One Stop Systems, Inc.
US ˙ NasdaqCM ˙ US68247W1099

SecurityOSS / One Stop Systems, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership46,974 shares
Latest Disclosed Value $ 355,593
Northern Trust Corp reports 12.05% increase in ownership of OSS / One Stop Systems, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 46,974 shares of One Stop Systems, Inc. (US:OSS) valued at $355,593 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 41,923 shares of One Stop Systems, Inc.. This represents a change in shares of 12.05% during the quarter. The current value of the position is $893,445 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 ONE STOP SYS COM 68247W109 46,974 5,051 12.05 356 17.94 0.0000
2026-02-17 2025-12-31 13F ONE STOP SYS COM 68247W109 41,923 6,000 16.70 301 56.77 0.0000
2025-11-14 2025-09-30 13F ONE STOP SYS COM 68247W109 35,923 -8,366 -18.89 193 22.29 0.0000
2025-08-13 2025-06-30 13F ONE STOP SYS COM 68247W109 44,289 4,630 11.67 157 70.65 0.0000
2025-05-13 2025-03-31 13F ONE STOP SYS COM 68247W109 39,659 7,653 23.91 92 -14.02 0.0000
2025-02-14 2024-12-31 13F ONE STOP SYS COM 68247W109 32,006 -11,583 -26.57 107 2.88 0.0000
2024-11-13 2024-09-30 13F ONE STOP SYS COM 68247W109 43,589 0 0.00 104 -0.95 0.0000
2024-08-14 2024-06-30 13F ONE STOP SYS COM 68247W109 43,589 7,787 21.75 105 -9.48 0.0000
2024-05-14 2024-03-31 13F ONE STOP SYS COM 68247W109 35,802 7,912 28.37 117 100.00 0.0000
2024-02-13 2023-12-31 13F ONE STOP SYS COM 68247W109 27,890 0 0.00 59 13.73 0.0000
2023-11-13 2023-09-30 13F ONE STOP SYS COM 68247W109 27,890 0 0.00 52 -36.25 0.0000
2023-08-11 2023-06-30 13F ONE STOP SYS COM 68247W109 27,890 0 0.00 80 15.94 0.0000
2023-05-15 2023-03-31 13F ONE STOP SYS COM 68247W109 27,890 2,800 11.16 69 -8.00 0.0000
2023-02-13 2022-12-31 13F ONE STOP SYS COM 68247W109 25,090 0 0.00 76 -6.25 0.0000
2022-11-14 2022-09-30 13F ONE STOP SYS COM 68247W109 25,090 1,279 5.37 80 -14.89 0.0000
2022-08-12 2022-06-30 13F ONE STOP SYS COM 68247W109 23,811 -1,160 -4.65 94 -1.05 0.0000
2022-05-13 2022-03-31 13F ONE STOP SYS COM 68247W109 24,971 0 0.00 95 -23.39 0.0000
2022-02-08 2021-12-31 13F ONE STOP SYS COM 68247W109 24,971 0 0.00 124 -1.59 0.0000
2021-11-15 2021-09-30 13F ONE STOP SYS COM 68247W109 24,971 0 0.00 126 -13.10 0.0000
2021-08-13 2021-06-30 13F ONE STOP SYS COM 68247W109 24,971 0 0.00 145 -8.23 0.0000
2021-05-12 2021-03-31 13F ONE STOP SYS COM 68247W109 24,971 13,827 124.08 158 251.11 0.0000
2021-02-11 2020-12-31 13F ONE STOP SYS COM 68247W109 11,144 0 0.00 45 95.65 0.0000
2020-11-16 2020-09-30 13F ONE STOP SYS COM 68247W109 11,144 0 0.00 23 4.55 0.0000
2020-08-14 2020-06-30 13F ONE STOP SYS COM 68247W109 11,144 0 0.00 22 37.50 0.0000
2020-05-14 2020-03-31 13F ONE STOP SYS COM 68247W109 11,144 0 0.00 16 -30.43 0.0000
2020-02-14 2019-12-31 13F ONE STOP SYS COM 68247W109 11,144 0 0.00 23 -30.30 0.0000
2019-11-13 2019-09-30 13F ONE STOP SYS COM 68247W109 11,144 11,144 33 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.