Among active 13F managers last quarter, 24 opened and 17 added, while 9 reduced; the largest holder to move was Marshall Wace, LLP (+189%). Over the last 180 days, 1 insider bought and none sold, a net +$322K in open-market trades.
Funds lean in and no leg opposes.
110 tracked 13F filers disclose a position in ALTO as of the latest SEC 13F filings, a combined $200.9M 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. | 5.5M | $31.3M | ▲+323% Added · +4.2M sh | Q2 2026 | |
| 2 | Marshall Wace, LLP | 3.3M | $16.2M | ▲+189% Added · +2.2M sh | Q1 2026 | |
| 3 | Vanguard Capital Management LLC | 3.2M | $18.3M | ▲+1.0% Added · +32K sh | Q2 2026 | |
| 4 | Two Sigma Investments, LP | 2.0M | $9.7M | ▲+139% Added · +1.2M sh | Q1 2026 | |
| 5 | Geode Capital Management, LLC | 2.0M | $11.3M | ▲+122% Added · +1.1M sh | Q2 2026 | |
| 6 | Millennium Management LLC | 1.9M | $9.3M | ▲+419% Added · +1.5M sh | Q1 2026 | |
| 7 | Arrowstreet Capital, Limited Partnership | 1.8M | $8.7M | ▲+68% Added · +724K sh | Q1 2026 | |
| 8 | Renaissance Technologies LLC | 1.7M | $8.1M | ▲+9.8% Added · +150K sh | Q1 2026 | |
| 9 | Jane Street Group, LLC | 1.3M | $6.3M | ▲+65% Added · +507K sh | Q1 2026 | |
| 10 | State Street Corp | 1.2M | $7.0M | ▲+230% Added · +857K sh | Q2 2026 | |
| 11 | Susquehanna International Group, LLP | 1.1M | $5.3M | ▲+3.3% Added · +34K sh | Q1 2026 | |
| 12 | Hillsdale Investment Management Inc. | 1.0M | $4.8M | ▲+590% Added · +856K sh | Q1 2026 | |
| 13 | Qube Research & Technologies Ltd | 970K | $4.7M | ▲+123% Added · +535K sh | Q1 2026 | |
| 14 | Connor, Clark & Lunn Investment Management Ltd. | 856K | $4.9M | ▲+122% Added · +471K sh | Q2 2026 | |
| 15 | Jacobs Levy Equity Management, Inc | 827K | $4.7M | ▲+333% Added · +637K sh | Q2 2026 | |
| 16 | Dimensional Fund Advisors LP | 659K | $3.2M | ▲+75% Added · +282K sh | Q1 2026 | |
| 17 | Creative Financial Designs Inc | 615K | $3.5M | ▼−20% Reduced · −155K sh | Q2 2026 | |
| 18 | Goldman Sachs Group Inc | 602K | $2.9M | ▼−16% Reduced · −114K sh | Q1 2026 | |
| 19 | Panagora Asset Management Inc | 584K | $3.3M | ▲New +584K sh | Q2 2026 | |
| 20 | Bank Of America Corp | 550K | $2.7M | ▲15× Added · +515K sh | Q1 2026 | |
| 21 | Bridgeway Capital Management, LLC | 520K | $3.0M | ▲+6.6% Added · +32K sh | Q2 2026 | |
| 22 | Vanguard Fiduciary Trust Co | 508K | $2.9M | ▲+7.1% Added · +34K sh | Q2 2026 | |
| 23 | Vanguard Portfolio Management LLC | 497K | $2.8M | ▲New +497K sh | Q2 2026 | |
| 24 | Algert Global LLC | 477K | $2.7M | ▲+295% Added · +356K sh | Q2 2026 | |
| 25 | Empowered Funds, LLC | 411K | $2.0M | ▲New +411K 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, 24 funds opened a new position in ALTO and 17 added to an existing one, while 9 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 |
|---|---|---|
| Nvidia CorpNVDA | 58 funds | $120.9B |
| Amazon.com IncAMZN | 57 funds | $55.3B |
| Apple IncAAPL | 56 funds | $84.7B |
| Microsoft CorpMSFT | 56 funds | $66.5B |
| Alphabet Inc-CL AGOOGL | 56 funds | $60.0B |
| Meta Platforms Inc-Class AMETA | 56 funds | $29.9B |
| Micron Technology IncMU | 56 funds | $26.0B |
| Broadcom IncAVGO | 55 funds | $51.5B |
| Costco Wholesale CorpCOST | 55 funds | $8.4B |
| Advanced Micro DevicesAMD | 54 funds | $26.6B |
| Tesla IncTSLA | 54 funds | $20.0B |
| Mastercard Inc - AMA | 54 funds | $19.2B |
Ranked by how many of ALTO's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in ALTO.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 11, 2026 | Nathan Gilbert E | Director | Buy (P) | 50K | $208K |
| May 13, 2026 | Nathan Gilbert E | Director | Buy (P) | 5K | $22K |
| May 12, 2026 | Nathan Gilbert E | Director | Buy (P) | 20K | $92K |
| Aug 13, 2025 | Sneed James R | Chief Commercial Officer | Buy (P) | 3K | $3K |
| Nov 13, 2024 | Nathan Gilbert E | Director | Buy (P) 2 lots, same day | 30K | $40K |
| Nov 12, 2024 | Olander Robert R. | Chief Financial Officer | Buy (P) | 7K | $10K |
| Nov 12, 2024 | McGregor Bryon T | President & CEO, Director | Buy (P) | 37K | $50K |
| Jun 1, 2023 | Nathan Gilbert E | Director | Buy (P) | 5K | $10K |
| May 31, 2023 | Nathan Gilbert E | Director | Buy (P) | 5K | $10K |
| Mar 17, 2023 | Nathan Gilbert E | Director | Buy (P) | 10K | $17K |
| Mar 16, 2023 | Nathan Gilbert E | Director | Buy (P) | 10K | $18K |
| Mar 16, 2023 | Graham Auste M | Gen. Counsel, VP & Secy | Buy (P) | 3K | $5K |
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 | 40 | 17 | – |
Insiders Form 4 open-market | 1 | 0 | +$322K |
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 ALTO
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/ALTO/capital-change-brief"
Use Arkolith's capital_change_brief for ALTO. 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 ALTO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.