Anterix (ATEX)
Anterix on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as telephone communications (no radiotelephone).
1.7M
Short interest
settlement 2026-10-15
6.1
Days to cover
+0.5 days vs prior
76.1%
Short share of volume
2026-10-28
689
Fails to deliver
settlement 2026-09-30
Wed 11 Nov
Next earnings
estimated date
-$14.1M
Insider flow, 90 days
0 buys, 26 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in ATEX is 1,659,977 shares, up 12,312 shares over the last month. Over the last 48 readings it ranged from 616,332 shares (29 November 2024) to 2,023,406 shares (15 July 2026). At the reported average volume of 273K shares a day that is 6.1 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 1,659,977 | +0.3% | 273,049 | 6.08 |
| 2026-09-30 | 1,655,766 | +0.5% | 295,772 | 5.60 |
| 2026-09-15 | 1,647,665 | +2.0% | 303,405 | 5.43 |
| 2026-08-31 | 1,615,968 | -11.0% | 298,220 | 5.42 |
| 2026-08-14 | 1,814,817 | +8.3% | 386,335 | 4.70 |
| 2026-07-31 | 1,675,040 | -17.2% | 335,759 | 4.99 |
| 2026-07-15 | 2,023,406 | +20.2% | 432,836 | 4.67 |
| 2026-06-30 | 1,682,807 | -3.8% | 616,238 | 2.73 |
| 2026-06-15 | 1,749,067 | +10.1% | 564,749 | 3.10 |
| 2026-05-29 | 1,589,075 | -4.3% | 394,324 | 4.03 |
| 2026-05-15 | 1,660,332 | +6.3% | 321,907 | 5.16 |
| 2026-04-30 | 1,561,220 | +1.2% | 349,920 | 4.46 |
| 2026-04-15 | 1,542,541 | -2.9% | 307,882 | 5.01 |
| 2026-03-31 | 1,587,737 | +3.8% | 276,470 | 5.74 |
| 2026-03-13 | 1,530,247 | -4.5% | 298,663 | 5.12 |
| 2026-02-27 | 1,603,040 | +10.1% | 567,584 | 2.82 |
| 2026-02-13 | 1,455,603 | +4.2% | 483,900 | 3.01 |
| 2026-01-30 | 1,397,221 | +14.0% | 401,853 | 3.48 |
| 2026-01-15 | 1,225,669 | +8.4% | 203,836 | 6.01 |
| 2025-12-31 | 1,130,654 | +1.5% | 204,118 | 5.54 |
| 2025-12-15 | 1,113,996 | +0.1% | 220,314 | 5.06 |
| 2025-11-28 | 1,112,743 | -0.1% | 225,495 | 4.93 |
| 2025-11-14 | 1,113,706 | +9.8% | 266,056 | 4.19 |
| 2025-10-31 | 1,014,012 | +6.2% | 163,217 | 6.21 |
| 2025-10-15 | 954,726 | +7.4% | 200,563 | 4.76 |
| 2025-09-30 | 889,005 | -6.0% | 262,045 | 3.39 |
| 2025-09-15 | 945,553 | -0.0% | 170,795 | 5.54 |
| 2025-08-29 | 945,804 | -12.1% | 241,732 | 3.91 |
| 2025-08-15 | 1,075,592 | +10.7% | 204,931 | 5.25 |
| 2025-07-31 | 971,487 | -2.7% | 184,389 | 5.27 |
| 2025-07-15 | 998,781 | +5.2% | 179,813 | 5.55 |
| 2025-06-30 | 949,389 | +12.3% | 267,353 | 3.55 |
| 2025-06-13 | 845,677 | +4.2% | 121,242 | 6.98 |
| 2025-05-30 | 811,404 | +3.7% | 112,669 | 7.20 |
| 2025-05-15 | 782,315 | -0.2% | 103,202 | 7.58 |
| 2025-04-30 | 783,749 | -3.3% | 123,240 | 6.36 |
| 2025-04-15 | 810,470 | -1.2% | 153,034 | 5.30 |
| 2025-03-31 | 820,150 | -2.0% | 158,304 | 5.18 |
| 2025-03-14 | 836,546 | +11.1% | 177,793 | 4.71 |
| 2025-02-28 | 752,761 | -5.6% | 231,964 | 3.25 |
| 2025-02-14 | 797,788 | +5.5% | 245,840 | 3.25 |
| 2025-01-31 | 756,245 | +3.4% | 168,941 | 4.48 |
| 2025-01-15 | 731,640 | +8.5% | 94,267 | 7.76 |
| 2024-12-31 | 674,255 | +4.9% | 90,354 | 7.46 |
| 2024-12-13 | 642,669 | +4.3% | 88,570 | 7.26 |
| 2024-11-29 | 616,332 | -11.0% | 150,570 | 4.09 |
| 2024-11-15 | 692,684 | -3.7% | 117,433 | 5.90 |
| 2024-10-31 | 719,350 | -7.2% | 97,443 | 7.38 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of ATEX volume is 76.1%, up 10.4 points over the last five sessions. Over the last 30 readings it ranged from 48.3% (21 September 2026) to 76.1% (28 October 2026). The latest reading sits at the top of that range. The latest reading is 14.0 points above the 30-session average of 62.2%, on 93K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 71K | 93K | 76.1% | 0 |
| 2026-10-27 | 48K | 74K | 65.3% | 40 |
| 2026-10-26 | 62K | 90K | 68.2% | 2 |
| 2026-10-23 | 68K | 107K | 63.2% | 1,600 |
| 2026-10-22 | 74K | 150K | 49.2% | 1,077 |
| 2026-10-21 | 44K | 67K | 65.8% | 0 |
| 2026-10-20 | 34K | 52K | 65.3% | 0 |
| 2026-10-19 | 61K | 96K | 64.1% | 0 |
| 2026-10-16 | 70K | 96K | 73.0% | 0 |
| 2026-10-15 | 80K | 113K | 71.0% | 0 |
| 2026-10-14 | 78K | 114K | 68.9% | 0 |
| 2026-10-13 | 69K | 113K | 61.2% | 0 |
| 2026-10-12 | 91K | 137K | 66.5% | 284 |
| 2026-10-09 | 93K | 143K | 65.1% | 1,288 |
| 2026-10-08 | 47K | 69K | 68.4% | 0 |
| 2026-10-07 | 33K | 58K | 56.6% | 0 |
| 2026-10-06 | 50K | 99K | 50.6% | 108 |
| 2026-10-05 | 37K | 55K | 66.0% | 0 |
| 2026-10-02 | 51K | 84K | 60.2% | 0 |
| 2026-10-01 | 61K | 108K | 56.1% | 0 |
| 2026-09-30 | 39K | 80K | 48.8% | 0 |
| 2026-09-29 | 46K | 71K | 64.9% | 0 |
| 2026-09-28 | 49K | 77K | 63.4% | 0 |
| 2026-09-25 | 35K | 67K | 52.4% | 0 |
| 2026-09-24 | 43K | 75K | 57.3% | 0 |
| 2026-09-23 | 31K | 50K | 61.2% | 0 |
| 2026-09-22 | 54K | 85K | 63.5% | 0 |
| 2026-09-21 | 70K | 144K | 48.3% | 0 |
| 2026-09-18 | 44K | 69K | 64.5% | 1 |
| 2026-09-17 | 45K | 75K | 60.1% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 30 September 2026, the fails-to-deliver balance in ATEX is 689 shares, up 42 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (8 July 2026) to 17,131 shares (24 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-30 | 689 | $79.04 | $54K |
| 2026-09-21 | 647 | $76.99 | $50K |
| 2026-09-17 | 1,324 | $76.22 | $101K |
| 2026-09-11 | 394 | $82.79 | $33K |
| 2026-09-09 | 1,864 | $85.44 | $159K |
| 2026-09-02 | 1 | $89.55 | $90 |
| 2026-08-28 | 1,995 | $94.67 | $189K |
| 2026-08-27 | 98 | $94.16 | $9K |
| 2026-08-24 | 3,935 | $93.25 | $367K |
| 2026-08-20 | 357 | $88.68 | $32K |
| 2026-08-17 | 49 | $91.53 | $4K |
| 2026-08-14 | 385 | $91.49 | $35K |
| 2026-08-04 | 567 | $95.65 | $54K |
| 2026-07-29 | 1,463 | $91.37 | $134K |
| 2026-07-24 | 17,131 | $100.42 | $1.7M |
| 2026-07-23 | 17,115 | $103.99 | $1.8M |
| 2026-07-22 | 1,960 | $105.82 | $207K |
| 2026-07-16 | 23 | $105.34 | $2K |
| 2026-07-08 | 1 | $100.90 | $101 |
| 2026-07-07 | 1,773 | $106.04 | $188K |
| 2026-07-06 | 1,955 | $105.14 | $206K |
| 2026-07-01 | 20 | $102.94 | $2K |
| 2026-06-30 | 7,667 | $98.24 | $753K |
| 2026-06-29 | 19 | $89.67 | $2K |
| 2026-06-26 | 97 | $81.00 | $8K |
| 2026-06-18 | 1,147 | $79.16 | $91K |
| 2026-06-16 | 20 | $83.01 | $2K |
| 2026-06-15 | 580 | $82.50 | $48K |
| 2026-06-12 | 433 | $81.44 | $35K |
| 2026-06-10 | 42 | $64.55 | $3K |
Insider trades
SEC Form 4, newest first. JSONInsiders at ATEX reported 26 open-market sells worth $14.1M in the last 90 days and no open-market buys. Latest filing: Marquez Elena (Chief Financial Officer) on 2026-10-09.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Sell | 210 | $81.90 | $17K | 13K |
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Sell | 1K | $80.22 | $82K | 13K |
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Exercise or conversion | 1K | $40.00 | $49K | 14K |
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Sell | 100 | $82.50 | $8K | 13K |
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Sell | 400 | $81.80 | $33K | 13K |
| 2026-10-09 | Marquez Elena | Chief Financial Officer | Sell | 3K | $80.16 | $261K | 13K |
| 2026-10-05 | Marquez Elena | Chief Financial Officer | Tax withholding | 473 | $84.33 | $40K | 16K |
| 2026-09-29 | Marquez Elena | Chief Financial Officer | Tax withholding | 1K | $81.75 | $108K | 17K |
| 2026-09-21 | Lang Scott A. | President and CEO | Sell | 15K | $80.00 | $1.2M | 26K |
| 2026-09-10 | Martin Heather | Chief Marketing Officer | Sell | 8K | $84.20 | $679K | 27K |
| 2026-09-10 | DANIELS LESLIE B | Director | Sell | 3K | $83.83 | $210K | 43K |
| 2026-09-09 | Martin Heather | Chief Marketing Officer | Tax withholding | 3K | $85.44 | $296K | 35K |
| 2026-09-08 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sell | 4K | $85.44 | $347K | 5K |
| 2026-09-08 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sell | 293 | $85.44 | $25K | 9K |
| 2026-09-04 | DANIELS LESLIE B | Director | Sell | 1K | $86.50 | $104K | 46K |
| 2026-09-04 | DANIELS LESLIE B | Director | Sell | 3K | $87.31 | $253K | 47K |
| 2026-09-03 | DANIELS LESLIE B | Director | Sell | 6K | $87.15 | $523K | 50K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 3K | $90.61 | $244K | 45K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 8K | $91.69 | $695K | 48K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 8K | $92.77 | $723K | 55K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 5K | $93.59 | $503K | 63K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Tax withholding | 17K | $90.38 | $1.5M | 68K |
| 2026-08-25 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 40K | $34.72 | $1.4M | 85K |
| 2026-08-24 | Kuhn Thomas R. | Director, Executive Chairman | Sell | 400 | $91.01 | $36K | 18K |
| 2026-08-24 | Kuhn Thomas R. | Director, Executive Chairman | Sell | 790 | $90.00 | $71K | 18K |
| 2026-08-24 | Kuhn Thomas R. | Director, Executive Chairman | Sell | 4K | $89.12 | $394K | 19K |
| 2026-08-24 | Kuhn Thomas R. | Director, Executive Chairman | Sell | 4K | $88.18 | $387K | 23K |
| 2026-08-24 | Kuhn Thomas R. | Director, Executive Chairman | Exercise or conversion | 10K | $33.62 | $336K | 28K |
| 2026-08-19 | Heard William | Director | Gift | 5K | $0.00 | $0 | 4K |
| 2026-08-14 | Heard William | Director | Sell | 46K | $90.11 | $4.2M | 1.7M |
| 2026-08-14 | Lang Scott A. | President and CEO | Sell | 5K | $88.96 | $478K | 41K |
| 2026-08-14 | Lang Scott A. | President and CEO | Sell | 19K | $90.16 | $1.7M | 47K |
| 2026-08-14 | Lang Scott A. | President and CEO | Sell | 10K | $90.87 | $917K | 66K |
| 2026-08-14 | Lang Scott A. | President and CEO | Sell | 800 | $91.69 | $73K | 76K |
| 2026-08-04 | Fleischhauer Mark | Director | Grant | 2K | $0.00 | $0 | 14K |
| 2026-08-04 | Heard William | Director | Grant | 2K | $0.00 | $0 | 11K |
| 2026-08-04 | YAZDI MAHVASH | Director | Grant | 2K | $0.00 | $0 | 21K |
| 2026-08-04 | DANIELS LESLIE B | Director | Grant | 2K | $0.00 | $0 | 56K |
| 2026-08-04 | ALTMAN JEFFREY A | Director, 10% owner | Grant | 2K | $0.00 | $0 | 17K |
| 2026-07-13 | Marquez Elena | Chief Financial Officer | Tax withholding | 231 | $100.96 | $23K | 18K |
| 2026-07-13 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Tax withholding | 2K | $100.96 | $153K | 76K |
| 2026-06-18 | Kuhn Thomas R. | Director, Executive Chairman | Sell | 2K | $79.52 | $132K | 18K |
| 2026-06-18 | Lang Scott A. | President and CEO | Sell | 170 | $80.25 | $14K | 77K |
| 2026-06-17 | Marquez Elena | Chief Financial Officer | Sell | 4K | $79.50 | $341K | 18K |
| 2026-06-17 | Marquez Elena | Chief Financial Officer | Exercise or conversion | 1K | $40.00 | $49K | 23K |
| 2026-06-16 | YAZDI MAHVASH | Director | Sell | 7K | $80.00 | $560K | 19K |
| 2026-06-15 | Fleischhauer Mark | Director | Sell | 4K | $79.83 | $279K | 13K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 13K | $84.29 | $1.1M | 78K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 16K | $83.72 | $1.4M | 91K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 26K | $82.27 | $2.2M | 108K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sell | 35K | $81.32 | $2.9M | 134K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 26K | $49.39 | $1.3M | 169K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 7K | $42.14 | $283K | 144K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 20K | $37.42 | $748K | 137K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 51K | $34.40 | $1.8M | 117K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 8K | $32.50 | $260K | 66K |
| 2026-06-15 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Exercise or conversion | 12K | $25.75 | $303K | 58K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sell | 4K | $82.14 | $356K | 10K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sell | 13K | $81.04 | $1.1M | 14K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 11K | $82.50 | $907K | 27K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 5K | $82.50 | $385K | 38K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Exercise or conversion | 18K | $49.39 | $907K | 43K |
| 2026-06-15 | Ashe Gena L | Chief Legal Officer & Corp Sec | Exercise or conversion | 11K | $34.96 | $385K | 25K |
| 2026-06-15 | Lang Scott A. | President and CEO | Tax withholding | 48K | $82.50 | $4.0M | 77K |
| 2026-06-15 | Lang Scott A. | President and CEO | Tax withholding | 40K | $82.50 | $3.3M | 125K |
| 2026-06-15 | Lang Scott A. | President and CEO | Exercise or conversion | 75K | $34.96 | $2.6M | 165K |
| 2026-06-15 | Lang Scott A. | President and CEO | Exercise or conversion | 64K | $30.99 | $2.0M | 90K |
| 2026-05-22 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 3K | $60.00 | $150K | 14K |
| 2026-05-20 | Kuhn Thomas R. | Director, Executive Chairman | Grant | 3K | price not stated in the filing | not stated | 19K |
| 2026-05-20 | Martin Heather | Chief Marketing Officer | Grant | 4K | $0.00 | $0 | 38K |
| 2026-05-20 | Marquez Elena | Chief Financial Officer | Grant | 4K | $0.00 | $0 | 21K |
| 2026-05-20 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Grant | 5K | $0.00 | $0 | 46K |
| 2026-05-20 | Ashe Gena L | Chief Legal Officer & Corp Sec | Grant | 4K | $0.00 | $0 | 16K |
| 2026-05-20 | Lang Scott A. | President and CEO | Grant | 18K | $0.00 | $0 | 26K |
| 2026-05-18 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Tax withholding | 1K | $57.06 | $81K | 41K |
| 2026-05-18 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 1K | $57.06 | $59K | 12K |
| 2026-05-15 | Marquez Elena | Chief Financial Officer | Tax withholding | 271 | $56.62 | $15K | 18K |
| 2026-03-03 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 12K | $36.18 | $450K | 13K |
| 2026-03-03 | Ashe Gena L | Chief Legal Officer & Corp Sec | Exercise or conversion | 12K | $27.83 | $346K | 26K |
| 2025-12-29 | Heard William | Director | Gift | 2K | $0.00 | $0 | 9K |
| 2025-12-18 | Lang Scott A. | President and CEO | Buy | 1K | $21.61 | $25K | 8K |
| 2025-12-08 | Lang Scott A. | President and CEO | Buy | 2K | $20.41 | $50K | 7K |
| 2025-11-18 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sell | 7K | $21.07 | $138K | 13K |
| 2025-10-04 | Marquez Elena | Chief Financial Officer | Tax withholding | 404 | $22.55 | $9K | 18K |
| 2025-09-29 | Marquez Elena | Chief Financial Officer | Grant | 11K | $0.00 | $0 | 18K |
| 2025-09-18 | Lang Scott A. | President and CEO | Buy | 5K | $21.28 | $99K | 5K |
| 2025-08-19 | Gray Timothy | Chief Financial Officer | Buy | 50 | $22.07 | $1K | 77K |
| 2025-08-05 | Owl Creek Asset Management, L.P. | TenPercentOwner | Grant | 8K | $0.00 | $0 | 15K |
| 2025-08-05 | Heard William | Director | Grant | 8K | $0.00 | $0 | 10K |
| 2025-08-05 | YAZDI MAHVASH | Director | Grant | 8K | $0.00 | $0 | 26K |
| 2025-08-05 | DANIELS LESLIE B | Director | Grant | 8K | $0.00 | $0 | 54K |
| 2025-08-05 | Fleischhauer Mark | Director | Grant | 8K | $0.00 | $0 | 16K |
| 2025-08-05 | ALTMAN JEFFREY A | Director, 10% owner | Grant | 8K | $0.00 | $0 | 15K |
| 2025-07-12 | Gerbrandt Ryan | Chief Operating Officer | Tax withholding | 1K | $23.95 | $35K | 42K |
| 2025-07-12 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Tax withholding | 2K | $23.95 | $36K | 43K |
| 2025-06-12 | Kuhn Thomas R. | Director, Executive Chairman | Grant | 6K | $0.00 | $0 | 17K |
| 2025-05-22 | Gray Timothy | Chief Financial Officer | Tax withholding | 4K | $28.35 | $116K | 77K |
| 2025-05-22 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 3K | $28.35 | $77K | 20K |
| 2025-05-16 | Ashe Gena L | Chief Legal Officer & Corp Sec | Tax withholding | 1K | $28.42 | $31K | 23K |
| 2025-05-16 | Gerbrandt Ryan | Chief Operating Officer | Tax withholding | 1K | $28.42 | $39K | 44K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON17 Form 144 notices on file for ATEX worth $25.8M at the prices reported; 7 in the last 90 days worth $8.9M. Latest: ELENA MARQUEZ filed on 2026-10-09 to sell 4,981 shares ($401K) from 2026-10-09.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-09 | ELENA MARQUEZOfficer | 5K | $401K | 0.025% | 2026-10-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-21 | SCOTT LANGOfficer, Director | 15K | $1.2M | 0.076% | 2026-09-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-10 | HEATHER MARTINOfficer | 8K | $679K | 0.041% | 2026-09-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-08 | GENA L ASHEOfficer | 4K | $372K | 0.022% | 2026-09-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-25 | CHRISTOPHER GUTTMAN-MCCABEOfficer | 23K | $2.2M | 0.120% | 2026-08-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-24 | THOMAS KUHNDirector | 10K | $889K | 0.051% | 2026-08-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-14 | SCOTT LANGOfficer, Director | 35K | $3.2M | 0.179% | 2026-08-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-17 | ELENA MARQUEZOfficer | 4K | $341K | 0.023% | 2026-06-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | YAZDI MAHVASHDirector | 7K | $560K | 0.037% | 2026-06-16 | Charles Schwab Corp |
| 2026-06-15 | CHRISTOPHER GUTTMAN-MCCABEOfficer | 123K | $10.0M | 0.656% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | GENA L ASHEOfficer | 18K | $1.4M | 0.095% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-17 | RYAN L GERBRANDTOfficer | 25K | $1.1M | 0.133% | 2026-04-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-04-16 | RYAN L GERBRANDTOfficer | 27K | $1.1M | 0.144% | 2026-04-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-03 | Gena L AsheOfficer | 12K | $450K | 0.066% | 2026-03-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-02 | RYAN L GERBRANDTOfficer | 23K | $838K | 0.121% | 2026-03-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-19 | RYAN L GERBRANDTOfficer | 29K | $976K | 0.152% | 2026-02-19 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-18 | Gena AsheOfficer | 7K | $139K | 0.035% | 2025-11-18 | Merrill Lynch |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON3 holders report 5% or more of ATEX in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Jeffrey A. Altman at 28.5% of the class (5,551,684 shares), filed 2026-07-08 for an event on 2026-06-25.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-27 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 914K | 4.7% | 2026-09-30 |
| 2026-07-08 | 13G | T. Rowe Price Investment Management, Inc.investment adviser | 2.3M | 12.0% | 2026-06-30 |
| 2026-07-08 | 13D/Ano. 8 | Jeffrey A. Altmanindividual | 5.6M | 28.5% | 2026-06-25 |
| 2026-07-08 | 13D/Ano. 8 | Owl Creek Asset Management, L.P.partnership | 5.4M | 27.7% | 2026-06-25 |
| 2026-01-30 | 13G/Ano. 2 | The Vanguard Groupinvestment adviser | 931K | 5.0% | 2025-12-31 |
| 2025-11-12 | 13G/Ano. 1 | DG Capital Management, LLCinvestment adviser | 745K | 4.0% | 2025-09-30 |
| 2025-11-12 | 13G/Ano. 1 | Dov Gertzulinparent holding company, individual | 745K | 4.0% | 2025-09-30 |
13F holders
Tracked managers holding ATEX at their latest 13F. JSON5 of the 30 tracked managers held ATEX at their latest 13F, $15.4M in total at quarter-end prices. D. E. Shaw & Co. is the largest at $9.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| D. E. Shaw & Co. | 2026-06-30 | 93K | $9.6M | 0.00% | +87K |
| Millennium Management | 2026-06-30 | 30K | $3.1M | 0.00% | -278K |
| AQR Capital Management | 2026-06-30 | 13K | $1.4M | 0.00% | +2K |
| Citadel Advisors | 2026-06-30 | 9K | $928K | 0.00% | -152K |
| Two Sigma Investments | 2026-06-30 | 4K | $383K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q1 FY 2027 (quarter ended 2026-06-30) Anterix reported revenue of $2.0M, up 38.1% from the same quarter a year earlier, and net income of $240K (0.01 diluted EPS). In FY 2026 it generated $5.5M of operating cash flow and spent $990K on buybacks.
- Cash
- $116.0M
- Equity
- $285.8M
- Total assets
- $497.9M
- Shares outstanding
- 19,609,786
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q1 FY 2027 | 2026-06-30 | $2.0M | $240K | 12.3% | 0.01 |
| Q4 FY 2026derived | 2026-03-31 | $2.0M | $18.5M | 945.9% | n/a |
| Q3 FY 2026 | 2025-12-31 | $1.6M | -$6.6M | -419.6% | -0.35 |
| Q2 FY 2026 | 2025-09-30 | $1.6M | $53.5M | 3449.5% | 2.86 |
| Q1 FY 2026 | 2025-06-30 | $1.4M | $25.2M | 1775.7% | 1.35 |
| Q4 FY 2025derived | 2025-03-31 | $1.4M | $9.2M | 662.9% | n/a |
| Q3 FY 2025 | 2024-12-31 | $1.6M | $7.7M | 492.3% | 0.41 |
| Q2 FY 2025 | 2024-09-30 | $1.6M | -$12.8M | -823.1% | -0.69 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2026 | 2026-03-31 | $6.5M | $90.6M | $5.5M | $31K | $990K | n/a |
| FY 2025 | 2025-03-31 | $6.0M | -$11.4M | -$29.3M | $87K | $8.4M | n/a |
| FY 2024 | 2024-03-31 | $4.2M | -$9K | $42.0M | $307K | $24.7M | n/a |
| FY 2023 | 2023-03-31 | $1.9M | -$16.3M | -$27.3M | $2.1M | $8.2M | n/a |
| FY 2022 | 2022-03-31 | $1.1M | -$37.5M | $17.9M | $1.1M | $15.0M | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-08-06 from the cover page.
What this page is
Anterix in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Anterix (ATEX), SEC CIK 1304492, listed on Nasdaq, classified by the SEC as telephone communications (no radiotelephone). The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-30.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-09.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-27.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-11.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-09.JSON and CSV
- Company record
- EDGAR filing index for CIK 1304492Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as telephone communications (no radiotelephone)
Other company pages
Datasets
Frequently Asked Questions
How much of ATEX is sold short?
1,659,977 shares were held short at the 2026-10-15 settlement, 6.1 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is ATEX's daily short volume?
On 2026-10-28, 70,606 of the 92,724 ATEX shares reported to FINRA were sold short, 76.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ATEX have fails to deliver?
The SEC's latest file shows 689 ATEX shares failed to deliver at settlement 2026-09-30. Fails are reported per settlement date and published twice a month with a lag.
Are ATEX insiders buying or selling?
Insiders at ATEX reported 26 open-market sells worth $14.1M in the last 90 days and no open-market buys. Latest filing: Marquez Elena (Chief Financial Officer) on 2026-10-09.
Have ATEX insiders filed to sell?
17 Form 144 notices on file for ATEX worth $25.8M at the prices reported; 7 in the last 90 days worth $8.9M. Latest: ELENA MARQUEZ filed on 2026-10-09 to sell 4,981 shares ($401K) from 2026-10-09.
Who owns 5% or more of ATEX?
3 holders report 5% or more of ATEX in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Jeffrey A. Altman at 28.5% of the class (5,551,684 shares), filed 2026-07-08 for an event on 2026-06-25.
What did ATEX report last quarter?
In Q1 FY 2027 (quarter ended 2026-06-30) Anterix reported revenue of $2.0M, up 38.1% from the same quarter a year earlier, and net income of $240K (0.01 diluted EPS). In FY 2026 it generated $5.5M of operating cash flow and spent $990K on buybacks.
Which tracked 13F managers own ATEX?
5 of the 30 tracked 13F managers held ATEX shares at their latest filing, $15.4M in all. The largest: D. E. Shaw & Co. (93K shares, $9.6M), Izzy Englander's Millennium Management (30K shares, $3.1M), Cliff Asness's AQR Capital Management (13K shares, $1.4M), Ken Griffin's Citadel Advisors (9K shares, $928K), Two Sigma Investments (4K shares, $383K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.