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ATEX · Anterix Inc.

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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV+4.49% 13F +693CRM+2.92% 13F +1,018CVNA-0.98% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+4.91% 13F +1,203CRWD+5.68% 13F +1,382ANET+1.22% 13F +1,323COIN+10.14% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV+4.49% 13F +693CRM+2.92% 13F +1,018CVNA-0.98% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+4.91% 13F +1,203CRWD+5.68% 13F +1,382ANET+1.22% 13F +1,323COIN+10.14% 13F +475

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ATEX

Name: Anterix Inc. (ATEX) insider trading and ownership data
Creator: WaveMan
License: https://wave-man.com/terms

Anterix Inc.

TELECOM · TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE) · CIK 0001304492

FORM 144 · 3☆ WATCH

INSIDER NET · 180D

-$30.7M

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

105

13F, latest reported quarter

REVENUE GROWTH

+7.8%

XBRL, annual

NET MARGIN

1394.2%

CONVERSIONS · 180D

codes C/M, not in net · $12.3M priced

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

net -$30.7M over 180 days

-$30.7M over 90 days

below 87% of Telecom

CONGRESS

no member of Congress has reported trading it

FUNDS

105 funds added or opened last quarter

below 53% of Telecom

REVENUE

+7.8% year over year

more than 68% of Telecom

MARGIN

1394.2% net margin

the highest in Telecom

BUYBACKS

$990.0K repurchased, FY to 2026-03-31

below 93% of Telecom

SHORT

8.5% of shares outstanding short · 5.0 days to cover · settled 2026-07-31

more than 85% of Telecom

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

Insiders are net sellers: -$30.7M across 8 people in 180 days.

105 funds added or opened positions in the latest 13F quarter, of 174 holders.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +280.5%

+280.5%12M

INSIDER BUYINSIDER SELLFORM 144

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

Insiders have filed to sell — before selling.

The record shows a net $30.7M sold by insiders over 180 days, 105 funds added last quarter, $6.2M in planned Form 144 sales. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

TMUS ROKU CXDO NXST CCOI SHEN SPOK GSAT MDIA SPIR TSQ SSP

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, Anterix Inc. insiders sold a net $30.7M of stock across 108 Form 4 purchases and sales, with 0 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-05.

INSIDER

FILED

VALUE

Guttman-McCabe Christopher

Chief Reg & Comm Officer

SELL

2026-08-25

5,372.0

$502.7K

Guttman-McCabe Christopher

Chief Reg & Comm Officer

SELL

2026-08-25

7,791.0

$722.8K

Guttman-McCabe Christopher

Chief Reg & Comm Officer

SELL

2026-08-25

7,580.0

$695.0K

Guttman-McCabe Christopher

Chief Reg & Comm Officer

SELL

2026-08-25

2,696.0

$244.3K

Kuhn Thomas R.

Director

SELL

2026-08-24

4,392.0

$387.3K

108 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 103 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

Owl Creek Asset Management, L.P.

5,411,776.0 sh

$557.1M

Heard Capital LLC

1,716,738.0 sh

$176.7M

BlackRock, Inc.

1,075,115.0 sh

$110.7M

Jupiter Topco LLC

662,415.0 sh

$68.2M

VANGUARD CAPITAL MANAGEMENT LLC

553,002.0 sh

$56.9M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

Planned sales · Form 144

Filed before the sale — intent, not a trade

CHRISTOPHER GUTTMAN-MCCABE

FILED 2026-08-25

$2.2M

THOMAS KUHN

FILED 2026-08-24

$888.5K

SCOTT LANG

FILED 2026-08-14

$3.2M

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Gabelli Global Content & Connectivity Fund

$2.7M POSITION · AS OF 2026-03-31

3.6%

Keeley Small Cap Fund

$1.5M POSITION · AS OF 2026-03-31

1.8%

TETON Westwood Mighty Mites Fund

$2.0M POSITION · AS OF 2026-03-31

1.1%

Kirr, Marbach Partners Value Fund

$1.1M POSITION · AS OF 2026-03-31

1.1%

State Street(R) SPDR(R) S&P(R) Telecom ETF

$3.8M POSITION · AS OF 2026-03-31

0.9%

Select Wireless Portfolio

$2.7M POSITION · AS OF 2026-02-28

0.9%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2026-03	2025-03	2024-03	2023-03
REVENUE	$6.5M	$6.0M	$4.2M	$1.9M
OPERATING INCOME	$93.9M	$-11.7M	$-10.1M	$-16.5M
NET INCOME	$90.6M	$-11.4M	$-9.1K	$-16.3M
EPS (DILUTED)	4.83	-0.61	-0.49	-0.87
OPERATING CASH FLOW	$5.5M	$-29.3M	$42.0M	$-27.2M
CASH	$98.5M	$47.4M	$60.6M	$43.2M
BUYBACKS	$990.0K	$8.4M	$24.7M	$8.2M

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-05 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE