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 221 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	$78.64M 8,383,305 shares	0.00%	+217.15K(+2.70%)Added	SEC filing ↗ Nov 7, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$77.60M 8,273,324 shares	0.00%	+214.97K(+2.70%)Added	SEC filing ↗ Nov 12, 2025	▾
03	Divisar Capital Management LLC CIK 1645721 · View history	$30.14M 3,213,090 shares	8.20%	-1.02M(-24.00%)Reduced	SEC filing ↗ Nov 14, 2025	▾
04	DNB Asset Management AS CIK 1456670 · View history	$27.24M 2,903,869 shares	0.10%	+174.35K(+6.40%)Added	SEC filing ↗ Nov 12, 2025	▾
05	Focus Partners Wealth CIK 1542153 · View history	$26.54M 109,183 shares	0.04%	+109.18KNew	SEC filing ↗ Nov 14, 2025	▾
06	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$25.67M 2,736,430 shares	0.07%	-166.10K(-5.70%)Reduced	SEC filing ↗ Nov 12, 2025	▾
07	ROYCE & ASSOCIATES LP CIK 906304 · View history	$22.61M 2,410,775 shares	0.23%	+308.70K(+14.70%)Added	SEC filing ↗ Nov 12, 2025	▾
08	STATE STREET CORP CIK 93751 · View history	$17.82M 1,899,508 shares	0.00%	+44.03K(+2.40%)Added	SEC filing ↗ Nov 14, 2025	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$16.61M 1,770,186 shares	0.00%	+20.88K(+1.20%)Added	SEC filing ↗ Nov 12, 2025	▾
10	CITADEL ADVISORS LLC CIK 1423053 · View history	$11.43M 1,218,868 shares	0.01%	+813.82K(+200.90%)Added	SEC filing ↗ Nov 14, 2025	▾
11	First Eagle Investment Management, LLC CIK 1325447 · View history	$11.34M 1,209,207 shares	0.02%	+75.60K(+6.70%)Added	SEC filing ↗ Nov 12, 2025	▾
12	Ophir Asset Management Pty Ltd CIK 1844640 · View history	$11.30M 1,204,749 shares	1.40%	+1.20MNew	SEC filing ↗ Nov 14, 2025	▾
13	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$11.02M 1,175,000 shares	0.77%	+55.00K(+4.90%)Added	SEC filing ↗ Nov 14, 2025	▾
14	Alyeska Investment Group, L.P. CIK 1453072 · View history	$10.17M 1,084,029 shares	0.03%	+1.08MNew	SEC filing ↗ Nov 17, 2025	▾
15	Tieton Capital Management, LLC CIK 1381954 · View history	$9.28M 989,124 shares	3.22%	+36.63K(+3.80%)Added	SEC filing ↗ Nov 12, 2025	▾
16	Assenagon Asset Management S.A. CIK 1546007 · View history	$8.75M 932,680 shares	0.01%	+814.86K(+691.60%)Added	SEC filing ↗ Oct 7, 2025	▾
17	WESTERLY CAPITAL MANAGEMENT, LLC CIK 1546172 · View history	$8.63M 920,220 shares	2.74%	-54.78K(-5.60%)Reduced	SEC filing ↗ Nov 14, 2025	▾
18	TUDOR INVESTMENT CORP ET AL CIK 923093 · Amended · View history	$8.41M 897,115 shares	0.05%	+729.19K(+434.20%)Added	SEC filing ↗ Dec 9, 2025	▾
19	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$7.63M 813,363 shares	0.00%	+356.88K(+78.20%)Added	SEC filing ↗ Nov 26, 2025	▾
20	BARCLAYS PLC CIK 312069 · Amended · View history	$7.56M 806,339 shares	0.00%	+211.75K(+35.60%)Added	SEC filing ↗ Mar 31, 2026	▾

Showing 20 / 221 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

221

Cancelled or null records excluded

Disclosed shares

67,504,589

Not deduplicated across managers

Disclosed value

$658.71M

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. · Q3 2025

Explore all 221 reporting institutions.

This page includes 20 of 221 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.