Company · Ownership research

Anterix Inc. ATEX

CIK 0001304492 · CUSIP 03676C100

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 03676C100 (ATEX), not CUSIP 03676C900 (ATEX), CUSIP 03676C950 (ATEX), and does not merge CUSIPs.

This page lists the top 20 of 117 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Owl Creek Asset Management, L.P. CIK 1313756 · View history	$118.14M 5,411,776 shares	14.22%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
02	Heard Capital LLC CIK 1796409 · View history	$37.48M 1,716,738 shares	1.76%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
03	BlackRock, Inc. CIK 2012383 · View history	$22.23M 1,018,275 shares	0.00%	-13.46K(-1.30%)Reduced	SEC filing ↗ Feb 12, 2026	▾
04	VANGUARD GROUP INC CIK 102909 · View history	$20.33M 931,305 shares	0.00%	-77.07K(-7.60%)Reduced	SEC filing ↗ Jan 29, 2026	▾
05	QVT Financial LP CIK 1290162 · View history	$11.00M 503,941 shares	1.04%	0(0.00%)Unchanged	SEC filing ↗ Feb 13, 2026	▾
06	Jefferies Financial Group Inc. CIK 96223 · View history	$9.92M 454,508 shares	0.08%	+454.51KNew	SEC filing ↗ Feb 9, 2026	▾
07	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$9.60M 439,946 shares	0.01%	+404.84K(+1,153.10%)Added	SEC filing ↗ Feb 17, 2026	▾
08	GAMCO INVESTORS, INC. ET AL CIK 807249 · View history	$9.22M 422,470 shares	0.09%	+102.40K(+32.00%)Added	SEC filing ↗ Feb 5, 2026	▾
09	GARNET EQUITY CAPITAL HOLDINGS, INC. CIK 1423876 · View history	$8.68M 397,395 shares	4.32%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$7.86M 360,139 shares	0.00%	-1.19K(-0.30%)Reduced	SEC filing ↗ Feb 9, 2026	▾
11	STATE STREET CORP CIK 93751 · View history	$7.29M 333,788 shares	0.00%	+17.02K(+5.40%)Added	SEC filing ↗ Feb 13, 2026	▾
12	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$7.09M 324,923 shares	0.00%	+13.63K(+4.40%)Added	SEC filing ↗ Feb 12, 2026	▾
13	GABELLI FUNDS LLC CIK 1081407 · View history	$6.66M 304,907 shares	0.05%	+18.63K(+6.50%)Added	SEC filing ↗ Feb 5, 2026	▾
14	MARSHALL WACE, LLP CIK 1318757 · View history	$6.36M 291,255 shares	0.01%	+4.67K(+1.60%)Added	SEC filing ↗ Feb 13, 2026	▾
15	AYAL Capital Advisors Ltd CIK 2011524 · View history	$5.78M 265,000 shares	3.17%	+56.03K(+26.80%)Added	SEC filing ↗ Feb 17, 2026	▾
16	Potomac Capital Management, Inc. CIK 1418746 · View history	$3.52M 161,400 shares	2.95%	—	SEC filing ↗ Feb 11, 2026	▾
17	JANE STREET GROUP, LLC CIK 1595888 · View history	$3.47M 159,014 shares	0.00%	+116.73K(+276.10%)Added	SEC filing ↗ Feb 12, 2026	▾
18	Beartown Capital Management, LLC CIK 1877162 · View history	$3.17M 145,000 shares	2.48%	—	SEC filing ↗ Feb 18, 2026	▾
19	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$3.12M 143,124 shares	0.00%	+6.63K(+4.90%)Added	SEC filing ↗ Feb 17, 2026	▾
20	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$3.03M 138,677 shares	0.00%	+599(+0.40%)Added	SEC filing ↗ Feb 13, 2026	▾

Showing 20 / 117 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

117

Cancelled or null records excluded

Disclosed shares

16,180,545

Not deduplicated across managers

Disclosed value

$353.31M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Anterix Inc. · Q4 2025

Explore all 117 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.