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, Q4 2025
Institutional positions in ATS Corp as of Dec 31, 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
- 122
- +11 vs. Q3 2025
- Shares held
- 83.2M
- +2.23M (+2.8%) vs. Q3 2025
- Total value
- $2.30B
- +$173.0M (+8.1%) vs. Q3 2025
- New holders
- 24
- 41 more added
- Sold out
- 13
- 42 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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 | $2.40B |
| Q4 2025 | 122 | $2.30B |
| Q3 2025 | 115 | $2.20B |
| Q2 2025 | 131 | $3.00B |
| Q1 2025 | 122 | $2.18B |
| Q4 2024 | 129 | $2.69B |
| Q3 2024 | 130 | $2.36B |
| Q2 2024 | 132 | $2.65B |
| Q1 2024 | 136 | $2.81B |
| Q4 2023 | 132 | $3.30B |
| 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, Q4 2025
Shares, value and share of portfolio for each institution holding ATS Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Mason Capital Management LLC | 15,563,568 | $428.6M | 76.32% | 00.0% | Unchanged |
| Royal Bank of Canada | 7,644,547 | $210.5M | 0.04% | +442,769+6.1% | Added |
| EdgePoint Investment Group Inc. | 6,888,785 | $189.8M | 1.56% | +507,491+8.0% | Added |
| Beutel, Goodman & Co Ltd. | 5,837,138 | $161.0M | 0.99% | −493,550−7.8% | Reduced |
| Turtle Creek Asset Management Inc. | 5,642,052 | $155.4M | 6.84% | −1,330,958−19.1% | Reduced |
| Vanguard Group Inc | 3,397,166 | $93.6M | 0.00% | +55,731+1.7% | Added |
| Bank of Montreal | 3,022,693 | $83.3M | 0.03% | +1,880,040+164.5% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 2,485,638 | $68.5M | 0.18% | +432,166+21.0% | Added |
| Fairfax Financial Holdings LtdSuperinvestorFairfax Financial | 2,486,400 | $68.3M | 3.28% | 00.0% | Unchanged |
| FMR LLC | 2,117,766 | $58.3M | 0.00% | +742,179+54.0% | Added |
| ACK Asset Management LLC | 1,846,196 | $50.8M | 6.38% | 00.0% | Unchanged |
| Hill City Capital, LP | 1,649,857 | $45.4M | 1.72% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 1,340,265 | $36.9M | 0.22% | 00.0% | Unchanged |
| Invesco Ltd. | 1,272,222 | $35.0M | 0.00% | +75,490+6.3% | Added |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1,226,450 | $33.8M | 2.32% | +9,266+0.8% | Added |
| TD Asset Management Inc | 1,193,208 | $32.9M | 0.03% | +11,446+1.0% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 1,141,835 | $31.5M | 0.05% | +32,605+2.9% | Added |
| Kempen Capital Management N.V. | 815,031 | $30.8M | 0.26% | −647−0.1% | Reduced |
| Clearbridge Investments, LLC | 1,111,485 | $30.6M | 0.02% | −18,896−1.7% | Reduced |
| Bank of America Corp | 1,100,381 | $30.3M | 0.00% | −151,314−12.1% | Reduced |
| Marathon Asset Mgmt Ltd | 1,097,711 | $30.3M | 1.16% | −68,296−5.9% | Reduced |
| Norges Bank | 1,079,090 | $29.7M | 0.00% | +1,079,090 | New |
| TD Waterhouse Canada Inc. | 966,349 | $26.5M | 0.16% | −463,883−32.4% | Reduced |
| Principal Financial Group Inc | 878,240 | $24.2M | 0.01% | +4,100+0.5% | Added |
| Janus Henderson Group PLC | 861,839 | $23.8M | 0.01% | −36,504−4.1% | Reduced |
| 1832 Asset Management L.P. | 818,559 | $22.5M | 0.03% | +79,828+10.8% | Added |
| Mackenzie Financial Corp | 758,980 | $21.1M | 0.02% | −379,579−33.3% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 753,492 | $20.8M | 0.04% | 00.0% | Unchanged |
| Massachusetts Financial Services Co | 558,675 | $15.4M | 0.00% | −10,999−1.9% | Reduced |
| Legal & General Group Plc | 542,023 | $14.9M | 0.00% | +47,414+9.6% | Added |
| National Bank of Canada | 418,332 | $11.5M | 0.01% | −1,693−0.4% | Reduced |
| Agf Management Ltd | 400,140 | $11.0M | 0.05% | −89,816−18.3% | Reduced |
| CIBC World Markets Inc. | 354,069 | $9.75M | 0.02% | −15,444−4.2% | Reduced |
| Public Sector Pension Investment Board | 287,829 | $7.93M | 0.03% | +225,923+364.9% | Added |
| Front Street Capital Management, Inc. | 286,994 | $7.90M | 1.12% | −2,778−1.0% | Reduced |
| Goldman Sachs Group Inc | 285,377 | $7.86M | 0.00% | −222,508−43.8% | Reduced |
| Van Berkom & Associates Inc. | 269,136 | $7.42M | 0.21% | −858−0.3% | Reduced |
| Montrusco Bolton Investments Inc. | 254,681 | $7.02M | 0.09% | −29,100−10.3% | Reduced |
| Charles Schwab Investment Management Inc | 236,332 | $6.52M | 0.00% | +5,826+2.5% | Added |
| UBS Group AG | 228,774 | $6.30M | 0.00% | −2,821−1.2% | Reduced |
| Dixon Mitchell Investment Counsel Inc. | 211,025 | $5.82M | 0.19% | −7,500−3.4% | Reduced |
| Louisbourg Investments Inc. | 207,130 | $5.71M | 1.14% | −8,165−3.8% | Reduced |
| Granite Investment Partners, LLC | 203,876 | $5.61M | 0.33% | −1,971−1.0% | Reduced |
| Scotia Capital Inc. | 195,019 | $5.35M | 0.02% | −13,999−6.7% | Reduced |
| First Trust Advisors LP | 184,128 | $5.07M | 0.00% | +35,416+23.8% | Added |
| Colony Group, LLC | 181,975 | $5.01M | 0.01% | −130.0% | Reduced |
| Polar Asset Management Partners Inc. | 180,000 | $4.96M | 0.10% | +180,000 | New |
| Swiss National Bank | 164,400 | $4.54M | 0.00% | +4,300+2.7% | Added |
| Royce & Associates LP | 164,500 | $4.53M | 0.05% | +30,000+22.3% | Added |
| Delaney Capital Management Ltd. | 153,037 | $4.22M | 0.70% | +153,037 | New |
| Citadel Advisors LLC | 148,840 | $4.10M | 0.00% | +79,020+113.2% | Added |
| CIBC Asset Management Inc | 131,500 | $3.62M | 0.01% | −3,354−2.5% | Reduced |
| Federation des caisses Desjardins du Quebec | 116,404 | $3.20M | 0.01% | −78,830−40.4% | Reduced |
| Dimensional Fund Advisors LP | 110,342 | $3.04M | 0.00% | +21,119+23.7% | Added |
| D. E. Shaw & Co., Inc. | 108,100 | $2.98M | 0.00% | −109,800−50.4% | Reduced |
| SEI Investments Co | 98,742 | $2.72M | 0.00% | +98,742 | New |
| Toronto Dominion Bank | 81,910 | $2.26M | 0.00% | +3,955+5.1% | Added |
| Canoe Financial LP | 80,600 | $2.22M | 0.03% | +1,723+2.2% | Added |
| Manufacturers Life Insurance Company, The | 76,426 | $2.11M | 0.00% | −340.0% | Reduced |
| Millennium Management LLC | 75,879 | $2.09M | 0.00% | +32,058+73.2% | Added |
| AYAL Capital Advisors Ltd | 72,200 | $1.99M | 1.09% | +72,200 | New |
| Fiera Capital Corp | 71,007 | $1.96M | 0.01% | −22,152−23.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 64,639 | $1.78M | 0.00% | −26,972−29.4% | Reduced |
| Nuveen, LLC | 62,584 | $1.73M | 0.00% | 00.0% | Unchanged |
| Caldwell Investment Management Ltd. | 60,800 | $1.69M | 1.04% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 59,255 | $1.67M | 0.00% | +9,023+18.0% | Added |
| Lazard Asset Management LLC | 58,426 | $1.61M | 0.00% | +58,426 | New |
| FIL Ltd | 53,569 | $1.47M | 0.00% | +53,569 | New |
| Aviso Financial Inc. | 51,725 | $1.42M | 0.05% | −518−1.0% | Reduced |
| Guardian Capital LP | 47,063 | $1.30M | 0.04% | +47,063 | New |
| British Columbia Investment Management Corp | 43,753 | $1.21M | 0.01% | −4,053−8.5% | Reduced |
| Bank of Nova Scotia Trust Co | 30,514 | $840.4K | 0.07% | +5,439+21.7% | Added |
| Main Management ETF Advisors, LLC | 29,754 | $819.0K | 0.03% | +304+1.0% | Added |
| SIG North Trading, ULC | 29,342 | $808.1K | 0.14% | +29,342 | New |
| Purpose Unlimited Inc. | 28,802 | $793.4K | 0.04% | +28,802 | New |
| Public Employees Retirement System of Ohio | 27,215 | $750.7K | 0.00% | +100.0% | Added |
| Franklin Resources Inc | 25,386 | $699.3K | 0.00% | +9,556+60.4% | Added |
| Citigroup Inc | 25,149 | $693.7K | 0.00% | +8,707+53.0% | Added |
| Candelo Capital Management LP | 24,700 | $680.2K | 0.62% | +24,700 | New |
| Jane Street Group, LLC | 22,063 | $607.9K | 0.00% | +22,063 | New |
| Morgan Stanley | 21,491 | $591.9K | 0.00% | −48,148−69.1% | Reduced |
| Standard Life Aberdeen plc | 20,007 | $551.0K | 0.00% | +1,412+7.6% | Added |
| PenderFund Capital Management Ltd. | 20,000 | $550.9K | 0.09% | 00.0% | Unchanged |
| Numerai GP LLC | 16,305 | $449.0K | 0.05% | +16,305 | New |
| Pictet Asset Management Holding SA | 16,006 | $441.5K | 0.00% | +468+3.0% | Added |
| Van Eck Associates Corp | 13,571 | $374.0K | 0.00% | +7,559+125.7% | Added |
| Stifel Financial Corp | 12,593 | $346.8K | 0.00% | +467+3.9% | Added |
| Third View Private Wealth, LLC | 12,264 | $337.8K | 0.05% | +12,264 | New |
| Mariner, LLC | 12,167 | $335.1K | 0.00% | +3,143+34.8% | Added |
| TRUE Private Wealth Advisors | 12,080 | $332.7K | 0.03% | 00.0% | Unchanged |
| Savant Capital, LLC | 11,372 | $313.2K | 0.00% | +11,372 | New |
| SkyView Investment Advisors, LLC | 10,966 | $302.0K | 0.04% | +10,966 | New |
| XTX Topco Ltd | 10,640 | $293.0K | 0.01% | −2,981−21.9% | Reduced |
| Northwest & Ethical Investments L.P. | 10,553 | $290.7K | 0.01% | +1,940+22.5% | Added |
| Deutsche Bank AG | 10,261 | $282.6K | 0.00% | −627−5.8% | Reduced |
| Investment Management Corp of Ontario | 10,116 | $278.6K | 0.00% | +10,116 | New |
| Rockefeller Capital Management L.P. | 9,790 | $270.0K | 0.00% | −18,941−65.9% | Reduced |
| Verition Fund Management LLC | 9,192 | $253.1K | 0.00% | +9,192 | New |
| Alliancebernstein L.P. | 8,960 | $246.8K | 0.00% | −860−8.8% | Reduced |
| Campbell & CO Investment Adviser LLC | 8,805 | $242.5K | 0.01% | +8,805 | New |