Security key
00217Y104
- Security type / class
- Equity / Common Shares
- Total 13F shares
- 86,213,629
- Total 13F value
- $2,148,649,459
- Share change
- +452,379
- Put/Call ratio
- 38%
- SEC-reported price per share
- $24.93
- Number of holders
- 119
- Value change
- -$142,465
- Number of buys
- 66
- Number of sells
- 57
- Shares outstanding
- 97,896,367
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2025
Institutions
119
Top holders
10
ATS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
ATS Corp /ATS SEC filings
ATS Corp /ATS company facts
Broader feeds
Reporting periods
Holder history for CUSIP 00217Y104
Recent filing periods:
Ownership snapshot
Top reported holders of ATS - ATS Corp /ATS - Common Shares (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
MASON CAPITAL MANAGEMENT LLC
Disclosed value leader
MASON CAPITAL MANAGEMENT LLC
Comparable rows
15/15
Latest evidence
31 Dec 2024
13F
Lead comparable stake: 15%
Showing 1-6 of 15 holder rows.
Quick read
MASON CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 15%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens MASON CAPITAL MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
MASON CAPITAL MANAGEMENT LLC
15%
Turtle Creek Asset Management Inc.
8.5%
Beutel, Goodman & Co Ltd.
6.7%
ROYAL BANK OF CANADA
5.4%
EdgePoint Investment Group Inc.
3.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| MASON CAPITAL MANAGEMENT LLC |
13F
Company
|
15%
|
$454,602,037
14,914,765 shares
|
— | 31 Dec 2024 |
| Turtle Creek Asset Management Inc. |
13F
Company
|
8.5%
|
$254,159,705
8,338,573 shares
|
— | 31 Dec 2024 |
| Beutel, Goodman & Co Ltd. |
13F
Company
|
6.7%
|
$198,614,000
6,515,682 shares
|
— | 31 Dec 2024 |
| ROYAL BANK OF CANADA |
13F
Company
|
5.4%
|
$161,786,000
5,307,964 shares
|
— | 31 Dec 2024 |
| EdgePoint Investment Group Inc. |
13F
Company
|
3.6%
|
$107,845,062
3,540,639 shares
|
— | 31 Dec 2024 |
| Capital World Investors |
13F
Company
|
3.5%
|
$105,212,401
3,449,762 shares
|
— | 31 Dec 2024 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
119
Shares
86,213,629
Rows available
119
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2025 vs Q1 2025 Across Filers
Q1 2025 holders
119
Q1 2025 holders
119
Holder diff
0
| Investor | Q1 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend