X0508 4 2026-02-25 0000729580 BEL FUSE INC /NJ BELFB 0001839914 Tuweiq Farouq Salem Ali C/O BEL FUSE INC. 300 EXECUTIVE DRIVE, SUITE 300 WEST ORANGE NJ 07052 1 1 President and CEO 0 Class A Common Stock 2026-02-25 4 S 0 2169 215.65 D 931 D Class A Common Stock 2026-02-25 4 S 0 887 217.13 D 44 D Class A Common Stock 2026-02-25 4 S 0 44 218.45 D 0 D Class B Common Stock 2026-02-25 4 S 0 4997 235.75 D 56707 D Class B Common Stock 2026-02-25 4 S 0 3 236.84 D 56704 D Class B Common Stock 2026-02-25 4 S 0 6028 233.88 D 50676 D Class B Common Stock 2026-02-25 4 S 0 4695 234.68 D 45981 D Class B Common Stock 2026-02-25 4 S 0 3222 235.81 D 42759 D Class B Common Stock 2026-02-25 4 S 0 9362 237.05 D 33397 D Class B Common Stock 2026-02-25 4 S 0 2496 237.78 D 30901 D Class B Common Stock 2026-02-25 4 S 0 64 238.40 D 30837 D Class A Common Stock 1449 I by 401(k) plan This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $215.62 to $216.56, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $216.92 to $217.75, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $218.43 to $218.46, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $233.28 to $234.26, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $234.28 to $235.22, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (5) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $235.35 to $236.30, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (6) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $236.40 to $237.38, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (7) to this Form 4. This price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $237.40 to $238.32, inclusive. The reporting person undertakes to provide to Bel Fuse Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (8) to this Form 4. The number of shares held in the 401(k) Plan is estimated. /s/ Lloyd Jeglikowski, Attorney-in-Fact 2026-02-26