SCHEDULE 13D/A Filed 2026-07-08 Event 2026-06-25 SEC 0000902664-26-003041 →

Owl Creek Asset Management, L.P. → Anterix Inc. ATEX

Stake: 28.50% Shares: 5,411,776 CUSIP: 03676C100 Class: Common Stock, par value $0.0001 per share

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

8 transactions

0 buys · 6 sales · 1 awards/exercises

Issuer Cluster

14 13D/G filings on this issuer

13 other filings besides this one

Filer Track Record

8 filings by this filer

7 other filings in the data moat

Short Interest · settle 2026-09-30

DTC 5.60

1,655,766 shares short · +0.5% vs prior

Post-Filing Returns · since 2026-06-25 on ATEX

+1 day

+10.7%

+5 days

+27.1%

+30 days

+15.8%

+60 days

—

+90 days

—

+180 days

—

Anchor price 81.00 on closest trading day on/after 2026-06-25. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-10-09	Marquez Elena	officer	Sale	3,254	$80.16	$261K
2026-10-09	Marquez Elena	officer	Sale	400	$81.80	$33K
2026-10-09	Marquez Elena	officer	Sale	100	$82.50	$8K
2026-10-09	Marquez Elena	officer	Option exercise	1,227	$40.00	$49K
2026-10-09	Marquez Elena	officer	Sale	1,017	$80.22	$82K
2026-10-09	Marquez Elena	officer	Sale	210	$81.90	$17K
2026-09-29	Marquez Elena	officer	F	1,325	$81.75	$108K
2026-09-21	Lang Scott A.	director, officer	Sale	15,000	$80.00	$1.20M

Other 13D/G Filings on Anterix Inc.

Filed	Form	Filer	Stake	Shares
2026-07-27	SCHEDULE 13G	BlackRock, Inc.	—	—	view →
2026-07-08	SCHEDULE 13G	T. Rowe Price Investment Management, Inc.	—	—	view →
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 →

Other Filings by Owl Creek Asset Management, L.P.

Filed	Form	Issuer	Stake	Shares
2021-01-26	SC	Garrett Motion Inc. GTX	—	—	view →
2021-01-06	SC	Garrett Motion Inc. GTX	—	—	view →
2020-07-20	SC	Anterix Inc. ATEX	—	—	view →
2020-05-15	SC	Anterix Inc. ATEX	—	—	view →
2020-03-17	SC	Anterix Inc. ATEX	—	—	view →
2019-10-21	SC	Anterix Inc. ATEX	—	—	view →
2019-10-09	SC	Anterix Inc. ATEX	—	—	view →

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