Insider Transactions Reported by 21 Insiders of Anterix Inc.

Symbol: ATEX on Nasdaq
Location: Woodland Park, NJ

Quick Takeaways

ATEX - Anterix Inc. has 21 insiders with reported activity on this page.
Net insider value flow over the last year: +$36,824.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $175,128; sell value: $138,303.
Net share flow: +1,746.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$36,824.

Buys

$175,128

Shares: 8,310

Insiders: 2

Sells

$138,303

Shares: 6,564

Insiders: 1

Net

+$36,824

Shares: +1,746

Insiders: 1

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	0	$0	$0	$0
3-6	3,610	6,564	$75,072	$138,303	-$63,231
6-9	4,700	0	$100,056	$0	+$100,056
9-12	0	0	$0	$0	$0

Anterix Inc. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Jeffrey A. Altman	Director, 10%+ Owner	$130,035,519			Mixed	05 Aug 2025
William Heard	Director	$41,364,351			Mixed	05 Aug 2025
Robert Harris Schwartz	President and CEO, Director	$4,349,647			Mixed	23 Aug 2024
Timothy Gray	Chief Financial Officer	$1,699,875	+$1,104	+0.06%	Filing P/S	19 Aug 2025
Leslie B. Daniels	Director	$1,473,036			Mixed	05 Aug 2025
Elaine Gangeri	Chief Acc Officer, Treasurer	$1,245,598			Mixed	24 May 2021
Christopher Guttman-McCabe	Chief Reg & Comm Officer	$1,027,263			Mixed	12 Jul 2025
Ryan Gerbrandt	Chief Operating Officer	$1,014,569			Mixed	12 Jul 2025
Paul N. Saleh	Director	$821,708			Mixed	28 Aug 2023
Morgan E. Obrien	Executive Chairman, Director	$801,657			Filing P/S	16 Dec 2024
Heather Martin	Chief Marketing Officer, Chief of Staff	$742,389			Mixed	17 Sep 2025
Singleton B. Mcallister	Director	$734,150			Mixed	28 Aug 2023
Mahvash Yazdi	Director	$656,671			Mixed	05 Aug 2025
Greg Haller	Director	$591,902			Mixed	28 Aug 2023
Gregory A. Pratt	Director	$473,787			Mixed	28 Aug 2023
Thomas R. Kuhn	Director, Executive Chairman	$471,103			Mixed	12 Jun 2025
Elena Marquez	Chief Financial Officer	$406,553			Mixed	29 Sep 2025
Gena L. Ashe	Chief Legal Officer & Corp Sec	$391,222	-$138,303	-26%	Mixed	03 Mar 2026
Mark Fleischhauer	Director	$389,805			Mixed	05 Aug 2025
Hamid Akhavan	Director	$363,897			Mixed	17 Nov 2021
Scott A. Lang	President and CEO, Director	$178,498	+$174,024	+3890%	Filing P/S	18 Dec 2025

Top shareholders of Anterix Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Jeffrey A. Altman	3/4/5	Director, 10%+ Owner	29%	5,427,192	$130,035,519	—	05 Aug 2025	3/4/5
Owl Creek Asset Management, L.P.	13F	Company	29%	5,411,776	$118,139,070	—	31 Dec 2025	13F
Heard Capital LLC	13D/G 13F	Company	9.4%	1,741,989	$51,528,035	$0	28 Feb 2025	13D/G 13F
William Heard	3/4/5	Director	9.2%	1,726,392	$41,364,351	—	05 Aug 2025	3/4/5
BlackRock, Inc.	13D/G 13F	Company	5%	934,649	$35,694,245	-$618,411	31 Mar 2026	13D/G 13F
VANGUARD GROUP INC	13D/G 13F	The Vanguard Group · Company	5%	931,305	$20,330,854	$0	31 Dec 2025	13D/G 13F
DG Capital Management, LLC	13D/G 13F	Company	4%	744,544	$15,985,360	-$4,963,757	30 Sep 2025	13D/G 13F
QVT Financial LP	13F	Company	2.7%	503,941	$11,001,032	—	31 Dec 2025	13F
Jefferies Financial Group Inc.	13F	Company	2.4%	454,508	$9,921,910	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	2.3%	439,946	$9,604,021	—	31 Dec 2025	13F
GAMCO INVESTORS, INC. ET AL	13F	Company	2.3%	422,470	$9,222,520	—	31 Dec 2025	13F
GARNET EQUITY CAPITAL HOLDINGS, INC.	13F	Company	2.1%	397,395	$8,675,133	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.9%	360,139	$7,863,736	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	1.8%	333,788	$7,286,592	—	31 Dec 2025	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1.7%	324,923	$7,092,536	—	31 Dec 2025	13F
GABELLI FUNDS LLC	13F	Company	1.6%	304,907	$6,656,120	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	1.6%	291,255	$6,358,098	—	31 Dec 2025	13F
AYAL Capital Advisors Ltd	13F	Company	1.4%	265,000	$5,784,950	—	31 Dec 2025	13F
Robert Harris Schwartz	3/4/5	President and CEO, Director	— mixed-class rows	243,056 mixed-class rows	$4,349,647	—	23 Aug 2024	3/4/5
Potomac Capital Management, Inc.	13F	Company	0.86%	161,400	$3,523,362	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	0.85%	159,014	$3,471,275	—	31 Dec 2025	13F
Beartown Capital Management, LLC	13F	Company	0.77%	145,000	$3,165,350	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.76%	143,124	$3,124,397	—	31 Dec 2025	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.74%	138,677	$3,027,319	—	31 Dec 2025	13F
TUDOR INVESTMENT CORP ET AL	13F	Company	0.67%	124,943	$2,727,506	—	31 Dec 2025	13F
Qube Research & Technologies Ltd	13F	Company	0.66%	124,646	$2,721,022	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.66%	124,630	$2,720,673	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.61%	114,262	$2,494,339	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.58%	109,445	$2,389,185	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	0.58%	108,380	$2,365,935	—	31 Dec 2025	13F
KIRR MARBACH & CO LLC /IN/	13F	Company	0.54%	100,418	$2,192,125	—	31 Dec 2025	13F
Man Group plc	13F	Company	0.53%	100,145	$2,186,165	—	31 Dec 2025	13F
Atom Investors LP	13F	Company	0.44%	83,085	$1,813,746	—	31 Dec 2025	13F
Timothy Gray	3/4/5	Chief Financial Officer	— mixed-class rows	130,513 mixed-class rows	$1,699,875	+$1,104	19 Aug 2025	3/4/5
GSA CAPITAL PARTNERS LLP	13F	Company	0.39%	72,976	$1,593,000	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.37%	68,792	$1,501,729	—	31 Dec 2025	13F
Leslie B. Daniels	3/4/5	Director	0.33%	61,479	$1,473,036	—	05 Aug 2025	3/4/5
D. E. Shaw & Co., Inc.	13F	Company	0.33%	61,765	$1,348,330	—	31 Dec 2025	13F
Elaine Gangeri	3/4/5	Chief Acc Officer, Treasurer	— class O/S missing	36,646	$1,245,598	—	24 May 2021	3/4/5
Nuveen, LLC	13F	Company	0.28%	53,155	$1,160,374	—	31 Dec 2025	13F
Squarepoint Ops LLC	13F	Company	0.28%	53,117	$1,159,544	—	31 Dec 2025	13F
Teton Advisors, LLC	13F	Company	0.28%	53,000	$1,156,990	—	31 Dec 2025	13F
Waterfront Wealth Inc.	13F	Company	0.26%	48,627	$1,150,053	—	31 Dec 2025	13F
FMR LLC	13F	Company	0.27%	51,044	$1,114,298	—	31 Dec 2025	13F
Schonfeld Strategic Advisors LLC	13F	Company	0.26%	49,462	$1,079,755	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.26%	48,787	$1,065,020	—	31 Dec 2025	13F
SG Americas Securities, LLC	13F	Company	0.26%	48,509	$1,059,000	—	31 Dec 2025	13F
Christopher Guttman-McCabe	3/4/5	Chief Reg & Comm Officer	— mixed-class rows	96,383 mixed-class rows	$1,027,263	—	12 Jul 2025	3/4/5
Ryan Gerbrandt	3/4/5	Chief Operating Officer	— mixed-class rows	95,853 mixed-class rows	$1,014,569	—	12 Jul 2025	3/4/5
Trexquant Investment LP	13F	Company	0.25%	46,398	$1,012,868	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for Anterix Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Gena L. Ashe	ATEX	Common Stock	Tax liability	-48.2%			-12,427	13,366	03 Mar 2026	Direct
Gena L. Ashe	ATEX	Common Stock	Options Exercise	93%			12,427	25,793	03 Mar 2026	Direct
Gena L. Ashe	ATEX	Stock Option (Right to Buy)	Options Exercise	-33.3%			-12,427	24,848	03 Mar 2026	Direct
Scott A. Lang	ATEX	Common Stock	Purchase	16.3%	$25,068	$21.61	1,160	8,260	18 Dec 2025	Direct
Scott A. Lang	ATEX	Common Stock	Purchase	52.7%	$50,004	$20.41	2,450	7,100	08 Dec 2025	Direct
Gena L. Ashe	ATEX	Common Stock	Sale	-32.9%	$138,303	$21.07	-6,564	13,366	18 Nov 2025	Direct
Elena Marquez	ATEX	Common Stock	Tax liability	-2.19%			-404	18,029	04 Oct 2025	Direct
Elena Marquez	ATEX	Common Stock	Award	162.3%			11,405	18,433	29 Sep 2025	Direct
Scott A. Lang	ATEX	Common Stock	Purchase		$98,952	$21.28	4,650	4,650	18 Sep 2025	Direct
Timothy Gray	ATEX	Common Stock	Purchase	0.06%	$1,104	$22.07	50	77,022	19 Aug 2025	Direct
Jeffrey A. Altman	ATEX	Common Stock, par value $0.0001 per share ("Common Stock")	Award	101.5%			7,767	15,416	05 Aug 2025	Direct
William Heard	ATEX	Common Stock, par value $0.0001 per share ("Common Stock")	Award	411.6%			7,767	9,654	05 Aug 2025	Direct
Mahvash Yazdi	ATEX	Common Stock	Award	41.7%			7,767	26,407	05 Aug 2025	Direct
Leslie B. Daniels	ATEX	Common Stock	Award	16.6%			7,767	54,479	05 Aug 2025	Direct
Mark Fleischhauer	ATEX	Common Stock	Award	91.4%			7,767	16,269	05 Aug 2025	Direct
Ryan Gerbrandt	ATEX	Common Stock	Tax liability	-3.35%			-1,470	42,362	12 Jul 2025	Direct
Christopher Guttman-McCabe	ATEX	Common Stock	Tax liability	-3.42%			-1,517	42,892	12 Jul 2025	Direct
Thomas R. Kuhn	ATEX	Common Stock	Award	60%			6,222	16,594	12 Jun 2025	Direct
Gena L. Ashe	ATEX	Common Stock	Tax liability	-12.1%			-2,732	19,930	22 May 2025	Direct
Timothy Gray	ATEX	Common Stock	Tax liability	-5.05%			-4,098	76,972	22 May 2025	Direct
Scott A. Lang	ATEX	Stock Option (Right to Buy)	Award				223,546	223,546	21 May 2025	Direct
Christopher Guttman-McCabe	ATEX	Stock Option (Right to Buy)	Award				53,491	53,491	20 May 2025	Direct
Timothy Gray	ATEX	Stock Option (Right to Buy)	Award				53,491	53,491	20 May 2025	Direct
Ryan Gerbrandt	ATEX	Stock Option (Right to Buy)	Award				53,491	53,491	20 May 2025	Direct
Gena L. Ashe	ATEX	Stock Option (Right to Buy)	Award				53,491	53,491	20 May 2025	Direct
Christopher Guttman-McCabe	ATEX	Common Stock	Tax liability	-3.11%			-1,427	44,409	16 May 2025	Direct
Timothy Gray	ATEX	Common Stock	Tax liability	-1.35%			-1,112	81,070	16 May 2025	Direct
Ryan Gerbrandt	ATEX	Common Stock	Tax liability	-3.06%			-1,383	43,832	16 May 2025	Direct
Gena L. Ashe	ATEX	Common Stock	Tax liability	-4.63%			-1,101	22,662	16 May 2025	Direct
Christopher Guttman-McCabe	ATEX	Common Stock	Tax liability	-5.08%			-2,452	45,836	15 May 2025	Direct
Timothy Gray	ATEX	Common Stock	Tax liability	-2.74%			-2,316	82,182	15 May 2025	Direct
Ryan Gerbrandt	ATEX	Common Stock	Tax liability	-5.98%			-2,876	45,215	15 May 2025	Direct
Gena L. Ashe	ATEX	Common Stock	Tax liability	-8.89%			-2,320	23,763	15 May 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.