Bel Fuse Inc.
US ˙ NasdaqGS ˙ US0773472016

SecurityBELFA / Bel Fuse Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership7,177 shares
Latest Disclosed Value $ 1,293,295
UBS Group AG reports 7.10% increase in ownership of BELFA / Bel Fuse Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 7,177 shares of Bel Fuse Inc. (US:BELFA) valued at $1,293,295 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 6,701 shares of Bel Fuse Inc.. This represents a change in shares of 7.10% during the quarter. The current value of the position is $1,784,059 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)
2026-05-05 2026-03-31 13F BEL FUSE CL A 077347201 7,177 476 7.10 1,293 27.14 0.0000
2026-01-29 2025-12-31 13F BEL FUSE CL A 077347201 6,701 1,930 40.45 1,017 83.24 0.0000
2025-11-13 2025-09-30 13F BEL FUSE CL A 077347201 4,771 -1,396 -22.64 555 0.18 0.0001
2025-08-14 2025-06-30 13F BEL FUSE CL A 077347201 6,167 -2,755 -30.88 554 -13.71 0.0001
2025-05-13 2025-03-31 13F BEL FUSE CL A 077347201 8,922 -1,772 -16.57 643 -33.33 0.0001
2025-02-14 2024-12-31 13F BEL FUSE CL A 077347201 10,694 6,574 159.56 963 135.45 0.0002
2024-11-14 2024-09-30 13F BEL FUSE CL A 077347201 4,120 -204 -4.72 410 17.19 0.0001
2024-08-14 2024-06-30 13F BEL FUSE CL A 077347201 4,324 -1,518 -25.98 350 -15.50 0.0001
2024-05-13 2024-03-31 13F BEL FUSE CL A 077347201 5,842 2,680 84.76 414 102.45 0.0001
2024-02-09 2023-12-31 13F BEL FUSE CL A 077347201 3,162 -641 -16.86 204 15.91 0.0001
2023-11-09 2023-09-30 13F BEL FUSE CL A 077347201 3,803 278 7.89 177 -13.73 0.0001
2023-08-11 2023-06-30 13F BEL FUSE CL A 077347201 3,525 -154 -4.19 204 53.38 0.0001
2023-05-12 2023-03-31 13F BEL FUSE CL A 077347201 3,679 2,891 366.88 134 1,008.33 0.0000
2022-02-14 2021-12-31 13F BEL FUSE CL A 077347201 788 427 118.28 12 140.00 0.0000
2021-11-15 2021-09-30 13F BEL FUSE CL A 077347201 361 260 257.43 5 150.00 0.0000
2021-05-12 2021-03-31 13F BEL FUSE CL A 077347201 101 -874 -89.64 2 -71.43 0.0000
2020-05-01 2020-03-31 13F BEL FUSE CL A 077347201 975 -230 -19.09 7 -65.00 0.0000
2020-02-14 2019-12-31 13F BEL FUSE CL A 077347201 1,205 752 166.00 20 233.33 0.0000
2019-11-14 2019-09-30 13F BEL FUSE CL A 077347201 453 181 66.54 6 50.00 0.0000
2019-08-14 2019-06-30 13F BEL FUSE CL A 077347201 272 -68 -20.00 4 -42.86 0.0000
2019-05-14 2019-03-31 13F BEL FUSE CL A 077347201 340 67 24.54 7 75.00 0.0000
2019-02-14 2018-12-31 13F BEL FUSE CL A 077347201 273 -506 -64.96 4 -75.00 0.0000
2018-11-14 2018-09-30 13F BEL FUSE CL A 077347201 779 -115 -12.86 16 -15.79 0.0000
2018-08-14 2018-06-30 13F BEL FUSE CL A 077347201 894 1 0.11 19 26.67 0.0000
2018-05-15 2018-03-31 13F BEL FUSE CL A 077347201 893 -14 -1.54 15 -25.00 0.0000
2018-02-14 2017-12-31 13F BEL FUSE CL A 077347201 907 -49 -5.13 20 -23.08 0.0000
2017-11-14 2017-09-30 13F BEL FUSE CL A 077347201 956 890 1,348.48 26 1,200.00 0.0000
2017-11-14 2017-03-31 13F/A-1 BEL FUSE CL A 077347201 66 -333 -83.46 2 -80.00 0.0000
2017-05-12 2017-03-31 13F BEL FUSE CL A 077347201 66 -333 2
2017-02-14 2016-12-31 13F BEL FUSE CL A 077347201 399 329 470.00 10 900.00 0.0000
2016-02-16 2015-12-31 13F BEL FUSE CL A 077347201 70 -384 -84.58 1 -87.50 0.0000
2015-11-13 2015-09-30 13F BEL FUSE CL A 077347201 454 -203 -30.90 8 -33.33 0.0000
2015-08-14 2015-06-30 13F BEL FUSE CL A 077347201 657 274 71.54 12 71.43 0.0000
2015-05-14 2015-03-31 13F BEL FUSE CL A 077347201 383 87 29.39 7 0.00 0.0000
2015-02-17 2014-12-31 13F BEL FUSE CL A 077347201 296 296 7 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.