Mariner, LLC
- SEC CIK
- 0001373442
- Latest filing
- Aug 13, 2026
AMSC holding history
American Superconductor Corp in every 13F filed by Mariner, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
AMSC overviewAll 13F holders of AMSCFull Q2 2026 holdings
- Shares (Q2 2026)
- 18,751
- Value
- $778.5K
- % of portfolio
- <0.1%
- Quarters held
- 6
- Since Q4 2024
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 18,751 | $778.5K | <0.1% | −6,399−25.4% | Reduced | Holders |
| Q1 2026 | 25,150 | $851.3K | <0.1% | +4,587+22.3% | Added | Holders |
| Q4 2025 | 20,563 | $591.7K | <0.1% | +7,336+55.5% | Added | Holders |
| Q3 2025 | 13,227 | $785.6K | <0.1% | +932+7.6% | Added | Holders |
| Q2 2025 | 12,295 | $451.1K | <0.1% | +12,295 | New | Holders |
| Q1 2025 | 0 | $0 | 0.0% | −8,207−100.0% | Sold out | Holders |
| Q4 2024 | 8,207 | $202.1K | <0.1% | +8,207 | New | Holders |