AtsATS
13F holders, Q2 2026 (June 30)141holders +10
22new positions
13sold out
3famous investors
$29.04avg. 13F price*
At the end of Q2 2026, 141 institutions reported holding Ats Corp. (ATS) in their 13F filings, up 10 from Q1 2026. 22 opened new positions and 13 sold out. The largest holders were Mason Capital Management LLC ($472.1M), Royal Bank of Canada ($226.8M) and EdgePoint Investment Group Inc. ($201.7M). 3 famous investors held it, including Prem Watsa (2.7% of Fairfax Financial Holdings's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Joel Greenblatt (0.0% of Gotham Asset Management's portfolio).
- Company
- Ats Corp.
- CUSIP
- 00217Y104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 22 | $45.9M |
| Exits | 13 | $61.8M |
All 13F filers, Q1 2026 → Q2 2026: 4,924,760 shares bought and 9,514,640 shares sold, net −4,589,880 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 141 holders
| Mason Capital Management LLC | 77.78% | No change | 16,404,170 | $472.1M |
| Royal Bank of Canada | 0.04% | Add +1.5% | 7,881,423 | $226.8M |
| EdgePoint Investment Group Inc. | 1.52% | Reduce -2.3% | 7,004,577 | $201.7M |
| Beutel, Goodman & Co Ltd. | 1.02% | Reduce -12.1% | 4,796,922 | $138.2M |
| Turtle Creek Asset Management Inc. | 3.47% | Reduce -37.0% | 3,084,567 | $88.8M |
| Bank of Montreal | 0.03% | Reduce -1.7% | 3,062,973 | $88.2M |
| FMR LLC | 0.00% | Add +27.6% | 2,905,456 | $83.7M |
| Fairfax Financial Holdings | 2.67% | No change | 2,486,400 | $70.5M |
| Vanguard Capital Management LLC | 0.00% | Add +1.3% | 2,398,431 | $69.1M |
| Jupiter Topco LLC | 0.03% | — | 2,322,073 | $66.9M |
| Hill City Capital, LP | 1.11% | No change | 1,649,857 | $47.5M |
| TD Waterhouse Canada Inc. | 0.12% | Add +3.0% | 1,683,683 | $47.4M |
| ACK Asset Management LLC | 5.04% | Reduce -18.8% | 1,500,000 | $43.2M |
| FIL Ltd | 0.03% | Reduce -25.4% | 1,326,851 | $38.2M |
| Alberta Investment Management Corp | 0.22% | Add +25.2% | 1,177,491 | $33.9M |
| Scheer, Rowlett & Associates Investment Management Ltd. | 2.43% | Reduce -0.6% | 1,175,268 | $33.8M |
| Van Lanschot Kempen Investment Management N.V. | 0.25% | Reduce -7.9% | 795,619 | $32.5M |
| Bank of America Corp. | 0.00% | Add +18.6% | 1,122,152 | $32.3M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.06% | Reduce -51.9% | 1,089,460 | $31.4M |
| Norges Bank | 0.00% | — | 1,084,181 | $31.2M |
| Clearbridge Investments, LLC | 0.03% | Reduce -2.8% | 1,060,487 | $30.5M |
| Legal & General Group Plc | 0.01% | Add +72.7% | 1,056,408 | $30.4M |
| TD Asset Management Inc | 0.03% | Reduce -29.4% | 1,003,596 | $28.9M |
| Marathon Asset Management Ltd | 1.12% | Reduce -12.8% | 954,485 | $27.5M |
| National Bank of Canada | 0.02% | Add +31.9% | 855,316 | $24.2M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.03% | Add +4.0% | 788,784 | $22.7M |
| Massachusetts Financial Services Co. | 0.01% | Add +1.3% | 540,733 | $22.1M |
| Mackenzie Financial Corp. | 0.02% | Reduce -14.9% | 524,774 | $21.5M |
| Vanguard Fiduciary Trust Co. | 0.00% | Reduce -0.5% | 724,271 | $20.9M |
| Langdon Equity Partners | 9.66% | New | 600,000 | $17.3M |
| Toronto Dominion Bank | 0.02% | Add +336.7% | 406,916 | $11.7M |
| Public Sector Pension Investment Board | 0.03% | Add +5.9% | 378,001 | $10.9M |
| 1832 Asset Management L.P. | 0.01% | Reduce -11.4% | 355,745 | $10.2M |
| Waratah Capital Advisors Ltd. | 0.74% | Add +49.5% | 334,923 | $9.6M |
| Cibc World Market Inc. | 0.02% | Reduce -5.6% | 327,087 | $9.4M |
| ArrowMark Colorado Holdings LLC | 0.34% | Add +60.9% | 280,000 | $8.1M |
| Vanguard Global Advisers, LLC | 0.00% | Add +5.8% | 274,103 | $7.9M |
| Roubaix Capital, LLC | 2.55% | New | 246,909 | $7.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +2.0% | 243,525 | $7.0M |
| Morgan Stanley | 0.00% | Add +133.3% | 234,236 | $6.7M |
| Goldman Sachs Group Inc. | 0.00% | Add +328.2% | 223,762 | $6.4M |
| UBS Group AG | 0.00% | Reduce -2.2% | 222,553 | $6.4M |
| Dixon Mitchell Investment Counsel Inc. | 0.20% | No change | 211,025 | $6.1M |
| Scotia Capital Inc. | 0.02% | Add +10.5% | 212,719 | $6.0M |
| Jane Street Group, LLC | 0.00% | Add +141.6% | 199,635 | $5.7M |
| Granite Investment Partners, LLC | 0.29% | Add +13.2% | 195,894 | $5.6M |
| Van Berkom & Associates Inc. | 0.17% | Reduce -26.9% | 188,066 | $5.4M |
| Focus Partners Wealth | 0.01% | No change | 181,975 | $5.2M |
| First Trust Advisors LP | 0.00% | Add +17.6% | 181,592 | $5.2M |
| Swiss National Bank | 0.00% | Add +2.2% | 168,000 | $4.8M |
| Dimensional Fund Advisors LP | 0.00% | Add +36.5% | 167,149 | $4.8M |
| Candelo Capital Management LP | 3.49% | Add +8.8% | 165,100 | $4.8M |
| Delaney Capital Management Ltd. | 0.73% | Add +4.1% | 160,392 | $4.6M |
| NewGen Asset Management Ltd | 2.37% | New | 150,000 | $4.3M |
| CIBC Asset Management Inc | 0.01% | Add +3.0% | 138,246 | $4.0M |
| Front Street Capital Management, Inc. | 0.41% | Reduce -52.1% | 124,973 | $3.6M |
| Harbor Capital Advisors, Inc. | 0.23% | Add +11.7% | 115,198 | $3.3M |
| Louisbourg Investments Inc. | 0.59% | Add +30.9% | 111,104 | $3.2M |
| Polar Asset Management Partners Inc. | 0.07% | New | 105,203 | $3.0M |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp | 0.02% | Add +44.2% | 101,546 | $2.9M |
| K.J. Harrison & Partners Inc | 0.41% | New | 100,000 | $2.9M |
| Montrusco Bolton Investments Inc. | 0.04% | Reduce -42.1% | 99,056 | $2.9M |
| Sei Investments Co. | 0.00% | Reduce -42.0% | 97,376 | $2.8M |
| PCJ Investment Counsel Ltd. | 0.71% | Add +71.3% | 85,640 | $2.5M |
| Canoe Financial LP | 0.03% | Reduce -5.0% | 83,024 | $2.4M |
| Hallstatt Advisors L.P. | 1.68% | New | 83,020 | $2.4M |
| Lazard Asset Management LLC | 0.00% | Add +18.8% | 83,052 | $2.4M |
| Citadel Advisors | 0.00% | Add +1.3% | 82,308 | $2.4M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -0.6% | 73,654 | $2.1M |
| Geode Capital Management, LLC | 0.00% | Add +1.2% | 69,598 | $2.0M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 66,830 | $1.9M |
| CenterBook Partners LP | 0.09% | New | 65,180 | $1.9M |
| Nuveen, LLC | 0.00% | No change | 62,584 | $1.8M |
| Caldwell Investment Management Ltd. | 1.15% | No change | 60,800 | $1.7M |
| Boothbay Fund Management, LLC | 0.03% | New | 59,867 | $1.7M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +72.8% | 54,361 | $1.6M |
| Federation des caisses Desjardins du Quebec | 0.00% | Reduce -51.4% | 54,947 | $1.6M |
| Van Eck Associates Corp. | 0.00% | Add +91.6% | 46,507 | $1.3M |
| Guardian Capital LP | 0.03% | Reduce -1.1% | 46,433 | $1.3M |
| Intact Investment Management Inc. | 0.03% | Reduce -24.2% | 40,489 | $1.2M |
| Aviso Financial Inc. | 0.04% | Reduce -12.3% | 40,111 | $1.2M |
| PenderFund Capital Management Ltd. | 0.49% | Add +88.5% | 37,700 | $1.1M |
| Citigroup Inc. | 0.00% | Add +36.7% | 36,651 | $1.1M |
| Bank of Nova Scotia Trust Co. | 0.08% | Add +2.8% | 35,291 | $1.0M |
| XTX Topco Ltd | 0.01% | New | 35,013 | $1.0M |
| Susquehanna International Group, LLP | 0.00% | New | 34,791 | $1.0M |
| American Century Companies Inc. | 0.00% | New | 32,500 | $937K |
| Engineers Gate Manager LP | 0.01% | Add +140.3% | 31,363 | $903K |
| Verition Fund Management LLC | 0.01% | New | 29,513 | $849K |
| Public Employees Retirement System of Ohio | 0.00% | Add +3.8% | 28,366 | $817K |
| Franklin Resources Inc. | 0.00% | Reduce -89.7% | 25,412 | $732K |
| Squarepoint Ops LLC | 0.00% | New | 24,760 | $713K |
| SIG North Trading, ULC | 0.12% | Reduce -14.1% | 22,575 | $650K |
| ExodusPoint Capital Management, LP | 0.01% | Add +0.2% | 22,100 | $636K |
| Vanguard Investments Australia, Ltd. | 0.00% | Add +13.3% | 21,874 | $630K |
| Wells Fargo & Company | 0.00% | Add +1210.4% | 19,748 | $568K |
| Barclays PLC | 0.00% | Add +464.6% | 16,814 | $484K |
| Alliancebernstein L.P. | 0.00% | Add +82.8% | 16,380 | $462K |
| Pictet Asset Management Holding SA | 0.00% | Reduce -2.6% | 15,987 | $461K |
| Purpose Unlimited Inc. | 0.02% | Reduce -44.9% | 15,754 | $454K |
"% of holder's portfolio" is ATS's weight in each manager's 13F, not the share of Ats Corp. the manager owns.