Security key
00217Y104
- Security type / class
- Equity / Common Shares
- Total 13F shares
- 74,333,688
- Total 13F value
- $3,204,670,256
- Share change
- +919,393
- SEC-reported price per share
- $43.10
- Number of holders
- 129
- Value change
- +$39,296,602
- Number of buys
- 70
- Number of sells
- 56
- Shares outstanding
- 98,129,639
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2023
Institutions
129
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
30 Sep 2023
13F
Lead comparable stake: 18%
Showing 1-6 of 15 holder rows.
Quick read
MASON CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 18%.
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
18%
Capital International Investors
6.1%
FMR LLC
5.5%
Capital World Investors
4.2%
ROYAL BANK OF CANADA
2.9%
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
|
18%
|
$760,756,984
17,849,765 shares
|
— | 30 Sep 2023 |
| Capital International Investors |
13F
Company
|
6.1%
|
$253,351,302
5,943,254 shares
|
— | 30 Sep 2023 |
| FMR LLC |
13F
Company
|
5.5%
|
$228,980,272
5,371,545 shares
|
— | 30 Sep 2023 |
| Capital World Investors |
13F
Company
|
4.2%
|
$175,203,247
4,110,014 shares
|
— | 30 Sep 2023 |
| ROYAL BANK OF CANADA |
13F
Company
|
2.9%
|
$123,210,000
2,890,916 shares
|
— | 30 Sep 2023 |
| VANGUARD GROUP INC |
13F
Company
|
2.9%
|
$121,582,117
2,852,701 shares
|
— | 30 Sep 2023 |
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 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
129
Shares
74,333,688
Rows available
129
| 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 2023 vs Q3 2023 Across Filers
Q3 2023 holders
122
Q4 2023 holders
129
Holder diff
7
| Investor | Q3 2023 Shares | Q4 2023 Shares | Share Diff | Share Chg % | Q3 2023 value | Q4 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend