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ATS · ATS Corp /ATS

Track ATS — free Ask ALVIS about ATS
$26.50 -0.47 (-1.74%) At close · Jul 29
Market Cap
$2.62B
Shares
97.01M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 130
Total Value: $2,396,880,475
Total Shares: 84,953,987
Showing 1–100 of 132 holdings by value · page 1 of 2

Institutional Ownership Trend

15 quarters

Superinvestors Holding ATS

All superinvestors →
Prem Watsa $70,116,480 Joel Greenblatt $216,322

Holder Concentration

Across 130 13F filers
Top Holder
19.3%
Jun 2023 → Mar 2026 · range 17.3% – 24.0%
of institutional value
Top 5
49.1%
Jun 2023 → Mar 2026 · range 42.8% – 50.8%
of institutional value
Top 10
63.8%
Jun 2023 → Mar 2026 · range 59.5% – 66.3%
of institutional value
HHI
693
Jun 2023 → Mar 2026 · range 582 – 825
Broadly held
Showing 100 of 132
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Small MASON CAPITAL MANAGEMENT LLC $462,597,594 19.30% 16,404,170
Mega ROYAL BANK OF CANADA Bank $218,883,829 9.13% 7,761,838
Large EdgePoint Investment Group Inc. $202,140,758 8.43% 7,168,112
Large Beutel, Goodman & Co Ltd. $153,823,921 6.42% 5,454,749
Mid TURTLE CREEK ASSET MANAGEMENT INC. $138,086,065 5.76% 4,896,669
Mega BANK OF MONTREAL /CAN/ Bank $87,853,150 3.67% 3,115,360
Mid FAIRFAX FINANCIAL HOLDINGS LTD/ CAN $70,116,480 2.93% 2,486,400
Mega VANGUARD CAPITAL MANAGEMENT LLC $66,741,786 2.78% 2,366,730
Mega JANUS HENDERSON GROUP PLC $64,781,434 2.70% 2,297,214
Mega FMR LLC $64,224,710 2.68% 2,277,472
Large Connor, Clark & Lunn Investment Management Ltd. $63,866,147 2.66% 2,264,757
Mid Vinva Investment Management Ltd $58,908,305 2.46% 2,088,947
Small ACK Asset Management LLC $52,062,727 2.17% 1,846,196
Mega FIL Ltd $50,144,703 2.09% 1,778,181
Large TD Waterhouse Canada Inc. $48,456,396 2.02% 1,683,683
Mid Hill City Capital, LP $46,525,967 1.94% 1,649,857
Mega TD Asset Management Inc $40,113,343 1.67% 1,422,459
Mid Scheer, Rowlett & Associates Investment Management Ltd. $33,330,623 1.39% 1,181,937
Mid Marathon Asset Management Ltd $30,848,290 1.29% 1,093,911
Mega Clearbridge Investments, LLC $30,774,406 1.28% 1,091,291
Mega BANK OF AMERICA CORP /DE/ Bank $26,673,673 1.11% 945,875
Mid Alberta Investment Management Corp $26,513,386 1.11% 940,191
Large VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. $24,350,305 1.02% 863,486
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $21,384,426 0.89% 758,313
Mega VANGUARD FIDUCIARY TRUST CO Bank $20,531,235 0.86% 728,058
Large NATIONAL BANK OF CANADA /FI/ Bank $18,281,551 0.76% 648,282
Mega PRINCIPAL FINANCIAL GROUP INC $17,507,688 0.73% 620,840
Large MACKENZIE FINANCIAL CORP $17,385,412 0.73% 616,504
Mega Legal & General Group Plc $17,249,629 0.72% 611,689
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $15,057,587 0.63% 533,957
Large 1832 Asset Management L.P. $11,327,827 0.47% 401,696
Large Public Sector Pension Investment Board Pension $10,062,803 0.42% 356,837
Large CIBC WORLD MARKET INC. $9,774,289 0.41% 346,606
Mega Invesco Ltd. $9,677,562 0.40% 343,176
Small Front Street Capital Management, Inc. $7,362,681 0.31% 261,088
Mega Vanguard Global Advisers, LLC $7,303,743 0.30% 258,998
Mid Van Berkom & Associates Inc. $7,257,552 0.30% 257,360
Mega FRANKLIN RESOURCES INC $6,978,568 0.29% 247,467
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $6,730,042 0.28% 238,654
Mega UBS Group AG $6,419,109 0.27% 227,628
Mid Waratah Capital Advisors Ltd. $6,316,320 0.26% 223,983
Mid Dixon Mitchell Investment Counsel Inc. $5,950,905 0.25% 211,025
Large SCOTIA CAPITAL INC. $5,429,346 0.23% 192,530
Large Focus Partners Wealth $5,131,695 0.21% 181,975
Mid ROYCE & ASSOCIATES LP $5,061,900 0.21% 179,500
Mid ArrowMark Colorado Holdings LLC $4,906,800 0.20% 174,000
Mid Granite Investment Partners, LLC $4,879,474 0.20% 173,031
Large SEI INVESTMENTS CO $4,732,524 0.20% 167,820
Mega Swiss National Bank Bank $4,636,080 0.19% 164,400
Mega FIRST TRUST ADVISORS LP $4,354,164 0.18% 154,403
Small Candelo Capital Management LP $4,277,601 0.18% 151,688
Large CIBC Asset Management Inc $3,784,045 0.16% 134,186
Mega DIMENSIONAL FUND ADVISORS LP $3,453,258 0.14% 122,456
Small LOUISBOURG INVESTMENTS INC. $3,197,573 0.13% 111,104
Large Federation des caisses Desjardins du Quebec $3,187,925 0.13% 113,047
Mid HARBOR CAPITAL ADVISORS, INC. $2,909,337 0.12% 103,168
Mid MONTRUSCO BOLTON INVESTMENTS INC. $2,850,831 0.12% 99,056
Mega MORGAN STANLEY $2,830,994 0.12% 100,390
Large TORONTO DOMINION BANK Bank $2,627,534 0.11% 93,175
Mid Canoe Financial LP $2,389,430 0.10% 83,024
Mega JANE STREET GROUP, LLC $2,330,476 0.10% 82,641
Mega CITADEL ADVISORS LLC $2,290,939 0.10% 81,239
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $2,090,466 0.09% 74,130
Large BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp $1,985,900 0.08% 70,422
Large LAZARD ASSET MANAGEMENT LLC $1,971,518 0.08% 69,912
Mega GEODE CAPITAL MANAGEMENT, LLC $1,940,103 0.08% 68,798
Mega VANGUARD ASSET MANAGEMENT, Ltd $1,884,606 0.08% 66,830
Mega Nuveen, LLC $1,764,868 0.07% 62,584
Small Caldwell Investment Management Ltd. $1,714,560 0.07% 60,800
Mega GOLDMAN SACHS GROUP INC $1,473,478 0.06% 52,251
Small PCJ Investment Counsel Ltd. $1,410,000 0.06% 50,000
Mid GUARDIAN CAPITAL LP $1,324,131 0.06% 46,955
Mid Aviso Financial Inc. $1,290,432 0.05% 45,760
Mid INTACT INVESTMENT MANAGEMENT INC. $1,165,273 0.05% 40,489
Mid BANK OF NOVA SCOTIA TRUST CO Bank $968,161 0.04% 34,332
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $886,890 0.04% 31,450
Mega D. E. Shaw & Co., Inc. $851,640 0.04% 30,200
Mid Purpose Unlimited Inc. $805,589 0.03% 28,567
Small Numerai GP LLC $776,571 0.03% 27,538
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $770,847 0.03% 27,335
Mega CITIGROUP INC $756,211 0.03% 26,816
Mid SIG North Trading, ULC $740,955 0.03% 26,275
Large Aberdeen Group plc $739,883 0.03% 26,237
Mega VAN ECK ASSOCIATES CORP $684,442 0.03% 24,271
Large ExodusPoint Capital Management, LP $621,810 0.03% 22,050
Mid SIG North Trading, ULC $611,940 0.03% 21,700
Mid SIG North Trading, ULC $611,940 0.03% 21,700
Small PenderFund Capital Management Ltd. $564,000 0.02% 20,000
Large Vanguard Investments Australia, Ltd. $544,683 0.02% 19,315
Large Pictet Asset Management Holding SA $463,128 0.02% 16,423
Large Mariner, LLC $457,883 0.02% 16,237
Large Balyasny Asset Management L.P. $398,296 0.02% 14,124
Mid Engineers Gate Manager LP $368,066 0.02% 13,052
Mid Savant Capital, LLC $356,927 0.01% 12,657
Small TRUE Private Wealth Advisors $347,662 0.01% 12,080
Large STIFEL FINANCIAL CORP $335,326 0.01% 11,891
Mid Investment Management Corp of Ontario $330,391 0.01% 11,716
Mid Northwest & Ethical Investments L.P. $309,720 0.01% 10,983
Small SkyView Investment Advisors, LLC $309,241 0.01% 10,966
Mega DEUTSCHE BANK AG\ Bank $303,205 0.01% 10,752
Key facts CIK 1394832 CUSIP 00217Y104 13F (30d) 11 filings 11 filers Visit website Investor relations

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