Among active 13F managers last quarter, 37 opened and none reduced or exited; the largest holder to move was Citadel Advisors LLC (new position). Over the last 180 days, 2 insiders bought and none sold, a net +$219.6M in open-market trades.
Funds lean in and no leg opposes.
55 tracked 13F filers disclose a position in MAIR as of the latest SEC 13F filings, a combined $581.9M 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 | Citadel Advisors LLC | 6.4M | $251.5M | ▲New +6.4M sh | Q2 2026 | |
| 2 | ExodusPoint Capital Management, LP | 1.3M | $51.8M | ▲New +1.3M sh | Q2 2026 | |
| 3 | D1 Capital Partners L.P. | 1.3M | $48.8M | ▲New +1.3M sh | Q2 2026 | |
| 4 | Schonfeld Strategic Advisors LLC | 1.0M | $39.1M | ▲New +1.0M sh | Q2 2026 | |
| 5 | Geode Capital Management, LLC | 954K | $37.2M | ▲New +954K sh | Q2 2026 | |
| 6 | Ghisallo Capital Management LLC | 800K | $31.2M | ▲New +800K sh | Q2 2026 | |
| 7 | Soros Fund Management LLC | 625K | $24.4M | ▲New +625K sh | Q2 2026 | |
| 8 | Robeco Schweiz AG | 611K | $23.8M | ▲New +611K sh | Q2 2026 | |
| 9 | Daiwa Securities Group Inc. | 401K | $15.6M | ▲New +401K sh | Q2 2026 | |
| 10 | Hood River Capital Management LLC | 237K | $9.2M | ▲New +237K sh | Q2 2026 | |
| 11 | Walleye Capital LLC | 231K | $9.0M | ▲New +231K sh | Q2 2026 | |
| 12 | Davidson Kempner Capital Management LP | 200K | $7.8M | ▲New +200K sh | Q2 2026 | |
| 13 | Weiss Asset Management LP | 170K | $6.6M | ▲New +170K sh | Q2 2026 | |
| 14 | Point72 Asset Management, L.P. | 150K | $5.8M | ▲New +150K sh | Q2 2026 | |
| 15 | Teacher Retirement System Of Texas | 100K | $3.9M | ▲New +100K sh | Q2 2026 | |
| 16 | Madison Asset Management, LLC | 82K | $3.2M | ▲New +82K sh | Q2 2026 | |
| 17 | Pinnbrook Capital Management LP | 81K | $3.1M | ▲New +81K sh | Q2 2026 | |
| 18 | Renaissance Capital LLC | 45K | $1.8M | ▲New +45K sh | Q2 2026 | |
| 19 | Engineers Gate Manager LP | 39K | $1.5M | ▲New +39K sh | Q2 2026 | |
| 20 | Lisanti Capital Growth, LLC | 35K | $1.4M | ▲New +35K sh | Q2 2026 | |
| 21 | Vestmark Advisory Solutions, Inc. | 25K | $967K | ▲New +25K sh | Q2 2026 | |
| 22 | Blair William & Co | 16K | $638K | ▲New +16K sh | Q2 2026 | |
| 23 | Diametric Capital, LP | 15K | $597K | ▲New +15K sh | Q2 2026 | |
| 24 | Rothschild Investment LLC | 12K | $482K | ▲New +12K sh | Q2 2026 | |
| 25 | MML Investors Services, LLC | 12K | $471K | ▲New +12K sh | Q2 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, 37 funds opened a new position in MAIR, while none reduced or exited. 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 |
|---|---|---|
| Eli Lilly & CoLLY | 28 funds | $719.7M |
| Nvidia CorpNVDA | 27 funds | $4.1B |
| Amazon.com IncAMZN | 27 funds | $2.8B |
| Bloom Energy Corp- ABE | 26 funds | $736.3M |
| Schwab (Charles) CorpSCHW | 26 funds | $406.4M |
| Oracle CorpORCL | 26 funds | $250.7M |
| Howmet Aerospace IncHWM | 26 funds | $209.5M |
| Micron Technology IncMU | 25 funds | $2.1B |
| Microsoft CorpMSFT | 25 funds | $2.0B |
| Cisco Systems IncCSCO | 25 funds | $399.6M |
| Chevron CorpCVX | 25 funds | $366.5M |
| Salesforce IncCRM | 25 funds | $179.6M |
Ranked by how many of MAIR's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MAIR.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 25, 2026 | Bertarelli Ernesto | 10% Owner | Buy (P) | 8.8M | $219.0M |
| Aug 25, 2026 | La Force Andrew Hudson III | Director | Buy (P) | 20K | $557K |
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 | 0 | 0 | – |
Insiders Form 4 open-market | 2 | 0 | +$219.6M |
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 MAIR
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/MAIR/capital-change-brief"
Use Arkolith's capital_change_brief for MAIR. 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 MAIR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.