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 228 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	BlackRock, Inc. CIK 2012383 · View history	$98.63M 7,840,254 shares	0.00%	-285.00K(-3.50%)Reduced	SEC filing ↗ May 13, 2026	▾
02	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$60.02M 4,771,452 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$43.10M 3,426,230 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	ROYCE & ASSOCIATES LP CIK 906304 · View history	$39.34M 3,127,403 shares	0.39%	+530.39K(+20.40%)Added	SEC filing ↗ May 12, 2026	▾
05	DNB Asset Management AS CIK 1456670 · View history	$39.30M 3,123,679 shares	0.14%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$29.57M 2,350,737 shares	0.00%	+364.85K(+18.40%)Added	SEC filing ↗ May 15, 2026	▾
07	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$25.03M 1,989,530 shares	0.08%	-489.09K(-19.70%)Reduced	SEC filing ↗ May 8, 2026	▾
08	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$23.86M 1,896,411 shares	0.02%	-798.39K(-29.60%)Reduced	SEC filing ↗ May 15, 2026	▾
09	MORGAN STANLEY CIK 895421 · View history	$23.06M 1,832,872 shares	0.00%	+489.32K(+36.40%)Added	SEC filing ↗ May 15, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$22.89M 1,819,123 shares	0.00%	+53.02K(+3.00%)Added	SEC filing ↗ May 15, 2026	▾
11	Divisar Capital Management LLC CIK 1645721 · View history	$22.26M 1,769,439 shares	5.67%	-1.22M(-40.70%)Reduced	SEC filing ↗ May 15, 2026	▾
12	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$18.51M 1,518,697 shares	0.00%	+1.08M(+249.00%)Added	SEC filing ↗ May 13, 2026	▾
13	First Eagle Investment Management, LLC CIK 1325447 · Amended · View history	$17.22M 1,368,707 shares	0.03%	+133.50K(+10.80%)Added	SEC filing ↗ May 14, 2026	▾
14	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$16.82M 1,337,028 shares	0.00%	+448.85K(+50.50%)Added	SEC filing ↗ May 7, 2026	▾
15	SG Americas Securities, LLC CIK 1313360 · View history	$16.56M 1,316,049 shares	0.02%	+459.00K(+53.60%)Added	SEC filing ↗ Apr 16, 2026	▾
16	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$15.45M 1,228,500 shares	0.79%	-219.00K(-15.10%)Reduced	SEC filing ↗ May 15, 2026	▾
17	Shannon River Fund Management LLC CIK 1301050 · View history	$15.35M 1,219,976 shares	2.93%	+1.22MNew	SEC filing ↗ May 14, 2026	▾
18	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$15.33M 1,218,969 shares	0.01%	+20.20K(+1.70%)Added	SEC filing ↗ May 15, 2026	▾
19	Boston Partners CIK 1386060 · View history	$14.91M 1,181,314 shares	0.02%	+1.18MNew	SEC filing ↗ May 11, 2026	▾
20	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$14.13M 1,123,524 shares	0.01%	+1.05M(+1,492.90%)Added	SEC filing ↗ May 15, 2026	▾

Showing 20 / 228 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

228

Cancelled or null records excluded

Disclosed shares

78,668,678

Not deduplicated across managers

Disclosed value

$989.07M

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. · Q1 2026

Explore all 228 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.