AEHR · Aehr Test Systems · Shareholders & Ownership

$53.57 +4.41 (+8.97%) At close · Nov 6 Play latest call Q1 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$1.75B

32.62M

Volume · Nov 6 2.99M Avg daily vol (3M) 2.79M

Every disclosed holder of AEHR 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 AEHR

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)	290	23,651,907	72.51%	Yes
Insiders (Forms 3, 4, 5)	14	1,641,669	5.03%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	7,326,874	22.46%	Rest
Registered funds (N-PORT, not summed)	208	8,219,417	25.20%	No

Shares outstanding: 32,620,450, 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 AEHR

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	2,659,542	8.15%	+372,643	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	785,890	2.41%	+68,958	Jun 30, 2026	iShares Trust, not summed
1.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	280,984	0.86%	+87,527	Jun 30, 2026	iShares Trust, not summed
1.3	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · Aug 31, 2026 BlackRock Funds, not summed	78,343	0.24%	+27,376	Aug 31, 2026	BlackRock Funds, not summed
1.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	55,949	0.17%	+8,376	Jun 30, 2026	Quantitative Master Series LLC, not summed
1.5	iShares Core S&P Total U.S. Stock Market ETF Fund S000004317 · Registered fund · Jun 30, 2026 iShares Trust, not summed	40,447	0.12%	-5,630	Jun 30, 2026	iShares Trust, not summed
2	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,320,350	4.05%	+38,493	Jun 30, 2026	carried, not yet filed for the newest quarter
3	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,177,421	3.61%	+835,783	Jun 30, 2026	carried, not yet filed for the newest quarter
4	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,164,614	3.57%	+950,242	Jun 30, 2026	carried, not yet filed for the newest quarter
5	JANE STREET GROUP, LLC 13G CIK 1595888 · Unknown · Sep 30, 2026 Rule 13d-1(c), passive investor, not summed	1,076,577	3.30%	-571,946	Sep 30, 2026	Rule 13d-1(c), passive investor, not summed
5.1	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	753,523	2.31%	+476,478	Jun 30, 2026	carried, not yet filed for the newest quarter
6	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,006,830	3.09%	-1,135,809	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	FMR LLC 13G CIK 315066 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	1,006,830	3.09%	-1,135,808	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
6.2	Fidelity Small Cap Growth Fund Fund S000007193 · Registered fund · Jul 31, 2026 Fidelity Securities Fund, not summed	656,170	2.01%	-15,641	Jul 31, 2026	Fidelity Securities Fund, not summed
6.3	Fidelity Small Cap Growth K6 Fund Fund S000057285 · Registered fund · Jul 31, 2026 Fidelity Securities Fund, not summed	346,719	1.06%	+4,380	Jul 31, 2026	Fidelity Securities Fund, not summed
6.4	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	334,923	1.03%	+45,097	Jul 31, 2026	Fidelity Salem Street Trust, not summed
6.5	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	146,115	0.45%	-2,880	Aug 31, 2026	Fidelity Concord Street Trust, not summed
7	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	966,659	2.96%	+48,783	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	950,950	2.92%	+22,103	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
9	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Sep 30, 2026	893,060	2.74%	+17,555	Sep 30, 2026
10	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	810,036	2.48%	-452,007	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · Aug 31, 2026 Goldman Sachs ETF Trust, not summed	7,632	0.02%	+2,334	Aug 31, 2026	Goldman Sachs ETF Trust, not summed
10.2	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	4,647	0.01%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
10.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	43	0.00%	-482	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
11	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	732,547	2.25%	+542,208	Jun 30, 2026	carried, not yet filed for the newest quarter
12	VANGUARD INFORMATION TECHNOLOGY INDEX FUND Fund S000004452 · Registered fund · Aug 31, 2026 VANGUARD WORLD FUND, not summed	713,358	2.19%	+2,248	Aug 31, 2026	VANGUARD WORLD FUND, not summed
13	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	712,926	2.19%	+89,620	Jun 30, 2026	carried, not yet filed for the newest quarter
13.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	10,500	0.03%	+500	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
13.2	State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF Fund S000036082 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	1,358	0.00%	+153	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
13.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	773	0.00%	+105	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
13.4	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	148	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	670,758	2.06%	+451,949	Jun 30, 2026	carried, not yet filed for the newest quarter
15	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	507,035	1.55%	-842,316	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	T. Rowe Price New Horizons Fund, Inc. Fund S000002106 · Registered fund · Jun 30, 2026 T. ROWE PRICE NEW HORIZONS FUND, INC., not summed	328,543	1.01%	-488,848	Jun 30, 2026	T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
15.2	T. Rowe Price Small-Cap Stock Fund, Inc. Fund S000002120 · Registered fund · Jun 30, 2026 T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed	103,303	0.32%	—	Jun 30, 2026	T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed
15.3	T. Rowe Price Institutional Small-Cap Stock Fund Fund S000002094 · Registered fund · Jun 30, 2026 T. Rowe Price Equity Funds, Inc., not summed	55,647	0.17%	—	Jun 30, 2026	T. Rowe Price Equity Funds, Inc., not summed
15.4	T. Rowe Price Small-Cap Value Fund, Inc. Fund S000002121 · Registered fund · Jun 30, 2026 T. ROWE PRICE SMALL-CAP VALUE FUND, INC., not summed	49,956	0.15%	—	Jun 30, 2026	T. ROWE PRICE SMALL-CAP VALUE FUND, INC., not summed
15.5	T. Rowe Price Small-Cap Index Fund Fund S000051327 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	4,670	0.01%	+1,257	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
16	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	480,400	1.47%	+314,727	Jun 30, 2026	carried, not yet filed for the newest quarter
17	POSEDEL RHEA J Insider CIK 1055117 · Oct 20, 2026 Director, issuer-wide	447,145	1.37%	+18,000	Oct 20, 2026	Director, issuer-wide
18	NEXT CENTURY GROWTH INVESTORS LLC 13F CIK 1134007 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	410,731	1.26%	-344,006	Jun 30, 2026	carried, not yet filed for the newest quarter
19	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	400,732	1.23%	+259,441	Jun 30, 2026	carried, not yet filed for the newest quarter
20	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	382,738	1.17%	+372,527	Jun 30, 2026	carried, not yet filed for the newest quarter
21	AWM Investment Company, Inc. 13F CIK 1535264 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	374,808	1.15%	-1,219,163	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	AWM Investment Company, Inc. 13G CIK 1535264 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	374,808	1.15%	-1,213,128	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
22	Erickson Gayn Insider CIK 1364097 · Oct 27, 2026 Director, President and CEO, issuer-wide	349,033	1.07%	-851	Oct 27, 2026	Director, President and CEO, issuer-wide
23	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	339,037	1.04%	+15,430	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
24	T. Rowe Price Investment Management, Inc. 13F CIK 1897612 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	318,127	0.98%	+318,127	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	296,226	0.91%	+10,501	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	Invesco Dorsey Wright Technology Momentum ETF Fund S000013110 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	217,973	0.67%	-19,494	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
25.2	Invesco Dorsey Wright SmallCap Momentum ETF Fund S000037586 · Registered fund · Aug 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	51,238	0.16%	+7,781	Aug 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
26	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	277,020	0.85%	+24,862	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	15,479	0.05%	+2,167	Jun 30, 2026	Northern Funds, not summed
26.2	FlexShares Morningstar US Market Factor Tilt Index Fund Fund S000033312 · Registered fund · Jul 31, 2026 FlexShares Trust, not summed	474	0.00%	—	Jul 31, 2026	FlexShares Trust, not summed
27	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,512	0.76%	+13,973	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · Aug 31, 2026 SCHWAB STRATEGIC TRUST, not summed	140,730	0.43%	+2,325	Aug 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	74,585	0.23%	+10,168	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
27.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · Aug 31, 2026 SCHWAB STRATEGIC TRUST, not summed	17,964	0.06%	+1,964	Aug 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	17,643	0.05%	+1,900	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
27.5	Schwab Small-Cap Equity Fund Fund S000005516 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	9,818	0.03%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
28	Science & Technology Partners, L.P. 13F CIK 2029433 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,000	0.76%	+249,000	Jun 30, 2026	carried, not yet filed for the newest quarter
29	LORD, ABBETT & CO. LLC 13F CIK 728100 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	247,640	0.76%	+68,351	Jun 30, 2026	carried, not yet filed for the newest quarter
29.1	LORD ABBETT DEVELOPING GROWTH FUND INC Fund S000006834 · Registered fund · Jul 31, 2026 LORD ABBETT DEVELOPING GROWTH FUND, INC., not summed	218,617	0.67%	—	Jul 31, 2026	LORD ABBETT DEVELOPING GROWTH FUND, INC., not summed
29.2	Lord Abbett Micro-Cap Growth Fund Fund S000007142 · Registered fund · Jul 31, 2026 LORD ABBETT SECURITIES TRUST, not summed	69,289	0.21%	-951	Jul 31, 2026	LORD ABBETT SECURITIES TRUST, not summed
30	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	238,453	0.73%	+85,568	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Driehaus Capital Management LLC 13F CIK 938206 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	238,422	0.73%	+238,422	Jun 30, 2026	carried, not yet filed for the newest quarter
31.1	Driehaus Micro Cap Growth Fund Fund S000042829 · Registered fund · Jun 30, 2026 Driehaus Mutual Funds, not summed	37,520	0.12%	—	Jun 30, 2026	Driehaus Mutual Funds, not summed
32	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	212,881	0.65%	+15,715	Jun 30, 2026	carried, not yet filed for the newest quarter
33	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	204,550	0.63%	+156,357	Jun 30, 2026	carried, not yet filed for the newest quarter
34	BAILLIE GIFFORD & CO 13F CIK 1088875 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	203,878	0.63%	-797,140	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Trexquant Investment LP 13F CIK 1633445 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	201,892	0.62%	+201,892	Jun 30, 2026	carried, not yet filed for the newest quarter
36	ROGERS VERNON Insider CIK 1756642 · Oct 27, 2026 Exec VP of Sales & Mktg., issuer-wide	186,682	0.57%	-197	Oct 27, 2026	Exec VP of Sales & Mktg., issuer-wide
37	RICHMOND DONALD P. II Insider CIK 1736207 · Oct 27, 2026 CTO, issuer-wide	186,583	0.57%	-145	Oct 27, 2026	CTO, issuer-wide
38	JPMorgan Small Cap Growth Fund Fund S000003859 · Registered fund · Jun 30, 2026 JPMorgan Trust II, not summed	184,704	0.57%	—	Jun 30, 2026	JPMorgan Trust II, not summed
39	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · Aug 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	175,419	0.54%	+24,924	Aug 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
40	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	169,123	0.52%	-77,640	Jun 30, 2026	carried, not yet filed for the newest quarter
41	NEUBERGER BERMAN GROUP LLC 13F CIK 1465109 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	167,664	0.51%	+167,664	Jun 30, 2026	carried, not yet filed for the newest quarter
41.1	Neuberger Small Cap Growth Fund Fund S000007839 · Registered fund · Aug 31, 2026 NEUBERGER BERMAN EQUITY FUNDS, not summed	32,096	0.10%	+4,881	Aug 31, 2026	NEUBERGER BERMAN EQUITY FUNDS, not summed
42	BARD ASSOCIATES INC 13F CIK 1105907 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	156,900	0.48%	-22,227	Jun 30, 2026	carried, not yet filed for the newest quarter
43	KADENSA CAPITAL Ltd 13F CIK 1720980 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	155,299	0.48%	+155,299	Jun 30, 2026	carried, not yet filed for the newest quarter
44	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	145,612	0.45%	+139,295	Jun 30, 2026	carried, not yet filed for the newest quarter
45	BERKSHIRE CAPITAL HOLDINGS INC 13F CIK 1133742 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	142,640	0.44%	+142,640	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	Berkshire Focus Fund Fund S000004886 · Registered fund · Jun 30, 2026 BERKSHIRE FUNDS, not summed	142,640	0.44%	—	Jun 30, 2026	BERKSHIRE FUNDS, not summed
46	SLAYEN HOWARD T Insider CIK 1203324 · Aug 14, 2026 Director, issuer-wide	140,667	0.43%	-5,700	Aug 14, 2026	Director, issuer-wide
47	NEW YORK STATE COMMON RETIREMENT FUND 13F CIK 810265 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	138,047	0.42%	+76,465	Jun 30, 2026	carried, not yet filed for the newest quarter
48	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	134,500	0.41%	+134,500	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Penn Capital Management Company, LLC 13F CIK 1158202 · Registered investment adviser · Sep 30, 2026	132,194	0.41%	-18,353	Sep 30, 2026
50	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	121,056	0.37%	+64,256	Jun 30, 2026	carried, not yet filed for the newest quarter

33 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 404 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 1040470 CUSIP 00760J108 13F (30d) 142 filings 117 filers Visit website Investor relations