As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Anterix Inc. The largest reported stake is Owl Creek Asset Management, L.P.'s, at 28.5%. 9 filings are on record since August 14, 2025 (Schedule 13D/A, July 8, 2026).
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Key facts
- · Reporting person: BlackRock, Inc. · Sole voting: 892,350 · Shared voting: 0 · Sole dispositive: 914,372 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-10-27
- · Holder: BlackRock, Inc. · Percent: 5.1% · SCHEDULE 13G
- · Reporting person: Owl Creek Asset Management, L.P. · Sole voting: 0 · Shared voting: 5,411,776 · Sole dispositive: 0 · Shared dispositive: 5,411,776 · SCHEDULE 13D/A, 2026-07-08
- · Reporting person: T. Rowe Price Investment Management, Inc. · Sole voting: 2,345,228 · Shared voting: 0 · Sole dispositive: 2,348,019 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-08
- · Holder: BlackRock, Inc. · Percent: 4.98% · SCHEDULE 13G/A
Anterix Inc. has 9 Schedule 13D or 13G filings on record since 2025-08-14. 2 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Owl Creek Asset Management, L.P. | 28.5% | 5,411,776 | SCHEDULE 13D/A, 2026-07-08 | 2026-06-25 |
| T. Rowe Price Investment Management, Inc. | 12% | 2,348,019 | SCHEDULE 13G, 2026-07-08 | 2026-06-30 |
| The Vanguard Group | 4.97% | 931,305 | SCHEDULE 13G/A, 2026-01-30 | 2025-12-31 |
| BlackRock, Inc. | 4.7% | 914,372 | SCHEDULE 13G/A, 2026-10-27 | 2026-09-30 |
| DG Capital Management, LLC | 4% | 744,544 | SCHEDULE 13G/A, 2025-11-12 | 2025-09-30 |
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More on Anterix Inc. and the records around it.
Anterix Inc. elsewhere on the record
Companies that share a holder
- DG Capital Management, LLC also filed stake reports on 1 other company: Hydrofarm Holdings Group, Inc. (Nov 2026)
- Owl Creek Asset Management, L.P. also filed stake reports on 3 other companies: Bitcoin Depot Inc. (Jul 2026), Copper Property CTL Pass Through Trust (May 2026), REPUBLIC AIRWAYS HOLDINGS INC. (Feb 2026)
- T. Rowe Price Investment Management, Inc. also filed stake reports on 167 other companies: CABALETTA BIO INC (Nov 2026), MADISON SQUARE GARDEN SPORTS CORP (Nov 2026), MSG RANGERS CORP (Nov 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Owl Creek Asset Management, L.P. | 0 | 5,411,776 | 0 | 5,411,776 | SCHEDULE 13D/A, 2026-07-08 |
| Jeffrey A. Altman | 139,908 | 5,411,776 | 139,908 | 5,411,776 | SCHEDULE 13D/A, 2026-07-08 |
| T. Rowe Price Investment Management, Inc. | 2,345,228 | 0 | 2,348,019 | 0 | SCHEDULE 13G, 2026-07-08 |
| BlackRock, Inc. | 892,350 | 0 | 914,372 | 0 | SCHEDULE 13G/A, 2026-10-27 |
The latest filing identifies Anterix Inc. by CUSIP 03676C100 and gives its principal executive office as 3 GARRET MOUNTAIN PLAZA, SUITE 401, WOODLAND PARK, NJ 07424 (SCHEDULE 13G/A, 2026-10-27).
Source of funds (Item 3)
Item 3 is hereby amended and restated in its entirety as follows: Mr. Altman holds a total of 15,416 vested and unvested restricted stock awards received in consideration for his services on the board of directors of the Issuer. Mr. Altman may be deemed to hold his stock awards for the benefit of the Owl Creek Funds.Owl Creek Asset Management, L.P., SCHEDULE 13D/A, 2026-07-08
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | DG Capital Management, LLC | 5.2% | SCHEDULE 13G |
| 2025-10-17 | BlackRock, Inc. | 5.1% | SCHEDULE 13G/A |
| 2025-11-12 | DG Capital Management, LLC | 4% | SCHEDULE 13G/A |
| 2026-01-30 | The Vanguard Group | 4.97% | SCHEDULE 13G/A |
| 2026-04-27 | BlackRock, Inc. | 4.98% | SCHEDULE 13G/A |
| 2026-07-08 | Owl Creek Asset Management, L.P. | 28.5% | SCHEDULE 13D/A |
| 2026-07-08 | T. Rowe Price Investment Management, Inc. | 12% | SCHEDULE 13G |
| 2026-07-27 | BlackRock, Inc. | 5.1% | SCHEDULE 13G |
| 2026-10-27 | BlackRock, Inc. | 4.7% | SCHEDULE 13G/A |
Questions about who owns Anterix Inc.
Who owns Anterix Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Anterix Inc.: Owl Creek Asset Management, L.P. (28.5%, Schedule 13D/A, filed 2026-07-08) and T. Rowe Price Investment Management, Inc. (12%, Schedule 13G, filed 2026-07-08).
Who are the largest shareholders of Anterix Inc.?
By the share each holder's latest filing reports, the largest holders of Anterix Inc. on this page are Owl Creek Asset Management, L.P. (28.5%) and T. Rowe Price Investment Management, Inc. (12%).
When did Owl Creek Asset Management, L.P. buy into Anterix Inc.?
The filings give report dates, not purchase dates. The earliest filing from Owl Creek Asset Management, L.P. on this page is the Schedule 13D/A, filed 2026-07-08, reporting 28.5%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.