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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.

Q3 2025 vs. Q2 2025

How the institutions holding Anterix Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of ATEX: Q2 2025 compared with Q3 2025
MeasureQ2 2025Of which not filed for Q3 2025Q3 2025Change
Holders11211110
Shares16.8M50.0K16.0M−784.2K (−4.7%)
Value$431.0M$1.28M$341.2M−$88.5M (−20.6%)

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (26)

Institutions that held Anterix Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to ATEX in Q3 2025
InstitutionSharesValue% of portfolio
HRT Financial LP62,133$1.33M0.00%
Teton Advisors, LLC58,000$1.25M0.77%
Creative Planning43,694$938.1K0.00%
Jane Street Group, LLC42,283$907.8K0.00%
Atom Investors LP27,988$600.9K0.05%
Proficio Capital Partners LLC27,340$587.0K0.04%
Sandia Investment Management LP27,340$587.0K1.75%
AQR Capital Management LLC19,459$417.8K0.00%
EntryPoint Capital, LLC19,225$412.8K0.16%
FourThought Financial Partners, LLC14,406$309.3K0.03%
Simplex Trading, LLC2,968$63.0K0.00%
Quantbot Technologies LP2,659$57.1K0.00%
Quadrant Capital Group LLC1,185$25.4K0.00%
SRS Capital Advisors, Inc.383$8.22K0.00%
CIBC Private Wealth Group, LLC226$4.85K0.00%
Optiver Holding B.V.124$2.66K0.00%
Clearstead Advisors, LLC103$2.21K0.00%
The PNC Financial Services Group, Inc.33$7090.00%
Principal Securities, Inc.29$6230.00%
Ronald Blue Trust, Inc.27$5800.00%
Fortitude Family Office, LLC20$4290.00%
Hughes Financial Services, LLC23$4170.00%
GAMMA Investing LLC9$1930.00%
True Wealth Design, LLC8$1720.00%
Rothschild Investment LLC5$1070.00%
Advisory Services Network, LLC5$1070.00%

Sold out (26)

Institutions that held Anterix Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Not filed for Q3 2025 yet (1)

Institutions that held Anterix Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATEX in Q2 2025 that haven't filed for Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Teton Advisors, Inc.50,000$1.28M