ATS CORPORATION ATS
COM · Common Stock · CUSIP 00217Y104 · ISIN CA00217Y1043
- SectorIndustrials
- IndustryGeneral Industrial Machinery & Equipment, NEC
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.4m this quarter). Holder counts are more reliable. Shares outstanding: 96.9m as of 2025-03-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $31.90. Options: 6 managers hold calls ($2.9m notional), 6 hold puts ($9.8m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q4 2022 | 1 |
| Q1 2023 | 2 |
| Q2 2023 | 132 |
| Q3 2023 | 129 |
| Q4 2023 | 134 |
| Q1 2024 | 138 |
| Q2 2024 | 133 |
| Q3 2024 | 131 |
| Q4 2024 | 130 |
| Q1 2025 | 123 |
| Q2 2025 | 132 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 67 | 56 |
| Q4 2023 | 73 | 56 |
| Q1 2024 | 86 | 55 |
| Q2 2024 | 76 | 59 |
| Q3 2024 | 74 | 62 |
| Q4 2024 | 69 | 62 |
| Q1 2025 | 68 | 60 |
| Q2 2025 | 69 | 63 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $18.8m | $4.5m | 0.24 |
| Q4 2024 | $7.6m | $10.5m | 1.39 |
| Q1 2025 | $8.9m | $3.4m | 0.38 |
| Q2 2025 | $2.9m | $9.8m | 3.40 |
Biggest buyers
| ROYAL BANK OF CANADA | Added | +7.7m |
| EdgePoint Investment Group Inc. | Added | +1.4m |
| Marathon Asset Management Ltd | New | +1.2m |
| Connor, Clark & Lunn Investment Management Ltd. | Added | +392.9k |
| MONTRUSCO BOLTON INVESTMENTS INC. | New | +318.8k |
| PICTON MAHONEY ASSET MANAGEMENT | New | +279.8k |
| Clearbridge Investments, LLC | Added | +245.4k |
| JARISLOWSKY, FRASER Ltd | Added | +241.7k |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | New | +225.6k |
| MACKENZIE FINANCIAL CORP | Added | +210.6k |
Biggest sellers
| FIL Ltd | Reduced | -781.0k |
| TURTLE CREEK ASSET MANAGEMENT INC. | Reduced | -711.0k |
| Fiera Capital Corp | Reduced | -590.7k |
| Canoe Financial LP | Reduced | -532.2k |
| NICOLA WEALTH MANAGEMENT LTD. | Sold out | -523.3k |
| Rockefeller Capital Management L.P. | Reduced | -402.6k |
| Heathbridge Capital Management Ltd. | Sold out | -323.3k |
| Galibier Capital Management Ltd. | Reduced | -320.6k |
| Allspring Global Investments Holdings, LLC | Sold out | -251.1k |
| Select Equity Group, L.P. | Sold out | -242.6k |
Biggest calls
| SIG North Trading, ULC | Reduced | $2.3m73.0k shares |
| CITADEL ADVISORS LLC | Added | $468.6k14.7k shares |
| TORONTO DOMINION BANK | Unchanged | $79.8k2.5k shares |
| GROUP ONE TRADING LLC | Unchanged | $6.4k200 shares |
| SIMPLEX TRADING, LLC | Reduced | $3.0k100 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| BANK OF MONTREAL /CAN/ | New | $8.3m259.9k shares |
| SIG North Trading, ULC | Added | $1.3m41.8k shares |
| TORONTO DOMINION BANK | Reduced | $111.7k3.5k shares |
| WOLVERINE ASSET MANAGEMENT LLC | New | $63.8k2.0k shares |
| SIMPLEX TRADING, LLC | New | $15.0k500 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| ROYAL BANK OF CANADA 13G · institution +1.4 pts · filed 2026-02-13 | 6.6% |
| EdgePoint Investment Group Inc. 13G · institution +1.5 pts · filed 2025-08-14 | 6.6% |
| Beutel, Goodman & Co Ltd. 13G · institution +1.5 pts · filed 2026-10-06 | 6.4% |
Fell to 5% or below in the last year: Turtle Creek Asset Management Inc. (5.0%, 2026-05-15)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| MASON CAPITAL MANAGEMENT LLC 97.00% of their portfolio | 15.6m $496.2m | Unchanged |
| ROYAL BANK OF CANADA 0.04% of their portfolio | 14.1m $451.1m | Added +7.7m |
| TURTLE CREEK ASSET MANAGEMENT INC. 7.02% of their portfolio | 7.6m $242.0m | Reduced -711.0k |
| Beutel, Goodman & Co Ltd. 1.24% of their portfolio | 6.8m $217.5m | Reduced -217.8k |
| EdgePoint Investment Group Inc. 1.55% of their portfolio | 6.4m $205.3m | Added +1.4m |
| VANGUARD GROUP INC 0.00% of their portfolio | 3.3m $104.4m | Added +51.5k |
| FAIRFAX FINANCIAL HOLDINGS LTD/ CAN 4.23% of their portfolio | 2.5m $79.1m | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. 0.27% of their portfolio | 2.4m $75.6m | Added +392.9k |
| Clearbridge Investments, LLC 0.05% of their portfolio | 1.8m $58.9m | Added +245.4k |
| ACK Asset Management LLC 7.73% of their portfolio | 1.8m $58.9m | Reduced -167.0k |
| Burgundy Asset Management Ltd. 0.56% of their portfolio | 1.8m $57.7m | Added +43.4k |
| TD Waterhouse Canada Inc. 0.33% of their portfolio | 1.5m $46.4m | Reduced -220.8k |
| MACKENZIE FINANCIAL CORP 0.06% of their portfolio | 1.4m $45.0m | Added +210.6k |
| FMR LLC 0.00% of their portfolio | 1.4m $44.8m | Reduced -81.6k |
| TD Asset Management Inc 0.03% of their portfolio | 1.3m $40.7m | Added +122.0k |
| Marathon Asset Management Ltd 1.26% of their portfolio | 1.2m $39.3m | New |
| Hill City Capital, LP 2.10% of their portfolio | 1.2m $39.0m | Reduced -75.0k |
| Capital World Investors 0.01% of their portfolio | 1.2m $38.1m | Unchanged |
| Invesco Ltd. 0.01% of their portfolio | 1.2m $37.9m | Reduced -213.9k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.07% of their portfolio | 1.1m $35.4m | Added +1.2k |
| BANK OF MONTREAL /CAN/ 0.02% of their portfolio | 1.1m $35.1m | Added +52.9k |
| NORGES BANK 0.00% of their portfolio | 1.0m $32.8m | Unchanged |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 922.2k $29.4m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 861.8k $27.5m | Reduced -194.1k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.05% of their portfolio | 841.5k $26.9m | Added +200.3k |
| 1832 Asset Management L.P. 0.05% of their portfolio | 824.6k $26.3m | Reduced -20.5k |
| Scheer, Rowlett & Associates Investment Management Ltd. 1.64% of their portfolio | 792.3k $25.3m | Added +159.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 783.4k $24.9m | Added +86.6k |
| Alberta Investment Management Corp 0.19% of their portfolio | 767.6k $24.5m | Reduced -198.5k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 631.1k $20.1m | Added +118.0k |
| MOORE CAPITAL MANAGEMENT, LP 0.39% of their portfolio | 611.1k $19.5m | Reduced -111.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 556.6k $17.7m | Added +122.5k |
| AGF MANAGEMENT LTD 0.07% of their portfolio | 490.0k $15.6m | Reduced -51.8k |
| Galibier Capital Management Ltd. 4.65% of their portfolio | 486.4k $15.5m | Reduced -320.6k |
| NATIONAL BANK OF CANADA /FI/ 0.02% of their portfolio | 439.0k $14.0m | Added +16.7k |
| Legal & General Group Plc 0.00% of their portfolio | 438.4k $14.0m | Reduced -22.8k |
| Dixon Mitchell Investment Counsel Inc. 0.50% of their portfolio | 402.1k $12.8m | Added +46.0k |
| Foresight Group Ltd Liability Partnership 1.72% of their portfolio | 381.8k $12.2m | Reduced -4.5k |
| JARISLOWSKY, FRASER Ltd 0.07% of their portfolio | 379.2k $12.1m | Added +241.7k |
| CIBC WORLD MARKET INC. 0.03% of their portfolio | 369.7k $11.8m | Added +23.5k |
| MONTRUSCO BOLTON INVESTMENTS INC. 0.11% of their portfolio | 318.8k $10.1m | New |
| Front Street Capital Management, Inc. 1.80% of their portfolio | 294.0k $9.4m | Added +5.0k |
| PICTON MAHONEY ASSET MANAGEMENT 0.13% of their portfolio | 279.8k $8.9m | New |
| Van Berkom & Associates Inc. 0.26% of their portfolio | 269.3k $8.6m | Added +37.5k |
| Federation des caisses Desjardins du Quebec 0.04% of their portfolio | 267.0k $8.5m | Reduced -216.5k |
| UBS Group AG 0.00% of their portfolio | 257.2k $8.2m | Reduced -79.5k |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. 0.09% of their portfolio | 225.6k $9.8m | New |
| SCOTIA CAPITAL INC. 0.03% of their portfolio | 203.8k $6.5m | Added +7.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 200.2k $6.4m | Reduced -373 |
| Swiss National Bank 0.00% of their portfolio | 160.1k $5.1m | Reduced -2.2k |
| Granite Investment Partners, LLC 0.24% of their portfolio | 153.0k $4.9m | Reduced -4.6k |
| Fiera Capital Corp 0.01% of their portfolio | 132.4k $4.2m | Reduced -590.7k |
| MORGAN STANLEY 0.00% of their portfolio | 130.9k $4.2m | Reduced -170.8k |
| ROYCE & ASSOCIATES LP 0.04% of their portfolio | 125.5k $4.0m | Added +5.0k |
| Lombard Odier Asset Management (Europe) Ltd 0.28% of their portfolio | 122.1k $3.9m | Added +7.8k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 120.1k $3.8m | Added +3.4k |
| Waratah Capital Advisors Ltd. 0.26% of their portfolio | 118.5k $3.8m | Added +11.3k |
| LOUISBOURG INVESTMENTS INC. 0.76% of their portfolio | 101.5k $3.2m | New |
| NATIXIS ADVISORS, LLC 0.01% of their portfolio | 98.9k $3.2m | Added +12.8k |
| Canoe Financial LP 0.04% of their portfolio | 81.1k $2.6m | Reduced -532.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 81.0k $2.6m | Reduced -924 |
| CIBC Asset Management Inc 0.01% of their portfolio | 79.7k $2.5m | Reduced -23.7k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 77.1k $2.5m | Added +33.5k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 63.2k $2.0m | Reduced -59.9k |
| Nuveen, LLC 0.00% of their portfolio | 62.6k $2.0m | Reduced -3.5k |
| Caldwell Investment Management Ltd. 1.68% of their portfolio | 60.8k $1.9m | Unchanged |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 58.6k $1.9m | Added +27.7k |
| Aviso Financial Inc. 0.07% of their portfolio | 50.7k $1.6m | Added +452 |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp 0.01% of their portfolio | 50.5k $1.6m | Added +3.6k |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 47.0k $1.5m | Reduced -402.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 45.9k $1.5m | Added +2.6k |
| TORONTO DOMINION BANK 0.00% of their portfolio | 43.2k $1.4m | Reduced -17.3k |
| Lombard Odier Asset Management (Switzerland) SA 0.06% of their portfolio | 39.6k $1.3m | New |
| FIL Ltd 0.00% of their portfolio | 35.4k $1.1m | Reduced -781.0k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 32.2k $1.0m | Reduced -9.9k |
| Ewing Morris & Co. Investment Partners Ltd. 0.45% of their portfolio | 31.6k $1.0m | Added +3.3k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 29.9k $950.4k | Reduced -50.4k |
| Northwest & Ethical Investments L.P. 0.02% of their portfolio | 29.5k $941.4k | Added +21.2k |
| Trexquant Investment LP 0.01% of their portfolio | 28.8k $918.2k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 28.1k $895.3k | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 27.3k $868.2k | Added +4.2k |
| Amundi 0.00% of their portfolio | 27.2k $888.0k | Reduced -3.4k |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio | 27.2k $864.3k | Reduced -2.6k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 26.1k $831.8k | New |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 22.8k $726.3k | Reduced -103.5k |
| BANK OF NOVA SCOTIA TRUST CO 0.07% of their portfolio | 21.8k $695.0k | Added +4.1k |
| BARCLAYS PLC 0.00% of their portfolio | 21.6k $689.5k | Reduced -172 |
| Onex Canada Asset Management Inc. 0.07% of their portfolio | 19.1k $607.5k | Reduced -24.2k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 17.1k $545.9k | Added +1.2k |
| Aberdeen Group plc 0.00% of their portfolio | 16.2k $516.6k | Added +2.9k |
| Mariner, LLC 0.00% of their portfolio | 15.6k $498.6k | Reduced -1.8k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 14.0k $446.3k | Unchanged |
| Pictet Asset Management Holding SA 0.00% of their portfolio | 13.9k $441.6k | Reduced -226 |
| CITIGROUP INC 0.00% of their portfolio | 12.6k $401.4k | Added +4.2k |
| TRUE Private Wealth Advisors 0.04% of their portfolio | 12.1k $385.1k | Unchanged |
| Nebula Research & Development LLC 0.03% of their portfolio | 11.3k $359.7k | Reduced -3.4k |
| XTX Topco Ltd 0.01% of their portfolio | 10.9k $348.8k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 10.8k $343.5k | Reduced -467 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 10.0k $317.7k | Added +2.3k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 9.4k $298.8k | New |