John Overdeck’s American Superconductor AMSC Stock Holding History
Bought
Maintained
Sold
Other funds holding AMSC
OAM
John Overdeck's AMSC Position: Q2 2026 in Review
John Overdeck reduced its American Superconductor (AMSC) stake by 47% in Q2 2026, selling an estimated $3.56M and leaving 90,340 shares worth $3.75M. The position accounts for ﹤0.01% of the portfolio, ranked #2419.
John Overdeck first reported a position in AMSC in Q4 2013 and has held it in 26 quarters since. The position peaked at $9.25M in Q4 2025. 277 funds tracked by Wall St. Rank hold AMSC as of Q2 2026.
- John Overdeck held 90,340 shares of American Superconductor worth $3.75M as of Q2 2026.
- John Overdeck sold 78,676 American Superconductor shares in Q2 2026, an estimated $3.56M.
- American Superconductor made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #2419 holding.
- John Overdeck first reported a position in American Superconductor in Q4 2013 and has held it in 26 quarters since.
- John Overdeck's American Superconductor position peaked at $9.25M in Q4 2025.
- 277 funds tracked by Wall St. Rank held American Superconductor as of Q2 2026.
Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.