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, Q1 2026
Institutional positions in ATS Corp as of Mar 31, 2026. 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
- 131
- +11 vs. Q4 2025
- Shares held
- 85.1M
- +6.39M (+8.1%) vs. Q4 2025
- Total value
- $2.39B
- +$214.3M (+9.8%) vs. Q4 2025
- New holders
- 24
- 45 more added
- Sold out
- 13
- 40 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding ATS Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| 1832 Asset Management L.P. | 401,696 | $11.3M | 0.01% | −416,863−50.9% | Reduced |
| Legal & General Group Plc | 611,689 | $17.2M | 0.00% | +69,666+12.9% | Added |
| Mackenzie Financial Corp | 616,504 | $17.4M | 0.02% | −142,476−18.8% | Reduced |
| Principal Financial Group Inc | 620,840 | $17.4M | 0.01% | −257,400−29.3% | Reduced |
| National Bank of Canada | 648,282 | $18.1M | 0.02% | +229,950+55.0% | Added |
| Vanguard Fiduciary Trust Co | 728,058 | $20.5M | 0.01% | +728,058 | New |
| Massachusetts Financial Services Co | 533,957 | $20.9M | 0.01% | −24,718−4.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 758,313 | $21.3M | 0.03% | −383,522−33.6% | Reduced |
| Alberta Investment Management Corp | 940,191 | $26.5M | 0.16% | −400,074−29.9% | Reduced |
| Bank of America Corp | 945,875 | $26.7M | 0.00% | −154,506−14.0% | Reduced |
| Marathon Asset Mgmt Ltd | 1,093,911 | $30.7M | 1.18% | −3,800−0.3% | Reduced |
| Clearbridge Investments, LLC | 1,091,291 | $30.8M | 0.03% | −20,194−1.8% | Reduced |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1,181,937 | $33.3M | 2.40% | −44,513−3.6% | Reduced |
| Kempen Capital Management N.V. | 863,486 | $33.9M | 0.30% | +48,455+5.9% | Added |
| Vinva Investment Management Ltd | 2,088,947 | $36.5M | 0.46% | +2,088,947 | New |
| TD Asset Management Inc | 1,422,459 | $40.0M | 0.03% | +229,251+19.2% | Added |
| Hill City Capital, LP | 1,649,857 | $46.5M | 1.66% | 00.0% | Unchanged |
| TD Waterhouse Canada Inc. | 1,634,449 | $46.9M | 0.14% | +668,100+69.1% | Added |
| FIL Ltd | 1,778,181 | $50.1M | 0.04% | +1,724,612+3,219.4% | Added |
| ACK Asset Management LLC | 1,846,196 | $52.1M | 6.50% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 2,264,757 | $63.8M | 0.15% | −220,881−8.9% | Reduced |
| FMR LLC | 2,277,472 | $64.2M | 0.00% | +159,706+7.5% | Added |
| Janus Henderson Group PLC | 2,297,214 | $64.5M | 0.03% | +1,435,375+166.5% | Added |
| Vanguard Capital Management LLC | 2,366,730 | $66.7M | 0.00% | +2,366,730 | New |
| Fairfax Financial Holdings LtdSuperinvestorFairfax Financial | 2,486,400 | $69.4M | 3.57% | 00.0% | Unchanged |
| Bank of Montreal | 3,115,360 | $87.8M | 0.04% | +92,667+3.1% | Added |
| Turtle Creek Asset Management Inc. | 4,896,669 | $138.1M | 5.17% | −745,383−13.2% | Reduced |
| Beutel, Goodman & Co Ltd. | 5,454,749 | $153.3M | 1.04% | −382,389−6.6% | Reduced |
| EdgePoint Investment Group Inc. | 7,168,112 | $202.1M | 1.62% | +279,327+4.1% | Added |
| Royal Bank of Canada | 7,761,838 | $218.9M | 0.04% | +117,291+1.5% | Added |
| Mason Capital Management LLC | 16,404,170 | $462.6M | 75.48% | +840,602+5.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −753,492−100.0% | Sold out |
| Agf Management Ltd | 0 | $0 | 0.00% | −400,140−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −180,000−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −75,879−100.0% | Sold out |
| AYAL Capital Advisors Ltd | 0 | $0 | 0.00% | −72,200−100.0% | Sold out |
| Fiera Capital Corp | 0 | $0 | 0.00% | −71,007−100.0% | Sold out |
| Main Management ETF Advisors, LLC | 0 | $0 | 0.00% | −29,754−100.0% | Sold out |
| Third View Private Wealth, LLC | 0 | $0 | 0.00% | −12,264−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −10,640−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −9,790−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −9,192−100.0% | Sold out |
| Envestnet Asset Management Inc | 0 | $0 | 0.00% | −7,634−100.0% | Sold out |
| Banque Cantonale Vaudoise | 0 | $0 | 0.00% | −261−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |