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ISSUER PROFILE · CIK 0001304492 · CUSIP 03676C100

Anterix Inc.ATEX

11 13D/G filings 3 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
avg —
Median 60d
avg —
Median 90d
avg —
Median 180d
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
11
1 SCHEDULE · 10 SC
Distinct filers
3
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
5.74
as of 2026-03-31

13D/G Filings Timeline · 11 total

FiledFormFilerStakeSharesIntent
2025-03-05 SCHEDULE Heard Capital LLC 9.40% 1,741,989 view →
2020-07-20 SC Owl Creek Asset Management, L.P. view →
2020-05-15 SC Owl Creek Asset Management, L.P. view →
2020-05-11 SC FEINBERG STEPHEN view →
2020-03-17 SC Owl Creek Asset Management, L.P. view →
2020-02-03 SC FEINBERG STEPHEN view →
2019-11-07 SC FEINBERG STEPHEN view →
2019-10-21 SC Owl Creek Asset Management, L.P. view →
2019-10-09 SC Owl Creek Asset Management, L.P. view →
2019-09-04 SC FEINBERG STEPHEN view →
2019-06-07 SC FEINBERG STEPHEN view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-03-31 1,587,737 5.74 +3.8%
2026-03-13 1,530,247 5.12 -4.5%
2026-02-27 1,603,040 2.82 +10.1%
2026-02-13 1,455,603 3.01 +4.2%
2026-01-30 1,397,221 3.48 +14.0%
2026-01-15 1,225,669 6.01 +8.4%
2025-12-31 1,130,654 5.54 +1.5%
2025-12-15 1,113,996 5.06 +0.1%

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