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Anterix ATEX

US equityMarket cap rank #2903
$85.61 +$1.28 (+1.52%)
Market closed · Oct 5, 10:20 pm ET · Last extended-hours $84.41 -1.40%
Open$84.89
Prev close$84.33
Day range$83.19 – $85.89
Volume189.7K
Market cap$1.68B
P/E (TTM)24.5
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership97.5%-0.48 pts vs. prior quarter
Institutions holding201+0 vs. prior quarter
Insider trades (recent)19 buys / 31 sellsNet selling
Short interest8.40% of floatDays to cover 5.4 · as of 15 Sep 2026
Short-sale volume share15.1%5-day average of daily volume

Short-sale volume as % of daily volume

10%14%18%23%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$1.41M (8 inflow days, 12 outflow days).

The five largest holders on file together own 60.9% of shares outstanding.

Largest holders

  • Owl Creek Asset Management, L.P.27.60%
  • T. Rowe Price Group, Inc.15.80%
  • Heard Capital LLC8.52%
  • BlackRock5.48%
  • GAMCO Investors, Inc.3.54%
  • Vanguard Capital Management, LLC3.44%
  • Janus Henderson Group plc3.38%
  • PlusTick Management LLC2.65%

By investor type

  • Mutual Fund57.53%
  • Hedge Fund36.36%
  • Individual/Insider2.29%
  • Public Company2.13%
  • Family Office/Trust0.75%
  • Private Company0.47%
  • Government Pension Fund0.21%
  • Insurance Company0.05%

Reported short interest has fallen from 8.63% to 8.40% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 1,647,665 8.4% 5.4
31 Aug 2026 1,615,968 8.2% 5.4
14 Aug 2026 1,814,817 9.3% 4.7
31 Jul 2026 1,675,040 8.6% 5.0
15 Jul 2026 2,023,406 10.4% 4.7
30 Jun 2026 1,682,807 8.6% 2.7

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