Atomera Inc

ATOM

Exchange: Nasdaq
Industry: Semiconductors & Related Devices
SEC CIK: 0001420520

SEC filings (opens in a new tab)

In the last 90 days, Atomera Inc insiders filed 0 open-market purchases and 4 sales; 121 institutions reported holding it in 13F filings for Q2 2026, worth $181.8M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Atomera Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of ATOM: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	95	2	108	+15
Shares	10.3M	1.65M	16.1M	+7.41M (+85.3%)
Value	$22.9M	$3.64M	$61.3M	+$42.0M (+218.7%)

2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (30)

Institutions that held Atomera Inc at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to ATOM in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	1,288,161	$4.91M	0.00%
Arosa Capital Management LP	490,000	$1.87M	1.22%
Vanguard Fiduciary Trust Co	216,392	$824.5K	0.00%
Vanguard Portfolio Management LLC	178,970	$681.9K	0.00%
Renaissance Technologies LLC	163,066	$621.3K	0.00%
PCM Encore, LLC	52,260	$199.1K	0.04%
Mirabella Financial Services LLP	23,082	$87.9K	0.01%
Connor, Clark & Lunn Investment Management Ltd.	21,087	$80.3K	0.00%
HighTower Advisors, LLC	19,371	$73.8K	0.00%
LPL Financial LLC	18,635	$71.0K	0.00%
IMC-Chicago, LLC	17,873	$68.1K	0.00%
Abel Hall, LLC	13,835	$52.7K	0.01%
Vanguard Global Advisers, LLC	10,582	$40.3K	0.00%
Smithfield Trust Co	6,445	$25.0K	0.00%
Clear Street Markets LLC	1,514	$5.77K	0.00%
UBS Asset Management Americas Inc	897	$3.42K	0.00%
EverSource Wealth Advisors, LLC	705	$2.69K	0.00%
Advisory Services Network, LLC	400	$1.52K	0.00%
Transamerica Financial Advisors, Inc.	363	$1.38K	0.00%
Bare Financial Services, Inc	309	$1.18K	0.00%
Rialto Wealth Management, LLC	129	$492	0.00%
Quantbot Technologies LP	100	$381	0.00%
Root Financial Partners, LLC	82	$312	0.00%
Essential Partners LLC	57	$217	0.00%
True Wealth Design, LLC	32	$122	0.00%
Sunbelt Securities, Inc.	24	$91	0.00%
Rothschild Investment LLC	16	$61	0.00%
MAI Capital Management	13	$50	0.00%
IFP Advisors, Inc	10	$38	0.00%
Farther Finance Advisors, LLC	2	$8	0.00%

Sold out (15)

Institutions that held Atomera Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of ATOM in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
XTX Topco Ltd	96,270	$212.8K
Gsa Capital Partners LLP	95,783	$212.0K
Two Sigma Advisers, LP	62,700	$138.6K
Los Angeles Capital Management LLC	38,047	$114.5K
Aristides Capital LLC	33,500	$74.0K
Jain Global LLC	31,143	$68.8K
Hilltop Holdings Inc.	24,200	$53.5K
Intech Investment Management LLC	13,511	$29.9K
HRT Financial LP	13,561	$29.0K
Cim Investment Mangement Inc	10,906	$24.1K
Quest Partners LLC	5,215	$11.5K
California State Teachers Retirement System	1,853	$4.09K
Tucker Asset Management LLC	1,360	$3.01K
Amalgamated Bank	949	$2.00K
Caitong International Asset Management Co., Ltd	1	$2

Not filed for Q1 2026 yet (2)

Institutions that held Atomera Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATOM in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	1,645,828	$3.64M
New Millennium Group LLC	750	$1.66K