| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 17 | 8 | 0.00% | 0.00% | 0.00% | Q1 2017 | Q3 2023 | 25 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| GROUP ONE TRADING, L.P. | 9 | 1 | 0.00% | 0.00% | 0.00% | Q1 2017 | Q3 2023 | 19 |
| JANE STREET GROUP, LLC | 6 | 6 | 0.00% | 0.00% | 0.00% | Q2 2022 | Q3 2023 | 6 |
| Penbrook Management LLC | 2 | 2 | 0.00% | 0.00% | 0.00% | Q2 2023 | Q3 2023 | 2 |
| CenterStar Asset Management, LLC | 2 | 2 | 0.03% | 0.04% | 0.05% | Q2 2023 | Q3 2023 | 2 |
This page lists all the filers that currently own AXCELIS TECHNOLOGIES INC or have owned AXCELIS TECHNOLOGIES INC in the past.