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ATEX · Anterix Inc.

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$85.31 -3.37 (-3.80%) At close · Aug 20
Market Cap
$1.78B
Shares
19.61M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 173
Total Value: $2,025,009,323
Total Shares: 19,671,745

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 173 13F filers · Δ vs Mar 31, 2026
Top Holder
27.5%
Sep 2023 → Jun 2026 · range 27.5% – 36.8%
−2.8 pts
Top 5
57.5%
Sep 2023 → Jun 2026 · range 51.7% – 67.9%
+5.8 pts
Top 10
70.9%
Sep 2023 → Jun 2026 · range 64.0% – 81.0%
+6.9 pts
HHI
1,085
Sep 2023 → Jun 2026 · range 1,085 – 1,667
Broadly held−48

Quarterly Activity

vs Mar 31, 2026
New
60
Increased
45
Decreased
47
Sold Out
21
Unchanged
21
Holder count: +39
Institutional value: +197.4%
Shares held: +10.3%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 188
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1304492 CUSIP 03676C100 13F (30d) 161 filings 160 filers Visit website Investor relations