Anterix Inc.

ATEX

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

SEC filings (opens in a new tab)

In the last 90 days, Anterix Inc. insiders filed 0 open-market purchases and 10 sales; 171 institutions reported holding it in 13F filings for Q2 2026, worth $1.97B in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Anterix Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of ATEX: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Q4 2025	Change
Holders	111	117	+6
Shares	16.0M	16.2M	+213.1K (+1.3%)
Value	$341.2M	$353.3M	+$12.1M (+3.5%)

New holders (25)

Institutions that held Anterix Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to ATEX in Q4 2025
Institution	Shares	Value	% of portfolio
Jefferies Financial Group Inc.	454,508	$9.92M	0.08%
Potomac Capital Management, Inc.	161,400	$3.52M	2.95%
Beartown Capital Management, LLC	145,000	$3.17M	2.48%
Waterfront Wealth Inc.	48,627	$1.15M	0.22%
SG Americas Securities, LLC	48,509	$1.06M	0.00%
Arrowstreet Capital, Limited Partnership	33,401	$729.1K	0.00%
State of Wisconsin Investment Board	18,432	$402.4K	0.00%
XTX Topco Ltd	14,255	$311.2K	0.01%
IMC-Chicago, LLC	13,377	$292.0K	0.01%
Marble Bar Asset Management LLP	13,266	$289.6K	6.71%
Jefferson Bridge Capital, LLC	12,950	$282.7K	0.28%
Verition Fund Management LLC	12,600	$275.1K	0.00%
Caption Management, LLC	10,493	$229.1K	0.01%
Quantinno Capital Management LP	9,487	$207.1K	0.00%
Aquatic Capital Management LLC	8,675	$189.4K	0.01%
Toronto Dominion Bank	4,300	$93.9K	0.00%
Pinnacle Wealth Planning Services, Inc.	304	$6.64K	0.00%
Quarry LP	188	$4.10K	0.00%
Private Wealth Management Group, LLC	185	$4.04K	0.00%
Los Angeles Capital Management LLC	141	$2.76K	0.00%
Massmutual Trust Co FSB	37	$808	0.00%
UBS Asset Management Americas Inc	13	$284	0.00%
Trust Co	12	$262	0.00%
Global Retirement Partners, LLC	9	$196	0.00%
Transamerica Financial Advisors, Inc.	3	$65	0.00%

Sold out (19)

Institutions that held Anterix Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of ATEX in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Scoggin Management LP	225,000	$4.83M
Y-Intercept (Hong Kong) Ltd	31,400	$674.2K
Engineers Gate Manager LP	27,051	$580.8K
AQR Capital Management LLC	19,459	$417.8K
FourThought Financial Partners, LLC	14,406	$309.3K
NJ State Employees Deferred Compensation Plan	11,000	$236.2K
New Age Alpha Advisors, LLC	4,238	$91.0K
Quantbot Technologies LP	2,659	$57.1K
FNY Investment Advisers, LLC	1,500	$32.0K
Quadrant Capital Group LLC	1,185	$25.4K
Versant Capital Management, Inc	362	$7.77K
CIBC Private Wealth Group, LLC	226	$4.85K
Clearstead Advisors, LLC	103	$2.21K
Principal Securities, Inc.	29	$623
Fortitude Family Office, LLC	20	$429
True Wealth Design, LLC	8	$172
Rothschild Investment LLC	5	$107
Advisory Services Network, LLC	5	$107
SBI Securities Co., Ltd.	74,983	–