122 tracked 13F filers disclose a position in ATS as of the latest SEC 13F filings, a combined $2.2B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | MASON CAPITAL MANAGEMENT LLC | $462.6M | 16.4M | ▲+5.4% Added · +841K sh | Q1 2026 | |
| 2 | ROYAL BANK OF CANADA | $218.9M | 7.8M | ▲+1.5% Added · +117K sh | Q1 2026 | |
| 3 | EdgePoint Investment Group Inc. | $202.1M | 7.2M | ▲+4.0% Added · +279K sh | Q1 2026 | |
| 4 | Turtle Creek Asset Management Inc. | $138.1M | 4.9M | ▼−13% Reduced · −745K sh | Q1 2026 | |
| 5 | BANK OF MONTREAL /CAN/ | $87.8M | 3.1M | ▲+3.1% Added · +93K sh | Q1 2026 | |
| 6 | FAIRFAX FINANCIAL HOLDINGS LTD/ CAN | $70.5M | 2.5M | —Held | Q2 2026 | |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $66.7M | 2.4M | →First observed position No prior filed position | Q1 2026 | |
| 8 | JANUS HENDERSON GROUP PLC | $64.5M | 2.3M | ▲+167% Added · +1.4M sh | Q1 2026 | |
| 9 | FMR LLC | $64.2M | 2.3M | ▲+7.5% Added · +160K sh | Q1 2026 | |
| 10 | Vinva Investment Management Ltd | $36.5M | 2.1M | ▲New +2.1M sh | Q1 2026 | |
| 11 | FIL Ltd | $50.1M | 1.8M | ▲33× Added · +1.7M sh | Q1 2026 | |
| 12 | TD Waterhouse Canada Inc. | $47.4M | 1.7M | ▲+3.0% Added · +49K sh | Q2 2026 | |
| 13 | Hill City Capital, LP | $47.5M | 1.6M | —Held | Q2 2026 | |
| 14 | ACK Asset Management LLC | $43.2M | 1.5M | ▼−19% Reduced · −346K sh | Q2 2026 | |
| 15 | TD ASSET MANAGEMENT INC | $40.0M | 1.4M | ▲+19% Added · +229K sh | Q1 2026 | |
| 16 | Alberta Investment Management Corp | $33.9M | 1.2M | ▲+25% Added · +237K sh | Q2 2026 | |
| 17 | Marathon Asset Management Ltd | $30.7M | 1.1M | ▼−0.3% Reduced · −4K sh | Q1 2026 | |
| 18 | Clearbridge Investments, LLC | $30.8M | 1.1M | ▼−1.8% Reduced · −20K sh | Q1 2026 | |
| 19 | Connor, Clark & Lunn Investment Management Ltd. | $31.4M | 1.1M | ▼−52% Reduced · −1.2M sh | Q2 2026 | |
| 20 | NORGES BANK | $29.7M | 1.1M | ▲+5.0% Added · +52K sh | Q4 2025 | |
| 21 | BANK OF AMERICA CORP /DE/ | $26.7M | 946K | ▼−14% Reduced · −155K sh | Q1 2026 | |
| 22 | VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | $33.9M | 863K | ▲+5.9% Added · +48K sh | Q1 2026 | |
| 23 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $21.3M | 758K | ▼−34% Reduced · −384K sh | Q1 2026 | |
| 24 | VANGUARD FIDUCIARY TRUST CO | $20.5M | 728K | →First observed position No prior filed position | Q1 2026 | |
| 25 | NATIONAL BANK OF CANADA /FI/ | $18.1M | 648K | ▲+55% Added · +230K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 11 funds opened a new position in ATS and 28 added to an existing one, while 15 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| AMAZON.COM INCAMZN | 62 funds | $82.2B |
| MICROSOFT CORPMSFT | 61 funds | $105.9B |
| NVIDIA CORPNVDA | 59 funds | $141.8B |
| VISA INC-CLASS A SHARESV | 59 funds | $26.0B |
| ALPHABET INC-CL AGOOGL | 57 funds | $60.1B |
| JPMORGAN CHASE & COJPM | 57 funds | $27.7B |
| APPLE INCAAPL | 56 funds | $103.4B |
| MASTERCARD INC - AMA | 56 funds | $21.6B |
| THERMO FISHER SCIENTIFIC INCTMO | 56 funds | $14.7B |
| DANAHER CORPDHR | 55 funds | $7.3B |
| META PLATFORMS INC-CLASS AMETA | 54 funds | $45.7B |
| UNITEDHEALTH GROUP INCUNH | 54 funds | $9.9B |
Ranked by how many of ATS's institutional holders also hold each name, a cross-fund conviction signal.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
| Class | 13F holders | Value held |
|---|---|---|
| ATSthis pageStock | 122 funds | $2.2B |
| 00217Y955EQUITY | 1 funds | $920K |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for ATS
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/ATS/capital-change-brief"
Use Arkolith's capital_change_brief for ATS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ATS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.