Ownership history in GROUP ONE TRADING LLC · 8 quarters on record
This page tracks every 13F SEC filing in which GROUP ONE TRADING LLC reported a position in AMBAC FINL GROUP INC (AMBC). 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.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q3 | REDUCED | 20,449 | -301,275 | -93.6% | 0.00% | $171K | — |
| 2025 Q2 | REDUCED | 321,724 | -19,744 | -5.8% | 0.01% | $2.3M | — |
| 2025 Q1 | ADDED | 341,468 | +325,352 | +2018.8% | 0.01% | $3.0M | — |
| 2024 Q4 | ADDED | 16,116 | +6,352 | +65.1% | 0.00% | $204K | — |
| 2024 Q3 | REDUCED | 9,764 | -67,325 | -87.3% | 0.00% | $109K | — |
| 2024 Q1 | REDUCED | 77,089 | -9,341 | -10.8% | 0.00% | $1.2M | — |
| 2023 Q4 | ADDED | 86,430 | +77,474 | +865.1% | 0.00% | $1.4M | — |
| 2023 Q2 | INITIATED | 8,956 | — | — | 0.00% | $128K | — |
As of 2025 Q4 — sorted by position size