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 195 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	$73.25M 8,166,157 shares	0.00%	+1.07M(+15.10%)Added	SEC filing ↗ Aug 11, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$72.28M 8,058,350 shares	0.00%	+459.63K(+6.00%)Added	SEC filing ↗ Aug 12, 2025	▾
03	Divisar Capital Management LLC CIK 1645721 · View history	$37.94M 4,229,362 shares	8.78%	+800.50K(+23.30%)Added	SEC filing ↗ Aug 14, 2025	▾
04	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$26.04M 2,902,526 shares	0.07%	-236.58K(-7.50%)Reduced	SEC filing ↗ Jul 29, 2025	▾
05	DNB Asset Management AS CIK 1456670 · View history	$24.48M 2,729,515 shares	0.10%	-822.09K(-23.10%)Reduced	SEC filing ↗ Aug 12, 2025	▾
06	ROYCE & ASSOCIATES LP CIK 906304 · View history	$18.86M 2,102,070 shares	0.19%	+695.57K(+49.50%)Added	SEC filing ↗ Aug 11, 2025	▾
07	STATE STREET CORP CIK 93751 · View history	$16.64M 1,855,480 shares	0.00%	-60.98K(-3.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$15.69M 1,749,306 shares	0.00%	-76.96K(-4.20%)Reduced	SEC filing ↗ Aug 8, 2025	▾
09	First Eagle Investment Management, LLC CIK 1325447 · View history	$10.17M 1,133,607 shares	0.02%	-10.50K(-0.90%)Reduced	SEC filing ↗ Aug 6, 2025	▾
10	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$10.05M 1,120,000 shares	0.80%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
11	WESTERLY CAPITAL MANAGEMENT, LLC CIK 1546172 · View history	$8.75M 975,000 shares	3.71%	+140.00K(+16.80%)Added	SEC filing ↗ Aug 14, 2025	▾
12	Tieton Capital Management, LLC CIK 1381954 · View history	$8.54M 952,492 shares	3.34%	-8.25K(-0.90%)Reduced	SEC filing ↗ Aug 12, 2025	▾
13	MORGAN STANLEY CIK 895421 · View history	$8.47M 943,998 shares	0.00%	-98.73K(-9.50%)Reduced	SEC filing ↗ Aug 14, 2025	▾
14	SG Capital Management LLC CIK 1510099 · View history	$7.60M 847,417 shares	0.65%	+847.42KNew	SEC filing ↗ Aug 8, 2025	▾
15	MARSHALL WACE, LLP CIK 1318757 · View history	$7.32M 816,533 shares	0.01%	+382.61K(+88.20%)Added	SEC filing ↗ Aug 13, 2025	▾
16	FEDERATED HERMES, INC. CIK 1056288 · View history	$6.89M 767,743 shares	0.01%	+5.22K(+0.70%)Added	SEC filing ↗ Aug 13, 2025	▾
17	Kovack Advisors, Inc. CIK 1728321 · View history	$6.41M 714,200 shares	0.63%	+22.95K(+3.30%)Added	SEC filing ↗ Aug 4, 2025	▾
18	Qube Research & Technologies Ltd CIK 1729829 · View history	$6.16M 686,711 shares	0.01%	+360.84K(+110.70%)Added	SEC filing ↗ Aug 14, 2025	▾
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$6.12M 682,069 shares	0.00%	-22.20K(-3.20%)Reduced	SEC filing ↗ Aug 12, 2025	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$6.08M 677,409 shares	0.00%	-67.01K(-9.00%)Reduced	SEC filing ↗ Aug 13, 2025	▾

Showing 20 / 195 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

195

Cancelled or null records excluded

Disclosed shares

59,497,285

Not deduplicated across managers

Disclosed value

$533.69M

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. · Q2 2025

Explore all 195 reporting institutions.

This page includes 20 of 195 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.