Which hedge funds own ATS? ATS CORPORATION, Q2 2026 13F holders
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20 of the hedge funds tracked by WhaleCreep disclosed a position in ATS (ATS CORPORATION) in their Q2 2026 13F filings, worth $700.2m in total. The largest holder by portfolio weight is Mason Capital Management LLC at 77.8% of its book. 8 managers opened a new position this quarter: Roubaix Capital, LLC, NewGen Asset Management LTD, Hallstatt Advisors L.P., CenterBook Partners LP. 5 exited: Balyasny Asset Management L.P., Brevan Howard Capital Management LP, D. E. Shaw & Co., Inc..
20tracked managers holding
8opened this quarter
5exited this quarter
Which hedge funds hold ATS? Current holders by portfolio weight
| Manager | As of | Weight of book | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|
| Mason Capital Management LLC | Q2 2026 | 77.8% | $472.1m | 16,404,170 | 0% | held |
| Ack Asset Management LLC | Q2 2026 | 5.0% | $43.2m | 1,500,000 | -19% | reduced |
| Candelo Capital Management LP | Q2 2026 | 3.5% | $4.8m | 165,100 | 9% | added |
| Turtle Creek Asset Management Inc. | Q2 2026 | 3.5% | $88.8m | 3,084,567 | -37% | reduced |
| Roubaix Capital, LLC | Q2 2026 | 2.5% | $7.1m | 246,909 | – | new |
| NewGen Asset Management LTD | Q2 2026 | 2.4% | $4.3m | 150,000 | – | new |
| Hallstatt Advisors L.P. | Q2 2026 | 1.7% | $2.4m | 83,020 | – | new |
| Hill City Capital, LP | Q2 2026 | 1.1% | $47.5m | 1,649,857 | 0% | held |
| Waratah Capital Advisors Ltd. | Q2 2026 | 0.7% | $9.6m | 334,923 | 50% | added |
| ArrowMark Colorado Holdings LLC | Q2 2026 | 0.3% | $8.1m | 280,000 | 61% | added |
| CenterBook Partners LP | Q2 2026 | 0.1% | $1.9m | 65,180 | – | new |
| Polar Asset Management Partners Inc. | Q2 2026 | 0.1% | $3.0m | 105,203 | – | new |
| Boothbay Fund Management, LLC | Q2 2026 | 0.0% | $1.7m | 59,867 | – | new |
| Campbell & CO Investment Adviser LLC | Q2 2026 | 0.0% | $244.7k | 8,503 | 1% | added |
| Engineers Gate Manager LP | Q2 2026 | 0.0% | $902.6k | 31,363 | 140% | added |
| Verition Fund Management LLC | Q2 2026 | 0.0% | $849.4k | 29,513 | – | new |
| ExodusPoint Capital Management, LP | Q2 2026 | 0.0% | $636.0k | 22,100 | 0% | held |
| Squarepoint Ops LLC | Q2 2026 | 0.0% | $712.6k | 24,760 | – | new |
| Citadel Advisors LLC | Q2 2026 | 0.0% | $2.4m | 82,308 | 1% | added |
| Hillsdale Investment Management Inc. | Q2 2026 | 0.0% | $25.9k | 900 | 50% | added |
Exited since the previous quarter
| Manager | Prior weight | Prior value |
|---|---|---|
| Balyasny Asset Management L.P. | 0.0% | $398.3k |
| Brevan Howard Capital Management LP | 0.0% | $237.6k |
| D. E. Shaw & Co., Inc. | 0.0% | $851.0k |
| Marshall Wace, LLP | 0.0% | $279.7k |
| Numerai GP LLC | 0.4% | $776.6k |
How has hedge fund ownership of ATS changed?
| Quarter | Managers holding | Combined value |
|---|---|---|
| Q2 2026 | 20 | $700.2m |
| Q1 2026 | 17 | $720.8m |
| Q2 2025 | 1 | $19.5m |
| Q1 2025 | 1 | $18.0m |
| Q1 2024 | 1 | $643.0k |
| Q4 2023 | 1 | $1.5m |
| Q3 2023 | 1 | $3.8m |
| Q2 2023 | 1 | $474.0k |
Counts every tracked manager that disclosed ATS in that quarter's filing, including managers that have since stopped filing.