ATEX Anterix Inc.
Anterix Inc. (ATEX) Institutional Ownership
What the institutions did with ATEX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Owl Creek Asset Management, L.P. | 5.4M | 28.3% |
| T. Rowe Price Investment Management, Inc. | 2.3M | 12.3% |
| Heard Capital LLC | 1.7M | 9.0% |
| BlackRock, Inc. | 1.1M | 5.6% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 750.5K | 3.9% |
| Jupiter Topco LLC | 662.4K | 3.5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 553.0K | 2.9% |
| PLUSTICK MANAGEMENT LLC | 520.0K | 2.7% |
| STATE STREET CORP | 496.0K | 2.6% |
| GAMCO INVESTORS, INC. ET AL | 415.5K | 2.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 388.1K | 2.0% |
| QVT Financial LP | 383.9K | 2.0% |
| DIMENSIONAL FUND ADVISORS LP | 371.0K | 1.9% |
| FMR LLC | 370.4K | 1.9% |
| GABELLI FUNDS LLC | 278.5K | 1.5% |
| Invesco Ltd. | 201.0K | 1.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 158.5K | 0.8% |
| GARNET EQUITY CAPITAL HOLDINGS, INC. | 156.1K | 0.8% |
| Potomac Capital Management, Inc. | 155.1K | 0.8% |
| Panoramic Capital, LLC | 154.4K | 0.8% |
| GOLDMAN SACHS GROUP INC | 139.3K | 0.7% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 139.3K | 0.7% |
| BANK OF AMERICA CORP /DE/ | 134.7K | 0.7% |
| NORTHERN TRUST CORP | 123.2K | 0.6% |
| VANGUARD FIDUCIARY TRUST CO | 121.0K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | New | 0 | 2.3M | +2.3M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 8.0K | 750.5K | +742.5K |
| JANE STREET GROUP, LLC | Reduced | 420.9K | 17.5K | -403.4K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 307.9K | 30.3K | -277.6K |
| FMR LLC | Increased | 135.3K | 370.4K | +235.1K |
| Invesco Ltd. | New | 0 | 201.0K | +201.0K |
| AYAL Capital Advisors Ltd | Sold Out | 197.1K | 0 | -197.1K |
| GARNET EQUITY CAPITAL HOLDINGS, INC. | Reduced | 343.5K | 156.1K | -187.4K |
| Potrero Capital Research LLC | Reduced | 229.6K | 46.5K | -183.0K |
| DG Capital Management, LLC | Sold Out | 168.2K | 0 | -168.2K |
| CITADEL ADVISORS LLC | Reduced | 161.2K | 9.0K | -152.1K |
| HRT FINANCIAL LP | Reduced | 174.9K | 30.7K | -144.3K |
| CenterBook Partners LP | Reduced | 127.7K | 6.9K | -120.8K |
| QVT Financial LP | Reduced | 503.9K | 383.9K | -120.0K |
| ARDSLEY ADVISORY PARTNERS LP | Sold Out | 110.0K | 0 | -110.0K |
| STATE STREET CORP | Increased | 387.9K | 496.0K | +108.0K |
| GRATIA CAPITAL, LLC | Sold Out | 87.5K | 0 | -87.5K |
| D. E. Shaw & Co., Inc. | Increased | 5.7K | 93.0K | +87.3K |
| Atom Investors LP | Reduced | 84.2K | 4.1K | -80.1K |
| Granahan Investment Management, LLC | New | 0 | 72.1K | +72.1K |
| BlackRock, Inc. | Increased | 1.0M | 1.1M | +68.0K |
| CITIGROUP INC | Reduced | 119.9K | 60.0K | -59.9K |
| Squarepoint Ops LLC | Sold Out | 59.7K | 0 | -59.7K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 424.9K | 371.0K | -53.9K |
| TD Asset Management Inc | New | 0 | 53.3K | +53.3K |
| Informed Momentum Co LLC | New | 0 | 52.5K | +52.5K |
| Resolute Capital Asset Partners LLC | Sold Out | 51.1K | 0 | -51.1K |
| Waterfront Wealth Inc. | Reduced | 60.0K | 10.7K | -49.2K |
| SIMPLEX TRADING, LLC | Reduced | 43.8K | 5.4K | -38.4K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 39.8K | 5.6K | -34.2K |
| BANK OF AMERICA CORP /DE/ | Reduced | 167.8K | 134.7K | -33.1K |
| GILDER GAGNON HOWE & CO LLC | New | 0 | 32.8K | +32.8K |
| WELLINGTON MANAGEMENT GROUP LLP | New | 0 | 31.0K | +31.0K |
| IMC-Chicago, LLC | Reduced | 30.4K | 2.9K | -27.4K |
| Beartown Capital Management, LLC | Reduced | 100.0K | 75.0K | -25.0K |
| EVR Research LP | New | 0 | 25.0K | +25.0K |
| UBS Group AG | Reduced | 47.9K | 24.0K | -23.9K |
| Schonfeld Strategic Advisors LLC | Sold Out | 23.2K | 0 | -23.2K |
| GOLDMAN SACHS GROUP INC | Reduced | 161.8K | 139.3K | -22.5K |
| MORGAN STANLEY | Reduced | 102.7K | 80.4K | -22.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 573.8K | 553.0K | -20.8K |
| HARBOR CAPITAL ADVISORS, INC. | New | 0 | 20.8K | +20.8K |
| PLUSTICK MANAGEMENT LLC | Increased | 499.6K | 520.0K | +20.4K |
| 683 Capital Management, LLC | Increased | 46.0K | 66.0K | +20.0K |
| Apis Capital Advisors, LLC | Sold Out | 19.7K | 0 | -19.7K |
| Panoramic Capital, LLC | Increased | 135.0K | 154.4K | +19.4K |
| Campbell & CO Investment Adviser LLC | Reduced | 40.5K | 21.1K | -19.4K |
| Potomac Capital Management, Inc. | Reduced | 173.8K | 155.1K | -18.7K |
| HANSEATIC MANAGEMENT SERVICES INC | New | 0 | 18.4K | +18.4K |
| Virtu Financial LLC | Sold Out | 17.9K | 0 | -17.9K |
| Caption Management, LLC | New | 0 | 17.5K | +17.5K |
| Proficio Capital Partners LLC | Reduced | 20.0K | 3.0K | -17.0K |
| Marble Bar Asset Management LLP | Increased | 53.5K | 68.2K | +14.7K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 374.3K | 388.1K | +13.8K |
| CAXTON ASSOCIATES LLP | New | 0 | 13.4K | +13.4K |
| Trexquant Investment LP | Increased | 40.2K | 53.4K | +13.2K |
| Nuveen, LLC | Increased | 22.9K | 35.8K | +12.9K |
| GABELLI FUNDS LLC | Increased | 265.8K | 278.5K | +12.7K |
| LPL Financial LLC | New | 0 | 12.4K | +12.4K |
| JPMORGAN CHASE & CO | Increased | 5.1K | 16.5K | +11.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.