Anterix Inc. (ATEX) Institutional Ownership

Institutions by Trading Activity

18,682,899Shares Outstanding

16,305,164Shares held by institutions

$920,752,611Value of institutional holdings

87.27%Institutional ownership %

-7.38%Shares Changed QoQ

116No. of institutional investors

Anterix Inc. (NASDAQ:ATEX) has 116 institutional investors that have filed 13F reports for the period ending December 2025.

Their combined ownership stood at 86.6% of 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.
Among the 116 funds, 60 bought more Anterix shares, 44 sold down, and 12 held their ground.
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.
KIRR MARBACH & CO LLC /IN/ holds the largest position in ATEX at 113.81K shares as of December 31, 2025, or 0.61% of shares outstanding.
Top purchasers of ATEX stock for the quarter ending December 2025 included KIRR MARBACH & CO LLC /IN/ (13.4K), Inspire Investing, LLC (13.31K), FNY Investment Advisers, LLC (11.22K), IFP Advisors, Inc (1.08K), Versant Capital Management, Inc (405).
The largest sales of ATEX for the quarter ending December 2025 came from STRS OHIO (10.8K).
Per Business Quant, the top 10 investors in ATEX for the quarter ending December 2025 include KIRR MARBACH & CO LLC /IN/ (113.81K), STRS OHIO (15.7K), Inspire Investing, LLC (13.31K), FNY Investment Advisers, LLC (11.22K), Central Pacific Bank - Trust Division (6.0K), IFP Advisors, Inc (1.08K), SIGNATUREFD, LLC (449), Versant Capital Management, Inc (405), Private Wealth Management Group, LLC (185), Farther Finance Advisors, LLC (132).

16,305,164 Total Shares Held

Rows:

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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