ATS Corp
ATS- Exchange
- NYSE
- Industry
- General Industrial Machinery & Equipment, NEC
- SEC CIK
- 0001394832
No open-market purchases or sales by ATS Corp insiders were filed in the last 90 days; 141 institutions reported holding it in 13F filings for Q2 2026, worth $2.37B in total; Fairfax Financial is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in ATS Corp as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 115
- −15 vs. Q2 2025
- Shares held
- 83.5M
- −2.25M (−2.6%) vs. Q2 2025
- Total value
- $2.20B
- −$539.7M (−19.7%) vs. Q2 2025
- New holders
- 15
- 41 more added
- Sold out
- 30
- 45 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 141 | $2.37B |
| Q1 2026 | 131 | $2.39B |
| Q4 2025 | 122 | $2.30B |
| Q3 2025 | 115 | $2.20B |
| Q2 2025 | 131 | $2.77B |
| Q1 2025 | 122 | $2.18B |
| Q4 2024 | 129 | $2.62B |
| Q3 2024 | 130 | $2.36B |
| Q2 2024 | 132 | $2.64B |
| Q1 2024 | 136 | $2.77B |
| Q4 2023 | 132 | $3.27B |
| Q3 2023 | 127 | $3.21B |
| Q2 2023 | 131 | $3.53B |
| Q1 2023 | 3 | $80.6M |
| Q4 2022 | 2 | $33.4M |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding ATS Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Mason Capital Management LLC | 15,563,568 | $407.8M | 82.99% | 00.0% | Unchanged |
| Royal Bank of Canada | 7,201,778 | $188.7M | 0.03% | +127,157+1.8% | Added |
| Turtle Creek Asset Management Inc. | 6,973,010 | $182.7M | 5.51% | −617,528−8.1% | Reduced |
| EdgePoint Investment Group Inc. | 6,381,294 | $166.9M | 1.25% | −52,711−0.8% | Reduced |
| Beutel, Goodman & Co Ltd. | 6,330,688 | $165.7M | 1.00% | −503,800−7.4% | Reduced |
| Vanguard Group Inc | 3,341,435 | $87.4M | 0.00% | +69,334+2.1% | Added |
| Fairfax Financial Holdings LtdSuperinvestorFairfax Financial | 2,486,400 | $64.1M | 3.11% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 2,053,472 | $53.7M | 0.17% | −315,556−13.3% | Reduced |
| Burgundy Asset Management Ltd. | 1,807,557 | $50.0M | 0.47% | −4,590−0.3% | Reduced |
| ACK Asset Management LLC | 1,846,196 | $48.4M | 6.05% | 00.0% | Unchanged |
| Hill City Capital, LP | 1,649,857 | $43.2M | 1.83% | +425,000+34.7% | Added |
| TD Waterhouse Canada Inc. | 1,430,232 | $37.4M | 0.24% | −22,088−1.5% | Reduced |
| FMR LLC | 1,375,587 | $36.0M | 0.00% | −29,425−2.1% | Reduced |
| Alberta Investment Management Corp | 1,340,265 | $35.1M | 0.25% | +572,665+74.6% | Added |
| Bank of America Corp | 1,251,695 | $32.8M | 0.00% | +389,862+45.2% | Added |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1,217,184 | $31.8M | 1.90% | +424,879+53.6% | Added |
| Invesco Ltd. | 1,196,732 | $31.4M | 0.00% | +8,505+0.7% | Added |
| TD Asset Management Inc | 1,181,762 | $30.9M | 0.03% | −97,117−7.6% | Reduced |
| Marathon Asset Mgmt Ltd | 1,166,007 | $30.5M | 1.12% | −68,954−5.6% | Reduced |
| Bank of Montreal | 1,142,653 | $29.9M | 0.01% | +44,229+4.0% | Added |
| Mackenzie Financial Corp | 1,138,559 | $29.8M | 0.04% | −272,274−19.3% | Reduced |
| Kempen Capital Management N.V. | 815,678 | $29.7M | 0.27% | +590,096+261.6% | Added |
| Clearbridge Investments, LLC | 1,130,381 | $29.6M | 0.02% | −716,655−38.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 1,109,230 | $29.0M | 0.05% | −3,744−0.3% | Reduced |
| Janus Henderson Group PLC | 898,343 | $23.5M | 0.01% | −23,821−2.6% | Reduced |
| Principal Financial Group Inc | 874,140 | $22.9M | 0.01% | +90,700+11.6% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 753,492 | $19.7M | 0.04% | −88,010−10.5% | Reduced |
| 1832 Asset Management L.P. | 738,731 | $19.4M | 0.03% | −85,827−10.4% | Reduced |
| Massachusetts Financial Services Co | 569,674 | $14.9M | 0.00% | −61,440−9.7% | Reduced |
| Goldman Sachs Group Inc | 507,885 | $13.3M | 0.00% | −48,690−8.7% | Reduced |
| Legal & General Group Plc | 494,609 | $13.0M | 0.00% | +56,169+12.8% | Added |
| Agf Management Ltd | 489,956 | $12.8M | 0.06% | 00.0% | Unchanged |
| Galibier Capital Management Ltd. | 447,446 | $11.7M | 3.90% | −38,929−8.0% | Reduced |
| National Bank of Canada | 420,025 | $10.8M | 0.01% | −18,993−4.3% | Reduced |
| Foresight Group Ltd Liability Partnership | 388,892 | $10.2M | 1.52% | +7,080+1.9% | Added |
| CIBC World Markets Inc. | 369,513 | $9.67M | 0.02% | −213−0.1% | Reduced |
| Jarislowsky, Fraser Ltd | 334,904 | $8.76M | 0.05% | −44,304−11.7% | Reduced |
| Front Street Capital Management, Inc. | 289,772 | $7.59M | 1.17% | −4,213−1.4% | Reduced |
| Montrusco Bolton Investments Inc. | 283,781 | $7.43M | 0.09% | −35,000−11.0% | Reduced |
| Van Berkom & Associates Inc. | 269,994 | $7.06M | 0.20% | +734+0.3% | Added |
| UBS Group AG | 231,595 | $6.07M | 0.00% | −25,623−10.0% | Reduced |
| Charles Schwab Investment Management Inc | 230,506 | $6.03M | 0.00% | +30,269+15.1% | Added |
| Roubaix Capital, LLC | 223,532 | $5.86M | 2.73% | +223,532 | New |
| Dixon Mitchell Investment Counsel Inc. | 218,525 | $5.72M | 0.20% | −183,600−45.7% | Reduced |
| D. E. Shaw & Co., Inc. | 217,900 | $5.70M | 0.00% | +159,328+272.0% | Added |
| Louisbourg Investments Inc. | 215,295 | $5.63M | 1.23% | +113,773+112.1% | Added |
| Granite Investment Partners, LLC | 205,847 | $5.39M | 0.31% | +52,807+34.5% | Added |
| Scotia Capital Inc. | 209,018 | $5.38M | 0.02% | +5,244+2.6% | Added |
| Federation des caisses Desjardins du Quebec | 195,234 | $5.04M | 0.02% | −71,734−26.9% | Reduced |
| Colony Group, LLC | 181,988 | $4.77M | 0.01% | +181,988 | New |
| Swiss National Bank | 160,100 | $4.19M | 0.00% | 00.0% | Unchanged |
| First Trust Advisors LP | 148,712 | $3.89M | 0.00% | +28,624+23.8% | Added |
| CIBC Asset Management Inc | 134,854 | $3.52M | 0.01% | +55,151+69.2% | Added |
| Royce & Associates LP | 134,500 | $3.52M | 0.04% | +9,000+7.2% | Added |
| Fiera Capital Corp | 93,159 | $2.44M | 0.01% | −39,210−29.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 91,611 | $2.40M | 0.01% | +64,332+235.8% | Added |
| Dimensional Fund Advisors LP | 89,223 | $2.34M | 0.00% | +12,161+15.8% | Added |
| Canoe Financial LP | 78,877 | $2.06M | 0.03% | −2,237−2.8% | Reduced |
| Toronto Dominion Bank | 77,955 | $2.05M | 0.00% | +34,715+80.3% | Added |
| Manufacturers Life Insurance Company, The | 76,460 | $2.00M | 0.00% | +13,299+21.1% | Added |
| Bastion Asset Management Inc. | 72,655 | $1.90M | 1.10% | +72,655 | New |
| Citadel Advisors LLC | 69,820 | $1.83M | 0.00% | +43,728+167.6% | Added |
| Morgan Stanley | 69,639 | $1.82M | 0.00% | −61,234−46.8% | Reduced |
| Nuveen, LLC | 62,584 | $1.64M | 0.00% | 00.0% | Unchanged |
| Public Sector Pension Investment Board | 61,906 | $1.62M | 0.01% | +61,906 | New |
| Caldwell Investment Management Ltd. | 60,800 | $1.60M | 1.05% | 00.0% | Unchanged |
| Aviso Financial Inc. | 52,243 | $1.37M | 0.06% | +1,590+3.1% | Added |
| Geode Capital Management, LLC | 50,232 | $1.32M | 0.00% | +4,377+9.5% | Added |
| Blackstone Group Inc. | 49,501 | $1.30M | 0.01% | +49,501 | New |
| British Columbia Investment Management Corp | 47,806 | $1.25M | 0.01% | −2,710−5.4% | Reduced |
| Millennium Management LLC | 43,821 | $1.15M | 0.00% | +43,821 | New |
| Russell Investments Group, Ltd. | 33,085 | $865.8K | 0.00% | +3,226+10.8% | Added |
| Main Management ETF Advisors, LLC | 29,450 | $772.0K | 0.03% | +29,450 | New |
| Lombard Odier Asset Management (Switzerland) SA | 21,515 | $771.1K | 0.04% | −18,057−45.6% | Reduced |
| Rockefeller Capital Management L.P. | 28,731 | $752.4K | 0.00% | −149−0.5% | Reduced |
| Amundi | 27,180 | $727.3K | 0.00% | 00.0% | Unchanged |
| Public Employees Retirement System of Ohio | 27,205 | $712.0K | 0.00% | +53+0.2% | Added |
| Bank of Nova Scotia Trust Co | 25,075 | $657.0K | 0.06% | +3,273+15.0% | Added |
| PenderFund Capital Management Ltd. | 20,000 | $523.2K | 0.09% | +20,000 | New |
| Standard Life Aberdeen plc | 18,595 | $489.4K | 0.00% | +2,390+14.7% | Added |
| Envestnet Asset Management Inc | 17,794 | $466.1K | 0.00% | −4,996−21.9% | Reduced |
| Citigroup Inc | 16,442 | $430.3K | 0.00% | +3,832+30.4% | Added |
| Franklin Resources Inc | 15,830 | $414.1K | 0.00% | −1,276−7.5% | Reduced |
| Pictet Asset Management Holding SA | 15,538 | $406.6K | 0.00% | +1,665+12.0% | Added |
| XTX Topco Ltd | 13,621 | $356.9K | 0.02% | +2,680+24.5% | Added |
| Stifel Financial Corp | 12,126 | $317.7K | 0.00% | +2,755+29.4% | Added |
| TRUE Private Wealth Advisors | 12,080 | $316.5K | 0.03% | 00.0% | Unchanged |
| Deutsche Bank AG | 10,888 | $285.3K | 0.00% | +923+9.3% | Added |
| Boothbay Fund Management, LLC | 10,170 | $266.1K | 0.01% | +3,496+52.4% | Added |
| Alliancebernstein L.P. | 9,820 | $257.3K | 0.00% | −4,180−29.9% | Reduced |
| Mariner, LLC | 9,024 | $236.4K | 0.00% | −6,616−42.3% | Reduced |
| Northwest & Ethical Investments L.P. | 8,613 | $225.4K | 0.01% | −20,930−70.8% | Reduced |
| Van Eck Associates Corp | 6,012 | $158.0K | 0.00% | +882+17.2% | Added |
| Quantbot Technologies LP | 4,665 | $122.2K | 0.00% | +4,665 | New |
| Barclays PLC | 4,508 | $118.1K | 0.00% | −17,120−79.2% | Reduced |
| State of Wyoming | 4,262 | $111.7K | 0.01% | +4,262 | New |
| Shell Asset Management Co | 1,302 | $34.0K | 0.00% | −3,029−69.9% | Reduced |
| Quarry LP | 1,238 | $32.4K | 0.01% | +1,238 | New |
| Tower Research Capital LLC (TRC) | 1,000 | $26.2K | 0.00% | −7,812−88.7% | Reduced |
| JPMorgan Chase & Co | 714 | $18.7K | 0.00% | +360+101.7% | Added |