New Positions
22 managers initiated
Top five by reported value
ATS Corp TORONTO STOCK EXCHANGE:ATS
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
22 new42 added58 reduced18 exited
Total Institutional Holders
122
as of 2025-12-31
Top Holder
MASON CAPITAL MANAGEMENT LLC
$428.6M
Largest QoQ Increase
BANK OF MONTREAL /CAN/
+1,790,040 sh
Largest QoQ Decrease
Royal Bank of Canada
-5,910,242 sh
New Positions(22)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Polar Asset Management Partners Inc. | 180,000 | +180,000 | $5.0M | +$5.0M | — |
| SEI INVESTMENTS CO | 98,742 | +98,742 | $2.7M | +$2.7M | — |
| AYAL Capital Advisors Ltd | 72,200 | +72,200 | $2.0M | +$2.0M | — |
| LAZARD ASSET MANAGEMENT LLC | 58,426 | +58,426 | $1.6M | +$1.6M | — |
| FIL Ltd | 53,569 | +53,569 | $1.5M | +$1.5M | — |
| GUARDIAN CAPITAL LP | 47,063 | +47,063 | $1.3M | +$1.3M | — |
| Candelo Capital Management LP | 24,700 | +24,700 | $680.2K | +$680.2K | — |
| JANE STREET GROUP, LLC | 22,063 | +22,063 | $607.9K | +$607.9K | — |
| Numerai GP LLC | 16,305 | +16,305 | $449.0K | +$449.0K | — |
| Third View Private Wealth, LLC | 12,264 | +12,264 | $337.8K | +$337.8K | — |
| Savant Capital, LLC | 11,372 | +11,372 | $313.2K | +$313.2K | — |
| Investment Management Corp of Ontario | 10,116 | +10,116 | $278.6K | +$278.6K | — |
| Verition Fund Management LLC | 9,192 | +9,192 | $253.1K | +$253.1K | — |
| Campbell & CO Investment Adviser LLC | 8,805 | +8,805 | $242.5K | +$242.5K | — |
| Cresset Asset Management, LLC | 6,466 | +6,466 | $206.1K | +$206.1K | — |
| Smartleaf Asset Management LLC | 1,052 | +1,052 | $29.2K | +$29.2K | — |
| Ronald Blue Trust, Inc. | 733 | +733 | $20.2K | +$20.2K | — |
| Hillsdale Investment Management Inc. | 600 | +600 | $16.6K | +$16.6K | — |
| Leonteq Securities AG | 181 | +181 | $7.9K | +$7.9K | — |
| Bank of Jackson Hole Trust | 137 | +137 | $3.8K | +$3.8K | — |
| BlackRock, Inc. | 58 | +58 | $1.6K | +$1.6K | — |
| SkyView Investment Advisors, LLC | 10,966 | +10,966 | $302 | +$302 | — |
Added To(42)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| BANK OF MONTREAL /CAN/ | 3,022,693 | +1,790,040 | $83.3M | +$51.0M | 145.2% |
| Alberta Investment Management Corp | 1,340,265 | +918,100 | $36.9M | +$25.9M | 217.5% |
| EdgePoint Investment Group Inc. | 6,888,785 | +507,491 | $189.8M | +$22.9M | 8.0% |
| FMR LLC | 2,117,766 | +742,179 | $58.3M | +$22.4M | 54.0% |
| Connor, Clark & Lunn Investment Management Ltd. | 2,485,638 | +432,166 | $68.5M | +$14.8M | 21.0% |
| Public Sector Pension Investment Board | 287,829 | +225,923 | $7.9M | +$6.3M | 364.9% |
| VANGUARD GROUP INC | 3,397,166 | +55,731 | $93.6M | +$6.2M | 1.7% |
| Invesco Ltd. | 1,272,222 | +75,490 | $35.0M | +$3.7M | 6.3% |
| 1832 Asset Management L.P. | 818,559 | +79,828 | $22.5M | +$3.2M | 10.8% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1,141,835 | +32,605 | $31.5M | +$2.5M | 2.9% |
| TD Asset Management Inc | 1,193,208 | +11,446 | $32.9M | +$2.0M | 1.0% |
| Legal & General Group Plc | 542,023 | +47,414 | $14.9M | +$2.0M | 9.6% |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1,226,450 | +9,266 | $33.8M | +$1.9M | 0.8% |
| CITADEL ADVISORS LLC | 148,840 | +64,520 | $4.1M | +$1.9M | 76.5% |
| PRINCIPAL FINANCIAL GROUP INC | 878,240 | +4,100 | $24.2M | +$1.4M | 0.5% |
| FIRST TRUST ADVISORS LP | 184,128 | +35,416 | $5.1M | +$1.2M | 23.8% |
| ROYCE & ASSOCIATES LP | 164,500 | +30,000 | $4.5M | +$1.0M | 22.3% |
| MILLENNIUM MANAGEMENT LLC | 75,879 | +32,058 | $2.1M | +$941.6K | 73.2% |
| DIMENSIONAL FUND ADVISORS LP | 110,342 | +21,119 | $3.0M | +$701.4K | 23.7% |
| SIG North Trading, ULC | 55,642 | +19,642 | $1.5M | +$589.2K | 54.6% |
| BARCLAYS PLC | 21,628 | +17,120 | $689.5K | +$571.4K | 379.8% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 236,332 | +5,826 | $6.5M | +$487.0K | 2.5% |
| Swiss National Bank | 164,400 | +4,300 | $4.5M | +$347.6K | 2.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 59,255 | +9,023 | $1.7M | +$346.1K | 18.0% |
| FRANKLIN RESOURCES INC | 25,386 | +9,556 | $699.3K | +$285.3K | 60.4% |
| CITIGROUP INC | 25,149 | +8,707 | $693.7K | +$263.4K | 53.0% |
| BANK OF NOVA SCOTIA TRUST CO | 30,514 | +5,439 | $840.4K | +$183.4K | 21.7% |
| Canoe Financial LP | 80,600 | +1,723 | $2.2M | +$157.2K | 2.2% |
| Mariner, LLC | 12,167 | +3,143 | $335.1K | +$98.7K | 34.8% |
| NORGES BANK | 1,079,090 | +51,634 | $29.7M | -$80.4K | 5.0% |
| Northwest & Ethical Investments L.P. | 10,553 | +1,940 | $290.7K | +$65.4K | 22.5% |
| abrdn plc | 20,007 | +1,412 | $551.0K | +$61.6K | 7.6% |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | 27,215 | +10 | $750.7K | +$38.7K | 0.0% |
| Pictet Asset Management Holding SA | 16,006 | +468 | $441.5K | +$34.9K | 3.0% |
| STIFEL FINANCIAL CORP | 12,593 | +467 | $346.8K | +$29.1K | 3.9% |
| WELLS FARGO & COMPANY/MN | 711 | +79 | $19.6K | +$3.0K | 12.5% |
| Larson Financial Group LLC | 121 | +108 | $3.3K | +$3.0K | 830.8% |
| EverSource Wealth Advisors, LLC | 69 | +49 | $1.9K | +$1.4K | 245.0% |
| Pacer Advisors, Inc. | 137 | +38 | $3.8K | +$1.2K | 38.4% |
| Farther Finance Advisors, LLC | 263 | +20 | $7.2K | +$876 | 8.2% |
| VAN ECK ASSOCIATES CORP | 13,571 | +7,559 | $374 | +$216 | 125.7% |
| Main Management ETF Advisors, LLC | 29,754 | +304 | $819 | +$47 | 1.0% |
Reduced(58)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Royal Bank of Canada | 7,644,547 | -5,910,242 | $210.5M | -$176.6M | -43.6% |
| TURTLE CREEK ASSET MANAGEMENT INC. | 5,642,052 | -1,330,958 | $155.4M | -$27.3M | -19.1% |
| MASON CAPITAL MANAGEMENT LLC | 15,563,568 | 0 | $428.6M | +$20.9M | 0.0% |
| TD Waterhouse Canada Inc. | 966,349 | -463,883 | $26.5M | -$10.9M | -32.4% |
| MACKENZIE FINANCIAL CORP | 758,980 | -379,579 | $21.1M | -$8.7M | -33.3% |
| GOLDMAN SACHS GROUP INC | 285,377 | -222,508 | $7.9M | -$5.4M | -43.8% |
| FAIRFAX FINANCIAL HOLDINGS LTD/ CAN | 2,486,400 | 0 | $68.3M | +$4.1M | 0.0% |
| D. E. Shaw & Co., Inc. | 108,100 | -109,800 | $3.0M | -$2.7M | -50.4% |
| BANK OF AMERICA CORP /DE/ | 1,100,381 | -151,314 | $30.3M | -$2.5M | -12.1% |
| ACK Asset Management LLC | 1,846,196 | 0 | $50.8M | +$2.5M | 0.0% |
| Hill City Capital, LP | 1,649,857 | 0 | $45.4M | +$2.2M | 0.0% |
| Federation des caisses Desjardins du Quebec | 116,404 | -78,830 | $3.2M | -$1.8M | -40.4% |
| AGF MANAGEMENT LTD | 400,140 | -89,816 | $11.0M | -$1.8M | -18.3% |
| MORGAN STANLEY | 21,491 | -48,148 | $591.9K | -$1.2M | -69.1% |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | 815,031 | -647 | $30.8M | +$1.1M | -0.1% |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 753,492 | 0 | $20.8M | +$1.1M | 0.0% |
| Clearbridge Investments, LLC | 1,111,485 | -18,896 | $30.6M | +$994.3K | -1.7% |
| NATIONAL BANK OF CANADA /FI/ | 418,332 | -1,693 | $11.5M | +$643.9K | -0.4% |
| Russell Investments Group, Ltd. | 8,529 | -24,556 | $235.3K | -$630.5K | -74.2% |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 64,639 | -26,972 | $1.8M | -$614.3K | -29.4% |
| Rockefeller Capital Management L.P. | 9,790 | -18,941 | $270.0K | -$482.4K | -65.9% |
| Fiera Capital Corp | 71,007 | -22,152 | $2.0M | -$479.7K | -23.8% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 558,675 | -10,999 | $15.4M | +$460.5K | -1.9% |
| MONTRUSCO BOLTON INVESTMENTS INC. | 254,681 | -29,100 | $7.0M | -$401.0K | -10.3% |
| JANUS HENDERSON GROUP PLC | 861,839 | -36,504 | $23.8M | +$264.8K | -4.1% |
| ENVESTNET ASSET MANAGEMENT INC | 7,634 | -10,160 | $210.4K | -$255.7K | -57.1% |
| Focus Partners Wealth | 181,975 | -13 | $5.0M | +$243.0K | 0.0% |
| UBS Group AG | 228,774 | -2,821 | $6.3M | +$232.6K | -1.2% |
| Marathon Asset Management Ltd | 1,097,711 | -68,296 | $30.3M | -$231.4K | -5.8% |
| Granite Investment Partners, LLC | 203,876 | -1,971 | $5.6M | +$221.6K | -0.9% |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 76,426 | -34 | $2.1M | +$108.8K | -0.0% |
| Dixon Mitchell Investment Counsel Inc. | 211,025 | -7,500 | $5.8M | +$102.5K | -3.4% |
| CIBC Asset Management Inc | 131,500 | -3,354 | $3.6M | +$100.7K | -2.5% |
| TORONTO DOMINION BANK | 81,910 | -545 | $2.3M | +$94.3K | -0.7% |
| CIBC WORLD MARKET INC. | 354,069 | -15,444 | $9.8M | +$89.4K | -4.2% |
| Nuveen, LLC | 62,584 | 0 | $1.7M | +$88.6K | 0.0% |
| Caldwell Investment Management Ltd. | 60,800 | 0 | $1.7M | +$86.4K | 0.0% |
| LOUISBOURG INVESTMENTS INC. | 207,130 | -8,165 | $5.7M | +$83.0K | -3.8% |
| XTX Topco Ltd | 10,640 | -2,981 | $293.0K | -$63.8K | -21.9% |
| Aviso Financial Inc. | 51,725 | -518 | $1.4M | +$57.9K | -1.0% |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp | 43,753 | -4,053 | $1.2M | -$45.1K | -8.5% |
| SCOTIA CAPITAL INC. | 195,019 | -13,999 | $5.3M | -$35.4K | -6.7% |
| PenderFund Capital Management Ltd. | 20,000 | 0 | $550.9K | +$27.7K | 0.0% |
| ADVISOR GROUP HOLDINGS, INC. | 30 | -591 | $826 | -$16.3K | -95.2% |
| TRUE Private Wealth Advisors | 12,080 | 0 | $332.7K | +$16.2K | 0.0% |
| ALLIANCEBERNSTEIN L.P. | 8,960 | -860 | $246.8K | -$10.5K | -8.8% |
| Banque Cantonale Vaudoise | 261 | -99 | $7.0K | +$7.0K | -27.5% |
| Beutel, Goodman & Co Ltd. | 5,837,138 | -493,550 | $161.0K | -$4.7K | -7.8% |
| WOLVERINE ASSET MANAGEMENT LLC | 3,000 | -300 | $82.6K | -$3.6K | -9.1% |
| JPMORGAN CHASE & CO | 553 | -161 | $15.2K | -$3.5K | -22.5% |
| DEUTSCHE BANK AG\ | 10,261 | -627 | $282.6K | -$2.7K | -5.8% |
| Van Berkom & Associates Inc. | 269,136 | -858 | $7.4K | +$363 | -0.3% |
| Front Street Capital Management, Inc. | 286,994 | -2,778 | $7.9K | +$312 | -0.9% |
| JONES FINANCIAL COMPANIES LLLP | 36 | -13 | $991 | -$270 | -26.5% |
| WealthCollab, LLC | 89 | 0 | $2.5K | +$120 | 0.0% |
| Root Financial Partners, LLC | 40 | 0 | $1.1K | +$54 | 0.0% |
| Bell Investment Advisors, Inc | 20 | 0 | $551 | +$27 | 0.0% |
| HANTZ FINANCIAL SERVICES, INC. | 173 | 0 | $5 | $0 | 0.0% |
Sold Out(18)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Burgundy Asset Management Ltd. | 0 | -1,807,557 | $0 | -$50.0M | — |
| Galibier Capital Management Ltd. | 0 | -447,446 | $0 | -$11.7M | — |
| Foresight Group Ltd Liability Partnership | 0 | -388,892 | $0 | -$10.2M | — |
| Jarislowsky, Fraser Ltd | 0 | -334,904 | $0 | -$8.8M | — |
| Roubaix Capital, LLC | 0 | -223,532 | $0 | -$5.9M | — |
| NEW YORK STATE COMMON RETIREMENT FUND | 0 | -103,805 | $0 | -$4.1M | — |
| Bastion Asset Management Inc. | 0 | -72,655 | $0 | -$1.9M | — |
| Blackstone Inc. | 0 | -49,501 | $0 | -$1.3M | — |
| Lombard Odier Asset Management (Switzerland) SA | 0 | -21,515 | $0 | -$771.1K | — |
| AMUNDI | 0 | -27,180 | $0 | -$727.3K | — |
| BOOTHBAY FUND MANAGEMENT, LLC | 0 | -10,170 | $0 | -$266.1K | — |
| Quantbot Technologies LP | 0 | -4,665 | $0 | -$122.2K | — |
| State of Wyoming | 0 | -4,262 | $0 | -$111.7K | — |
| Quarry LP | 0 | -1,238 | $0 | -$32.4K | — |
| Tower Research Capital LLC (TRC) | 0 | -1,000 | $0 | -$26.2K | — |
| Caitong International Asset Management Co., Ltd | 0 | -143 | $0 | -$3.7K | — |
| SHELL ASSET MANAGEMENT CO | 0 | -1,302 | $0 | -$34 | — |
| SIMPLEX TRADING, LLC | 0 | -67 | $0 | -$1 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
New & Closed Positions this quarter
Closed Positions
18 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for ATS against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.