What does CUSIP 00217Y104 represent in this 13F holders report?

CUSIP 00217Y104 is the security identifier for ATS - ATS Corp /ATS - Common Shares used to aggregate holder disclosures.

How many institutions held ATS - ATS Corp /ATS - Common Shares in Q2 2026?

140 institutional investors reported ATS - ATS Corp /ATS - Common Shares for Q2 2026. Use the holders table for investor-level position and value details.

ATS Corp /ATS - Common Shares (ATS)

CUSIP: 00217Y104

Q2 2026 13F Holders as of 30 Jun 2026

Security type / class: Equity / Common Shares
Total 13F shares: 81,589,252
Total 13F value: $2,369,019,710
Share change: -3,502,220
Put/Call ratio: 852%
SEC-reported price per share: $28.78
Number of holders: 140
Value change: -$78,571,487
Number of buys: 78
Number of sells: 58
Shares outstanding: 97,896,367

Security key

00217Y104

Report period

Q2 2026

Institutions

140

Top holders

ATS full security history Ownership snapshot Full 13F holder table ATS Corp /ATS SEC filings ATS Corp /ATS company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

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 Mar 2026

13F 13D/G 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%

Turtle Creek Asset Management Inc. 5%

BANK OF NOVA SCOTIA 1.5%

MASON CAPITAL MANAGEMENT LLC 17%

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	13F 13D/G Company 13F 13D/G	6.6% from 13D/G	$218,884,000 7,761,838 shares	—	31 Mar 2026
EdgePoint Investment Group Inc.	13F 13D/G Company 13F 13D/G	6.6% from 13D/G	$202,081,247 7,168,112 shares	—	31 Mar 2026
Turtle Creek Asset Management Inc.	13D/G 13F Company 13D/G 13F	5%	$154,440,940 4,896,669 shares	-$23,509,380	31 Mar 2026
BANK OF NOVA SCOTIA	13D/G 13D/G	1.5%	$45,991,935 1,443,772 shares	-$119,696,952	30 Jun 2025
MASON CAPITAL MANAGEMENT LLC	13F Company 13F	17%	$462,597,594 16,404,170 shares	—	31 Mar 2026
Beutel, Goodman & Co Ltd.	13F Company 13F	5.6%	$153,259,000 5,454,749 shares	—	31 Mar 2026

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 Q2 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

140

81,589,252

Rows available

140

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 Q2 2026 vs Q1 2026 Across Filers

Q1 2026 holders

130

Q2 2026 holders

140

Holder diff

Investor	Q1 2026 Shares	Q2 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q2 2026 value	Value change	Value Chg %