AMSC — AMERICAN SUPERCONDUCTOR CORP

Ownership history in PROMETHIUM ADVISORS,LLC  ·  2 quarters on record

This page tracks every 13F SEC filing in which PROMETHIUM ADVISORS,LLC reported a position in AMERICAN SUPERCONDUCTOR CORP (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
0.19% (2025 Q3)
Avg. % of fund
0.15%
First filed
2025 Q2
Last filed
2025 Q3
Quarters held
2
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q3 UNCHANGED 5,500 — 0% 0.19% $327K $59.39
2025 Q2 INITIATED 5,500 — — 0.12% $202K $36.69
% 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% EMERALD ADVISERS, LLC 3Y 7Y 0.67% 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%
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