Company · Ownership research

ADTRAN Holdings, Inc. ADTN

CIK 0000926282 · CUSIP 00486H105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 00486H105 (ADTN), not CUSIP 00486H905 (ADTN), CUSIP 00486H955 (ADTN), CUSIP 00738A106 (ADTN), and does not merge CUSIPs.

This page lists the top 20 of 213 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	VANGUARD GROUP INC CIK 102909 · View history	$71.16M 8,188,496 shares	0.00%	-194.81K(-2.30%)Reduced	SEC filing ↗ Jan 29, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$70.61M 8,125,259 shares	0.00%	-148.06K(-1.80%)Reduced	SEC filing ↗ Feb 12, 2026	▾
03	DNB Asset Management AS CIK 1456670 · View history	$27.14M 3,123,679 shares	0.09%	+219.81K(+7.60%)Added	SEC filing ↗ Feb 5, 2026	▾
04	Divisar Capital Management LLC CIK 1645721 · View history	$25.95M 2,986,302 shares	7.29%	-226.79K(-7.10%)Reduced	SEC filing ↗ Feb 17, 2026	▾
05	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$23.42M 2,694,800 shares	0.02%	+2.12M(+371.20%)Added	SEC filing ↗ Feb 17, 2026	▾
06	ROYCE & ASSOCIATES LP CIK 906304 · View history	$22.57M 2,597,013 shares	0.23%	+186.24K(+7.70%)Added	SEC filing ↗ Feb 9, 2026	▾
07	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$21.54M 2,478,621 shares	0.06%	-257.81K(-9.40%)Reduced	SEC filing ↗ Feb 9, 2026	▾
08	STATE STREET CORP CIK 93751 · View history	$17.26M 1,985,890 shares	0.00%	+86.38K(+4.50%)Added	SEC filing ↗ Feb 13, 2026	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$15.35M 1,766,102 shares	0.00%	-4.08K(-0.20%)Reduced	SEC filing ↗ Feb 9, 2026	▾
10	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$12.58M 1,447,500 shares	0.79%	+272.50K(+23.20%)Added	SEC filing ↗ Feb 17, 2026	▾
11	MORGAN STANLEY CIK 895421 · Amended · View history	$11.68M 1,343,547 shares	0.00%	+550.01K(+69.30%)Added	SEC filing ↗ May 27, 2026	▾
12	First Eagle Investment Management, LLC CIK 1325447 · View history	$10.73M 1,235,207 shares	0.02%	+26.00K(+2.20%)Added	SEC filing ↗ Feb 4, 2026	▾
13	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$10.42M 1,198,773 shares	0.01%	+873.90K(+269.00%)Added	SEC filing ↗ Feb 17, 2026	▾
14	PARADIGM CAPITAL MANAGEMENT INC/NY CIK 1037792 · View history	$9.82M 1,129,909 shares	0.41%	+949.91K(+527.70%)Added	SEC filing ↗ Feb 12, 2026	▾
15	Assenagon Asset Management S.A. CIK 1546007 · View history	$9.81M 1,129,047 shares	0.01%	+196.37K(+21.10%)Added	SEC filing ↗ Jan 9, 2026	▾
16	BARCLAYS PLC CIK 312069 · View history	$9.78M 1,125,703 shares	0.00%	+319.36K(+39.60%)Added	SEC filing ↗ Feb 13, 2026	▾
17	Ophir Asset Management Pty Ltd CIK 1844640 · View history	$9.29M 1,069,420 shares	1.04%	-135.33K(-11.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
18	Tieton Capital Management, LLC CIK 1381954 · View history	$8.59M 988,379 shares	2.94%	-745(-0.10%)Reduced	SEC filing ↗ Feb 10, 2026	▾
19	TUDOR INVESTMENT CORP ET AL CIK 923093 · View history	$8.23M 947,508 shares	0.05%	+50.39K(+5.60%)Added	SEC filing ↗ Feb 17, 2026	▾
20	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$7.72M 888,180 shares	0.00%	+457.14K(+106.10%)Added	SEC filing ↗ Feb 12, 2026	▾

Showing 20 / 213 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

213

Cancelled or null records excluded

Disclosed shares

70,352,595

Not deduplicated across managers

Disclosed value

$611.54M

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.

ADTRAN Holdings, Inc. · Q4 2025

Explore all 213 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.