LLC 3Y 7Y 0.94% OBERWEIS ASSET MANAGEMENT INC/ 3Y 7Y 0.88% Lumbard & Kellner, LLC 3Y 7Y 0.72% Dynamic Technology Lab Private Ltd 3Y 7Y 0.45% Atreides Management, LP 3Y 0.37% VIRTUS ADVISERS, LLC 3Y 7Y 0.35% Fund Advisors of America Inc/FL 0.29% OXFORD ASSET MANAGEMENT LLP 3Y 7Y 0.25%
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