DOSSIER · 13F Holders · Q2 2026Healthcare · Instruments For Meas & Testing of Electricity & Elec Signals
AEHR

AEHR TEST SYS

274 institutions still hold AEHR TEST SYS as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 00760J108·Instruments For Meas & Testing of Electricity & Elec Signals·274 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$1.7B
visible holders
Holders
274
filers reporting
Concentration
14.76%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

Nearly the entire institutional register of Aehr Test Systems (AEHR) is new: six of its 10 reporting holders arrived in Q2 2026, in a base worth just $2.9 million in total reported value. Y-Intercept (Hong Kong) Ltd is the largest holder by a wide margin at $1.2 million, or 41.3% of all institutional value, followed by B. Riley Wealth Advisors (16.3%) and Winthrop Partners (9.6%) — both also new positions. Combined, the six new entrants (Y-Intercept, B. Riley, Winthrop Partners, Brookstone Capital Management, Wealth Enhancement Advisory Services, and TEMA ETFs) account for roughly 87% of all institutional value in the stock, meaning almost the entire visible institutional ownership base appeared in a single quarter. Among the four pre-existing holders, CoreCap Advisors was the standout buyer, more than tripling its stake (+241.8% in shares, a real $85,013 addition), while GAMMA Investing and Versant Capital Management both trimmed modestly.

An almost entirely new holder base

Six of the ten reporting institutions are brand-new positions this quarter: Y-Intercept (Hong Kong) Ltd ($1.2 million, 41.3% of total institutional value — the largest holder outright), B. Riley Wealth Advisors ($469,112, 16.3%), Winthrop Partners ($277,037, 9.6%), Brookstone Capital Management ($252,446, 8.8%), Wealth Enhancement Advisory Services ($212,791, 7.4%), and TEMA ETFs ($88,759). Together, these six new holders represent roughly 87% of the stock's entire institutional value — an unusually concentrated wave of first-time ownership for a name that apparently had almost no institutional footprint the prior quarter.

Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$255M2.7M0.00%Q2 2026
02
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$193M2.0M0.01%Q2 2026
03
CITADEL ADVISORS LLC
CIK 0001423053
$171M1.8M0.02%Q2 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$127M1.3M0.00%Q2 2026
05
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$113M1.2M0.08%Q2 2026
06
FMR LLC
CIK 0000315066
$97M1.0M0.00%Q2 2026
07
Vanguard Portfolio Management
CIK 0002100121· Index
$93M967K0.00%Q2 2026
08
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$84M876K0.00%Q2 2026
09
GOLDMAN SACHS GROUP INC
CIK 0000886982
$78M810K0.01%Q2 2026
10
JPMORGAN CHASE & CO
CIK 0000019617
$70M733K0.00%Q2 2026
11
STATE STREET CORP
CIK 0000093751
$68M713K0.00%Q2 2026
12
Connor, Clark & Lunn Investment Management Ltd.
CIK 0001596800
$64M671K0.12%Q2 2026
13
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$50M1.3M0.01%Q1 2026
14
Caption Management, LLC
CIK 0001706766
$47M489K0.22%Q2 2026
15
MORGAN STANLEY
CIK 0000895421
$46M480K0.00%Q2 2026
16
NEXT CENTURY GROWTH INVESTORS LLC
CIK 0001134007
$39M411K2.09%Q2 2026
17
MARSHALL WACE, LLP
CIK 0001318757
$37M383K0.03%Q2 2026
18
AWM Investment Company, Inc.
CIK 0001535264
$36M375K3.12%Q2 2026
19
UBS Group AG
CIK 0001610520
$34M349K0.00%Q2 2026
20
Invesco Ltd.
CIK 0000914208
$28M296K0.00%Q2 2026
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Insiders at AEHR TEST SYS
Wimmers DidierSiu ChrisRogers VernonEngineer AdilPosedel Rhea JSlayen Howard TSalamone AlbertoErickson Gayn