Skip to main content
Equibles

ATEX

Anterix Inc.
$105.14 -3.07 (-2.83%) At close · Jul 2
Market Cap
$2.05B
Shares
19,498,473

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 133
Total Value: $674,604,511
Total Shares: 17,663,669
Showing 1–100 of 143 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Superinvestors Holding ATEX

All superinvestors →
Mario Gabelli $16,262,065

Holder Concentration

Across 133 13F filers
Top Holder
30.6%
Jun 2023 → Mar 2026 · range 30.6% – 36.8%
of institutional value
Top 5
52.2%
Jun 2023 → Mar 2026 · range 52.2% – 67.9%
of institutional value
Top 10
64.6%
Jun 2023 → Mar 2026 · range 64.6% – 81.0%
of institutional value
HHI
1,154
Jun 2023 → Mar 2026 · range 1,154 – 1,667
Broadly held
Showing 100 of 143
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid Owl Creek Asset Management, L.P. $206,675,725 30.64% 5,411,776
Mid Heard Capital LLC $65,562,224 9.72% 1,716,738
Mega BlackRock, Inc. $38,462,787 5.70% 1,007,143
Mega VANGUARD CAPITAL MANAGEMENT LLC $21,915,216 3.25% 573,847
Mid QVT Financial LP $19,245,506 2.85% 503,941
Small PLUSTICK MANAGEMENT LLC $19,079,571 2.83% 499,596
Mid GAMCO INVESTORS, INC. ET AL $16,262,065 2.41% 425,820
Mega DIMENSIONAL FUND ADVISORS LP $16,225,249 2.41% 424,856
Mega JANE STREET GROUP, LLC $16,072,527 2.38% 420,857
Mega STATE STREET CORP $14,814,588 2.20% 387,918
Mega GEODE CAPITAL MANAGEMENT, LLC $14,294,554 2.12% 374,301
Small GARNET EQUITY CAPITAL HOLDINGS, INC. $13,118,112 1.94% 343,496
Mega MILLENNIUM MANAGEMENT LLC $11,759,541 1.74% 307,922
Large Caption Management, LLC $11,414,991 1.69% 298,900
Large GABELLI FUNDS LLC $10,150,902 1.50% 265,800
Small Potrero Capital Research LLC $8,766,934 1.30% 229,561
Small GRATIA CAPITAL, LLC $7,638,000 1.13% 200,000
Small AYAL Capital Advisors Ltd $7,527,974 1.12% 197,119
Large HRT FINANCIAL LP $6,680,385 0.99% 174,925
Small Potomac Capital Management, Inc. $6,637,498 0.98% 173,802
Small DG Capital Management, LLC $6,424,207 0.95% 168,217
Mega BANK OF AMERICA CORP /DE/ Bank $6,407,556 0.95% 167,781
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,278,436 0.93% 164,400
Mega GOLDMAN SACHS GROUP INC $6,178,606 0.92% 161,786
Mega CITADEL ADVISORS LLC $6,154,814 0.91% 161,163
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $5,399,607 0.80% 141,388
Mega FMR LLC $5,166,915 0.77% 135,295
Small Panoramic Capital, LLC $5,155,650 0.76% 135,000
Mid CenterBook Partners LP $4,875,870 0.72% 127,674
Mega CITIGROUP INC $4,577,491 0.68% 119,861
Mega VANGUARD FIDUCIARY TRUST CO Bank $4,562,024 0.68% 119,456
Mega NORTHERN TRUST CORP Bank $4,491,524 0.67% 117,610
Small KIRR MARBACH & CO LLC /IN/ $4,346,556 0.64% 113,814
Small ARDSLEY ADVISORY PARTNERS LP $4,200,900 0.62% 110,000
Mega MORGAN STANLEY $3,920,505 0.58% 102,658
Small Beartown Capital Management, LLC $3,819,000 0.57% 100,000
Small GRATIA CAPITAL, LLC $3,341,624 0.50% 87,500
Mid Atom Investors LP $3,214,796 0.48% 84,179
Mid OpenArc Corporate Advisory, LLC $2,820,255 0.42% 73,848
Mega Bank of New York Mellon Corp Bank $2,590,655 0.38% 67,836
Small Waterfront Wealth Inc. $2,289,681 0.34% 59,955
Large Squarepoint Ops LLC $2,281,317 0.34% 59,736
Micro Marble Bar Asset Management LLP $2,043,508 0.30% 53,509
Small Teton Advisors, LLC $2,024,070 0.30% 53,000
Small Resolute Capital Asset Partners LLC $1,951,738 0.29% 51,106
Mega UBS Group AG $1,828,346 0.27% 47,875
Mega CITADEL ADVISORS LLC $1,798,749 0.27% 47,100
Mid 683 Capital Management, LLC $1,756,740 0.26% 46,000
Large Caption Management, LLC $1,756,740 0.26% 46,000
Mid SIMPLEX TRADING, LLC $1,670,812 0.25% 43,750
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,645,989 0.24% 43,100
Mid Campbell & CO Investment Adviser LLC $1,545,167 0.23% 40,460
Large Trexquant Investment LP $1,534,283 0.23% 40,175
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,519,885 0.23% 39,798
Large Creative Planning $1,220,705 0.18% 31,964
Mid IMC-Chicago, LLC $1,159,562 0.17% 30,363
Large Schonfeld Strategic Advisors LLC $886,428 0.13% 23,211
Mega Nuveen, LLC $873,596 0.13% 22,875
Mega JANE STREET GROUP, LLC $782,895 0.12% 20,500
Small Proficio Capital Partners LLC $763,800 0.11% 20,000
Small Apis Capital Advisors, LLC $753,870 0.11% 19,740
Small WOODMONT INVESTMENT COUNSEL LLC $699,144 0.10% 18,307
Mid J. Goldman & Co LP $698,877 0.10% 18,300
Mega JANE STREET GROUP, LLC $691,239 0.10% 18,100
Mid Virtu Financial LLC $683,028 0.10% 17,885
Small GWN SECURITIES INC. Broker-Dealer $628,912 0.09% 16,468
Mega CITADEL ADVISORS LLC $626,316 0.09% 16,400
Large STRS OHIO $599,583 0.09% 15,700
Large Quantinno Capital Management LP $596,489 0.09% 15,619
Mid SIG BROKERAGE, LP Broker-Dealer $572,850 0.08% 15,000
Mid Quadrature Capital Ltd $553,831 0.08% 14,502
Mega RHUMBLINE ADVISERS $539,051 0.08% 14,115
Small Inspire Investing, LLC $508,270 0.08% 13,309
Large STATE OF WISCONSIN INVESTMENT BOARD $506,743 0.08% 13,269
Micro Jefferson Bridge Capital, LLC $494,560 0.07% 12,950
Mega ALLIANCEBERNSTEIN L.P. $463,244 0.07% 12,130
Small FNY Investment Advisers, LLC $428,529 0.06% 11,221
Mega AQR CAPITAL MANAGEMENT LLC $423,908 0.06% 11,100
Mega DEUTSCHE BANK AG\ Bank $360,665 0.05% 9,444
Large TORONTO DOMINION BANK Bank $347,529 0.05% 9,100
Mid J. Goldman & Co LP $344,970 0.05% 9,033
Large ExodusPoint Capital Management, LP $335,842 0.05% 8,794
Mid Quantbot Technologies LP $329,159 0.05% 8,619
Small Covestor Ltd $324,882 0.05% 8,507
Mega PRICE T ROWE ASSOCIATES INC /MD/ $303,801 0.05% 7,955
Small Potomac Capital Management, Inc. $286,425 0.04% 7,500
Small Gem Investment Advisors, LLC $274,318 0.04% 7,183
Mega Vanguard Global Advisers, LLC $266,031 0.04% 6,966
Mega AMERICAN CENTURY COMPANIES INC $254,383 0.04% 6,661
Large MetLife Investment Management, LLC $252,130 0.04% 6,602
Large PRUDENTIAL FINANCIAL INC $246,592 0.04% 6,457
Small Central Pacific Bank - Trust Division Bank $229,140 0.03% 6,000
Mega WELLS FARGO & COMPANY/MN $225,434 0.03% 5,903
Mega D. E. Shaw & Co., Inc. $217,530 0.03% 5,696
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $207,180 0.03% 5,425
Mid Brooklyn Investment Group $201,795 0.03% 5,284
Mega JPMORGAN CHASE & CO $193,851 0.03% 5,076
Small VIRTUS ADVISERS, LLC $133,665 0.02% 3,500
Large Police & Firemen's Retirement System of New Jersey Pension $117,205 0.02% 3,069
Mega ROYAL BANK OF CANADA Bank $115,867 0.02% 3,034
Key facts CIK 1304492 CUSIP 03676C100 13F (30d) 2 filings 2 filers Visit website Investor relations

Report a Problem

Category
Description
Email (optional, for follow-up)