Bel Fuse Inc.

SecurityBELFB / Bel Fuse Inc.
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership17,798 shares
Latest Disclosed Value $ 1,738,686
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series ownership in BELFB / Bel Fuse Inc.

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 17,798 shares of Bel Fuse Inc. (US:BELFB) valued at $1,738,687 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 17,798 shares of Bel Fuse Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $4,673,043 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)
2025-08-26 2025-06-30 NP Bel Fuse EC US0773473006 17,798 0 0.00 1,739 30.48 0.0390
2025-05-28 2025-03-31 NP Bel Fuse EC US0773473006 17,798 -41 -0.23 1,332 -9.45 0.0320
2025-02-25 2024-12-31 NP Bel Fuse EC US0773473006 17,839 -2,774 -13.46 1,471 -9.09 0.0321
2024-11-26 2024-09-30 NP Bel Fuse EC US0773473006 20,613 988 5.03 1,618 26.41 0.0306
2024-08-26 2024-06-30 NP Bel Fuse EC US0773473006 19,625 834 4.44 1,280 12.97 0.0261
2024-05-28 2024-03-31 NP Bel Fuse EC US0773473006 18,791 0 0.00 1,133 -9.65 0.0236
2024-02-26 2023-12-31 NP Bel Fuse EC US0773473006 18,791 837 4.66 1,255 46.50 0.0268
2023-11-28 2023-09-30 NP Bel Fuse EC US0773473006 17,954 0 0.00 857 -16.89 0.0224
2023-08-25 2023-06-30 NP Bel Fuse EC US0773473006 17,954 1,661 10.19 1,031 217.90 0.0244
2021-05-27 2021-03-31 NP Bel Fuse EC US0773473006 16,293 0 0.00 324 32.79 0.0073
2021-02-25 2020-12-31 NP Bel Fuse EC US0773473006 16,293 0 0.00 245 40.23 0.0063
2020-11-25 2020-09-30 NP Bel Fuse EC US0773473006 16,293 0 0.00 174 0.00 0.0056
2020-08-27 2020-06-30 NP Bel Fuse EC US0773473006 16,293 1,490 10.07 175 20.83 0.0057
2020-06-01 2020-03-31 NP Bel Fuse EC US0773473006 14,803 0 0.00 144 -52.48 0.0059
2020-02-27 2019-12-31 NP Bel Fuse EC 077347300 14,803 345 2.39 303 39.63 0.0091
2019-11-27 2019-09-30 NP Bel Fuse EC US0773473006 14,458 14,458 217 0.0072
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.