ATEX · Anterix Inc. · Shareholders & Ownership
Every disclosed holder of ATEX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns ATEX
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 19,021,877 | 97.00% |
| Insiders (Forms 3, 4, 5) | 371,231 | 1.89% |
| 13D/G-only blocks | 744,544 | 3.80% |
| Remaining | 527,866 | -2.69% |
| Registered funds (N-PORT, not summed) | 6,264,530 | 31.95% |
Shares outstanding: 19,609,786, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of ATEX
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
5,553,282 | ||
| 2 |
Owl Creek Asset Management, L.P.
13F
CIK 1313756 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,411,776 | ||
| 3 |
T. Rowe Price Investment Management, Inc.
13F
CIK 1897612 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,348,019 | ||
| 3.1 |
T. Rowe Price Investment Management, Inc.
13G
CIK 1897612 · Investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
2,348,019 | ||
| 4 |
Heard Capital LLC
13F
CIK 1796409 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,716,738 | ||
| 5 |
|
1,674,303 | ||
| 6 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,075,115 | ||
| 6.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
999,278 | ||
| 6.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
298,050 | ||
| 6.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
107,877 | ||
| 6.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
38,466 | ||
| 6.5 |
iShares Core S&P Total U.S. Stock Market ETF
Fund
S000004317 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
25,722 | ||
| 7 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
750,451 | ||
| 7.1 |
T. Rowe Price Small-Cap Stock Fund, Inc.
Fund
S000002120 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed
|
725,484 | ||
| 7.2 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
470,800 | ||
| 7.3 |
T. Rowe Price Institutional Small-Cap Stock Fund
Fund
S000002094 · Registered fund · Jun 30, 2026
T. Rowe Price Equity Funds, Inc., not summed
|
386,817 | ||
| 7.4 |
T. Rowe Price Small-Cap Value Fund, Inc.
Fund
S000002121 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP VALUE FUND, INC., not summed
|
237,988 | ||
| 7.5 |
T. Rowe Price Spectrum Moderate Growth Allocation Fund
Fund
S000002138 · Registered fund · May 31, 2026
T. ROWE PRICE SPECTRUM FUNDS II, INC., not summed
|
10,047 | ||
| 8 |
DG Capital Management, LLC
13G
CIK 1512716 · Registered investment adviser · Sep 30, 2025
Rule 13d-1(b), qualified institution
|
744,544 | ||
| 9 |
Jupiter Topco LLC
13F
CIK 2146052 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
662,415 | ||
| 9.1 |
Janus Henderson Small/Mid Cap Growth Alpha ETF
Fund
S000052564 · Registered fund · Jul 31, 2026
Janus Detroit Street Trust, not summed
|
66,695 | ||
| 9.2 |
Janus Henderson Small Cap Growth Alpha ETF
Fund
S000052563 · Registered fund · Jul 31, 2026
Janus Detroit Street Trust, not summed
|
26,503 | ||
| 10 |
Janus Henderson Contrarian Fund
Fund
S000010475 · Registered fund · Jun 30, 2026
Janus Investment Fund, not summed
|
634,831 | ||
| 11 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
553,002 | ||
| 12 |
PLUSTICK MANAGEMENT LLC
13F
CIK 1643351 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
520,000 | ||
| 13 |
|
495,950 | ||
| 13.1 |
State Street(R) SPDR(R) S&P(R) Telecom ETF
Fund
S000012323 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
220,656 | ||
| 13.2 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
4,007 | ||
| 13.3 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
290 | ||
| 13.4 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
123 | ||
| 14 |
GAMCO INVESTORS, INC. ET AL
13F
CIK 807249 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
415,520 | ||
| 15 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
388,076 | ||
| 16 |
QVT Financial LP
13F
CIK 1290162 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
383,941 | ||
| 17 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
370,964 | ||
| 17.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
77,280 | ||
| 17.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
67,230 | ||
| 17.3 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
61,317 | ||
| 17.4 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
29,123 | ||
| 17.5 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
18,714 | ||
| 18 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
370,400 | ||
| 18.1 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
125,779 | ||
| 18.2 |
Select Wireless Portfolio
Fund
S000007489 · Registered fund · May 31, 2026
Fidelity Select Portfolios, not summed
|
101,600 | ||
| 18.3 |
Select Telecommunications Portfolio
Fund
S000007485 · Registered fund · May 31, 2026
Fidelity Select Portfolios, not summed
|
97,200 | ||
| 18.4 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
96,780 | ||
| 18.5 |
Fidelity Telecom and Utilities Fund
Fund
S000039312 · Registered fund · Jul 31, 2026
Fidelity Select Portfolios, not summed
|
73,000 | ||
| 19 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
327,993 | ||
| 20 |
GABELLI FUNDS LLC
13F
CIK 1081407 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
278,500 | ||
| 20.1 |
Gabelli Global Content & Connectivity Fund
Fund
S000001067 · Registered fund · Jun 30, 2026
GAMCO Global Series Funds, Inc, not summed
|
70,000 | ||
| 20.2 |
Keeley Small Cap Fund
Fund
S000001085 · Registered fund · Jun 30, 2026
Teton Westwood Funds, not summed
|
50,000 | ||
| 20.3 |
The Gabelli Utilities Fund
Fund
S000001075 · Registered fund · Jun 30, 2026
Gabelli Utilities Fund, not summed
|
31,000 | ||
| 20.4 |
Gabelli Global Mini Mites Fund
Fund
S000063160 · Registered fund · Jun 30, 2026
GAMCO Global Series Funds, Inc, not summed
|
5,000 | ||
| 20.5 |
The Gabelli Asset Fund
Fund
S000001087 · Registered fund · Jun 30, 2026
Gabelli Asset Fund, not summed
|
4,500 | ||
| 21 |
1290 VT GAMCO Small Company Value Portfolio
Fund
S000009151 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
|
262,000 | ||
| 22 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
214,766 | ||
| 23 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
200,975 | ||
| 23.1 |
Invesco Dorsey Wright Technology Momentum ETF
Fund
S000013110 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
160,831 | ||
| 23.2 |
Invesco Russell 2000 Dynamic Multifactor ETF
Fund
S000064608 · Registered fund · May 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
773 | ||
| 24 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
158,469 | ||
| 25 |
GARNET EQUITY CAPITAL HOLDINGS, INC.
13F
CIK 1423876 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
156,119 | ||
| 26 |
Potomac Capital Management, Inc.
13F
CIK 1418746 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
155,071 | ||
| 27 |
Panoramic Capital, LLC
13F
CIK 1950490 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
154,377 | ||
| 28 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,334 | ||
| 28.1 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
2,929 | ||
| 29 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,278 | ||
| 29.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
90,919 | ||
| 29.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
27,916 | ||
| 29.3 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
11,166 | ||
| 29.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
10,260 | ||
| 30 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
134,686 | ||
| 31 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
123,231 | ||
| 31.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
5,813 | ||
| 31.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
5,005 | ||
| 32 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
120,999 | ||
| 33 |
KIRR MARBACH & CO LLC /IN/
13F
CIK 764112 · Unknown · Sep 30, 2026
|
116,554 | ||
| 34 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
92,990 | ||
| 35 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
80,425 | ||
| 35.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
139 | ||
| 36 |
|
77,022 | ||
| 37 |
Beartown Capital Management, LLC
13F
CIK 1877162 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
75,000 | ||
| 38 |
Granahan Investment Management, LLC
13F
CIK 1026710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
72,121 | ||
| 39 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
69,374 | ||
| 40 |
Marble Bar Asset Management LLP
13F
CIK 1346570 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
68,248 | ||
| 41 |
683 Capital Management, LLC
13F
CIK 1404574 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
66,000 | ||
| 42 |
|
59,998 | ||
| 43 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
57,887 | ||
| 44 |
Trexquant Investment LP
13F
CIK 1633445 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
53,423 | ||
| 45 |
TD Asset Management Inc
13F
CIK 1056053 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
53,258 | ||
| 46 |
Informed Momentum Co LLC
13F
CIK 1510989 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
52,534 | ||
| 47 |
|
50,477 | ||
| 48 |
Potrero Capital Research LLC
13F
CIK 1536630 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
46,525 | ||
| 49 |
|
44,876 | ||
| 50 |
Teton Advisors, LLC
13F
CIK 2086025 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
43,000 |
33 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 266 holders
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