ATOM · Atomera Inc · Shareholders & Ownership

$3.21 +0.20 (+6.64%) Play latest call Q3 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$117.64M

39.08M

Volume · Nov 9 92.16K Avg daily vol (3M) 559.9K

Every disclosed holder of ATOM in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ATOM

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	118	21,144,815	54.10%	Yes
Insiders (Forms 3, 4, 5)	8	2,148,459	5.50%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	15,790,130	40.40%	Rest
Registered funds (N-PORT, not summed)	90	5,414,966	13.85%	No

Shares outstanding: 39,083,404, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ATOM

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,990,446	7.65%	+617,602	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	2,936,679	7.51%	+1,216,435	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
1.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,009,164	2.58%	+259,699	Jun 30, 2026	iShares Trust, not summed
1.3	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	338,614	0.87%	+88,348	Jun 30, 2026	iShares Trust, not summed
1.4	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	128,974	0.33%	+52,918	Jun 30, 2026	iShares Trust, not summed
1.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	71,627	0.18%	+20,927	Jun 30, 2026	Quantitative Master Series LLC, not summed
2	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,890,019	4.84%	+914,396	Jun 30, 2026	carried, not yet filed for the newest quarter
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,664,565	4.26%	+376,404	Jun 30, 2026	carried, not yet filed for the newest quarter
4	AVENIR CORP 13F CIK 1033475 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,468,660	3.76%	+7,245	Jun 30, 2026	carried, not yet filed for the newest quarter
5	Baird Financial Group, Inc. 13F CIK 1648711 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,340,888	3.43%	+63,208	Jun 30, 2026	carried, not yet filed for the newest quarter
6	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,328,824	3.40%	+1,152,963	Jun 30, 2026	carried, not yet filed for the newest quarter
7	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,171,475	3.00%	+280,620	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
8	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Sep 30, 2026	959,059	2.45%	-31,311	Sep 30, 2026
9	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	809,991	2.07%	+650,315	Jun 30, 2026	carried, not yet filed for the newest quarter
10	Quantum Private Wealth, LLC 13F CIK 1929662 · Registered investment adviser · Sep 30, 2026	762,062	1.95%	+18,167	Sep 30, 2026
11	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	717,862	1.84%	+139,965	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	10,800	0.03%	+600	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
11.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,071	0.00%	+143	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
12	BIBAUD SCOTT A. Insider CIK 1464249 · Sep 1, 2026 Director, CEO and President, issuer-wide	682,005	1.75%	-13,756	Sep 1, 2026	Director, CEO and President, issuer-wide
13	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	667,667	1.71%	+137,667	Jun 30, 2026	carried, not yet filed for the newest quarter
14	Defender Capital, LLC. 13F CIK 1766929 · Unknown · Sep 30, 2026	594,450	1.52%	+299,000	Sep 30, 2026
15	HOLLENCREST CAPITAL MANAGEMENT 13F CIK 1161722 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	573,266	1.47%	-23,933	Jun 30, 2026	carried, not yet filed for the newest quarter
16	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	554,452	1.42%	+375,482	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Gerber John Insider CIK 1681151 · May 12, 2026 Director, issuer-wide	534,857	1.37%	+14,302	May 12, 2026	Director, issuer-wide
18	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	457,294	1.17%	+89,320	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
19	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	370,601	0.95%	+81,921	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	19,789	0.05%	+3,008	Jun 30, 2026	Northern Funds, not summed
19.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	17,686	0.05%	-789	Jun 30, 2026	Northern Funds, not summed
20	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	352,205	0.90%	+331,118	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	274,960	0.70%	+58,568	Jun 30, 2026	carried, not yet filed for the newest quarter
22	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	274,394	0.70%	+2,792	Jun 30, 2026	carried, not yet filed for the newest quarter
23	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	266,796	0.68%	-221,879	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Mears Robert J Insider CIK 1680617 · Nov 2, 2026 Chief Technology Officer, issuer-wide	258,702	0.66%	-2,000	Nov 2, 2026	Chief Technology Officer, issuer-wide
25	VANGUARD U.S. MOMENTUM FACTOR ETF Fund S000061302 · Registered fund · Aug 31, 2026 VANGUARD WELLINGTON FUND, not summed	257,061	0.66%	—	Aug 31, 2026	VANGUARD WELLINGTON FUND, not summed
26	Pathstone Holdings, LLC 13F CIK 2011612 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	250,905	0.64%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Laurencio Francis Insider CIK 1680612 · Sep 1, 2026 CFO, issuer-wide	246,849	0.63%	-6,504	Sep 1, 2026	CFO, issuer-wide
28	Trexquant Investment LP 13F CIK 1633445 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	225,139	0.58%	+225,139	Jun 30, 2026	carried, not yet filed for the newest quarter
29	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	221,842	0.57%	-828,137	Jun 30, 2026	carried, not yet filed for the newest quarter
30	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · Aug 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	219,107	0.56%	+63,831	Aug 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
31	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	178,193	0.46%	-19,500	Jun 30, 2026	carried, not yet filed for the newest quarter
31.1	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	19,212	0.05%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
31.2	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	6,634	0.02%	-3,838	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
32	Sargent Investment Group, LLC 13F CIK 1766157 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	175,900	0.45%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
33	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	156,629	0.40%	+156,629	Jun 30, 2026	carried, not yet filed for the newest quarter
34	SHEVICK STEVEN K Insider CIK 1249845 · May 12, 2026 Director, issuer-wide	144,718	0.37%	+14,302	May 12, 2026	Director, issuer-wide
35	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	137,945	0.35%	+14,400	Jun 30, 2026	carried, not yet filed for the newest quarter
36	LE DUY LOAN T Insider CIK 1192886 · May 12, 2026 Director, issuer-wide	134,460	0.34%	+14,302	May 12, 2026	Director, issuer-wide
37	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	127,243	0.33%	—	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
38	Westside Investment Management, Inc. 13F CIK 1538383 · Registered investment adviser · Sep 30, 2026	119,682	0.31%	0	Sep 30, 2026
39	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	113,371	0.29%	+27,171	Jun 30, 2026	carried, not yet filed for the newest quarter
39.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	93,284	0.24%	+27,186	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
39.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	20,000	0.05%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
40	Ramnath Suja Insider CIK 1588000 · May 12, 2026 Director, issuer-wide	86,740	0.22%	+14,302	May 12, 2026	Director, issuer-wide
41	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Sep 30, 2026	84,306	0.22%	-9,875	Sep 30, 2026
42	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	74,185	0.19%	+20,141	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	T. Rowe Price Extended Equity Market Index Fund Fund S000002090 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	12,600	0.03%	0	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
42.2	T. Rowe Price Small-Cap Index Fund Fund S000051327 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	5,845	0.02%	+1,823	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
43	GROUP ONE TRADING LLC 13F CIK 932540 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	73,496	0.19%	-9,620	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	73,383	0.19%	+12,570	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	50,739	0.13%	+12,570	Jul 31, 2026	TIAA-CREF Funds, not summed
45	Jacob Internet Fund Fund S000005257 · Registered fund · Aug 31, 2026 Jacob Funds Inc., not summed	72,000	0.18%	-10,000	Aug 31, 2026	Jacob Funds Inc., not summed
46	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	71,455	0.18%	+71,455	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Informed Momentum Co LLC 13F CIK 1510989 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	71,261	0.18%	+71,261	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Numerai GP LLC 13F CIK 1668527 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	62,822	0.16%	+62,822	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Thomas Shawn G Insider CIK 2054590 · Feb 19, 2025 VP of Marketing and Bus Dev, issuer-wide	60,128	0.15%	—	Feb 19, 2025	VP of Marketing and Bus Dev, issuer-wide
50	Russell Investments Group, Ltd. 13F CIK 1692234 · Unknown · Sep 30, 2026	57,195	0.15%	+43,601	Sep 30, 2026

2 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 182 holders

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Key facts CIK 1420520 CUSIP 04965B100 13F (30d) 44 filings 32 filers Visit website Investor relations