ADTRAN Holdings, Inc.

ADTN

Exchange: Nasdaq
Industry: Telephone & Telegraph Apparatus
SEC CIK: 0000926282

SEC filings (opens in a new tab)

In the last 90 days, ADTRAN Holdings, Inc. insiders filed 1 open-market purchase and 0 sales; 249 institutions reported holding it in 13F filings for Q2 2026, worth $1.17B in total; no superinvestor holds it.

Q2 2026 vs. Q1 2026

How the institutions holding ADTRAN Holdings, Inc. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026 All holders in Q1 2026

13F holders of ADTN: Q1 2026 compared with Q2 2026
Measure	Q1 2026	Of which not filed for Q2 2026	Q2 2026	Change
Holders	228	2	249	+23
Shares	78.7M	57.3K	84.0M	+5.37M (+6.8%)
Value	$989.1M	$719.9K	$1.17B	+$178.1M (+18.0%)

2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (51)

Institutions that held ADTRAN Holdings, Inc. at the end of Q2 2026 but not at the end of Q1 2026.

Institutions new to ADTN in Q2 2026
Institution	Shares	Value	% of portfolio
Norges Bank	575,400	$8.00M	0.00%
Hennessy Advisors Inc	526,300	$7.32M	0.23%
Healthcare of Ontario Pension Plan Trust Fund	330,100	$4.59M	0.01%
Balyasny Asset Management LLC	275,489	$3.83M	0.01%
Gratia Capital, LLC	250,492	$3.48M	4.00%
Janney Montgomery Scott LLC	230,160	$3.20M	0.01%
NFJ Investment Group, LLC	208,413	$2.90M	0.10%
Empowered Funds, LLC	184,606	$2.57M	0.01%
Lazard Asset Management LLC	176,625	$2.46M	0.00%
Bienville Capital Management, LLC	127,247	$1.77M	0.26%
Titan Global Capital Management USA LLC	123,465	$1.72M	0.22%
Polymer Capital Management (US) LLC	101,366	$1.41M	0.21%
Burney Co	93,597	$1.30M	0.04%
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	90,000	$1.25M	0.00%
Diametric Capital, LP	71,342	$991.7K	0.11%
Knights of Columbus Asset Advisors LLC	68,284	$949.1K	0.05%
Dynamic Technology Lab Private Ltd	64,278	$893.0K	0.20%
State of Wyoming	36,213	$503.4K	0.05%
Optimist Retirement Group LLC	35,601	$494.9K	0.19%
Jupiter Topco LLC	32,900	$457.1K	0.00%
Edgestream Partners, L.P.	31,136	$432.8K	0.01%
Teza Capital Management LLC	27,209	$378.2K	0.73%
Magnetar Financial LLC	25,297	$351.6K	0.00%
State of New Jersey Common Pension Fund D	23,484	$326.4K	0.00%
Advisory Services Network, LLC	22,326	$310.3K	0.00%
Dark Forest Capital Management LP	21,180	$294.4K	0.02%
CI Private Wealth, LLC	19,969	$277.6K	0.00%
Alpine Global Management, LLC	18,854	$262.1K	0.04%
B. Riley Financial, Inc.	17,063	$237.2K	0.05%
BTG Pactual Asset Management US LLC	16,818	$233.8K	0.02%
Mitsubishi UFJ Trust & Banking Corp	16,471	$228.9K	0.00%
Bayforest Capital Ltd	15,181	$211.0K	0.20%
Focused Alpha, LLC	14,657	$203.7K	0.05%
Mirabella Financial Services LLP	14,618	$203.2K	0.02%
Amundi	13,530	$188.1K	0.00%
VARCOV Co.	12,176	$169.2K	0.06%
GTS Securities LLC	11,647	$161.9K	0.00%
L2 Asset Management, LLC	10,244	$142.4K	0.01%
Pacer Advisors, Inc.	8,951	$124.0K	0.00%
Persistent Asset Partners Ltd	2,035	$28.3K	0.01%
Optiver Holding B.V.	393	$5.46K	0.00%
Clearstead Advisors, LLC	152	$2.11K	0.00%
Barrow Hanley Mewhinney & Strauss LLC	131	$1.82K	0.00%
Pinnacle Wealth Planning Services, Inc.	127	$1.76K	0.00%
Newbridge Financial Services Group, Inc.	100	$1.39K	0.00%
Hollencrest Capital Management	61	$848	0.00%
C M Bidwell & Associates Ltd	50	$695	0.00%
UMA Financial Services, Inc.	29	$404	0.00%
Silver Grove Financial Group, Inc.	14	$195	0.00%
National Bank of Canada	8	$111	0.00%
Kilter Group LLC	1	$14	0.00%

Sold out (28)

Institutions that held ADTRAN Holdings, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.

Institutions that sold out of ADTN in Q2 2026
Institution	Shares, Q1 2026	Value, Q1 2026
Shannon River Fund Management LLC	1,219,976	$15.3M
Paradigm Capital Management Inc	733,200	$9.22M
Cramer Rosenthal McGlynn LLC	287,178	$3.61M
Manatuck Hill Partners, LLC	250,000	$3.15M
Landscape Capital Management, L.L.C.	128,002	$1.61M
Divisadero Street Capital Management, LP	121,731	$1.53M
Jump Financial, LLC	105,866	$1.33M
Nierenberg Investment Management Company, Inc.	93,110	$1.17M
HighTower Advisors, LLC	93,101	$1.17M
Susquehanna Portfolio Strategies, LLC	65,639	$825.7K
Voloridge Investment Management, LLC	33,937	$426.9K
Jain Global LLC	33,664	$423.5K
Group One Trading, L.P.	26,275	$330.5K
Bridgefront Capital, LLC	23,619	$297.1K
Fox Run Management, L.L.C.	18,098	$220.6K
Canada Pension Plan Investment Board	15,500	$195.0K
Winton Group Ltd	15,000	$188.7K
DRW Securities, LLC	14,600	$183.7K
Financial Engines Advisors L.L.C.	14,518	$182.6K
Neuberger Berman Group LLC	13,908	$175.0K
Cinctive Capital Management LP	13,522	$170.1K
Keebeck Alpha, LP	12,342	$155.3K
Thompson Davis & Co., Inc.	11,865	$149.3K
Freestone Grove Partners LP	7,731	$97.3K
MAI Capital Management	2,319	$29.2K
Root Financial Partners, LLC	276	$3.47K
Twin Peaks Wealth Advisors, LLC	60	$755
Wealth Preservation Advisors, LLC	53	$667

Not filed for Q2 2026 yet (2)

Institutions that held ADTRAN Holdings, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ADTN in Q1 2026 that haven't filed for Q2 2026
Institution	Shares, Q1 2026	Value, Q1 2026
Janus Henderson Group PLC	32,900	$412.7K
CWM, LLC	24,421	$307.2K