ANTERIX INC (ATEX) Institutional Ownership Changes & 13F Activity
ANTERIX INC (ATEX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include T. Rowe Price Investment Management, Inc., Price T Rowe Associates Inc, Jane Street Group, Llc, Millennium Management Llc, and Invesco Ltd..
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +3,123 | — | 3,123 | $321.48K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Sell | -152,149 | -94.4% | 9,014 | $927.90K | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Sell | -451 | -74.1% | 158 | $16.27K | Q2 2026 | Aug 24, 2026 |
| Mercer Global Advisors Inc | Buy | +2,716 | — | 2,716 | $279.58K | Q2 2026 | Aug 19, 2026 |
| Proficio Capital Partners Llc | Sell | -17,000 | -85.0% | 3,000 | $308.82K | Q2 2026 | Aug 17, 2026 |
| T. Rowe Price Investment Management, Inc. | Buy | +2,348,019 | — | 2,348,019 | $241.71M | Q2 2026 | Aug 14, 2026 |
| Price T Rowe Associates Inc | Buy | +742,496 | +9333.7% | 750,451 | $77.25M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Sell | -403,351 | -95.8% | 17,506 | $1.80M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -277,582 | -90.1% | 30,340 | $3.12M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +200,975 | — | 200,975 | $20.69M | Q2 2026 | Aug 14, 2026 |
| Garnet Equity Capital Holdings, Inc. | Sell | -187,377 | -54.5% | 156,119 | $16.07M | Q2 2026 | Aug 14, 2026 |
| Potrero Capital Research Llc | Sell | -183,036 | -79.7% | 46,525 | $4.79M | Q2 2026 | Aug 14, 2026 |
| Hrt Financial Lp | Sell | -144,252 | -82.5% | 30,673 | $3.16M | Q2 2026 | Aug 14, 2026 |
| Qvt Financial Lp | Sell | -120,000 | -23.8% | 383,941 | $39.52M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +87,294 | +1532.5% | 92,990 | $9.57M | Q2 2026 | Aug 14, 2026 |
| Atom Investors Lp | Sell | -80,055 | -95.1% | 4,124 | $424.52K | Q2 2026 | Aug 14, 2026 |
| Granahan Investment Management, Llc | Buy | +72,121 | — | 72,121 | $7.42M | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Sell | -34,214 | -86.0% | 5,584 | $574.82K | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Sell | -33,095 | -19.7% | 134,686 | $13.86M | Q2 2026 | Aug 14, 2026 |
| Gilder Gagnon Howe & Co Llc | Buy | +32,833 | — | 32,833 | $3.38M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Buy | +31,006 | — | 31,006 | $3.19M | Q2 2026 | Aug 14, 2026 |
| Beartown Capital Management, Llc | Sell | -25,000 | -25.0% | 75,000 | $7.72M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Sell | -22,452 | -13.9% | 139,334 | $14.34M | Q2 2026 | Aug 14, 2026 |
| Plustick Management Llc | Buy | +20,404 | +4.1% | 520,000 | $53.53M | Q2 2026 | Aug 14, 2026 |
| 683 Capital Management, Llc | Buy | +20,000 | +43.5% | 66,000 | $6.79M | Q2 2026 | Aug 14, 2026 |
| Panoramic Capital, Llc | Buy | +19,377 | +14.4% | 154,377 | $15.89M | Q2 2026 | Aug 14, 2026 |
| Potomac Capital Management, Inc. | Sell | -18,731 | -10.8% | 155,071 | $15.96M | Q2 2026 | Aug 14, 2026 |
| Caption Management, Llc | Buy | +17,532 | — | 17,532 | $1.80M | Q2 2026 | Aug 14, 2026 |
| Marble Bar Asset Management Llp | Buy | +14,739 | +27.5% | 68,248 | $7.03M | Q2 2026 | Aug 14, 2026 |
| Caxton Associates Llp | Buy | +13,432 | — | 13,432 | $1.38M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about ATEX activity
Which institutional owners are buying ATEX?
Institutional owners buying ATEX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ATEX activity?
"Buy" means an investor increased their reported position in ATEX compared to the prior reporting period. This reflects growing exposure to ANTERIX INC (ATEX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ATEX increasing?
Institutional interest in ATEX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related ATEX Institutional Insights
- ATEX Overview
- ATEX 13F Institutional Holders
- ATEX Top Institutional Shareholders
- Communication Services Sector Institutional Ownership
- Communication Services Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Communication Services Stocks By Institutional Investors
- Most Sold Communication Services Stocks By Institutional Investors
- ATEX Insider Trading & SEC Form 4 Activity
- ATEX Articles
- Top Institutional Investor Stock Rankings