Who owns ATS Corporation?
Institutional ownership of ATS from SEC Form 13F filings across 90 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
90
13F holders
$1.11B
value, 2026 filers
38.6%
of shares outstanding (37.9M sh)
18
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ATS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | ROYAL BANK OF CANADA | 7.9M | $226.8M | 0.0% | 8% | +1.5% |
| 2 | BANK OF MONTREAL /CAN/ | 3.1M | $88.2M | 0.0% | 3.1% | -1.7% |
| 3 | FMR LLC | 2.9M | $83.7M | 0.0% | 3% | +27.6% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.4M | $69.1M | 0.0% | 2.4% | -49.3% |
| 5 | Jupiter Topco LLCNEW | 2.3M | $66.9M | 0.0% | 2.4% | new |
| 6 | TD Waterhouse Canada Inc. | 1.7M | $47.4M | 0.1% | 1.7% | +3.0% |
| 7 | FIL Ltd | 1.3M | $38.2M | 0.0% | 1.4% | -25.4% |
| 8 | BANK OF AMERICA CORP /DE/ | 1.1M | $32.3M | 0.0% | 1.1% | +18.6% |
| 9 | Connor, Clark & Lunn Investment Management Ltd. | 1.1M | $31.4M | 0.1% | 1.1% | -51.9% |
| 10 | NORGES BANKNEW | 1.1M | $31.2M | 0.0% | 1.1% | new |
| 11 | Clearbridge Investments, LLC | 1.1M | $30.5M | 0.0% | 1.1% | -2.8% |
| 12 | Legal & General Group Plc | 1.1M | $30.4M | 0.0% | 1.1% | +72.7% |
| 13 | TD Asset Management Inc | 1.0M | $28.9M | 0.0% | 1% | -29.4% |
| 14 | NATIONAL BANK OF CANADA /FI/ | 855,316 | $24.2M | 0.0% | 0.9% | +31.9% |
| 15 | VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | 795,619 | $32.5M | 0.2% | 0.8% | -7.9% |
| 16 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 788,784 | $22.7M | 0.0% | 0.8% | +4.0% |
| 17 | Public Sector Pension Investment Board | 756,002 | $21.8M | 0.1% | 0.8% | +111.9% |
| 18 | VANGUARD FIDUCIARY TRUST CO | 724,271 | $20.9M | 0.0% | 0.7% | -0.5% |
| 19 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 540,733 | $22.1M | 0.0% | 0.6% | +1.3% |
| 20 | MACKENZIE FINANCIAL CORP | 524,774 | $21.5M | 0.0% | 0.5% | -14.9% |
| 21 | TORONTO DOMINION BANK | 406,916 | $11.7M | 0.0% | 0.4% | +336.7% |
| 22 | CIBC WORLD MARKET INC. | 327,087 | $9.4M | 0.0% | 0.3% | -5.6% |
| 23 | Vanguard Global Advisers, LLC | 274,103 | $7.9M | 0.0% | 0.3% | +5.8% |
| 24 | Sixth Street Partners Management Company, L.P.NEW | 243,525 | $7.0M | 1.2% | 0.2% | new |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 243,525 | $7.0M | 0.0% | 0.2% | +2.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.