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ATOM · NASDAQ · Semiconductors

Atomera (ATOM)

Licenses MST transistor-enhancement technology, MSTcad software, and integration services to chipmakers.

$3.97

Pre-market−0.02 (−0.48%)

At close$3.99(+1.27%)

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Breakdown13F · 13D/G · Form 4

Institutions132 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail	≈ 53.82%	21.00M shares
Insiders8 holders · as of Aug 4, 2026	4.99%	1.95M shares
Otherremainder	≈ 41.19%	16.08M shares

39.02M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
BlackRock, Inc.Institution	7.66%	2.99M	13Fas of Jun 30, 2026
D. E. Shaw & Co., Inc.Institution	4.84%	1.89M	13Fas of Jun 30, 2026
Vanguard Capital Management LLCInstitution	4.27%	1.66M	13Fas of Jun 30, 2026
Avenir CorpInstitution	3.76%	1.47M	13Fas of Jun 30, 2026
Baird Financial Group, Inc.Institution	3.44%	1.34M	13Fas of Jun 30, 2026
UBS Group AGInstitution	3.41%	1.33M	13Fas of Jun 30, 2026
Geode Capital Management, LLCInstitution	2.54%	990,370	13Fas of Jun 30, 2026
Jane Street Group, LLCInstitution	2.08%	809,991	13Fas of Jun 30, 2026
Quantum Private Wealth, LLCInstitution	1.91%	743,895	13Fas of Jun 30, 2026
State Street CorpInstitution	1.84%	717,862	13Fas of Jun 30, 2026
Scott A. BibaudInsiderdirector, officer: CEO and President	1.78%	695,761	Form 4filed Jun 17, 2026 ↗
Two Sigma Investments, LPInstitution	1.71%	667,667	13Fas of Jun 30, 2026
Hollencrest Capital ManagementInstitution	1.47%	573,266	13Fas of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution	1.42%	554,452	13Fas of Jun 30, 2026
Northern Trust CorpInstitution	0.95%	370,601	13Fas of Jun 30, 2026
Connor, Clark & Lunn Investment Management Ltd.Institution	0.90%	352,205	13Fas of Jun 30, 2026
John GerberInsiderdirector	0.85%	332,569	Form 4filed May 13, 2026 ↗
Defender Capital, LLC.Institution	0.76%	295,450	13Fas of Jun 30, 2026
Vanguard Fiduciary Trust CoInstitution	0.70%	274,960	13Fas of Jun 30, 2026
Morgan StanleyInstitution	0.70%	274,394	13Fas of Jun 30, 2026
Robert J. MearsInsiderofficer: Chief Technology Officer	0.69%	270,715	Form 4filed Aug 4, 2026 ↗
Marshall Wace, LLPInstitution	0.68%	266,796	13Fas of Jun 30, 2026
Francis LaurencioInsiderofficer: CFO	0.65%	254,853	Form 4filed Jun 17, 2026 ↗
Pathstone Holdings, LLCInstitution	0.64%	250,905	13Fas of Jun 30, 2026
Trexquant Investment LPInstitution	0.58%	225,139	13Fas of Jun 30, 2026

13F — a manager's quarterly holdings · Form 4 — an insider's transaction report

Institutions13F, as of Jun 30, 2026

132 holders · 21.00M shares · 34 new positions · 86 increased · 23 reduced · 17 closed

Holder	Shares	% outstanding	Chg q/q	Filed
BlackRock, Inc.	2.99M	7.66%	+617.6K	Aug 7, 2026
D. E. Shaw & Co., Inc.	1.89M	4.84%	+914.4K	Aug 14, 2026
Vanguard Capital Management LLC	1.66M	4.27%	+376.4K	Aug 13, 2026
Avenir Corp	1.47M	3.76%	+7.2K	Aug 13, 2026
Baird Financial Group, Inc.	1.34M	3.44%	+63.2K	Aug 12, 2026
UBS Group AG	1.33M	3.41%	+1.15M	Aug 13, 2026
Geode Capital Management, LLC	990.4K	2.54%	+220.7K	Aug 12, 2026
Jane Street Group, LLC	810.0K	2.08%	+650.3K	Aug 14, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
BlackRock, Inc.	5.60%	1.72M	13G	Jul 17, 2025 ↗

Insider tradesForm 4

Latest trades

Date	Insider	Type	Shares	Avg price	Owned after
Aug 3, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale	1,000	$5.05	270,715
Jul 1, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale	1,000	$8.40	271,715
Jun 15, 2026	Scott A. Bibauddirector, officer: CEO and President	Sale	50,000	$9.37	695,761
Jun 15, 2026	Francis Laurencioofficer: CFO	Sale	12,500	$9.44	253,353
Jun 15, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale	8,182	$9.46	272,715
Jun 9, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale · 2 lots	18,012	$8.75	268,909
Jun 8, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale · 5 lots	37,156	$8.26	268,909
Jun 1, 2026	Francis Laurencioofficer: CFO	Sale · 4 lots	6,610	$9.52	253,353
Jun 1, 2026	Robert J. Mearsofficer: Chief Technology Officer	Sale · 4 lots	5,453	$9.52	277,950
Jun 1, 2026	Scott A. Bibauddirector, officer: CEO and President	Sale · 4 lots	13,980	$9.52	695,761

CongressHouse and Senate disclosures

Not reported.