Vault-13

ATS CORPORATION ATS

COM · Common Stock · CUSIP 00217Y104 · ISIN CA00217Y1043

132 institutional holders +9 vs Q1 2025
93,850,16393.9m shares reported held*
96.9% of all shares outstanding*
$3.0bnreported value*
21 new 48 added 51 reduced 12 sold out net bought ≈ $208.1m (+6.5m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.4m this quarter). Holder counts are more reliable. Shares outstanding: 96.9m as of 2025-03-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $31.90. Options: 6 managers hold calls ($2.9m notional), 6 hold puts ($9.8m).

Trends to Q2 2025

Institutional holders

Managers reporting a position, each quarter

050100150Q4 22: 1Q1 23: 2Q2 23: 132Q3 23: 129Q4 23: 134Q1 24: 138Q2 24: 133Q3 24: 131Q4 24: 130Q1 25: 123Q2 25: 132132Q4 22Q2 23Q4 23Q2 24Q4 24Q2 25
Numbers
QuarterHolders
Q4 20221
Q1 20232
Q2 2023132
Q3 2023129
Q4 2023134
Q1 2024138
Q2 2024133
Q3 2024131
Q4 2024130
Q1 2025123
Q2 2025132

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 23: 67 bought or addedQ3 23: 56 cut or sold outQ4 23: 73 bought or addedQ4 23: 56 cut or sold outQ4 23Q1 24: 86 bought or addedQ1 24: 55 cut or sold outQ2 24: 76 bought or addedQ2 24: 59 cut or sold outQ2 24Q3 24: 74 bought or addedQ3 24: 62 cut or sold outQ4 24: 69 bought or addedQ4 24: 62 cut or sold outQ4 24Q1 25: 68 bought or addedQ1 25: 60 cut or sold outQ2 25: 69 bought or addedQ2 25: 63 cut or sold outQ2 25
Numbers
QuarterBought or addedCut or sold out
Q3 20236756
Q4 20237356
Q1 20248655
Q2 20247659
Q3 20247462
Q4 20246962
Q1 20256860
Q2 20256963

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$5m$10m$15m$20mQ3 24 calls: $18.8mQ3 24 puts: $4.5mQ3 24P/C 0.24Q4 24 calls: $7.6mQ4 24 puts: $10.5mQ4 24P/C 1.39Q1 25 calls: $8.9mQ1 25 puts: $3.4mQ1 25P/C 0.38Q2 25 calls: $2.9mQ2 25 puts: $9.8mQ2 25P/C 3.40
Numbers
QuarterCallsPutsP/C
Q3 2024$18.8m$4.5m0.24
Q4 2024$7.6m$10.5m1.39
Q1 2025$8.9m$3.4m0.38
Q2 2025$2.9m$9.8m3.40

Biggest buyers

ROYAL BANK OF CANADA Added +7,669,074+7.7m
EdgePoint Investment Group Inc. Added +1,416,009+1.4m
Marathon Asset Management Ltd New +1,234,961+1.2m
Connor, Clark & Lunn Investment Management Ltd. Added +392,874+392.9k
MONTRUSCO BOLTON INVESTMENTS INC. New +318,781+318.8k
PICTON MAHONEY ASSET MANAGEMENT New +279,805+279.8k
Clearbridge Investments, LLC Added +245,437+245.4k
JARISLOWSKY, FRASER Ltd Added +241,688+241.7k
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. New +225,582+225.6k
MACKENZIE FINANCIAL CORP Added +210,570+210.6k

Biggest sellers

FIL Ltd Reduced -780,991-781.0k
TURTLE CREEK ASSET MANAGEMENT INC. Reduced -710,990-711.0k
Fiera Capital Corp Reduced -590,742-590.7k
Canoe Financial LP Reduced -532,185-532.2k
NICOLA WEALTH MANAGEMENT LTD. Sold out -523,300-523.3k
Rockefeller Capital Management L.P. Reduced -402,576-402.6k
Heathbridge Capital Management Ltd. Sold out -323,300-323.3k
Galibier Capital Management Ltd. Reduced -320,622-320.6k
Allspring Global Investments Holdings, LLC Sold out -251,058-251.1k
Select Equity Group, L.P. Sold out -242,640-242.6k

Biggest calls

SIG North Trading, ULC Reduced $2.3m73.0k shares
CITADEL ADVISORS LLC Added $468.6k14.7k shares
TORONTO DOMINION BANK Unchanged $79.8k2.5k shares
GROUP ONE TRADING LLC Unchanged $6.4k200 shares
SIMPLEX TRADING, LLC Reduced $3.0k100 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

BANK OF MONTREAL /CAN/ New $8.3m259.9k shares
SIG North Trading, ULC Added $1.3m41.8k shares
TORONTO DOMINION BANK Reduced $111.7k3.5k shares
WOLVERINE ASSET MANAGEMENT LLC New $63.8k2.0k shares
SIMPLEX TRADING, LLC New $15.0k500 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
ROYAL BANK OF CANADA 13G · institution +1.4 pts · filed 2026-02-13 6.6% +1.4 pts 6.5m≈ $186.7m 2026-02-13
EdgePoint Investment Group Inc. 13G · institution +1.5 pts · filed 2025-08-14 6.6% +1.5 pts 6.4m≈ $185.2m 2025-08-14
Beutel, Goodman & Co Ltd. 13G · institution +1.5 pts · filed 2026-10-06 6.4% +1.5 pts 4.8m≈ $138.1m 2026-10-06

Fell to 5% or below in the last year: Turtle Creek Asset Management Inc. (5.0%, 2026-05-15)

Insider purchases and sales in Q2 2025

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q2 2025.

Holders, Q2 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MASON CAPITAL MANAGEMENT LLC 97.00% of their portfolio NEW YORK, NY 15,563,56815.6m $496.2m $496.2m 97.00% Unchanged
2 ROYAL BANK OF CANADA 0.04% of their portfolio TORONTO, A6 14,149,24214.1m $451.1m $451.1m 0.04% Added +7.7m +7,669,074
3 TURTLE CREEK ASSET MANAGEMENT INC. 7.02% of their portfolio TORONTO, A6 7,590,5387.6m $242.0m $242.0m 7.02% Reduced -711.0k -710,990
4 Beutel, Goodman & Co Ltd. 1.24% of their portfolio TORONTO, A6 6,834,4886.8m $217.5m $217.5m 1.24% Reduced -217.8k -217,836
5 EdgePoint Investment Group Inc. 1.55% of their portfolio TORONTO, A6 6,434,0056.4m $205.3m $205.3m 1.55% Added +1.4m +1,416,009
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 3,272,1013.3m $104.4m $104.4m 0.00% Added +51.5k +51,529
7 FAIRFAX FINANCIAL HOLDINGS LTD/ CAN 4.23% of their portfolio TORONTO, A6 2,486,4002.5m $79.1m $79.1m 4.23% Unchanged
8 Connor, Clark & Lunn Investment Management Ltd. 0.27% of their portfolio VANCOUVER, A1 2,369,0282.4m $75.6m $75.6m 0.27% Added +392.9k +392,874
9 Clearbridge Investments, LLC 0.05% of their portfolio NEW YORK, NY 1,847,0361.8m $58.9m $58.9m 0.05% Added +245.4k +245,437
10 ACK Asset Management LLC 7.73% of their portfolio GREENWICH, CT 1,846,1961.8m $58.9m $58.9m 7.73% Reduced -167.0k -167,000
11 Burgundy Asset Management Ltd. 0.56% of their portfolio Toronto, A6 1,812,1471.8m $57.7m $57.7m 0.56% Added +43.4k +43,365
12 TD Waterhouse Canada Inc. 0.33% of their portfolio TORONTO, A6 1,452,3201.5m $46.4m $46.4m 0.33% Reduced -220.8k -220,776
13 MACKENZIE FINANCIAL CORP 0.06% of their portfolio TORONTO ONTARIO, A6 1,410,8331.4m $45.0m $45.0m 0.06% Added +210.6k +210,570
14 FMR LLC 0.00% of their portfolio BOSTON, MA 1,405,0121.4m $44.8m $44.8m 0.00% Reduced -81.6k -81,631
15 TD Asset Management Inc 0.03% of their portfolio Toronto, A6 1,278,8791.3m $40.7m $40.7m 0.03% Added +122.0k +122,017
16 Marathon Asset Management Ltd 1.26% of their portfolio London, X0 1,234,9611.2m $39.3m $39.3m 1.26% New
17 Hill City Capital, LP 2.10% of their portfolio BOSTON, MA 1,224,8571.2m $39.0m $39.0m 2.10% Reduced -75.0k -75,000
18 Capital World Investors 0.01% of their portfolio LOS ANGELES, CA 1,196,0001.2m $38.1m $38.1m 0.01% Unchanged
19 Invesco Ltd. 0.01% of their portfolio ATLANTA, GA 1,188,2271.2m $37.9m $37.9m 0.01% Reduced -213.9k -213,858
20 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.07% of their portfolio CAUSEWAY BAY, K3 1,112,9741.1m $35.4m $35.4m 0.07% Added +1.2k +1,174
21 BANK OF MONTREAL /CAN/ 0.02% of their portfolio TORONTO, A6 1,098,4241.1m $35.1m $35.1m 0.02% Added +52.9k +52,857
22 NORGES BANK 0.00% of their portfolio OSLO, Q8 1,027,4561.0m $32.8m $32.8m 0.00% Unchanged
23 JANUS HENDERSON GROUP PLC 0.01% of their portfolio LONDON, X0 922,164922.2k $29.4m $29.4m 0.01% Unchanged
24 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 861,833861.8k $27.5m $27.5m 0.00% Reduced -194.1k -194,131
25 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.05% of their portfolio TORONTO, A6 841,502841.5k $26.9m $26.9m 0.05% Added +200.3k +200,300
26 1832 Asset Management L.P. 0.05% of their portfolio TORONTO, A6 824,558824.6k $26.3m $26.3m 0.05% Reduced -20.5k -20,494
27 Scheer, Rowlett & Associates Investment Management Ltd. 1.64% of their portfolio TORONTO, A6 792,305792.3k $25.3m $25.3m 1.64% Added +159.8k +159,814
28 PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio DES MOINES, IA 783,440783.4k $24.9m $24.9m 0.01% Added +86.6k +86,600
29 Alberta Investment Management Corp 0.19% of their portfolio EDMONTON, A0 767,600767.6k $24.5m $24.5m 0.19% Reduced -198.5k -198,527
30 MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio Boston, MA 631,114631.1k $20.1m $20.1m 0.01% Added +118.0k +118,008
31 MOORE CAPITAL MANAGEMENT, LP 0.39% of their portfolio NEW YORK, NY 611,120611.1k $19.5m $19.5m 0.39% Reduced -111.4k -111,362
32 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 556,575556.6k $17.7m $17.7m 0.00% Added +122.5k +122,531
33 AGF MANAGEMENT LTD 0.07% of their portfolio TORONTO, A6 489,956490.0k $15.6m $15.6m 0.07% Reduced -51.8k -51,774
34 Galibier Capital Management Ltd. 4.65% of their portfolio TORONTO, A6 486,375486.4k $15.5m $15.5m 4.65% Reduced -320.6k -320,622
35 NATIONAL BANK OF CANADA /FI/ 0.02% of their portfolio MONTREAL, A8 439,018439.0k $14.0m $14.0m 0.02% Added +16.7k +16,674
36 Legal & General Group Plc 0.00% of their portfolio London, X0 438,440438.4k $14.0m $14.0m 0.00% Reduced -22.8k -22,764
37 Dixon Mitchell Investment Counsel Inc. 0.50% of their portfolio VANCOUVER, A1 402,125402.1k $12.8m $12.8m 0.50% Added +46.0k +46,000
38 Foresight Group Ltd Liability Partnership 1.72% of their portfolio London, X0 381,812381.8k $12.2m $12.2m 1.72% Reduced -4.5k -4,482
39 JARISLOWSKY, FRASER Ltd 0.07% of their portfolio MONTREAL, A8 379,208379.2k $12.1m $12.1m 0.07% Added +241.7k +241,688
40 CIBC WORLD MARKET INC. 0.03% of their portfolio TORONTO, A6 369,726369.7k $11.8m $11.8m 0.03% Added +23.5k +23,547
41 MONTRUSCO BOLTON INVESTMENTS INC. 0.11% of their portfolio MONTREAL, A8 318,781318.8k $10.1m $10.1m 0.11% New
42 Front Street Capital Management, Inc. 1.80% of their portfolio MISSOULA, MT 293,985294.0k $9.4m $9.4m 1.80% Added +5.0k +5,023
43 PICTON MAHONEY ASSET MANAGEMENT 0.13% of their portfolio Toronto, A6 279,805279.8k $8.9m $8.9m 0.13% New
44 Van Berkom & Associates Inc. 0.26% of their portfolio MONTREAL, A8 269,260269.3k $8.6m $8.6m 0.26% Added +37.5k +37,471
45 Federation des caisses Desjardins du Quebec 0.04% of their portfolio LEVIS, A8 266,968267.0k $8.5m $8.5m 0.04% Reduced -216.5k -216,520
46 UBS Group AG 0.00% of their portfolio ZURICH, V8 257,218257.2k $8.2m $8.2m 0.00% Reduced -79.5k -79,522
47 VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. 0.09% of their portfolio AMSTERDAM, P7 225,582225.6k $9.8m $9.8m 0.09% New
48 SCOTIA CAPITAL INC. 0.03% of their portfolio TORONTO, A6 203,774203.8k $6.5m $6.5m 0.03% Added +7.5k +7,513
49 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 200,237200.2k $6.4m $6.4m 0.00% Reduced -373 -373
50 Swiss National Bank 0.00% of their portfolio ZURICH, V8 160,100160.1k $5.1m $5.1m 0.00% Reduced -2.2k -2,200
51 Granite Investment Partners, LLC 0.24% of their portfolio EL SEGUNDO, CA 153,040153.0k $4.9m $4.9m 0.24% Reduced -4.6k -4,641
52 Fiera Capital Corp 0.01% of their portfolio MONTREAL, A8 132,369132.4k $4.2m $4.2m 0.01% Reduced -590.7k -590,742
53 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 130,873130.9k $4.2m $4.2m 0.00% Reduced -170.8k -170,814
54 ROYCE & ASSOCIATES LP 0.04% of their portfolio New York, NY 125,500125.5k $4.0m $4.0m 0.04% Added +5.0k +5,000
55 Lombard Odier Asset Management (Europe) Ltd 0.28% of their portfolio LONDON, X0 122,148122.1k $3.9m $3.9m 0.28% Added +7.8k +7,833
56 FIRST TRUST ADVISORS LP 0.00% of their portfolio Wheaton, IL 120,088120.1k $3.8m $3.8m 0.00% Added +3.4k +3,382
57 Waratah Capital Advisors Ltd. 0.26% of their portfolio TORONTO, A6 118,480118.5k $3.8m $3.8m 0.26% Added +11.3k +11,305
58 LOUISBOURG INVESTMENTS INC. 0.76% of their portfolio DIEPPE, A3 101,522101.5k $3.2m $3.2m 0.76% New
59 NATIXIS ADVISORS, LLC 0.01% of their portfolio Boston, MA 98,91298.9k $3.2m $3.2m 0.01% Added +12.8k +12,765
60 Canoe Financial LP 0.04% of their portfolio CALGARY, A0 81,11481.1k $2.6m $2.6m 0.04% Reduced -532.2k -532,185
61 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 80,96281.0k $2.6m $2.6m 0.00% Reduced -924 -924
62 CIBC Asset Management Inc 0.01% of their portfolio TORONTO, Z4 79,70379.7k $2.5m $2.5m 0.01% Reduced -23.7k -23,675
63 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 77,06277.1k $2.5m $2.5m 0.00% Added +33.5k +33,489
64 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 63,16163.2k $2.0m $2.0m 0.00% Reduced -59.9k -59,894
65 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 62,58462.6k $2.0m $2.0m 0.00% Reduced -3.5k -3,522
66 Caldwell Investment Management Ltd. 1.68% of their portfolio TORONTO, A6 60,80060.8k $1.9m $1.9m 1.68% Unchanged
67 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 58,57258.6k $1.9m $1.9m 0.00% Added +27.7k +27,672
68 Aviso Financial Inc. 0.07% of their portfolio TORONTO, A6 50,65350.7k $1.6m $1.6m 0.07% Added +452 +452
69 BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp 0.01% of their portfolio VICTORIA, A1 50,51650.5k $1.6m $1.6m 0.01% Added +3.6k +3,645
70 Rockefeller Capital Management L.P. 0.00% of their portfolio NEW YORK, NY 46,97447.0k $1.5m $1.5m 0.00% Reduced -402.6k -402,576
71 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 45,85545.9k $1.5m $1.5m 0.00% Added +2.6k +2,605
72 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 43,24043.2k $1.4m $1.4m 0.00% Reduced -17.3k -17,336
73 Lombard Odier Asset Management (Switzerland) SA 0.06% of their portfolio PETIT-LANCY, V8 39,57239.6k $1.3m $1.3m 0.06% New
74 FIL Ltd 0.00% of their portfolio HAMILTON, D0 35,43635.4k $1.1m $1.1m 0.00% Reduced -781.0k -780,991
75 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 32,22532.2k $1.0m $1.0m 0.00% Reduced -9.9k -9,860
76 Ewing Morris & Co. Investment Partners Ltd. 0.45% of their portfolio TORONTO, Z4 31,60031.6k $1.0m $1.0m 0.45% Added +3.3k +3,320
77 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 29,85929.9k $950.4k $950.4k 0.00% Reduced -50.4k -50,377
78 Northwest & Ethical Investments L.P. 0.02% of their portfolio TORONTO, A6 29,54329.5k $941.4k $941.4k 0.02% Added +21.2k +21,210
79 Trexquant Investment LP 0.01% of their portfolio STAMFORD, CT 28,80328.8k $918.2k $918.2k 0.01% New
80 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 28,08228.1k $895.3k $895.3k 0.00% New
81 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 27,27927.3k $868.2k $868.2k 0.00% Added +4.2k +4,151
82 Amundi 0.00% of their portfolio Paris, I0 27,18027.2k $888.0k $888.0k 0.00% Reduced -3.4k -3,358
83 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 27,15227.2k $864.3k $864.3k 0.00% Reduced -2.6k -2,619
84 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 26,09226.1k $831.8k $831.8k 0.00% New
85 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 22,79022.8k $726.3k $726.3k 0.00% Reduced -103.5k -103,503
86 BANK OF NOVA SCOTIA TRUST CO 0.07% of their portfolio TORONTO, A6 21,80221.8k $695.0k $695.0k 0.07% Added +4.1k +4,089
87 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 21,62821.6k $689.5k $689.5k 0.00% Reduced -172 -172
88 Onex Canada Asset Management Inc. 0.07% of their portfolio TORONTO, A6 19,05319.1k $607.5k $607.5k 0.07% Reduced -24.2k -24,246
89 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 17,10617.1k $545.9k $545.9k 0.00% Added +1.2k +1,171
90 Aberdeen Group plc 0.00% of their portfolio EDINBURGH, X0 16,20516.2k $516.6k $516.6k 0.00% Added +2.9k +2,869
91 Mariner, LLC 0.00% of their portfolio Overland Park, KS 15,64015.6k $498.6k $498.6k 0.00% Reduced -1.8k -1,760
92 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 14,00014.0k $446.3k $446.3k 0.00% Unchanged
93 Pictet Asset Management Holding SA 0.00% of their portfolio CAROUGE, V8 13,87313.9k $441.6k $441.6k 0.00% Reduced -226 -226
94 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 12,61012.6k $401.4k $401.4k 0.00% Added +4.2k +4,151
95 TRUE Private Wealth Advisors 0.04% of their portfolio Salem, OR 12,08012.1k $385.1k $385.1k 0.04% Unchanged
96 Nebula Research & Development LLC 0.03% of their portfolio New York, NY 11,28311.3k $359.7k $359.7k 0.03% Reduced -3.4k -3,421
97 XTX Topco Ltd 0.01% of their portfolio LONDON, X0 10,94110.9k $348.8k $348.8k 0.01% New
98 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 10,77410.8k $343.5k $343.5k 0.00% Reduced -467 -467
99 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 9,96510.0k $317.7k $317.7k 0.00% Added +2.3k +2,346
100 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 9,3719.4k $298.8k $298.8k 0.00% New