Anterix Inc. (ATEX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

18,682,899Shares Outstanding

16,305,164Shares held by institutions

$657,750,316Value of institutional holdings

87.27%Institutional ownership %

-7.38%Shares Changed QoQ

116No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Anterix Inc. (NASDAQ:ATEX) is held by 116 institutional investors per 13F filings through December 2025.

These investors collectively held 86.6% of Anterix's outstanding shares in December 2025, down from 96.2% in September 2025.
Their total shares held in ATEX decreased -7.92% quarter over quarter, and separately, investors owning Anterix decreased 0.85% from a year ago.
Of these 116 funds, 60 grew their exposure to Anterix, 44 cut back, and 12 maintained positions.
Institutional investors collectively held 16.18Mn shares in Anterix as of December 2025, down by 1.39Mn shares quarter on quarter, and up 46.76K shares year over year.
Owl Creek Asset Management, L.P. is the top holder of Anterix as of December 31, 2025, with 5.41Mn shares representing 28.97% of outstanding stock.
Leading buyers of Anterix shares for the quarter ending December 2025 were Jefferies Financial Group Inc. (454.51K), MILLENNIUM MANAGEMENT LLC (404.84K), Potomac Capital Management, Inc. (161.4K), Beartown Capital Management, LLC (145.0K), JANE STREET GROUP, LLC (116.73K).
Top sellers of ATEX stock for the quarter ending December 2025 included Heard Capital LLC (1.72Mn), DG Capital Management, LLC (723.3K), FMR LLC (236.74K), TUDOR INVESTMENT CORP ET AL (132.42K), Bank Of America Corp /De/ (129.85K).
Per Business Quant, the top 10 investors in ATEX for the quarter ending December 2025 include Owl Creek Asset Management, L.P. (5.41Mn), Heard Capital LLC (1.72Mn), BlackRock, Inc. (1.02Mn), VANGUARD GROUP INC (931.3K), QVT Financial LP (503.94K), Jefferies Financial Group Inc. (454.51K), MILLENNIUM MANAGEMENT LLC (439.95K), GAMCO INVESTORS, INC. ET AL (422.47K), GARNET EQUITY CAPITAL HOLDINGS, INC. (397.4K), GEODE CAPITAL MANAGEMENT, LLC (360.14K).

116 Institutional Holders

16,305,164 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Owl Creek Asset Management, L.P.	31 Dec, 2025	5,411,776	0	0.00%	$118,139,070.00
Heard Capital LLC	31 Dec, 2025	1,716,738	-1,716,738	-50.00%	$37,476,391.00
BlackRock, Inc.	31 Dec, 2025	1,018,275	-13,460	-1.30%	$22,228,954.00
VANGUARD GROUP INC	31 Dec, 2025	931,305	-77,072	-7.64%	$20,330,388.00
QVT Financial LP	31 Dec, 2025	503,941	0	0.00%	$11,001,032.00
Jefferies Financial Group Inc.	31 Dec, 2025	454,508	454,508	0.00%	$9,921,910.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	439,946	404,838	1,153.12%	$9,604,021.00
GAMCO INVESTORS, INC. ET AL	31 Dec, 2025	422,470	102,400	31.99%	$9,222,520.00
GARNET EQUITY CAPITAL HOLDINGS, INC.	31 Dec, 2025	397,395	0	0.00%	$8,675,133.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	360,139	-1,190	-0.33%	$7,863,736.00
State Street Corp	31 Dec, 2025	333,788	17,017	5.37%	$7,286,592.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	324,923	13,633	4.38%	$7,092,536.00
GABELLI FUNDS LLC	31 Dec, 2025	304,907	18,625	6.51%	$6,656,120.00
MARSHALL WACE, LLP	31 Dec, 2025	291,255	4,674	1.63%	$6,358,098.00
AYAL Capital Advisors Ltd	31 Dec, 2025	265,000	56,029	26.81%	$5,784,950.00
Goldman Sachs Group Inc	31 Dec, 2025	249,260	85,808	52.50%	$5,441,346.00
Potomac Capital Management, Inc.	31 Dec, 2025	161,400	161,400	0.00%	$3,523,362.00
JANE STREET GROUP, LLC	31 Dec, 2025	159,014	116,731	276.07%	$3,471,275.00
Beartown Capital Management, LLC	31 Dec, 2025	145,000	145,000	0.00%	$3,165,350.00
Bank Of America Corp /De/	31 Dec, 2025	143,124	-129,854	-47.57%	$3,124,397.00

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