Among active 13F managers last quarter, 12 opened and 22 added, while 11 reduced; the largest holder to move was Marex Group Ltd (−4.3%). Over the last 180 days, 4 insiders sold and none bought, a net -$3.5M in open-market trades.
The legs disagree, or only one of them leans.
365 tracked 13F filers disclose a position in MARA as of the latest SEC 13F filings, a combined $3.1B 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. | 64.1M | $890.3M | ▲+7.2% Added · +4.3M sh | Q2 2026 | |
| 2 | Vanguard Portfolio Management LLC | 27.4M | $380.6M | ▲+3.6% Added · +961K sh | Q2 2026 | |
| 3 | Vanguard Capital Management LLC | 16.5M | $229.8M | ▲+1.2% Added · +192K sh | Q2 2026 | |
| 4 | State Street Corp | 15.9M | $220.9M | ▲+4.5% Added · +682K sh | Q2 2026 | |
| 5 | Geode Capital Management, LLC | 10.9M | $188.0M | ▲+5.4% Added · +558K sh | Q2 2026 | |
| 6 | Marex Group Ltd | 8.0M | $110.5M | ▼−4.3% Reduced · −362K sh | Q2 2026 | |
| 7 | UBS Group AG | 7.6M | $62.2M | ▼−21% Reduced · −2.0M sh | Q1 2026 | |
| 8 | Goldman Sachs Group Inc | 6.0M | $49.2M | ▲+61% Added · +2.3M sh | Q1 2026 | |
| 9 | Morgan Stanley | 5.2M | $42.6M | ▼−18% Reduced · −1.1M sh | Q1 2026 | |
| 10 | Bank Of America Corp | 5.1M | $41.5M | ▲+49% Added · +1.7M sh | Q1 2026 | |
| 11 | JPMorgan Chase & Co | 4.7M | $36.4M | ▲+171% Added · +2.9M sh | Q1 2026 | |
| 12 | Norges Bank | 4.4M | $39.5M | ▲+16% Added · +619K sh | Q4 2025 | |
| 13 | Charles Schwab Investment Management Inc | 4.1M | $33.5M | ▼−6.5% Reduced · −287K sh | Q1 2026 | |
| 14 | Van Eck Associates Corp | 3.5M | $48.3M | ▼−0.2% Reduced · −8K sh | Q2 2026 | |
| 15 | Northern Trust Corp | 3.3M | $27.3M | ▲+7.1% Added · +222K sh | Q1 2026 | |
| 16 | Segall Bryant & Hamill, LLC | 2.8M | $38.3M | ▲New +2.8M sh | Q2 2026 | |
| 17 | Clear Street Group Inc. | 2.7M | $36.9M | ▲+13% Added · +304K sh | Q2 2026 | |
| 18 | Vanguard Fiduciary Trust Co | 2.5M | $35.0M | ▲+3.9% Added · +95K sh | Q2 2026 | |
| 19 | Bank of New York Mellon Corp | 2.5M | $20.1M | ▼−1.9% Reduced · −49K sh | Q1 2026 | |
| 20 | Quadrature Capital Ltd | 2.4M | $33.2M | ▲104× Added · +2.4M sh | Q2 2026 | |
| 21 | Susquehanna International Group, LLP | 2.1M | $17.3M | ▲+396% Added · +1.7M sh | Q1 2026 | |
| 22 | Principal Financial Group Inc | 1.8M | $15.0M | ▲+2.0% Added · +36K sh | Q1 2026 | |
| 23 | Public Sector Pension Investment Board | 1.8M | $25.2M | ▲+34% Added · +462K sh | Q2 2026 | |
| 24 | Vident Advisory, LLC | 1.8M | $25.0M | ▲+17% Added · +258K sh | Q2 2026 | |
| 25 | Mirae Asset Global Etfs Holdings Ltd. | 1.8M | $14.6M | ▼−6.2% Reduced · −119K 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, 12 funds opened a new position in MARA and 22 added to an existing one, while 11 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 | 208 funds | $214.2B |
| Nvidia CorpNVDA | 206 funds | $359.4B |
| Amazon.com IncAMZN | 205 funds | $167.3B |
| Apple IncAAPL | 201 funds | $248.5B |
| Alphabet Inc-CL AGOOGL | 201 funds | $145.2B |
| Meta Platforms Inc-Class AMETA | 201 funds | $93.7B |
| Walmart IncWMT | 200 funds | $29.9B |
| Broadcom IncAVGO | 199 funds | $144.0B |
| JPMorgan Chase & CoJPM | 197 funds | $51.7B |
| Visa Inc-Class A SharesV | 197 funds | $49.2B |
| Chevron CorpCVX | 197 funds | $24.0B |
| Alphabet Inc-CL CGOOG | 196 funds | $111.3B |
Ranked by how many of MARA's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MARA.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 21, 2026 | Nowaid Zabi | General Counsel | Sell (S) | 8K | $101K |
| Aug 17, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Sell (S) | 28K | $253K |
| Aug 17, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $147K |
| Jul 20, 2026 | Nowaid Zabi | General Counsel | Sell (S) | 8K | $101K |
| Jul 17, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $174K |
| Jul 17, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Sell (S) | 28K | $300K |
| Jun 22, 2026 | Mellinger Douglas K | Director | Sell (S) | 7K | $112K |
| Jun 17, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Sell (S) | 28K | $392K |
| Jun 17, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $228K |
| Jun 17, 2026 | Nowaid Zabi | General Counsel | Sell (S) | 7K | $100K |
| May 18, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $192K |
| May 18, 2026 | Nowaid Zabi | General Counsel | Sell (S) | 8K | $99K |
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 | 56 | 28 | – |
Insiders Form 4 open-market | 0 | 4 | -$3.5M |
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.
Connected entities for MARA
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/MARA/capital-change-brief"
Use Arkolith's capital_change_brief for MARA. 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 MARA. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.