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AEHR

Aehr Test Systems

Company with tickers: AEHR

CIK
1040470
CUSIP
00760J108
Shares Outstanding
31,453,254
13F Activity (30d)
169 filings 169 filers
Holders: 194
Total Value: $983,753,381
Total Shares: 26,530,569
Showing 1–100 of 213 holdings by value · page 1 of 3

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 194 13F filers · Δ vs Dec 31, 2025
Top Holder
8.6%
Jun 2023 → Mar 2026 · range 8.6% – 16.2%
−1.2 pts
Top 5
33.3%
Jun 2023 → Mar 2026 · range 30.9% – 53.9%
−6.9 pts
Top 10
52.9%
Jun 2023 → Mar 2026 · range 47.6% – 68.9%
−5.0 pts
HHI
373
Jun 2023 → Mar 2026 · range 324 – 706
Broadly held −84

Quarterly Activity

vs Dec 31, 2025
New
64
Increased
60
Decreased
49
Sold Out
23
Unchanged
21
Holder count: +41
Institutional value: +90.5%
Shares held: +3.7%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega PRICE T ROWE ASSOCIATES INC /MD/ +1,314,967 1,349,351
Mega GOLDMAN SACHS GROUP INC +1,086,001 1,262,043
Large Walleye Capital LLC +262,780 327,687
Mega Invesco Ltd. +257,506 285,725
Small GRATIA CAPITAL, LLC +211,000 748,560

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega WELLINGTON MANAGEMENT GROUP LLP −677,779 152,885
Small Halter Ferguson Financial Inc. −627,498 14,631
Mega CITADEL ADVISORS LLC −374,888 681,991
Mega FMR LLC −365,281 2,142,639
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −309,320 1,457,139

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,281,857 $47,531,257
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 917,876 $34,034,842
Large Caption Management, LLC 343,700 $12,744,396
Large Connor, Clark & Lunn Investment Management Ltd. 218,809 $8,113,437
Mega VANGUARD FIDUCIARY TRUST CO 197,166 $7,310,915

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 2,337,433 $47,192,770
Mid Sculptor Capital LP 600,000 $12,114,000
Large NATIONAL BANK OF CANADA /FI/ 206,011 $4,159,362
Large TWO SIGMA ADVISERS, LP 85,001 $1,716,170
Mega VICTORY CAPITAL MANAGEMENT INC 69,540 $1,404,012
Filter: New 64 Increased 60 Reduced 49 Sold out 23 Unchanged 21
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $84,798,210 8.62% 2,286,899
Mega FMR LLC $79,449,052 8.08% 2,142,639
Small AWM Investment Company, Inc. $59,104,444 6.01% 1,593,971
Mega PRICE T ROWE ASSOCIATES INC /MD/ $50,033,934 5.09% 1,349,351
Mega VANGUARD CAPITAL MANAGEMENT LLC $47,531,257 4.83% 1,281,857
Mega GOLDMAN SACHS GROUP INC $46,796,554 4.76% 1,262,043
Large BAILLIE GIFFORD & CO $37,117,746 3.77% 1,001,018
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $34,034,842 3.46% 917,876
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $30,279,528 3.08% 816,600
Mid NEXT CENTURY GROWTH INVESTORS LLC $27,985,647 2.84% 754,737
Mega GEODE CAPITAL MANAGEMENT, LLC $26,909,363 2.74% 725,711
Small GRATIA CAPITAL, LLC $25,844,760 2.63% 697,000
Mega STATE STREET CORP $23,112,186 2.35% 623,306
Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC $19,032,904 1.93% 513,293
Mid GILDER GAGNON HOWE & CO LLC $16,474,495 1.67% 444,296
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $16,259,580 1.65% 438,500
Mega CITADEL ADVISORS LLC $14,427,828 1.47% 389,100
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $12,764,678 1.30% 344,247
Large Caption Management, LLC $12,744,396 1.30% 343,700
Mega D. E. Shaw & Co., Inc. $12,667,937 1.29% 341,638
Mega Invesco Ltd. $10,594,680 1.08% 285,725
Mega JANE STREET GROUP, LLC $10,272,828 1.04% 277,045
Mid RICE HALL JAMES & ASSOCIATES, LLC $10,095,104 1.03% 272,252
Large Walleye Capital LLC $9,907,293 1.01% 267,187
Mega NORTHERN TRUST CORP Bank $9,350,015 0.95% 252,158
Mega UBS Group AG $9,149,971 0.93% 246,763
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $8,733,786 0.89% 235,539
Large Connor, Clark & Lunn Investment Management Ltd. $8,113,437 0.82% 218,809
Mega TWO SIGMA INVESTMENTS, LP $7,948,913 0.81% 214,372
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $7,491,605 0.76% 202,039
Mega VANGUARD FIDUCIARY TRUST CO Bank $7,310,915 0.74% 197,166
Mega JANE STREET GROUP, LLC $7,241,724 0.74% 195,300
Mega JPMORGAN CHASE & CO $7,057,768 0.72% 190,339
Large Point72 Asset Management, L.P. $6,922,836 0.70% 186,700
Large Point72 Asset Management, L.P. $6,722,604 0.68% 181,300
Large LORD, ABBETT & CO. LLC $6,648,036 0.68% 179,289
Small BARD ASSOCIATES INC $6,642,029 0.68% 179,127
Mega MORGAN STANLEY $6,143,152 0.62% 165,673
Mega WELLINGTON MANAGEMENT GROUP LLP $5,668,974 0.58% 152,885
Mega CITADEL ADVISORS LLC $5,621,328 0.57% 151,600
Mega CITADEL ADVISORS LLC $5,239,070 0.53% 141,291
Small Pier Capital, LLC $4,708,826 0.48% 126,991
Large OSAIC HOLDINGS, INC. $3,893,472 0.40% 105,002
Mega JANE STREET GROUP, LLC $3,889,692 0.40% 104,900
Mega MILLENNIUM MANAGEMENT LLC $3,708,000 0.38% 100,000
Mega MILLENNIUM MANAGEMENT LLC $3,553,228 0.36% 95,826
Large ExodusPoint Capital Management, LP $3,471,503 0.35% 93,622
Mega DIMENSIONAL FUND ADVISORS LP $3,449,810 0.35% 93,037
Mega Bank of New York Mellon Corp Bank $3,315,136 0.34% 89,405
Large PEAK6 LLC $3,155,508 0.32% 85,100
Mega D. E. Shaw & Co., Inc. $3,040,560 0.31% 82,000
Small Kultura Capital Management LP $2,973,816 0.30% 80,200
Small Penbrook Management LLC $2,948,416 0.30% 79,515
Large POLEN CAPITAL MANAGEMENT LLC $2,944,003 0.30% 79,396
Mid KENNEDY CAPITAL MANAGEMENT LLC $2,819,637 0.29% 76,042
Mega RAYMOND JAMES FINANCIAL INC $2,790,046 0.28% 75,244
Mid KLCM Advisors, Inc. $2,781,000 0.28% 75,000
Small Bouvel Investment Partners, LLC $2,663,233 0.27% 71,824
Mega CITIGROUP INC $2,628,972 0.27% 70,900
Mega Nuveen, LLC $2,608,837 0.27% 70,357
Small Johnson Financial Group, LLC $2,554,812 0.26% 68,900
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $2,283,460 0.23% 61,582
Large Kestra Advisory Services, LLC $2,228,508 0.23% 60,100
Mega UBS Group AG $2,224,800 0.23% 60,000
Mega ROYAL BANK OF CANADA Bank $2,222,536 0.23% 59,939
Mega Swiss National Bank Bank $2,132,100 0.22% 57,500
Mega BANK OF AMERICA CORP /DE/ Bank $2,106,143 0.21% 56,800
Mega BARCLAYS PLC $1,936,095 0.20% 52,214
Small GRATIA CAPITAL, LLC $1,911,844 0.19% 51,560
Mid IMC-Chicago, LLC $1,880,289 0.19% 50,709
Large Walleye Capital LLC $1,861,416 0.19% 50,200
Mid HERITAGE INVESTORS MANAGEMENT CORP $1,795,154 0.18% 48,413
Large TUDOR INVESTMENT CORP ET AL $1,786,996 0.18% 48,193
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,542,490 0.16% 41,599
Large Walleye Trading LLC $1,498,032 0.15% 40,400
Small LAUREL OAK WEALTH MANAGEMENT, LLC $1,433,883 0.15% 38,670
Mid ROYCE & ASSOCIATES LP $1,412,822 0.14% 38,102
Mega RHUMBLINE ADVISERS $1,365,767 0.14% 36,833
Mega ALLIANCEBERNSTEIN L.P. $1,350,453 0.14% 36,420
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,274,847 0.13% 34,381
Large Cambridge Investment Research Advisors, Inc. $1,171,728 0.12% 31,600
Large Universal- Beteiligungs- und Servicegesellschaft mbH $1,135,426 0.12% 30,621
Small Fortitude Advisory Group L.L.C. $1,063,528 0.11% 28,682
Large Quantinno Capital Management LP $1,057,521 0.11% 28,520
Small SANDLER CAPITAL MANAGEMENT $1,031,083 0.10% 27,807
Mega DEUTSCHE BANK AG\ Bank $990,888 0.10% 26,723
Small G2 Investment Partners Management LLC $927,000 0.09% 25,000
Mega Legal & General Group Plc $920,324 0.09% 24,820
Small SYMMETRY PEAK MANAGEMENT LLC $882,504 0.09% 23,800
Large Squarepoint Ops LLC $874,568 0.09% 23,586
Mega WELLS FARGO & COMPANY/MN $873,381 0.09% 23,554
Small Harvest Investment Services, LLC $861,294 0.09% 23,228
Large SEI INVESTMENTS CO $856,881 0.09% 23,109
Mid Brevan Howard Capital Management LP $844,497 0.09% 22,775
Small 12 West Capital Management LP $815,760 0.08% 22,000
Large STATE OF WISCONSIN INVESTMENT BOARD $813,498 0.08% 21,939
Small CLOUGH CAPITAL PARTNERS L P $812,014 0.08% 21,899
Mid HORIZON KINETICS ASSET MANAGEMENT LLC $800,928 0.08% 21,600
Mid Engineers Gate Manager LP $759,138 0.08% 20,473
Mega Vanguard Global Advisers, LLC $729,511 0.07% 19,674
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