AMERICAN SUPERCONDUCTOR CORP

Ticker: AMSC CUSIP: 030111207 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025
Shares 215,154 Value ($000) $6,192 Avg Close $43.24 Range $28.68 - $70.49
Q3 2025
Shares 245,581 Value ($000) $14,585 Avg Close $49.99 Range $34.87 - $65.70
Q2 2025
Shares 346,042 Value ($000) $12,696 Avg Close $24.58 Range $13.98 - $37.89
Q1 2025
Shares 372,221 Value ($000) $6,752 Avg Close $24.93 Range $17.08 - $35.44
Q4 2024
Shares 429,876 Value ($000) $10,588 Avg Close $27.58 Range $20.60 - $38.02
Q3 2024
Shares 464,506 Value ($000) $10,962 Avg Close $23.05 Range $17.02 - $32.70
Q2 2024
Shares 577,626 Value ($000) $13,511 Avg Close $16.52 Range $11.36 - $27.38
Q1 2024
Shares 583,924 Value ($000) $7,889 Avg Close $12.40 Range $9.37 - $15.24
Q4 2023
Shares 624,018 Value ($000) $6,952 Avg Close $8.46 Range $5.78 - $11.81
Q3 2023
Shares 700,833 Value ($000) $5,291 Avg Close $8.30 Range $5.75 - $17.37
Q4 2020
Shares 161,994 Value ($000) $3,794 Avg Close $17.73 Range $12.90 - $26.44
Q3 2020
Shares 181,107 Value ($000) $2,622 Avg Close $11.18 Range $7.51 - $16.47
Q2 2020
Shares 175,381 Value ($000) $1,426 Avg Close $6.54 Range $5.09 - $8.88
Q1 2020
Shares 240,329 Value ($000) $1,317 Avg Close $6.86 Range $4.40 - $8.60
Q4 2019
Shares 224,059 Value ($000) $1,759 Avg Close $8.05 Range $7.24 - $9.82
Q3 2017
Shares 17,167 Value ($000) $78 Avg Close $3.88 Range $2.89 - $4.98