13F

Stock

Ats Corporation

Ticker not mapped · held by 121 managers

Reported value

$2.12B

Holders

121

+3 new · −0 exited

Holders’ est. mark

$6.04M

Price effect on 6 books still in the name

Largest holder

$428.6M

MASON CAPITAL MANAGEMENT LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
MASON CAPITAL MANAGEMENT LLC15.6M$428.6M—Held
ROYAL BANK OF CANADA7.64M$210.5M—Held
EdgePoint Investment Group Inc.6.89M$189.8M—Held
TURTLE CREEK ASSET MANAGEMENT INC.5.64M$155.4M—Held
Vanguard3.4M$93.6M—Held
BANK OF MONTREAL /CAN/3.02M$83.3M—Held
Connor, Clark & Lunn Investment Management Ltd.2.49M$68.5M—Held
FAIRFAX FINANCIAL HOLDINGS LTD/ CAN2.49M$68.3M—Held
Fidelity2.12M$58.3M—Held
ACK Asset Management LLC1.85M$50.8M—Held
Hill City Capital, LP1.65M$45.4M—Held
Alberta Investment Management Corp1.34M$36.9M$1.84MAdded$1.84M
Invesco Ltd.1.27M$35M—Held
Scheer, Rowlett & Associates Investment Management Ltd.1.23M$33.8M—Held
TD Asset Management Inc1.19M$32.9M—Held
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.1.14M$31.5M—Held
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.815K$30.8M—Held
Clearbridge Investments, LLC1.11M$30.6M—Held
BANK OF AMERICA CORP /DE/1.1M$30.3M$1.47MCut−$2.49M
Marathon Asset Management Ltd1.1M$30.3M—Held
NORGES BANK1.08M$29.7M$2.69MAdded$4.11M
TD Waterhouse Canada Inc.966.3K$26.5M—Held
PRINCIPAL FINANCIAL GROUP INC878.2K$24.2M—Held
JANUS HENDERSON GROUP PLC861.8K$23.8M—Held
1832 Asset Management L.P.818.6K$22.5M—Held
MACKENZIE FINANCIAL CORP759K$21.1M—Held
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND753.5K$20.8M—Held
MASSACHUSETTS FINANCIAL SERVICES CO /MA/558.7K$15.4M—Held
Legal & General Group Plc542K$14.9M—Held
NATIONAL BANK OF CANADA /FI/418.3K$11.5M—Held
AGF MANAGEMENT LTD400.1K$11M—Held
CIBC WORLD MARKET INC.354.1K$9.75M—Held
PUBLIC SECTOR PENSION INVESTMENT BOARD287.8K$7.93M—Held
GOLDMAN SACHS GROUP INC285.4K$7.86M—Held
MONTRUSCO BOLTON INVESTMENTS INC.254.7K$7.02M—Held
CHARLES SCHWAB INVESTMENT MANAGEMENT INC236.3K$6.52M—Held
UBS Group AG228.8K$6.3M—Held
Dixon Mitchell Investment Counsel Inc.211K$5.82M—Held
LOUISBOURG INVESTMENTS INC.207.1K$5.71M—Held
Granite Investment Partners, LLC203.9K$5.61M—Held
SCOTIA CAPITAL INC.195K$5.35M—Held
FIRST TRUST ADVISORS LP184.1K$5.07M—Held
Focus Partners Wealth182K$5.01M—Held
Polar Asset Management Partners Inc.180K$4.96M—New
Swiss National Bank164.4K$4.54M—Held
ROYCE & ASSOCIATES LP164.5K$4.53M—Held
Citadel148.8K$4.1M—Held
CIBC Asset Management Inc131.5K$3.62M—Held
Federation des caisses Desjardins du Quebec116.4K$3.2M—Held
DIMENSIONAL FUND ADVISORS LP110.3K$3.04M—Held
D. E. Shaw & Co., Inc.108.1K$2.98M—Held
SEI INVESTMENTS CO98.7K$2.72M—Held
TORONTO DOMINION BANK81.9K$2.26M—Held
Canoe Financial LP80.6K$2.22M—Held
MANUFACTURERS LIFE INSURANCE COMPANY, THE76.4K$2.11M—Held
MILLENNIUM MANAGEMENT LLC75.9K$2.09M—Held
AYAL Capital Advisors Ltd72.2K$1.99M—Held
Fiera Capital Corp71K$1.96M—Held
Zurcher Kantonalbank (Zurich Cantonalbank)64.6K$1.78M—Held
Nuveen, LLC62.6K$1.73M—Held
Caldwell Investment Management Ltd.60.8K$1.69M—Held
GEODE CAPITAL MANAGEMENT, LLC59.3K$1.67M—Held
LAZARD ASSET MANAGEMENT LLC58.4K$1.61M—Held
FIL Ltd53.6K$1.47M—Held
Aviso Financial Inc.51.7K$1.42M—Held
GUARDIAN CAPITAL LP47.1K$1.3M—Held
BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp43.8K$1.21M—Held
BANK OF NOVA SCOTIA TRUST CO30.5K$840.4K—Held
SIG North Trading, ULC29.3K$808.1K—Held
Purpose Unlimited Inc.28.8K$793.4K—Held
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO27.2K$750.7K—Held
FRANKLIN RESOURCES INC25.4K$699.3K—Held
CITIGROUP INC25.1K$693.7K—Held
Candelo Capital Management LP24.7K$680.2K—Held
JANE STREET GROUP, LLC22.1K$607.9K—Held
MORGAN STANLEY21.5K$591.9K$28.8KCut−$1.23M
Aberdeen Group plc20K$551K—Held
PenderFund Capital Management Ltd.20K$550.9K—Held
Numerai GP LLC16.3K$449K—Held
Pictet Asset Management Holding SA16K$441.5K—Held
STIFEL FINANCIAL CORP12.6K$346.8K—Held
Third View Private Wealth, LLC12.3K$337.8K—Held
Mariner, LLC12.2K$335.1K—Held
TRUE Private Wealth Advisors12.1K$332.7K—Held
Savant Capital, LLC11.4K$313.2K—New
XTX Topco Ltd10.6K$293K—Held
Northwest & Ethical Investments L.P.10.6K$290.7K—Held
DEUTSCHE BANK AG\10.3K$282.6K—Held
Investment Management Corp of Ontario10.1K$278.6K—Held
Rockefeller Capital Management L.P.9.79K$270K—Held
Verition Fund Management LLC9.19K$253.1K—Held
ALLIANCEBERNSTEIN L.P.8.96K$246.8K—Held
Campbell & CO Investment Adviser LLC8.8K$242.5K—Held
Russell Investments Group, Ltd.8.53K$235.3K—Held
ENVESTNET ASSET MANAGEMENT INC7.63K$210.4K—Held
Beutel, Goodman & Co Ltd.5.84M$161K—Held
BARCLAYS PLC5.26K$145K$6.04KAdded$26.9K
Smartleaf Asset Management LLC1.05K$29.2K—Held
Blue Trust, Inc.733$20.2K—Held
WELLS FARGO & COMPANY/MN711$19.6K—Held
Hillsdale Investment Management Inc.600$16.6K—Held
JPMORGAN CHASE & CO553$15.2K—Held
Front Street Capital Management, Inc.287K$7.9K—Held
Van Berkom & Associates Inc.269.1K$7.42K—Held
Farther Finance Advisors, LLC263$7.24K—Held
Banque Cantonale Vaudoise261$7K—Held
Bank of Jackson Hole Trust137$3.77K—Held
Pacer Advisors, Inc.137$3.77K—Held
Larson Financial Group LLC121$3.33K—Held
WealthCollab, LLC89$2.45K—Held
EverSource Wealth Advisors, LLC69$1.9K—Held
BlackRock, Inc.58$1.6K—Held
Root Financial Partners, LLC40$1.1K—Held
JONES FINANCIAL COMPANIES LLLP36$991—Held
OSAIC HOLDINGS, INC.30$826—Held
Main Management ETF Advisors, LLC29.8K$819—Held
Bell Investment Advisors, Inc20$551—Held
VAN ECK ASSOCIATES CORP13.6K$374—Held
SkyView Investment Advisors, LLC11K$302—New
Leonteq Securities AG4$151$5Added$5
HANTZ FINANCIAL SERVICES, INC.173$5—Held

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.