Company · Ownership research

BEL FUSE INC /NJ BELFB

CIK 0000729580

Form 4 transactions dated Nov 1, 2023 to Nov 10, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through Sep 15, 2026.

Insider purchases & sales

Purchased: $12.43K
Sold: $19.99M

Nov 1, 2023 – Sep 15, 2026
Available records · partial months are marked ·

202510 of 12 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 12, 2025	Hutkin Lynn Chief Financial Officer	Sale	$848.39K 5,000 shares sold	17.95% sold Direct holding	▾
Nov 18, 2025	BERNSTEIN DANIEL Director · 10% owner	Sale	$96.11K 677 shares sold	2.30% sold Direct holding	▾
Nov 18, 2025	Lai Kenneth Koon Keung VP of Asia Operations	Sale	$80.07K 564 shares sold	6.78% sold Direct holding	▾
Nov 18, 2025	Berry Joseph VP, Pres of Magnetic Solutions	Sale	$16.89K 119 shares sold	0.67% sold Direct holding	▾
Nov 17, 2025	BERNSTEIN DANIEL Director · 10% owner	Sale	$335.05K 2,323 shares sold	7.32% sold Direct holding	▾
Nov 17, 2025	Lai Kenneth Koon Keung VP of Asia Operations	Sale	$279.23K 1,936 shares sold	18.88% sold Direct holding	▾
Nov 17, 2025	Berry Joseph VP, Pres of Magnetic Solutions	Sale	$58.85K 408 shares sold	2.23% sold Direct holding	▾
Aug 1, 2025	Lai Kenneth Koon Keung VP of Asia Operations	Sale	$243.20K 1,900 shares sold	15.63% sold Direct holding	▾
Jul 31, 2025	Dawson Stephen Pres. - Power Solutions	Sale	$152.48K 1,200 shares sold	7.76% sold Direct holding	▾
Jun 13, 2025	Lai Kenneth Koon Keung VP of Asia Operations	Sale	$336.12K 4,000 shares sold	24.76% sold Direct holding	▾

Showing 12 / 12 record groups in 2025. The complete set is available through the API.

BEL FUSE INC /NJ · BELFB

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 12 of 12 purchase / sale groups and 18 of 18 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"BELFB","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.