Security key
03676C100
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 659,741
- Total 13F value
- $51,805,537
- Share change
- -53,466
- SEC-reported price per share
- $78.50
- Number of holders
- 35
- Value change
- -$7,135,303
- Number of buys
- 22
- Number of sells
- 10
- Shares outstanding
- 19,454,723
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
35
Top holders
10
ATEX full security history
Ownership snapshot
Full 13F holder table
Anterix Inc. SEC filings
Anterix Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of ATEX - Anterix Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Owl Creek Asset Managemen...
Disclosed value leader
Owl Creek Asset Managemen...
Comparable rows
6/15
Latest evidence
19 Aug 2026
13D/G
3/4/5
13F
Lead comparable stake: 28%
9 rows are not safely comparable across share classes.
13D/G row: Owl Creek Asset Management, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Owl Creek Asset Management, L.P. leads the comparable SEC ownership view at 28%.
6 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Owl Creek Asset Management, L.P.'s linked filing trail.
Comparable ownership
Top 5
Owl Creek Asset Management, L.P.
28%
T. Rowe Price Investment Manageme...
12%
Heard Capital LLC
9.4%
VANGUARD GROUP INC
5%
BlackRock, Inc.
4.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Owl Creek Asset Management, L.P. |
13D/G
3/4/5
13F
Jeffrey A. Altman · 10%+ Owner · Company
|
28%
Reported 13D/G
· 25 Jun 2026
|
$571,490,906
5,551,684 shares
|
$0 | 25 Jun 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
12%
Reported 13D/G
· 30 Jun 2026
|
$241,706,000
2,348,019 shares
|
— | 30 Jun 2026 |
| Heard Capital LLC |
13F
13D/G
Company
|
9.4%
Reported 13D/G
· 28 Feb 2025
|
$176,721,010
1,716,738 shares
|
— | 30 Jun 2026 |
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
5%
Reported 13D/G
· 31 Dec 2025
|
$20,330,854
931,305 shares
|
$0 | 31 Dec 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
4.7%
Reported 13D/G
· 30 Sep 2026
|
$110,672,390
1,075,115 shares
|
— | 30 Jun 2026 |
| DG Capital Management, LLC |
13D/G
|
4%
Reported 13D/G
· 30 Sep 2025
|
$15,985,360
744,544 shares
|
-$4,963,757 | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
35
Shares
659,741
Rows available
35
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
171
Q3 2026 holders
35
Holder diff
-136
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|