Security key
00217Y104
- Security type / class
- Equity / Common Shares
- Total 13F shares
- 83,011,700
- Total 13F value
- $2,295,067,617
- Share change
- +2,034,369
- Put/Call ratio
- 11%
- SEC-reported price per share
- $27.55
- Number of holders
- 121
- Value change
- +$56,882,620
- Number of buys
- 62
- Number of sells
- 56
- Shares outstanding
- 98,129,639
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
Q4 2025
Institutions
121
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
ROYAL BANK OF CANADA
Disclosed value leader
MASON CAPITAL MANAGEMENT LLC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
13F
Lead comparable stake: 6.6%
13D/G row: ROYAL BANK OF CANADA
Showing 1-6 of 15 holder rows.
Quick read
ROYAL BANK OF CANADA leads the comparable SEC ownership view at 6.6%.
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 ROYAL BANK OF CANADA's linked filing trail.
Comparable ownership
Top 5
ROYAL BANK OF CANADA
6.6%
EdgePoint Investment Group Inc.
6.6%
BANK OF NOVA SCOTIA
1.5%
MASON CAPITAL MANAGEMENT LLC
16%
Turtle Creek Asset Management Inc.
7.1%
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 |
|---|---|---|---|---|---|
| ROYAL BANK OF CANADA |
13D/G
13F
Company
|
6.6%
|
$191,879,248
6,486,790 shares
|
+$39,473,652 | 31 Dec 2025 |
| EdgePoint Investment Group Inc. |
13D/G
13F
Company
|
6.6%
|
$188,258,986
6,434,005 shares
|
+$41,432,423 | 30 Jun 2025 |
| BANK OF NOVA SCOTIA |
13D/G
|
1.5%
|
$45,991,935
1,443,772 shares
|
-$119,696,952 | 30 Jun 2025 |
| MASON CAPITAL MANAGEMENT LLC |
13F
Company
|
16%
|
$407,765,482
15,563,568 shares
|
— | 30 Sep 2025 |
| Turtle Creek Asset Management Inc. |
13F
Company
|
7.1%
|
$182,692,862
6,973,010 shares
|
— | 30 Sep 2025 |
| Beutel, Goodman & Co Ltd. |
13F
Company
|
6.5%
|
$165,660,000
6,330,688 shares
|
— | 30 Sep 2025 |
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 Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
121
Shares
83,011,700
Rows available
121
| 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 Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
115
Q4 2025 holders
121
Holder diff
6
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend