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 |
|---|---|---|---|---|---|
| Mason Capital Management LLC | 16,404,170 | $462.6M | 75.48% | +840,602+5.4% | Added |
| Royal Bank of Canada | 7,761,838 | $218.9M | 0.04% | +117,291+1.5% | Added |
| EdgePoint Investment Group Inc. | 7,168,112 | $202.1M | 1.62% | +279,327+4.1% | Added |
| Beutel, Goodman & Co Ltd. | 5,454,749 | $153.3M | 1.04% | −382,389−6.6% | Reduced |
| Turtle Creek Asset Management Inc. | 4,896,669 | $138.1M | 5.17% | −745,383−13.2% | Reduced |
| Bank of Montreal | 3,115,360 | $87.8M | 0.04% | +92,667+3.1% | Added |
| Fairfax Financial Holdings LtdSuperinvestorFairfax Financial | 2,486,400 | $69.4M | 3.57% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 2,366,730 | $66.7M | 0.00% | +2,366,730 | New |
| Janus Henderson Group PLC | 2,297,214 | $64.5M | 0.03% | +1,435,375+166.5% | Added |
| FMR LLC | 2,277,472 | $64.2M | 0.00% | +159,706+7.5% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 2,264,757 | $63.8M | 0.15% | −220,881−8.9% | Reduced |
| ACK Asset Management LLC | 1,846,196 | $52.1M | 6.50% | 00.0% | Unchanged |
| FIL Ltd | 1,778,181 | $50.1M | 0.04% | +1,724,612+3,219.4% | Added |
| TD Waterhouse Canada Inc. | 1,634,449 | $46.9M | 0.14% | +668,100+69.1% | Added |
| Hill City Capital, LP | 1,649,857 | $46.5M | 1.66% | 00.0% | Unchanged |
| TD Asset Management Inc | 1,422,459 | $40.0M | 0.03% | +229,251+19.2% | Added |
| Vinva Investment Management Ltd | 2,088,947 | $36.5M | 0.46% | +2,088,947 | New |
| Kempen Capital Management N.V. | 863,486 | $33.9M | 0.30% | +48,455+5.9% | Added |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1,181,937 | $33.3M | 2.40% | −44,513−3.6% | Reduced |
| Clearbridge Investments, LLC | 1,091,291 | $30.8M | 0.03% | −20,194−1.8% | Reduced |
| Marathon Asset Mgmt Ltd | 1,093,911 | $30.7M | 1.18% | −3,800−0.3% | Reduced |
| Bank of America Corp | 945,875 | $26.7M | 0.00% | −154,506−14.0% | Reduced |
| Alberta Investment Management Corp | 940,191 | $26.5M | 0.16% | −400,074−29.9% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 758,313 | $21.3M | 0.03% | −383,522−33.6% | Reduced |
| Massachusetts Financial Services Co | 533,957 | $20.9M | 0.01% | −24,718−4.4% | Reduced |
| Vanguard Fiduciary Trust Co | 728,058 | $20.5M | 0.01% | +728,058 | New |
| National Bank of Canada | 648,282 | $18.1M | 0.02% | +229,950+55.0% | Added |
| Principal Financial Group Inc | 620,840 | $17.4M | 0.01% | −257,400−29.3% | Reduced |
| Mackenzie Financial Corp | 616,504 | $17.4M | 0.02% | −142,476−18.8% | Reduced |
| Legal & General Group Plc | 611,689 | $17.2M | 0.00% | +69,666+12.9% | Added |
| 1832 Asset Management L.P. | 401,696 | $11.3M | 0.01% | −416,863−50.9% | Reduced |
| Public Sector Pension Investment Board | 356,837 | $10.1M | 0.03% | +69,008+24.0% | Added |
| CIBC World Markets Inc. | 346,606 | $9.77M | 0.02% | −7,463−2.1% | Reduced |
| Invesco Ltd. | 343,176 | $9.68M | 0.00% | −929,046−73.0% | Reduced |
| Front Street Capital Management, Inc. | 261,088 | $7.36M | 0.98% | −25,906−9.0% | Reduced |
| Vanguard Global Advisers, LLC | 258,998 | $7.30M | 0.00% | +258,998 | New |
| Van Berkom & Associates Inc. | 257,360 | $7.24M | 0.24% | −11,776−4.4% | Reduced |
| Franklin Resources Inc | 247,467 | $6.98M | 0.00% | +222,081+874.8% | Added |
| Charles Schwab Investment Management Inc | 238,654 | $6.71M | 0.00% | +2,322+1.0% | Added |
| UBS Group AG | 227,628 | $6.42M | 0.00% | −1,146−0.5% | Reduced |
| Waratah Capital Advisors Ltd. | 223,983 | $6.32M | 0.57% | +223,983 | New |
| Dixon Mitchell Investment Counsel Inc. | 211,025 | $5.93M | 0.21% | 00.0% | Unchanged |
| Scotia Capital Inc. | 192,530 | $5.38M | 0.02% | −2,489−1.3% | Reduced |
| Colony Group, LLC | 181,975 | $5.13M | 0.01% | 00.0% | Unchanged |
| Royce & Associates LP | 179,500 | $5.06M | 0.05% | +15,000+9.1% | Added |
| ArrowMark Colorado Holdings LLC | 174,000 | $4.91M | 0.13% | +174,000 | New |
| Granite Investment Partners, LLC | 173,031 | $4.88M | 0.30% | −30,845−15.1% | Reduced |
| Montrusco Bolton Investments Inc. | 170,956 | $4.80M | 0.07% | −83,725−32.9% | Reduced |
| SEI Investments Co | 167,820 | $4.73M | 0.00% | +69,078+70.0% | Added |
| Swiss National Bank | 164,400 | $4.63M | 0.00% | 00.0% | Unchanged |
| First Trust Advisors LP | 154,403 | $4.35M | 0.00% | −29,725−16.1% | Reduced |
| Delaney Capital Management Ltd. | 154,077 | $4.33M | 0.70% | +1,040+0.7% | Added |
| Candelo Capital Management LP | 151,688 | $4.27M | 4.30% | +126,988+514.1% | Added |
| CIBC Asset Management Inc | 134,186 | $3.77M | 0.01% | +2,686+2.0% | Added |
| Dimensional Fund Advisors LP | 122,456 | $3.45M | 0.00% | +12,114+11.0% | Added |
| Federation des caisses Desjardins du Quebec | 113,047 | $3.16M | 0.01% | −3,357−2.9% | Reduced |
| Harbor Capital Advisors, Inc. | 103,168 | $2.91M | 0.24% | +103,168 | New |
| Morgan Stanley | 100,390 | $2.83M | 0.00% | +78,899+367.1% | Added |
| Toronto Dominion Bank | 93,175 | $2.63M | 0.01% | +11,265+13.8% | Added |
| Canoe Financial LP | 87,430 | $2.46M | 0.03% | +6,830+8.5% | Added |
| Louisbourg Investments Inc. | 84,855 | $2.39M | 0.45% | −122,275−59.0% | Reduced |
| Jane Street Group, LLC | 82,641 | $2.33M | 0.00% | +60,578+274.6% | Added |
| Citadel Advisors LLC | 81,239 | $2.29M | 0.00% | −67,601−45.4% | Reduced |
| Manufacturers Life Insurance Company, The | 74,130 | $2.09M | 0.00% | −2,296−3.0% | Reduced |
| British Columbia Investment Management Corp | 70,422 | $1.99M | 0.01% | +26,669+61.0% | Added |
| Geode Capital Management, LLC | 68,798 | $1.97M | 0.00% | +9,543+16.1% | Added |
| Lazard Asset Management LLC | 69,912 | $1.97M | 0.00% | +11,486+19.7% | Added |
| Vanguard Asset Management, Ltd | 66,830 | $1.88M | 0.00% | +66,830 | New |
| Nuveen, LLC | 62,584 | $1.76M | 0.00% | 00.0% | Unchanged |
| Caldwell Investment Management Ltd. | 60,800 | $1.65M | 0.65% | 00.0% | Unchanged |
| Intact Investment Management Inc. | 53,389 | $1.50M | 0.04% | +53,389 | New |
| Goldman Sachs Group Inc | 52,251 | $1.47M | 0.00% | −233,126−81.7% | Reduced |
| PCJ Investment Counsel Ltd. | 50,000 | $1.41M | 0.40% | +50,000 | New |
| Guardian Capital LP | 46,955 | $1.32M | 0.03% | −108−0.2% | Reduced |
| Aviso Financial Inc. | 45,760 | $1.29M | 0.05% | −5,965−11.5% | Reduced |
| Bank of Nova Scotia Trust Co | 34,332 | $968.2K | 0.08% | +3,818+12.5% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 31,450 | $883.6K | 0.00% | −33,189−51.3% | Reduced |
| D. E. Shaw & Co., Inc. | 30,200 | $851.0K | 0.00% | −77,900−72.1% | Reduced |
| Purpose Unlimited Inc. | 28,567 | $805.2K | 0.03% | −235−0.8% | Reduced |
| Numerai GP LLC | 27,538 | $776.6K | 0.08% | +11,233+68.9% | Added |
| Public Employees Retirement System of Ohio | 27,335 | $767.8K | 0.00% | +120+0.4% | Added |
| Citigroup Inc | 26,816 | $753.4K | 0.00% | +1,667+6.6% | Added |
| SIG North Trading, ULC | 26,275 | $741.0K | 0.15% | −3,067−10.5% | Reduced |
| Standard Life Aberdeen plc | 26,237 | $739.9K | 0.00% | +6,230+31.1% | Added |
| Van Eck Associates Corp | 24,271 | $684.0K | 0.00% | +10,700+78.8% | Added |
| ExodusPoint Capital Management, LP | 22,050 | $621.8K | 0.01% | +22,050 | New |
| PenderFund Capital Management Ltd. | 20,000 | $563.7K | 0.09% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 19,315 | $544.4K | 0.00% | +19,315 | New |
| Pictet Asset Management Holding SA | 16,423 | $461.4K | 0.00% | +417+2.6% | Added |
| Mariner, LLC | 16,237 | $457.9K | 0.00% | +4,070+33.5% | Added |
| Balyasny Asset Management LLC | 14,124 | $398.3K | 0.00% | +14,124 | New |
| Engineers Gate Manager LP | 13,052 | $368.0K | 0.00% | +13,052 | New |
| Savant Capital, LLC | 12,657 | $356.9K | 0.00% | +1,285+11.3% | Added |
| TRUE Private Wealth Advisors | 12,080 | $340.7K | 0.03% | 00.0% | Unchanged |
| Stifel Financial Corp | 11,891 | $335.3K | 0.00% | −702−5.6% | Reduced |
| Investment Management Corp of Ontario | 11,716 | $330.4K | 0.00% | +1,600+15.8% | Added |
| Northwest & Ethical Investments L.P. | 10,983 | $309.4K | 0.01% | +430+4.1% | Added |
| SkyView Investment Advisors, LLC | 10,966 | $309.0K | 0.04% | 00.0% | Unchanged |
| Deutsche Bank AG | 10,752 | $303.2K | 0.00% | +491+4.8% | Added |
| Marshall Wace, LLP | 9,920 | $279.7K | 0.00% | +9,920 | New |