ATS CORPORATION (ATS)
Institutional ownership reported to the SEC as of Q2 2026, across 15 quarters.
136
Reporting holders
$2.3B
Reported value
81.3%
Of shares outstanding
0.4%
Held as options
+13
Holder change
Institutions report 78,807,473 shares against 96,885,705 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Share count carried from an earlier filing (cy2025q1i).
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| MASON CAPITAL MANAGEMENT LLC | $472.1M | 16,404,170 | 77.78% | 13q | HELD |
| ROYAL BANK OF CANADA | $226.8M | 7,881,423 | 0.03% | 13q | +1.5%+$3.4M |
| EdgePoint Investment Group Inc. | $201.7M | 7,004,577 | 1.52% | 13q | -2.3%-$4.7M |
| Hill City Capital, LP | $95.0M | 3,299,714 | 1.16% | 6q | +100.0%+$47.5M |
| TURTLE CREEK ASSET MANAGEMENT INC. | $88.8M | 3,084,567 | 3.47% | 13q | -37.0%-$52.2M |
| BANK OF MONTREAL /CAN/ | $88.2M | 3,062,973 | 0.03% | 13q | -1.7%-$1.5M |
| FMR LLC | $83.7M | 2,905,456 | 0.00% | 13q | +27.6%+$18.1M |
| FAIRFAX FINANCIAL HOLDINGS LTD/ CAN | $70.5M | 2,486,400 | 2.67% | 8q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $69.1M | 2,398,431 | 0.00% | 2q | +1.3%+$913.7K |
| Jupiter Topco LLC | $66.9M | 2,322,073 | 0.03% | new | FIRST |
| TD Waterhouse Canada Inc. | $47.4M | 1,683,683 | 0.12% | 13q | +3.0%+$1.4M |
| ACK Asset Management LLC | $43.2M | 1,500,000 | 5.04% | 15q | -18.8%-$10.0M |
| FIL Ltd | $38.2M | 1,326,851 | 0.03% | 3q | -25.4%-$13.0M |
| Alberta Investment Management Corp | $33.9M | 1,177,491 | 0.19% | 13q | +25.2%+$6.8M |
| Scheer, Rowlett & Associates Investment Management Ltd. | $33.8M | 1,175,268 | 2.43% | 7q | -0.6%-$192.0K |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | $32.5M | 795,619 | 0.25% | 5q | -7.9%-$2.8M |
| BANK OF AMERICA CORP /DE/ | $32.3M | 1,122,152 | 0.00% | 13q | +18.6%+$5.1M |
| Connor, Clark & Lunn Investment Management Ltd. | $31.4M | 1,089,460 | 0.06% | 13q | -51.9%-$33.8M |
| NORGES BANK | $31.2M | 1,084,181 | 0.00% | 11q | HELD |
| Clearbridge Investments, LLC | $30.5M | 1,060,487 | 0.03% | 13q | -2.8%-$886.5K |
| Legal & General Group Plc | $30.4M | 1,056,408 | 0.01% | 12q | +72.7%+$12.8M |
| TD Asset Management Inc | $28.9M | 1,003,596 | 0.03% | 13q | -29.4%-$12.1M |
| Marathon Asset Management Ltd | $27.5M | 954,485 | 1.12% | 5q | -12.7%-$4.0M |
| NATIONAL BANK OF CANADA /FI/ | $24.2M | 855,316 | 0.02% | 13q | +31.9%+$5.9M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $22.7M | 788,784 | 0.03% | 9q | +4.0%+$878.0K |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $22.1M | 540,733 | 0.01% | 13q | +1.3%+$277.0K |
| Public Sector Pension Investment Board | $21.8M | 756,002 | 0.03% | 4q | +111.9%+$11.5M |
| MACKENZIE FINANCIAL CORP | $21.5M | 524,774 | 0.02% | 13q | -14.9%-$3.7M |
| VANGUARD FIDUCIARY TRUST CO | $20.9M | 724,271 | 0.00% | 2q | -0.5%-$109.2K |
| Langdon Equity Partners | $17.3M | 600,000 | 9.66% | new | NEW |
| TORONTO DOMINION BANK | $13.8M | 406,916 | 0.02% | 13q | +336.7%+$10.7M |
| 1832 Asset Management L.P. | $10.2M | 355,745 | 0.01% | 13q | -11.4%-$1.3M |
| Waratah Capital Advisors Ltd. | $9.6M | 334,923 | 0.33% | 2q | +49.5%+$3.2M |
| CIBC WORLD MARKET INC. | $9.4M | 327,087 | 0.02% | 13q | -5.6%-$562.1K |
| ArrowMark Colorado Holdings LLC | $8.1M | 280,000 | 0.34% | 2q | +60.9%+$3.1M |
| Vanguard Global Advisers, LLC | $7.9M | 274,103 | 0.00% | 2q | +5.8%+$435.4K |
| Roubaix Capital, LLC | $7.1M | 246,909 | 2.55% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $7.0M | 243,525 | 0.00% | 9q | +2.0%+$140.4K |
| Sixth Street Partners Management Company, L.P. | $7.0M | 243,525 | 0.00% | new | NEW |
| MORGAN STANLEY | $6.7M | 234,236 | 0.00% | 13q | +133.3%+$3.9M |
| GOLDMAN SACHS GROUP INC | $6.4M | 223,762 | 0.00% | 13q | +328.2%+$4.9M |
| UBS Group AG | $6.4M | 222,553 | 0.00% | 13q | -2.2%-$146.1K |
| Dixon Mitchell Investment Counsel Inc. | $6.1M | 211,025 | 0.20% | 13q | HELD |
| SIG North Trading, ULC | $6.1M | 22,575 | 0.11% | 10q | -14.1%-$993.8K |
| SCOTIA CAPITAL INC. | $6.0M | 212,719 | 0.02% | 13q | +10.5%+$571.5K |
| JANE STREET GROUP, LLC | $5.7M | 199,635 | 0.00% | 3q | +141.6%+$3.4M |
| Granite Investment Partners, LLC | $5.6M | 195,894 | 0.29% | 7q | +13.2%+$658.0K |
| Focus Partners Wealth | $5.2M | 181,975 | 0.01% | 4q | HELD |
| FIRST TRUST ADVISORS LP | $5.2M | 181,592 | 0.00% | 11q | +17.6%+$783.7K |
| Swiss National Bank | $4.8M | 168,000 | 0.00% | 13q | +2.2%+$103.5K |
| DIMENSIONAL FUND ADVISORS LP | $4.8M | 167,149 | 0.00% | 10q | +36.5%+$1.3M |
| Candelo Capital Management LP | $4.8M | 165,100 | 2.93% | 3q | +8.8%+$386.6K |
| Delaney Capital Management Ltd. | $4.6M | 160,392 | 0.73% | 3q | +4.1%+$181.7K |
| NewGen Asset Management Ltd | $4.3M | 150,000 | 1.78% | new | NEW |
| CIBC Asset Management Inc | $4.0M | 138,246 | 0.01% | 13q | +3.0%+$116.8K |
| Front Street Capital Management, Inc. | $3.6M | 124,973 | 0.41% | 11q | -52.1%-$3.9M |
| LOUISBOURG INVESTMENTS INC. | $3.2M | 111,104 | 0.59% | 5q | +30.9%+$755.1K |
| Polar Asset Management Partners Inc. | $3.0M | 105,203 | 0.05% | new | NEW |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp | $2.9M | 101,546 | 0.02% | 13q | +44.2%+$896.2K |
| K.J. Harrison & Partners Inc | $2.9M | 100,000 | 0.41% | new | NEW |
| MONTRUSCO BOLTON INVESTMENTS INC. | $2.9M | 99,056 | 0.04% | 5q | -42.1%-$2.1M |
| SEI INVESTMENTS CO | $2.8M | 97,376 | 0.00% | 3q | -42.0%-$2.0M |
| PCJ Investment Counsel Ltd. | $2.5M | 85,640 | 0.71% | 2q | +71.3%+$1.0M |
| Canoe Financial LP | $2.4M | 83,024 | 0.03% | 14q | -5.0%-$126.9K |
| HALLSTATT ADVISORS L.P. | $2.4M | 83,020 | 1.68% | new | NEW |
| LAZARD ASSET MANAGEMENT LLC | $2.4M | 83,052 | 0.00% | 3q | +18.8%+$378.2K |
| CITADEL ADVISORS LLC | $2.4M | 82,308 | 0.00% | 11q | +1.3%+$30.8K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $2.1M | 73,654 | 0.00% | 13q | -0.6%-$13.7K |
| GEODE CAPITAL MANAGEMENT, LLC | $2.0M | 69,598 | 0.00% | 13q | +1.2%+$23.5K |
| VANGUARD ASSET MANAGEMENT, Ltd | $1.9M | 66,830 | 0.00% | 2q | HELD |
| CenterBook Partners LP | $1.9M | 65,180 | 0.09% | new | NEW |
| Nuveen, LLC | $1.8M | 62,584 | 0.00% | 6q | HELD |
| Caldwell Investment Management Ltd. | $1.7M | 60,800 | 1.15% | 10q | HELD |
| BOOTHBAY FUND MANAGEMENT, LLC | $1.7M | 59,867 | 0.02% | new | NEW |
| Verition Fund Management LLC | $1.7M | 59,026 | 0.00% | new | NEW |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $1.6M | 54,361 | 0.00% | 13q | +72.8%+$660.2K |
| Federation des caisses Desjardins du Quebec | $1.6M | 54,947 | 0.00% | 13q | -51.4%-$1.6M |
| VAN ECK ASSOCIATES CORP | $1.3M | 46,507 | 0.00% | 13q | +91.6%+$640.0K |
| GUARDIAN CAPITAL LP | $1.3M | 46,433 | 0.03% | 3q | -1.1%-$15.0K |
| INTACT INVESTMENT MANAGEMENT INC. | $1.2M | 40,489 | 0.03% | 2q | -24.2%-$371.8K |
| Aviso Financial Inc. | $1.2M | 40,111 | 0.04% | 9q | -12.3%-$162.8K |
| PenderFund Capital Management Ltd. | $1.1M | 37,700 | 0.14% | 4q | +88.5%+$510.2K |
| CITIGROUP INC | $1.1M | 36,651 | 0.00% | 13q | +36.7%+$283.4K |
| BANK OF NOVA SCOTIA TRUST CO | $1.0M | 35,291 | 0.08% | 8q | +2.8%+$27.6K |
| XTX Topco Ltd | $1.0M | 35,013 | 0.01% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.0M | 34,791 | 0.00% | new | NEW |
| AMERICAN CENTURY COMPANIES INC | $936.8K | 32,500 | 0.00% | new | NEW |
| Police & Firemen's Retirement System of New Jersey | $920.2K | 31,937 | 0.01% | 7q | +8.4%+$71.3K |
| Engineers Gate Manager LP | $902.6K | 31,363 | 0.01% | 2q | +140.3%+$527.0K |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $817.3K | 28,366 | 0.00% | 8q | +3.8%+$29.7K |
| FRANKLIN RESOURCES INC | $731.7K | 25,412 | 0.00% | 13q | -89.7%-$6.4M |
| Squarepoint Ops LLC | $712.6K | 24,760 | 0.00% | new | NEW |
| ExodusPoint Capital Management, LP | $636.0K | 22,100 | 0.00% | 2q | HELD |
| Vanguard Investments Australia, Ltd. | $630.5K | 21,874 | 0.00% | 2q | +13.2%+$73.8K |
| WELLS FARGO & COMPANY/MN | $568.3K | 19,748 | 0.00% | 4q | +555.2%+$481.6K |
| BARCLAYS PLC | $483.9K | 16,814 | 0.00% | 8q | +464.6%+$398.2K |
| ALLIANCEBERNSTEIN L.P. | $461.9K | 16,380 | 0.00% | 13q | +82.8%+$209.2K |
| Pictet Asset Management Holding SA | $460.7K | 15,987 | 0.00% | 12q | -2.7%-$12.6K |
| Purpose Unlimited Inc. | $454.1K | 15,754 | 0.02% | 3q | -44.9%-$369.3K |
| Northwest & Ethical Investments L.P. | $448.4K | 15,573 | 0.01% | 13q | +41.8%+$132.2K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-07 | 13G/A | Beutel, Goodman & Co Ltd. | 4.9% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 136 | $2.3B | 78,807,473 | 23 | 54 | 41 | 0.4% |
| Q1 2026 | 123 | $2.2B | 78,988,499 | 16 | 42 | 34 | 0.1% |
| Q4 2025 | 118 | $2.1B | 76,746,466 | 19 | 38 | 35 | 0.1% |
| Q3 2025 | 111 | $2.0B | 76,629,688 | 14 | 38 | 38 | 0.5% |
| Q2 2025 | 125 | $2.8B | 86,106,188 | 19 | 43 | 48 | 0.5% |
| Q1 2025 | 120 | $2.0B | 79,697,187 | 10 | 54 | 39 | 0.6% |
| Q4 2024 | 122 | $2.5B | 80,615,295 | 12 | 51 | 42 | 0.8% |
| Q3 2024 | 123 | $2.3B | 78,984,567 | 19 | 47 | 40 | 1.0% |
| Q2 2024 | 121 | $2.6B | 79,953,195 | 16 | 53 | 35 | 0.1% |
| Q1 2024 | 121 | $2.7B | 74,882,135 | 18 | 58 | 34 | 0.5% |
| Q4 2023 | 117 | $3.2B | 73,555,218 | 15 | 51 | 37 | 0.1% |
| Q3 2023 | 111 | $3.0B | 70,888,344 | 10 | 45 | 40 | 0.3% |
| Q2 2023 | 113 | $3.4B | 72,181,083 | 112 | 0 | 1 | 0.2% |
| Q1 2023 | 2 | $35.6M | 1,924,252 | 0 | 0 | 0 | 0.0% |
| Q4 2022 | 1 | $33.4K | 1,075,000 | 1 | 0 | 0 | 0.0% |