Aehr Test Systems, Inc.
DE ˙ DB ˙ US00760J1088
95,60 € ↑2,10 (2,25%)
2026-06-05
AKTIENPREIS
SecurityDE:AYB / Aehr Test Systems, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership252,158 shares
Latest Disclosed Value $ 9,350,020
Northern Trust Corp reports 5.12% increase in ownership of AYB / Aehr Test Systems, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 252,158 shares of Aehr Test Systems, Inc. (DE:AYB) valued at $7,640,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 239,872 shares of Aehr Test Systems, Inc.. This represents a change in shares of 5.12% during the quarter. The current value of the position is $24,106,305 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)
2026-05-14 2026-03-31 13F AEHR TEST SYS COM 00760J108 252,158 12,286 5.12 9,350 93.06 0.0003
2026-02-17 2025-12-31 13F AEHR TEST SYS COM 00760J108 239,872 9,137 3.96 4,843 -30.29 0.0001
2025-11-14 2025-09-30 13F AEHR TEST SYS COM 00760J108 230,735 -92,408 -28.60 6,947 66.28 0.0002
2025-08-13 2025-06-30 13F AEHR TEST SYS COM 00760J108 323,143 79,079 32.40 4,178 134.85 0.0006
2025-05-13 2025-03-31 13F AEHR TEST SYS COM 00760J108 244,064 -6,272 -2.51 1,779 -57.27 0.0003
2025-02-14 2024-12-31 13F AEHR TEST SYS COM 00760J108 250,336 19,401 8.40 4,163 40.31 0.0006
2024-11-13 2024-09-30 13F AEHR TEST SYS COM 00760J108 230,935 970 0.42 2,968 15.54 0.0005
2024-08-14 2024-06-30 13F AEHR TEST SYS COM 00760J108 229,965 -17,628 -7.12 2,569 -16.35 0.0004
2024-05-14 2024-03-31 13F AEHR TEST SYS COM 00760J108 247,593 -4,733 -1.88 3,070 -54.14 0.0005
2024-02-13 2023-12-31 13F AEHR TEST SYS COM 00760J108 252,326 8,268 3.39 6,694 -39.98 0.0012
2023-11-13 2023-09-30 13F AEHR TEST SYS COM 00760J108 244,058 2,074 0.86 11,153 11.74 0.0022
2023-08-11 2023-06-30 13F AEHR TEST SYS COM 00760J108 241,984 188,105 349.12 9,982 497.31 0.0019
2023-05-15 2023-03-31 13F AEHR TEST SYS COM 00760J108 53,879 -2,289 -4.08 1,671 48.14 0.0003
2023-02-13 2022-12-31 13F AEHR TEST SYS COM 00760J108 56,168 12,930 29.90 1,129 84.92 0.0002
2022-11-14 2022-09-30 13F AEHR TEST SYS COM 00760J108 43,238 1,798 4.34 610 96.14 0.0001
2022-08-12 2022-06-30 13F AEHR TEST SYS COM 00760J108 41,440 0 0.00 311 -26.13 0.0001
2022-05-13 2022-03-31 13F AEHR TEST SYS COM 00760J108 41,440 3,036 7.91 421 -54.68 0.0001
2022-02-08 2021-12-31 13F AEHR TEST SYS COM 00760J108 38,404 -4,865 -11.24 929 57.19 0.0002
2021-11-15 2021-09-30 13F AEHR TEST SYS COM 00760J108 43,269 7,759 21.85 591 503.06 0.0001
2021-08-13 2021-06-30 13F AEHR TEST SYS COM 00760J108 35,510 0 0.00 98 10.11 0.0000
2021-05-12 2021-03-31 13F AEHR TEST SYS COM 00760J108 35,510 389 1.11 89 0.00 0.0000
2021-02-11 2020-12-31 13F AEHR TEST SYS COM 00760J108 35,121 2,141 6.49 89 93.48 0.0000
2020-11-16 2020-09-30 13F AEHR TEST SYSTEMS COM 00760J108 32,980 -1,602 -4.63 46 -32.35 0.0000
2020-08-14 2020-06-30 13F AEHR TEST SYSTEMS COM 00760J108 34,582 0 0.00 68 17.24 0.0000
2020-05-14 2020-03-31 13F AEHR TEST SYSTEMS COM 00760J108 34,582 -825 -2.33 58 -18.31 0.0000
2020-02-14 2019-12-31 13F AEHR TEST SYSTEMS COM 00760J108 35,407 -111 -0.31 71 10.94 0.0000
2019-11-13 2019-09-30 13F AEHR TEST SYSTEMS COM 00760J108 35,518 -200 -0.56 64 8.47 0.0000
2019-08-13 2019-06-30 13F AEHR TEST SYSTEMS COM 00760J108 35,718 0 0.00 59 18.00 0.0000
2019-05-13 2019-03-31 13F AEHR TEST SYSTEMS COM 00760J108 35,718 0 0.00 50 -1.96 0.0000
2019-02-12 2018-12-31 13F AEHR TEST SYSTEMS COM 00760J108 35,718 0 0.00 51 -35.44 0.0000
2018-11-14 2018-09-30 13F AEHR TEST SYSTEMS COM 00760J108 35,718 0 0.00 79 -5.95 0.0000
2018-09-18 2018-06-30 13F/A-1 AEHR TEST SYSTEMS COM 00760J108 35,718 0 0.00 84 5.00 0.0000
2018-08-14 2018-06-30 13F AEHR TEST SYSTEMS COM 00760J108 35,718 0 84
2018-05-09 2018-03-31 13F AEHR TEST SYSTEMS COM 00760J108 35,718 -300 -0.83 80 -17.53 0.0000
2018-02-14 2017-12-31 13F AEHR TEST SYSTEMS COM 00760J108 36,018 871 2.48 97 -32.64 0.0000
2017-11-13 2017-09-30 13F AEHR TEST SYSTEMS COM 00760J108 35,147 6,361 22.10 144 33.33 0.0000
2017-08-11 2017-06-30 13F AEHR TEST SYSTEMS COM 00760J108 28,786 0 0.00 108 -21.74 0.0000
2017-05-12 2017-03-31 13F AEHR TEST SYSTEMS COM 00760J108 28,786 28,786 138 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.