Among active 13F managers last quarter, 14 opened and 13 added, while 16 reduced; the largest holder to move was Van Eck Associates Corp (−3.2%). Over the last 180 days, 1 insider sold and 1 insider bought, a net -$41K in open-market trades.
The legs disagree, or only one of them leans.
147 tracked 13F filers disclose a position in MUX as of the latest SEC 13F filings, a combined $645.3M 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.7M | $86.1M | ▲+144% Added · +2.8M sh | Q2 2026 | |
| 2 | State Street Corp | 4.3M | $77.1M | ▲+26% Added · +891K sh | Q2 2026 | |
| 3 | Mirae Asset Global Etfs Holdings Ltd. | 2.1M | $43.6M | ▼−3.2% Reduced · −70K sh | Q1 2026 | |
| 4 | Van Eck Associates Corp | 1.5M | $27.5M | ▼−3.2% Reduced · −50K sh | Q2 2026 | |
| 5 | Tidal Investments LLC | 1.5M | $26.8M | ▲+8.7% Added · +118K sh | Q2 2026 | |
| 6 | Geode Capital Management, LLC | 1.4M | $26.0M | ▲+138% Added · +832K sh | Q2 2026 | |
| 7 | Two Sigma Investments, LP | 1.3M | $26.6M | ▲+81% Added · +582K sh | Q1 2026 | |
| 8 | Dimensional Fund Advisors LP | 1.3M | $25.9M | ▲+16% Added · +173K sh | Q1 2026 | |
| 9 | BNP Paribas Financial Markets | 1.1M | $22.2M | ▲+8.8% Added · +88K sh | Q1 2026 | |
| 10 | UBS Group AG | 1.1M | $22.0M | ▼−22% Reduced · −311K sh | Q1 2026 | |
| 11 | Morgan Stanley | 847K | $17.3M | ▼−13% Reduced · −131K sh | Q1 2026 | |
| 12 | Synergy Asset Management, LLC | 803K | $14.6M | ▲+32% Added · +193K sh | Q2 2026 | |
| 13 | Mawer Investment Management Ltd. | 707K | $14.4M | ▲+183% Added · +457K sh | Q1 2026 | |
| 14 | Bank Of Montreal | 686K | $14.0M | ▲+895% Added · +617K sh | Q1 2026 | |
| 15 | Amundi | 675K | $13.8M | ▼−12% Reduced · −94K sh | Q1 2026 | |
| 16 | FMR LLC | 609K | $11.0M | ▼−20% Reduced · −148K sh | Q2 2026 | |
| 17 | Vanguard Capital Management LLC | 572K | $10.4M | ▲+2.9% Added · +16K sh | Q2 2026 | |
| 18 | Royal Bank Of Canada | 535K | $10.9M | ▼−6.8% Reduced · −39K sh | Q1 2026 | |
| 19 | Bank Of America Corp | 535K | $10.9M | ▲14× Added · +498K sh | Q1 2026 | |
| 20 | Vanguard Portfolio Management LLC | 505K | $9.1M | ▲+257% Added · +363K sh | Q2 2026 | |
| 21 | Marshall Wace, LLP | 471K | $9.6M | ▲+498% Added · +392K sh | Q1 2026 | |
| 22 | ALPS Advisors Inc | 443K | $8.0M | ▲+4.2% Added · +18K sh | Q2 2026 | |
| 23 | JPMorgan Chase & Co | 371K | $7.0M | ▼−17% Reduced · −73K sh | Q1 2026 | |
| 24 | Barclays PLC | 324K | $6.6M | ▲+124% Added · +179K sh | Q1 2026 | |
| 25 | Wells Fargo & Company | 323K | $6.6M | ▲79× Added · +319K 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, 14 funds opened a new position in MUX and 13 added to an existing one, while 16 reduced. 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 | Their position there |
|---|---|---|
| Microsoft CorpMSFT | 75 funds | $117.3B |
| Amazon.com IncAMZN | 73 funds | $92.3B |
| Nvidia CorpNVDA | 71 funds | $220.9B |
| Visa Inc-Class A SharesV | 71 funds | $28.4B |
| Berkshire Hathaway Inc-CL BBRK/B | 71 funds | $17.9B |
| Alphabet Inc-CL AGOOGL | 70 funds | $89.6B |
| Meta Platforms Inc-Class AMETA | 70 funds | $53.7B |
| JPMorgan Chase & CoJPM | 70 funds | $28.8B |
| Apple IncAAPL | 69 funds | $141.1B |
| Alphabet Inc-CL CGOOG | 69 funds | $59.9B |
| Eli Lilly & CoLLY | 68 funds | $42.7B |
| Advanced Micro DevicesAMD | 68 funds | $42.1B |
Ranked by how many of MUX's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MUX.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 29, 2026 | Brissenden Richard W. | Director | Sell (S) | 3K | $59K |
| Jun 5, 2026 | Kaszas Stephen Douglas | Director | Buy (P) | 1K | $18K |
| Sep 22, 2025 | Brissenden Richard W. | Director | Sell (S) 2 lots, same day | 11K | $167K |
| Sep 22, 2025 | Chan Jeffrey | VP - Finance | Sell (S) | 13K | $199K |
| Sep 19, 2025 | McEwen Robert Ross | Chairman and CEO, Director, 10% Owner | Sell (S) | 50K | $718K |
| Sep 19, 2025 | Spears Stephan Michael | VP Corporate Development | Sell (S) | 13K | $181K |
| Sep 19, 2025 | Diges Carmen L | General Counsel/Corp Sec | Sell (S) | 21K | $301K |
| Aug 12, 2025 | Ball Ian J | Director | Sell (S) | 3K | $28K |
| Dec 6, 2024 | Darveau-Garneau Nicolas | Director | Buy (P) | 2K | $19K |
| Jun 21, 2024 | Diges Carmen L | General Counsel/Corp Sec | Sell (S) | 17K | $161K |
| Jun 18, 2024 | Spears Stephan Michael | VP Corporate Development | Sell (S) | 3K | $25K |
| Jun 18, 2024 | Chan Jeffrey | VP - Finance | Sell (S) | 964 | $9K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 37 | 31 | – |
Insiders Form 4 open-market | 1 | 1 | -$41K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
| Class | 13F holders | Value held |
|---|---|---|
| MUXthis pageStock | 147 funds | $645.3M |
| MUX 5.25 08/15/30SDBCV | 6 funds | $211.2M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for MUX
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/MUX/capital-change-brief"
Use Arkolith's capital_change_brief for MUX. 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 MUX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.