Aehr Test Systems, Inc.
DE ˙ DB ˙ US00760J1088
95,60 € ↑2,10 (2,25%)
2026-06-05
AKTIENPREIS
SecurityDE:AYB / Aehr Test Systems, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership165,673 shares
Latest Disclosed Value $ 6,143,155
Morgan Stanley reports 32.32% decrease in ownership of AYB / Aehr Test Systems, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 165,673 shares of Aehr Test Systems, Inc. (DE:AYB) valued at $5,019,892 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 244,783 shares of Aehr Test Systems, Inc.. This represents a change in shares of -32.32% during the quarter. The current value of the position is $15,838,339 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AEHR TEST SYS COM 00760J108 165,673 -79,110 -32.32 6,143 24.30 0.0004
2026-05-27 2025-12-31 13F/A-1 AEHR TEST SYS COM 00760J108 244,783 155,516 174.21 4,942 83.92 0.0003
2026-02-13 2025-12-31 13F AEHR TEST SYS COM 00760J108 244,783 155,516 4,942 0.0003
2026-05-27 2025-09-30 13F/A-1 AEHR TEST SYS COM 00760J108 89,267 -113,928 -56.07 2,688 2.28 0.0002
2025-11-14 2025-09-30 13F AEHR TEST SYS COM 00760J108 89,267 -113,928 2,688 0.0002
2025-08-15 2025-06-30 13F AEHR TEST SYS COM 00760J108 203,195 23,804 13.27 2,627 100.99 0.0002
2025-05-15 2025-03-31 13F AEHR TEST SYS COM 00760J108 179,391 -100,961 -36.01 1,308 -71.96 0.0001
2025-05-15 2024-12-31 13F/A-1 AEHR TEST SYS COM 00760J108 280,352 78,178 38.67 4,662 79.51 0.0003
2025-02-14 2024-12-31 13F AEHR TEST SYS COM 00760J108 280,352 78,178 4,662 0.0003
2025-05-14 2024-09-30 13F/A-2 AEHR TEST SYS COM 00760J108 202,174 43,725 27.60 2,598 46.81 0.0002
2025-02-14 2024-09-30 13F/A-1 AEHR TEST SYS COM 00760J108 202,174 43,725 2,598 0.0002
2024-11-14 2024-09-30 13F AEHR TEST SYS COM 00760J108 202,174 43,725 2,598 0.0002
2025-05-14 2024-06-30 13F/A-2 AEHR TEST SYS COM 00760J108 158,449 -249,848 -61.19 1,770 -65.05 0.0001
2024-10-17 2024-06-30 13F/A-1 AEHR TEST SYS COM 00760J108 158,449 -249,848 1,770 0.0001
2024-08-14 2024-06-30 13F AEHR TEST SYS COM 00760J108 158,449 -249,848 1,770 0.0001
2024-10-17 2024-03-31 13F/A-2 AEHR TEST SYS COM 00760J108 408,297 182,691 80.98 5,063 -15.42 0.0004
2024-08-16 2024-03-31 13F/A-1 AEHR TEST SYS COM 00760J108 408,297 182,691 5,063 0.0004
2024-05-15 2024-03-31 13F AEHR TEST SYS COM 00760J108 408,297 182,691 5,063 0.0004
2024-08-16 2023-12-31 13F/A-1 AEHR TEST SYS COM 00760J108 225,606 -336,726 -59.88 5,985 -76.71 0.0005
2024-02-13 2023-12-31 13F AEHR TEST SYS COM 00760J108 225,606 -336,726 5,985 0.0005
2023-11-15 2023-09-30 13F AEHR TEST SYS COM 00760J108 562,332 125,075 28.60 25,699 42.48 0.0026
2023-08-14 2023-06-30 13F AEHR TEST SYS COM 00760J108 437,257 51,354 13.31 18,037 50.68 0.0018
2023-05-15 2023-03-31 13F AEHR TEST SYS COM 00760J108 385,903 41,423 12.02 11,971 72.88 0.0013
2023-02-14 2022-12-31 13F AEHR TEST SYS COM 00760J108 344,480 221,983 181.22 6,924 300.69 0.0008
2022-11-14 2022-09-30 13F AEHR TEST SYS COM 00760J108 122,497 47,199 62.68 1,728 206.38 0.0002
2022-10-27 2022-06-30 13F/A-1 AEHR TEST SYS COM 00760J108 75,298 -87,261 -53.68 564 -65.86 0.0001
2022-08-15 2022-06-30 13F AEHR TEST SYS COM 00760J108 75,298 -87,261 564 0.0001
2022-10-27 2022-03-31 13F/A-1 AEHR TEST SYS COM 00760J108 162,559 54,277 50.13 1,652 -36.90 0.0002
2022-05-13 2022-03-31 13F AEHR TEST SYS COM 00760J108 162,559 54,277 1,652 0.0002
2022-02-14 2021-12-31 13F AEHR TEST SYS COM 00760J108 108,282 -9,272 -7.89 2,618 63.22 0.0003
2021-11-15 2021-09-30 13F AEHR TEST SYS COM 00760J108 117,554 113,354 2,698.90 1,604 13,266.67 0.0002
2021-08-23 2021-06-30 13F/A-1 AEHR TEST SYS COM 00760J108 4,200 0 0.00 12 9.09 0.0000
2021-08-16 2021-06-30 13F AEHR TEST SYS COM 00760J108 4,200 0 12 0.0000
2021-05-17 2021-03-31 13F AEHR TEST SYS COM 00760J108 4,200 0 0.00 11 0.00 0.0000
2021-02-16 2020-12-31 13F AEHR TEST SYS COM 00760J108 4,200 0 0.00 11 83.33 0.0000
2020-11-13 2020-09-30 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 6 -25.00 0.0000
2020-08-14 2020-06-30 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 8 14.29 0.0000
2020-05-26 2020-03-31 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 7 -12.50 0.0000
2020-05-15 2020-03-31 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 7 0.5377
2020-02-14 2019-12-31 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 8 0.00 0.0000
2019-11-14 2019-09-30 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 8 14.29 0.0000
2019-08-14 2019-06-30 13F AEHR TEST SYSTEMS COM 00760J108 4,200 0 0.00 7 16.67 0.0000
2019-05-15 2019-03-31 13F AEHR TEST SYSTEMS COM 00760J108 4,200 -2,008 -32.35 6 -33.33 0.0000
2019-02-14 2018-12-31 13F AEHR TEST SYSTEMS COM 00760J108 6,208 -305 -4.68 9 -35.71 0.0000
2019-04-23 2018-09-30 13F/A-2 AEHR TEST SYSTEMS COM 00760J108 6,513 -4,762 -42.24 14 -48.15 0.0000
2018-11-20 2018-09-30 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 6,513 0 14 0.0000
2018-11-14 2018-09-30 13F AEHR TEST SYSTEMS COM 00760J108 6,513 -4,762 14
2019-04-23 2018-06-30 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 11,275 -726 -6.05 27 0.00 0.0000
2018-08-14 2018-06-30 13F AEHR TEST SYSTEMS COM 00760J108 11,275 -726 27
2019-04-23 2018-03-31 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 12,001 -1,668 -12.20 27 -27.03 0.0000
2018-05-14 2018-03-31 13F AEHR TEST SYSTEMS COM 00760J108 12,001 -1,668 27
2019-04-23 2017-12-31 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 13,669 -3,000 -18.00 37 -45.59 0.0000
2018-02-14 2017-12-31 13F AEHR TEST SYSTEMS COM 00760J108 13,669 -3,000 37
2017-11-14 2017-09-30 13F AEHR TEST SYSTEMS COM 00760J108 16,669 1,000 6.38 68 15.25 0.0000
2017-08-11 2017-06-30 13F AEHR TEST SYSTEMS COM 00760J108 15,669 -10,600 -40.35 59 -53.17 0.0000
2017-05-22 2017-03-31 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 26,269 6,600 33.56 126 162.50 0.0000
2017-05-12 2017-03-31 13F AEHR TEST SYSTEMS COM 00760J108 26,269 126
2017-02-22 2016-12-31 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 19,669 0 0.00 48 -23.81 0.0000
2017-02-13 2016-12-31 13F AEHR TEST SYSTEMS COM 00760J108 19,669 48
2016-11-10 2016-09-30 13F AEHR TEST SYSTEMS COM 00760J108 19,669 0 0.00 63 103.23 0.0000
2016-08-12 2016-06-30 13F AEHR TEST SYSTEMS COM 00760J108 19,669 -19 -0.10 31 34.78 0.0000
2016-05-12 2016-03-31 13F AEHR TEST SYSTEMS COM 00760J108 19,688 -3 -0.02 23 -37.84 0.0000
2016-02-09 2015-12-31 13F AEHR TEST SYSTEMS COM 00760J108 19,691 -2,005 -9.24 37 -33.93 0.0000
2016-02-08 2015-09-30 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 21,696 -3,159 -12.71 56 0.00 0.0000
2015-11-09 2015-09-30 13F AEHR TEST SYSTEMS COM 00760J108 21,696 56
2015-08-12 2015-06-30 13F AEHR TEST SYSTEMS COM 00760J108 24,855 20,670 493.91 56 460.00 0.0000
2015-05-14 2015-03-31 13F AEHR TEST SYSTEMS COM 00760J108 4,185 1,033 32.77 10 25.00 0.0000
2015-02-13 2014-12-31 13F AEHR TEST SYSTEMS COM 00760J108 3,152 2,300 269.95 8 300.00 0.0000
2014-12-16 2014-09-30 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 852 0 0.00 2 0.00 0.0000
2014-11-14 2014-09-30 13F AEHR TEST SYSTEMS COM 00760J108 852 2
2014-08-12 2014-06-30 13F AEHR TEST SYSTEMS COM 00760J108 852 -683 -44.50 2 -50.00 0.0000
2014-05-13 2014-03-31 13F AEHR TEST SYSTEMS COM 00760J108 1,535 1,535 4 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.