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Anterix Inc.

ATEX
Exchange
Nasdaq
Industry
Telephone Communications (No Radiotelephone)
SEC CIK
0001304492

In the last 90 days, Anterix Inc. insiders filed 0 open-market purchases and 11 sales; 174 institutions reported holding it in 13F filings for Q2 2026, worth $1.97B in total; no superinvestor holds it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
1.67M
Shares, settlement Oct 30, 2026
Change
+9.50K
+0.6% vs. Oct 15, 2026
Days to cover
6.45
Short interest ÷ average daily volume
Average daily volume
258.7K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 719,350 sharesNov 15, 2024: 692,684 sharesNov 29, 2024: 616,332 sharesDec 13, 2024: 642,669 sharesDec 31, 2024: 674,255 sharesJan 15, 2025: 731,640 sharesJan 31, 2025: 756,245 sharesFeb 14, 2025: 797,788 sharesFeb 28, 2025: 752,761 sharesMar 14, 2025: 836,546 sharesMar 31, 2025: 820,150 sharesApr 15, 2025: 810,470 sharesApr 30, 2025: 783,749 sharesMay 15, 2025: 782,315 sharesMay 30, 2025: 811,404 sharesJun 13, 2025: 845,677 sharesJun 30, 2025: 949,389 sharesJul 15, 2025: 998,781 sharesJul 31, 2025: 971,487 sharesAug 15, 2025: 1,075,592 sharesAug 29, 2025: 945,804 sharesSep 15, 2025: 945,553 sharesSep 30, 2025: 889,005 sharesOct 15, 2025: 954,726 sharesOct 31, 2025: 1,014,012 sharesNov 14, 2025: 1,113,706 sharesNov 28, 2025: 1,112,743 sharesDec 15, 2025: 1,113,996 sharesDec 31, 2025: 1,130,654 sharesJan 15, 2026: 1,225,669 sharesJan 30, 2026: 1,397,221 sharesFeb 13, 2026: 1,455,603 sharesFeb 27, 2026: 1,603,040 sharesMar 13, 2026: 1,530,247 sharesMar 31, 2026: 1,587,737 sharesApr 15, 2026: 1,542,541 sharesApr 30, 2026: 1,561,220 sharesMay 15, 2026: 1,660,332 sharesMay 29, 2026: 1,589,075 sharesJun 15, 2026: 1,749,067 sharesJun 30, 2026: 1,682,807 sharesJul 15, 2026: 2,023,406 sharesJul 31, 2026: 1,675,040 sharesAug 14, 2026: 1,814,817 sharesAug 31, 2026: 1,615,968 sharesSep 15, 2026: 1,647,665 sharesSep 30, 2026: 1,655,766 sharesOct 15, 2026: 1,659,977 sharesOct 30, 2026: 1,669,477 shares
Short interest in ATEX by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20261.67M+9.50K+0.6%258.7K6.45
Oct 15, 20261.66M+4.21K+0.3%273.0K6.08
Sep 30, 20261.66M+8.10K+0.5%295.8K5.60
Sep 15, 20261.65M+31.7K+2.0%303.4K5.43
Aug 31, 20261.62M−198.8K−11.0%298.2K5.42
Aug 14, 20261.81M+139.8K+8.3%386.3K4.70
Jul 31, 20261.68M−348.4K−17.2%335.8K4.99
Jul 15, 20262.02M+340.6K+20.2%432.8K4.67
Jun 30, 20261.68M−66.3K−3.8%616.2K2.73
Jun 15, 20261.75M+160.0K+10.1%564.7K3.10
May 29, 20261.59M−71.3K−4.3%394.3K4.03
May 15, 20261.66M+99.1K+6.4%321.9K5.16
Apr 30, 20261.56M+18.7K+1.2%349.9K4.46
Apr 15, 20261.54M−45.2K−2.9%307.9K5.01
Mar 31, 20261.59M+57.5K+3.8%276.5K5.74
Mar 13, 20261.53M−72.8K−4.5%298.7K5.12
Feb 27, 20261.60M+147.4K+10.1%567.6K2.82
Feb 13, 20261.46M+58.4K+4.2%483.9K3.01
Jan 30, 20261.40M+171.6K+14.0%401.9K3.48
Jan 15, 20261.23M+95.0K+8.4%203.8K6.01
Dec 31, 20251.13M+16.7K+1.5%204.1K5.54
Dec 15, 20251.11M+1.25K+0.1%220.3K5.06
Nov 28, 20251.11M−963−0.1%225.5K4.93
Nov 14, 20251.11M+99.7K+9.8%266.1K4.19
Oct 31, 20251.01M+59.3K+6.2%163.2K6.21
Oct 15, 2025954.7K+65.7K+7.4%200.6K4.76
Sep 30, 2025889.0K−56.5K−6.0%262.0K3.39
Sep 15, 2025945.6K−2510.0%170.8K5.54
Aug 29, 2025945.8K−129.8K−12.1%241.7K3.91
Aug 15, 20251.08M+104.1K+10.7%204.9K5.25
Jul 31, 2025971.5K−27.3K−2.7%184.4K5.27
Jul 15, 2025998.8K+49.4K+5.2%179.8K5.55
Jun 30, 2025949.4K+103.7K+12.3%267.4K3.55
Jun 13, 2025845.7K+34.3K+4.2%121.2K6.98
May 30, 2025811.4K+29.1K+3.7%112.7K7.20
May 15, 2025782.3K−1.43K−0.2%103.2K7.58
Apr 30, 2025783.7K−26.7K−3.3%123.2K6.36
Apr 15, 2025810.5K−9.68K−1.2%153.0K5.30
Mar 31, 2025820.1K−16.4K−2.0%158.3K5.18
Mar 14, 2025836.5K+83.8K+11.1%177.8K4.71
Feb 28, 2025752.8K−45.0K−5.6%232.0K3.25
Feb 14, 2025797.8K+41.5K+5.5%245.8K3.25
Jan 31, 2025756.2K+24.6K+3.4%168.9K4.48
Jan 15, 2025731.6K+57.4K+8.5%94.3K7.76
Dec 31, 2024674.3K+31.6K+4.9%90.4K7.46
Dec 13, 2024642.7K+26.3K+4.3%88.6K7.26
Nov 29, 2024616.3K−76.4K−11.0%150.6K4.09
Nov 15, 2024692.7K−26.7K−3.7%117.4K5.90
Oct 31, 2024719.4K−55.8K−7.2%97.4K7.38

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in ATEX by settlement date
Settlement dateSharesPriceValue
Sep 30, 2026689$79.04$54.5K
Sep 21, 2026647$76.99$49.8K
Sep 17, 20261,324$76.22$100.9K
Sep 11, 2026394$82.79$32.6K
Sep 9, 20261,864$85.44$159.3K
Sep 2, 20261$89.55$89.55
Aug 28, 20261,995$94.67$188.9K
Aug 27, 202698$94.16$9.23K
Aug 24, 20263,935$93.25$366.9K
Aug 20, 2026357$88.68$31.7K
Aug 17, 202649$91.53$4.48K
Aug 14, 2026385$91.49$35.2K
Aug 4, 2026567$95.65$54.2K
Jul 29, 20261,463$91.37$133.7K
Jul 24, 202617,131$100.42$1.72M
Jul 23, 202617,115$103.99$1.78M
Jul 22, 20261,960$105.82$207.4K
Jul 16, 202623$105.34$2.42K
Jul 8, 20261$100.90$100.9
Jul 7, 20261,773$106.04$188.0K
Jul 6, 20261,955$105.14$205.5K
Jul 1, 202620$102.94$2.06K
Jun 30, 20267,667$98.24$753.2K
Jun 29, 202619$89.67$1.70K
Jun 26, 202697$81.00$7.86K
Jun 18, 20261,147$79.16$90.8K
Jun 16, 202620$83.01$1.66K
Jun 15, 2026580$82.50$47.9K
Jun 12, 2026433$81.44$35.3K
Jun 10, 202642$64.55$2.71K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in ATEX by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202676,73640130,46558.8%
Nov 9, 202646,231093,33649.5%
Nov 6, 202631,95237272,41344.1%
Nov 5, 202657,670762130,19444.3%
Nov 4, 202643,372081,15753.4%
Nov 3, 202660,7240104,15358.3%
Nov 2, 202654,689082,26266.5%
Oct 30, 2026154,8310187,85482.4%
Oct 29, 202668,4694394,16372.7%
Oct 28, 202670,606092,72476.1%
Oct 27, 202647,9944073,50265.3%
Oct 26, 202661,702290,42968.2%
Oct 23, 202667,8021,600107,31063.2%
Oct 22, 202673,8351,077149,95949.2%
Oct 21, 202644,257067,30065.8%
Oct 20, 202633,707051,62765.3%
Oct 19, 202661,464095,89764.1%
Oct 16, 202669,923095,79173.0%
Oct 15, 202680,3900113,16671.0%
Oct 14, 202678,2230113,51968.9%
Oct 13, 202669,3690113,42461.2%
Oct 12, 202690,877284136,62866.5%
Oct 9, 202693,1361,288143,00365.1%
Oct 8, 202647,069068,78868.4%
Oct 7, 202632,598057,63756.6%
Oct 6, 202650,10810899,02950.6%
Oct 5, 202636,575055,39766.0%
Oct 2, 202650,536084,01260.2%
Oct 1, 202660,9090108,47756.1%
Sep 30, 202639,128080,16048.8%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in ATEX
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2271,21512,725228,2964,72654.3%
Sep 28, 2026T2308,76616,402134,2134,64869.7%
Sep 21, 2026T2273,02117,061252,6414,75651.9%
Sep 14, 2026T2346,77917,631368,1614,46248.5%
Sep 7, 2026T2381,19115,618143,3063,92772.7%
Aug 31, 2026T2300,73517,456208,0065,11159.1%
Aug 24, 2026T2372,24316,636249,5946,29259.9%
Aug 17, 2026T2396,44520,879226,3234,57763.7%
Aug 10, 2026T2632,42319,842486,6078,11356.5%
Aug 3, 2026T2365,49418,853222,1915,62862.2%
Jul 27, 2026T2377,89416,325284,4055,94957.1%
Jul 20, 2026T2376,99716,236287,5246,26756.7%