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Livermore
ZHEN

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 10 sales; 171 institutions reported holding it in 13F filings for Q2 2026, worth $1.97B in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Anterix Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of ATEX: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders1173132+18
Shares16.2M951.3K16.9M+1.70M (+11.2%)
Value$353.3M$20.8M$646.5M+$313.9M (+94.4%)

3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (38)

Institutions that held Anterix Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to ATEX in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Capital Management LLC573,847$21.9M0.00%
Plustick Management LLC499,596$19.1M9.21%
Potrero Capital Research LLC229,561$8.77M5.38%
Vanguard Portfolio Management LLC164,542$6.28M0.00%
Panoramic Capital, LLC135,000$5.16M3.62%
CenterBook Partners LP127,674$4.88M0.26%
Vanguard Fiduciary Trust Co119,456$4.56M0.00%
Ardsley Advisory Partners LP110,000$4.20M0.64%
Gratia Capital, LLC87,500$3.34M3.16%
OpenArc Corporate Advisory, LLC73,848$2.82M0.04%
Resolute Capital Asset Partners LLC51,106$1.95M1.03%
683 Capital Management, LLC46,000$1.76M0.16%
Apis Capital Advisors, LLC19,740$753.9K0.12%
Virtu Financial LLC17,885$683.0K0.03%
GWN Securities Inc.16,468$628.9K0.12%
Quadrature Capital Ltd14,502$553.8K0.01%
CWM Advisors, LLC13,309$508.3K0.03%
FNY Investment Advisers, LLC11,221$428.0K0.19%
AQR Capital Management LLC11,100$423.9K0.00%
J. Goldman & Co LP9,033$345.0K0.02%
ExodusPoint Capital Management, LP8,794$335.8K0.00%
Quantbot Technologies LP8,619$329.2K0.01%
Price T Rowe Associates Inc7,955$304.0K0.00%
Gem Investment Advisors, LLC7,183$274.3K0.27%
Vanguard Global Advisers, LLC6,966$266.0K0.00%
American Century Companies Inc6,661$254.4K0.00%
Prudential Financial Inc6,457$246.6K0.00%
Skopos Labs, Inc.5,284$201.8K0.01%
Crewe Advisors LLC3,000$114.6K0.01%
Fifth Third Bancorp1,685$64.3K0.00%
IFP Advisors, Inc1,078$41.2K0.00%
RWM Asset Management, LLC775$29.6K0.00%
Caitong International Asset Management Co., Ltd568$21.7K0.00%
Versant Capital Management, Inc405$15.5K0.00%
Root Financial Partners, LLC47$1.79K0.00%
North Star Investment Management Corp.22$8400.00%
MAI Capital Management20$7640.00%
Sunbelt Securities, Inc.3$1150.00%

Sold out (20)

Institutions that held Anterix Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of ATEX in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Jefferies Financial Group Inc.454,508$9.92M
Marshall Wace, LLP291,255$6.36M
Tudor Investment Corp Et Al124,943$2.73M
Qube Research & Technologies Ltd124,646$2.72M
Man Group plc100,145$2.19M
Gsa Capital Partners LLP72,976$1.59M
SG Americas Securities, LLC48,509$1.06M
Arrowstreet Capital, Limited Partnership33,401$729.1K
Gabelli & Co Investment Advisers, Inc.30,650$669.1K
Balyasny Asset Management LLC17,740$387.3K
EntryPoint Capital, LLC15,012$327.7K
XTX Topco Ltd14,255$311.2K
Verition Fund Management LLC12,600$275.1K
Caption Management, LLC10,493$229.1K
Quest Partners LLC8,802$192.1K
Aquatic Capital Management LLC8,675$189.4K
Group One Trading, L.P.6,175$134.8K
Amalgamated Bank354$8.00K
Quarry LP188$4.10K
SRS Capital Advisors, Inc.89$1.94K

Not filed for Q1 2026 yet (3)

Institutions that held Anterix Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATEX in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc931,305$20.3M
Sandia Investment Management LP20,000$436.6K
Global Retirement Partners, LLC9$196