Anterix Inc. (ATEX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

18,652,064Shares Outstanding

6,379,294Shares held by institutions

$215,747,723Value of institutional holdings

86.48%Institutional ownership %

-6.68%Shares Changed QoQ

115No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 115 institutions have reported a stake in Anterix Inc. (NASDAQ:ATEX) as of December 2025, according to recent 13F filings with the SEC.

These investors collectively held 86.5% of the company's total shares outstanding in December 2025, down from 94.6% in September 2025.
In percentage terms, this reflects as a holdings change of -6.68% quarter on quarter, and a decrease of 1.71% year over year.
Of these 115 institutional investors, 60 increased their holdings in Anterix, while 42 of them reduced positions, and 13 investors maintained their exposure.
Collectively, institutional investors decreased their stake in Anterix to 16.13Mn shares as of December 2025, a change that is down by 1.15Mn shares quarter on quarter and up 94.96K shares year over year.
With 5.41Mn shares, Owl Creek Asset Management, L.P. commands the largest institutional position in Anterix as of December 31, 2025, equating to 29.01% of the company.
Among the most significant buyers of Anterix during December 2025 were Jefferies Financial Group Inc. (454.51K), MILLENNIUM MANAGEMENT LLC (404.84K), Potomac Capital Management, Inc. (182.90K), JANE STREET GROUP, LLC (113.33K), GAMCO INVESTORS, INC. ET AL (102.40K).
Leading sellers of Anterix stock in December 2025 included Heard Capital LLC (1.72Mn), DG Capital Management, LLC (723.30K), FMR LLC (236.75K), Qube Research & Technologies Ltd (78.94K), VANGUARD GROUP INC (77.07K).
The top 10 institutional holders of Anterix for the quarter ending December 2025 included Owl Creek Asset Management, L.P. (5.41Mn), Heard Capital LLC (1.72Mn), BlackRock, Inc. (1.02Mn), VANGUARD GROUP INC (931.30K), 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. (397.39K), GEODE CAPITAL MANAGEMENT, LLC (360.14K).

115 Institutional Holders

6,379,294 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
Potomac Capital Management, Inc.	31 Dec, 2025	182,900	182,900	0.00%	$3,992,707.00
JANE STREET GROUP, LLC	31 Dec, 2025	169,114	113,331	203.16%	$3,691,758.00
BANK OF AMERICA CORP /DE/	31 Dec, 2025	143,124	6,635	4.86%	$3,124,397.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	138,677	599	0.43%	$3,027,319.00
TUDOR INVESTMENT CORP ET AL	31 Dec, 2025	124,943	-3,738	-2.90%	$2,727,506.00

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