Vault-13

ATS CORPORATION ATS

COM · Common Stock · CUSIP 00217Y104 · ISIN CA00217Y1043

132 institutional holders +130 vs Q1 2023
76,154,62876.2m shares reported held*
$3.5bnreported value*
126 new 1 added 1 reduced 0 sold out net bought ≈ $3.4bn (+73.3m 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 ($995.6k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $46.38. Options: 2 managers hold calls ($7.3m notional), 1 hold puts ($0).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

050100150Q4 22: 1Q1 23: 2Q2 23: 132132Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q4 20221
Q1 20232
Q2 2023132

Buyers vs sellers

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

Bought or addedCut or sold out
2000200Q1 23: 0 bought or addedQ1 23: 0 cut or sold outQ1 23Q2 23: 127 bought or addedQ2 23: 1 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q1 202300
Q2 20231271

Calls vs puts

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

CallsPuts
$0$2m$4m$6m$8mQ3 22 calls: $0Q3 22 puts: $0Q3 22P/C —Q4 22 calls: $0Q4 22 puts: $0Q4 22P/C —Q1 23 calls: $0Q1 23 puts: $0Q1 23P/C —Q2 23 calls: $7.3mQ2 23 puts: $0Q2 23P/C 0.00
Numbers
QuarterCallsPutsP/C
Q3 2022$0$0—
Q4 2022$0$0—
Q1 2023$0$0—
Q2 2023$7.3m$00.00

Biggest buyers

MASON CAPITAL MANAGEMENT LLC New +17,849,765+17.8m
Capital International Investors New +5,906,119+5.9m
FMR LLC New +4,451,613+4.5m
Capital World Investors New +4,110,014+4.1m
ROYAL BANK OF CANADA New +3,088,815+3.1m
VANGUARD GROUP INC New +2,622,936+2.6m
TURTLE CREEK ASSET MANAGEMENT INC. New +2,329,131+2.3m
EdgePoint Investment Group Inc. New +2,174,662+2.2m
Connor, Clark & Lunn Investment Management Ltd. New +1,941,692+1.9m
FIL Ltd New +1,848,598+1.8m

Biggest sellers

Canoe Financial LP Reduced -104,163-104.2k

Biggest calls

Biggest puts

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 2023

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 2023.

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MASON CAPITAL MANAGEMENT LLC 80.16% of their portfolio NEW YORK, NY 17,849,76517.8m $822.7m $822.7m 80.16% New
2 Capital International Investors 0.07% of their portfolio Los Angeles, CA 5,906,1195.9m $271.7m $271.7m 0.07% New
3 FMR LLC 0.02% of their portfolio BOSTON, MA 4,451,6134.5m $204.8m $204.8m 0.02% New
4 Capital World Investors 0.04% of their portfolio LOS ANGELES, CA 4,110,0144.1m $189.1m $189.1m 0.04% New
5 ROYAL BANK OF CANADA 0.04% of their portfolio TORONTO, A6 3,088,8153.1m $142.4m $142.4m 0.04% New
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,622,9362.6m $120.9m $120.9m 0.00% New
7 TURTLE CREEK ASSET MANAGEMENT INC. 3.08% of their portfolio TORONTO, A6 2,329,1312.3m $107.3m $107.3m 3.08% New
8 EdgePoint Investment Group Inc. 0.90% of their portfolio TORONTO, A6 2,174,6622.2m $100.1m $100.1m 0.90% New
9 Connor, Clark & Lunn Investment Management Ltd. 0.45% of their portfolio VANCOUVER, A1 1,941,6921.9m $89.3m $89.3m 0.45% New
10 FIL Ltd 0.10% of their portfolio HAMILTON, D0 1,848,5981.8m $85.1m $85.1m 0.10% New
11 Clearbridge Investments, LLC 0.07% of their portfolio NEW YORK, NY 1,650,8411.7m $76.1m $76.1m 0.07% New
12 JANUS HENDERSON GROUP PLC 0.04% of their portfolio LONDON, X0 1,554,2331.6m $71.6m $71.6m 0.04% New
13 ACK Asset Management LLC 7.01% of their portfolio GREENWICH, CT 1,221,3411.2m $56.3m $56.3m 7.01% Added +146.3k +146,341
14 MACKENZIE FINANCIAL CORP 0.08% of their portfolio TORONTO ONTARIO, A6 1,170,9371.2m $53.9m $53.9m 0.08% New
15 Waratah Capital Advisors Ltd. 2.68% of their portfolio TORONTO, A6 1,154,6511.2m $53.1m $53.1m 2.68% New
16 Beutel, Goodman & Co Ltd. 0.30% of their portfolio TORONTO, A6 1,150,1351.2m $53.0m $53.0m 0.30% New
17 ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio NASHVILLE, TN 1,131,0361.1m $52.1m $52.1m 0.02% New
18 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.03% of their portfolio Toronto, A6 1,040,1511.0m $47.8m $47.8m 0.03% New
19 Mirae Asset Global Investments Co., Ltd. 0.10% of their portfolio SEOUL, M5 978,121978.1k $45.1m $45.1m 0.10% New
20 NORGES BANK 0.01% of their portfolio OSLO, Q8 883,299883.3k $40.6m $40.6m 0.01% Not comparable
21 AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio KANSAS CITY, MO 854,925854.9k $39.4m $39.4m 0.03% New
22 Perpetual Ltd 0.32% of their portfolio SYDNEY, NEW SOUTH WALES, C3 804,441804.4k $37.0m $37.0m 0.32% New
23 TD Waterhouse Canada Inc. 0.47% of their portfolio TORONTO, A6 787,227787.2k $47.3m $47.3m 0.47% New
24 Canoe Financial LP 0.72% of their portfolio CALGARY, A0 745,089745.1k $34.3m $34.3m 0.72% Reduced -104.2k -104,163
25 STATE OF WISCONSIN INVESTMENT BOARD 0.09% of their portfolio MADISON, WI 697,687697.7k $32.1m $32.1m 0.09% New
26 BANK OF MONTREAL /CAN/ 0.01% of their portfolio TORONTO, A6 675,976676.0k $31.1m $31.1m 0.01% New
27 Alberta Investment Management Corp 0.28% of their portfolio EDMONTON, A0 629,000629.0k $29.0m $29.0m 0.28% New
28 CITADEL ADVISORS LLC 0.03% of their portfolio MIAMI, FL 605,132605.1k $27.9m $27.9m 0.03% New
29 Fiera Capital Corp 0.08% of their portfolio MONTREAL, A8 575,470575.5k $26.5m $26.5m 0.08% New
30 Triasima Portfolio Management inc. 2.07% of their portfolio MONTREAL, A8 536,472536.5k $32.7m $32.7m 2.07% New
31 VICTORY CAPITAL MANAGEMENT INC 0.03% of their portfolio San Antonio, TX 521,546521.5k $24.0m $24.0m 0.03% New
32 MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio Boston, MA 515,340515.3k $23.8m $23.8m 0.01% New
33 TD Asset Management Inc 0.03% of their portfolio Toronto, A6 504,595504.6k $23.2m $23.2m 0.03% New
34 PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio DES MOINES, IA 470,230470.2k $21.7m $21.7m 0.01% New
35 T. Rowe Price Investment Management, Inc. 0.01% of their portfolio BALTIMORE, MD 447,449447.4k $20.6m $20.6m 0.01% New
36 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 445,934445.9k $20.6m $20.6m 0.00% New
37 NATIXIS ADVISORS, LLC 0.06% of their portfolio Boston, MA 440,689440.7k $20.3m $20.3m 0.06% New
38 AVIVA PLC 0.08% of their portfolio LONDON, X0 438,979439.0k $20.2m $20.2m 0.08% New
39 CIBC Asset Management Inc 0.07% of their portfolio TORONTO, Z4 398,332398.3k $18.3m $18.3m 0.07% New
40 CIBC WORLD MARKET INC. 0.06% of their portfolio TORONTO, A6 369,744369.7k $17.0m $17.0m 0.06% New
41 NATIONAL BANK OF CANADA /FI/ 0.03% of their portfolio MONTREAL, A8 359,500359.5k $16.5m $16.5m 0.03% New
42 1832 Asset Management L.P. 0.03% of their portfolio TORONTO, A6 342,860342.9k $15.8m $15.8m 0.03% New
43 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 337,768337.8k $15.6m $15.6m 0.00% New
44 Capital Group Private Client Services, Inc. 0.16% of their portfolio Los Angeles, CA 303,186303.2k $13.9m $13.9m 0.16% New
45 Schonfeld Strategic Advisors LLC 0.11% of their portfolio NEW YORK, NY 266,800266.8k $12.3m $12.3m 0.11% New
46 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.05% of their portfolio TORONTO, A6 243,902243.9k $11.2m $11.2m 0.05% New
47 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 228,144228.1k $10.5m $10.5m 0.00% New
48 Capital International, Inc./CA/ 0.17% of their portfolio Los Angeles, CA 203,279203.3k $9.4m $9.4m 0.17% New
49 Zimmer Partners, LP 0.23% of their portfolio NEW YORK, NY 200,000200.0k $9.2m $9.2m 0.23% New
50 Van Berkom & Associates Inc. 0.31% of their portfolio MONTREAL, A8 188,526188.5k $8.7m $8.7m 0.31% New
51 Caldwell Investment Management Ltd. 6.45% of their portfolio TORONTO, A6 186,800186.8k $8.5m $8.5m 6.45% New
52 SCOTIA CAPITAL INC. 0.06% of their portfolio TORONTO, A6 178,569178.6k $8.2m $8.2m 0.06% New
53 GUARDIAN CAPITAL LP 0.25% of their portfolio TORONTO, A6 170,023170.0k $7.8m $7.8m 0.25% New
54 Public Sector Pension Investment Board 0.06% of their portfolio MONTREAL, A8 170,001170.0k $7.8m $7.8m 0.06% New
55 Hillsdale Investment Management Inc. 0.70% of their portfolio Toronto, A6 166,600166.6k $7.7m $7.7m 0.70% New
56 BAROMETER CAPITAL MANAGEMENT INC. 2.66% of their portfolio TORONTO, A6 163,735163.7k $10.0m $10.0m 2.66% New
57 Swiss National Bank 0.01% of their portfolio ZURICH, V8 159,900159.9k $7.4m $7.4m 0.01% New
58 Global IMC LLC 2.14% of their portfolio SOLANA BEACH, CA 158,219158.2k $7.3m $7.3m 2.14% New
59 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 152,385152.4k $7.0m $7.0m 0.00% New
60 ROYCE & ASSOCIATES LP 0.06% of their portfolio New York, NY 128,150128.2k $5.9m $5.9m 0.06% New
61 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 126,900126.9k $5.8m $5.8m 0.01% New
62 PCJ Investment Counsel Ltd. 2.47% of their portfolio TORONTO, A6 126,525126.5k $5.8m $5.8m 2.47% New
63 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 119,036119.0k $7.3m $7.3m 0.01% New
64 INTACT INVESTMENT MANAGEMENT INC. 0.22% of their portfolio MONTREAL, A8 118,670118.7k $5.5m $5.5m 0.22% New
65 Burgundy Asset Management Ltd. 0.05% of their portfolio Toronto, A6 101,041101.0k $4.7m $4.7m 0.05% New
66 NewGen Asset Management Ltd 3.35% of their portfolio TORONTO, A6 96,10096.1k $4.4m $4.4m 3.35% New
67 CAPITAL INTERNATIONAL SARL 0.17% of their portfolio Los Angeles, CA 84,43484.4k $3.9m $3.9m 0.17% New
68 Dixon Mitchell Investment Counsel Inc. 0.22% of their portfolio VANCOUVER, A1 83,02583.0k $3.8m $3.8m 0.22% New
69 Handelsbanken Fonder AB 0.02% of their portfolio STOCKHOLM, V7 73,50073.5k $3.4m $3.4m 0.02% New
70 AGF MANAGEMENT LTD 0.02% of their portfolio TORONTO, A6 62,39262.4k $2.9m $2.9m 0.02% New
71 CAAS CAPITAL MANAGEMENT LP 1.36% of their portfolio NEW YORK, NY 61,40961.4k $2.8m $2.8m 1.36% New
72 JARISLOWSKY, FRASER Ltd 0.02% of their portfolio MONTREAL, A8 60,99461.0k $2.8m $2.8m 0.02% New
73 Credential Qtrade Securities Inc. 0.17% of their portfolio VANCOUVER, A1 57,13857.1k $2.6m $2.6m 0.17% New
74 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 54,10554.1k $2.5m $2.5m 0.01% New
75 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 53,94753.9k $2.5m $2.5m 0.00% New
76 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 52,44552.4k $2.4m $2.4m 0.00% New
77 CAPITAL INTERNATIONAL LTD /CA/ 0.13% of their portfolio LOS ANGELES, CA 48,60748.6k $2.2m $2.2m 0.13% New
78 Northwest & Ethical Investments L.P. 0.07% of their portfolio TORONTO, A6 47,25847.3k $2.2m $2.2m 0.07% New
79 O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.03% of their portfolio Stamford, CT 46,28546.3k $2.1m $2.1m 0.03% New
80 BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp 0.02% of their portfolio VICTORIA, A1 43,62943.6k $2.0m $2.0m 0.02% New
81 Rockefeller Capital Management L.P. 0.01% of their portfolio NEW YORK, NY 42,61242.6k $2.0m $2.0m 0.01% First filing
82 FAIRFAX FINANCIAL HOLDINGS LTD/ CAN 0.10% of their portfolio TORONTO, A6 40,00040.0k $1.8m $1.8m 0.10% New
83 Lombard Odier Asset Management (Europe) Ltd 0.15% of their portfolio LONDON, X0 39,36439.4k $3.2m $3.2m 0.15% New
84 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio BOSTON, MA 36,94836.9k $1.7m $1.7m 0.00% New
85 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 31,08431.1k $1.5m $1.5m 0.00% New
86 ELEMENT CAPITAL MANAGEMENT LLC 0.09% of their portfolio New York, NY 29,49729.5k $1.4m $1.4m 0.09% New
87 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 27,25527.3k $1.3m $1.3m 0.00% New
88 Ghisallo Capital Management LLC 0.15% of their portfolio BOSTON, MA 26,86926.9k $1.2m $1.2m 0.15% New
89 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 24,70724.7k $1.1m $1.1m 0.00% New
90 CIDEL ASSET MANAGEMENT INC 0.05% of their portfolio TORONTO, A6 21,98522.0k $1.0m $1.0m 0.05% New
91 Aberdeen Group plc 0.00% of their portfolio EDINBURGH, X0 21,62221.6k $996.6k $996.6k 0.00% New
92 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 20,76120.8k $956.9k $956.9k 0.00% New
93 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 17,46017.5k $803.8k $803.8k 0.00% New
94 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 17,41517.4k $801.1k $801.1k 0.00% New
95 Saltoro Capital, LP 2.32% of their portfolio DALLAS, TX 14,25014.2k $868.5k $868.5k 2.32% New
96 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 13,27313.3k $611.8k $611.8k 0.00% New
97 Tacita Capital Inc 0.45% of their portfolio TORONTO, A6 13,26513.3k $611.0k $611.0k 0.45% New
98 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 12,86812.9k $592.7k $592.7k 0.00% New
99 TRUE Private Wealth Advisors 0.08% of their portfolio Salem, OR 12,32312.3k $568.0k $568.0k 0.08% New
100 Federation des caisses Desjardins du Quebec 0.01% of their portfolio LEVIS, A8 12,29212.3k $565.5k $565.5k 0.01% New