AtsATS
13F holders, Q2 2025 (June 30)131holders +9
21new positions
12sold out
3famous investors
$31.91avg. 13F price*
At the end of Q2 2025, 131 institutions reported holding Ats Corp. (ATS) in their 13F filings, up 9 from Q1 2025. 21 opened new positions and 12 sold out. The largest holders were Mason Capital Management LLC ($496.2M), Turtle Creek Asset Management Inc. ($242.0M) and Royal Bank of Canada ($225.5M). 3 famous investors held it, including Prem Watsa (4.2% of Fairfax Financial Holdings's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Ats Corp.
- CUSIP
- 00217Y104
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 21 | $77.1M |
| Exits | 12 | $34.8M |
All 13F filers, Q1 2025 → Q2 2025: 6,689,209 shares bought and 7,243,926 shares sold, net −554,717 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 131 holders
| Mason Capital Management LLC | 97.00% | No change | 15,563,568 | $496.2M |
| Turtle Creek Asset Management Inc. | 7.02% | Reduce -8.6% | 7,590,538 | $242.0M |
| Royal Bank of Canada | 0.04% | Add +9.2% | 7,074,621 | $225.5M |
| Beutel, Goodman & Co Ltd. | 1.24% | Reduce -3.1% | 6,834,488 | $217.5M |
| EdgePoint Investment Group Inc. | 1.56% | Add +28.2% | 6,434,005 | $205.3M |
| Vanguard Group Inc. | 0.00% | Add +1.6% | 3,272,101 | $104.4M |
| Fairfax Financial Holdings | 4.23% | No change | 2,486,400 | $79.1M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.27% | Add +19.9% | 2,369,028 | $75.6M |
| Clearbridge Investments, LLC | 0.05% | Add +15.3% | 1,847,036 | $58.9M |
| ACK Asset Management LLC | 7.73% | Reduce -8.3% | 1,846,196 | $58.9M |
| Burgundy Asset Management Ltd. | 0.56% | Add +2.5% | 1,812,147 | $57.7M |
| TD Waterhouse Canada Inc. | 0.33% | Reduce -13.2% | 1,452,320 | $46.4M |
| Mackenzie Financial Corp. | 0.06% | Add +17.5% | 1,410,833 | $45.0M |
| FMR LLC | 0.00% | Reduce -5.5% | 1,405,012 | $44.8M |
| TD Asset Management Inc | 0.03% | Add +10.6% | 1,278,879 | $40.7M |
| Marathon Asset Management Ltd | 1.26% | New | 1,234,961 | $39.3M |
| Hill City Capital, LP | 2.10% | Reduce -5.8% | 1,224,857 | $39.0M |
| Capital World Investors | 0.01% | No change | 1,196,000 | $38.1M |
| Invesco Ltd. | 0.01% | Reduce -15.3% | 1,188,227 | $37.9M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.07% | Add +0.1% | 1,112,974 | $35.4M |
| Bank of Montreal | 0.02% | Add +5.1% | 1,098,424 | $35.1M |
| Norges Bank | 0.00% | No change | 1,027,456 | $32.8M |
| Janus Henderson Group PLC | 0.01% | No change | 922,164 | $29.4M |
| Bank of America Corp. | 0.00% | Reduce -18.4% | 861,833 | $27.5M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.05% | Add +31.2% | 841,502 | $26.9M |
| 1832 Asset Management L.P. | 0.05% | Reduce -2.4% | 824,558 | $26.3M |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1.64% | Add +25.3% | 792,305 | $25.3M |
| Principal Financial Group Inc. | 0.01% | Add +12.4% | 783,440 | $24.9M |
| Alberta Investment Management Corp | 0.21% | Reduce -20.6% | 767,600 | $24.5M |
| Massachusetts Financial Services Co. | 0.01% | Add +23.0% | 631,114 | $20.1M |
| Moore Capital Management, LP | 0.42% | Reduce -15.4% | 611,120 | $19.5M |
| Goldman Sachs Group Inc. | 0.00% | Add +28.2% | 556,575 | $17.7M |
| Agf Management Ltd. | 0.07% | Reduce -9.6% | 489,956 | $15.6M |
| Galibier Capital Management Ltd. | 4.65% | Reduce -39.7% | 486,375 | $15.5M |
| National Bank of Canada | 0.02% | Add +4.0% | 439,018 | $14.0M |
| Legal & General Group Plc | 0.00% | Reduce -4.9% | 438,440 | $14.0M |
| Dixon Mitchell Investment Counsel Inc. | 0.50% | Add +12.9% | 402,125 | $12.8M |
| Foresight Group Ltd Liability Partnership | 1.72% | Reduce -1.2% | 381,812 | $12.2M |
| JARISLOWSKY, FRASER Ltd | 0.07% | Add +175.8% | 379,208 | $12.1M |
| Cibc World Market Inc. | 0.03% | Add +6.8% | 369,726 | $11.8M |
| Montrusco Bolton Investments Inc. | 0.11% | New | 318,781 | $10.1M |
| Van Lanschot Kempen Investment Management N.V. | 0.09% | New | 225,582 | $9.8M |
| Front Street Capital Management, Inc. | 1.80% | Add +1.7% | 293,985 | $9.4M |
| Picton Mahoney Asset Management | 0.13% | New | 279,805 | $8.9M |
| Van Berkom & Associates Inc. | 0.26% | Add +16.2% | 269,260 | $8.6M |
| Federation des caisses Desjardins du Quebec | 0.04% | Reduce -44.8% | 266,968 | $8.5M |
| UBS Group AG | 0.00% | Reduce -23.6% | 257,218 | $8.2M |
| Scotia Capital Inc. | 0.03% | Add +3.8% | 203,774 | $6.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.2% | 200,237 | $6.4M |
| Swiss National Bank | 0.00% | Reduce -1.4% | 160,100 | $5.1M |
| Granite Investment Partners, LLC | 0.24% | Reduce -2.9% | 153,040 | $4.9M |
| Fiera Capital Corp | 0.01% | Reduce -81.7% | 132,369 | $4.2M |
| Morgan Stanley | 0.00% | Reduce -56.6% | 130,873 | $4.2M |
| Royce & Associates LP | 0.04% | Add +4.2% | 125,500 | $4.0M |
| Lombard Odier Asset Management (Europe) Ltd | 0.34% | Add +6.8% | 122,148 | $3.9M |
| First Trust Advisors LP | 0.00% | Add +2.9% | 120,088 | $3.8M |
| Waratah Capital Advisors Ltd. | 0.26% | Add +10.6% | 118,480 | $3.8M |
| Louisbourg Investments Inc. | 0.76% | New | 101,522 | $3.2M |
| Natixis Advisors, LLC | 0.01% | Add +14.8% | 98,912 | $3.2M |
| Canoe Financial LP | 0.04% | Reduce -86.8% | 81,114 | $2.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -1.1% | 80,962 | $2.6M |
| CIBC Asset Management Inc | 0.01% | Reduce -22.9% | 79,703 | $2.5M |
| Dimensional Fund Advisors LP | 0.00% | Add +76.9% | 77,062 | $2.5M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -48.7% | 63,161 | $2.0M |
| Nuveen, LLC | 0.00% | Reduce -5.3% | 62,584 | $2.0M |
| Caldwell Investment Management Ltd. | 1.68% | No change | 60,800 | $1.9M |
| D. E. Shaw & Co. | 0.00% | Add +89.5% | 58,572 | $1.9M |
| Aviso Financial Inc. | 0.07% | Add +0.9% | 50,653 | $1.6M |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp | 0.01% | Add +7.8% | 50,516 | $1.6M |
| Geode Capital Management, LLC | 0.00% | Add +6.0% | 45,855 | $1.5M |
| Toronto Dominion Bank | 0.00% | Reduce -28.6% | 43,240 | $1.4M |
| Lombard Odier Asset Management (Switzerland) SA | 0.06% | New | 39,572 | $1.3M |
| FIL Ltd | 0.00% | Reduce -95.7% | 35,436 | $1.1M |
| Jane Street Group, LLC | 0.00% | Reduce -23.4% | 32,225 | $1.0M |
| Ewing Morris & Co. Investment Partners Ltd. | 0.45% | Add +11.7% | 31,600 | $1.0M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -62.8% | 29,859 | $950K |
| Northwest & Ethical Investments L.P. | 0.02% | Add +254.5% | 29,543 | $941K |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -93.6% | 28,880 | $920K |
| Trexquant Investment LP | 0.01% | New | 28,803 | $918K |
| Susquehanna International Group, LLP | 0.00% | New | 28,082 | $895K |
| Amundi | 0.00% | Reduce -11.0% | 27,180 | $888K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +17.9% | 27,279 | $868K |
| Public Employees Retirement System of Ohio | 0.00% | Reduce -8.8% | 27,152 | $864K |
| Citadel Advisors | 0.00% | New | 26,092 | $832K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -82.0% | 22,790 | $726K |
| Bank of Nova Scotia Trust Co. | 0.07% | Add +23.1% | 21,802 | $695K |
| Barclays PLC | 0.00% | Reduce -0.8% | 21,628 | $690K |
| Onex Canada Asset Management Inc. | 0.07% | Reduce -56.0% | 19,053 | $608K |
| Franklin Resources Inc. | 0.00% | Add +7.3% | 17,106 | $546K |
| Aberdeen Group plc | 0.00% | Add +21.5% | 16,205 | $517K |
| Mariner, LLC | 0.00% | Reduce -10.1% | 15,640 | $499K |
| Alliancebernstein L.P. | 0.00% | No change | 14,000 | $446K |
| Pictet Asset Management Holding SA | 0.00% | Reduce -1.6% | 13,873 | $442K |
| Citigroup Inc. | 0.00% | Add +49.1% | 12,610 | $401K |
| TRUE Private Wealth Advisors | 0.04% | No change | 12,080 | $385K |
| Nebula Research & Development LLC | 0.03% | Reduce -23.3% | 11,283 | $360K |
| XTX Topco Ltd | 0.01% | New | 10,941 | $349K |
| Bank of New York Mellon Corp | 0.00% | Reduce -4.2% | 10,774 | $343K |
| Deutsche Bank AG | 0.00% | Add +30.8% | 9,965 | $318K |
| Stifel Financial Corp. | 0.00% | New | 9,371 | $299K |
| Cidel Asset Management Inc. | 0.02% | Add +11.9% | 9,270 | $295K |
| Engineers Gate Manager LP | 0.00% | Reduce -14.1% | 8,990 | $287K |
| Dynamic Technology Lab Private Ltd | 0.04% | New | 8,810 | $281K |
| Tower Research Capital LLC (TRC) | 0.01% | Reduce -30.7% | 8,812 | $281K |
| Hantz Financial Services, Inc. | 0.00% | Reduce -6.0% | 8,292 | $264K |
| SkyView Investment Advisors, LLC | 0.03% | New | 7,449 | $237K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | New | 7,316 | $233K |
| Neuberger Berman Group LLC | 0.00% | New | 6,885 | $219K |
| Boothbay Fund Management, LLC | 0.01% | Reduce -94.6% | 6,674 | $213K |
| Cresset Asset Management, LLC | 0.00% | Reduce -48.1% | 6,466 | $206K |
| Van Eck Associates Corp. | 0.00% | Add +34.5% | 5,130 | $164K |
| Shell Asset Management Co. | 0.00% | No change | 4,331 | $138K |
| Simplex Trading, LLC | 0.00% | New | 3,630 | $115K |
| Steph & Co. | 0.02% | Reduce -62.4% | 2,000 | $64K |
| Raymond James Financial Inc. | 0.00% | New | 1,348 | $43K |
| Osaic Holdings, Inc. | 0.00% | Add +9.0% | 644 | $20K |
| Caitong International Asset Management Co., Ltd | 0.01% | Add +927.1% | 493 | $16K |
| JPMorgan Chase & Co. | 0.00% | Add +12.7% | 354 | $11K |
| Banque Cantonale Vaudoise | 0.00% | Reduce -47.9% | 360 | $11K |
| Washington Trust Advisors, Inc. | 0.00% | Add +313.9% | 178 | $6K |
| Allworth Financial LP | 0.00% | New | 120 | $4K |
| Pacer Advisors, Inc. | 0.00% | Add +106.7% | 93 | $3K |
| WealthCollab, LLC | 0.00% | New | 89 | $3K |
| Brooklyn Investment Group | 0.00% | New | 85 | $3K |
| Geneos Wealth Management Inc. | 0.00% | No change | 57 | $2K |
| Jones Financial Companies LLLP | 0.00% | Add +42.1% | 54 | $2K |
| Northwestern Mutual Wealth Management Co. | 0.00% | No change | 46 | $1K |
| US Bancorp \de | 0.00% | Reduce -94.1% | 38 | $1K |
| Bell Investment Advisors, Inc | 0.00% | New | 20 | $638 |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -20.0% | 20 | $638 |
| Leonteq Securities AG | 0.00% | No change | 4 | $175 |
"% of holder's portfolio" is ATS's weight in each manager's 13F, not the share of Ats Corp. the manager owns.