Welcome to our dedicated page for Bel Fuse SEC filings (Ticker: BELFB), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Bel Fuse Inc (NASDAQ: BELFB) files periodic and current reports with the U.S. Securities and Exchange Commission that provide detailed information about its business as a manufacturer of products that power, protect and connect electronic circuits. Through its SEC filings, investors can review disclosures about the company’s Power Solutions and Protection, Connectivity Solutions and Magnetic Solutions product groups, and how these support end markets such as networking, telecommunications, computing, general industrial, high-speed data transmission, defense, commercial aerospace, transportation, eMobility, medical, broadcasting, automotive and consumer electronics.
On this page, you can access Bel Fuse’s annual reports on Form 10-K and quarterly reports on Form 10-Q, which typically include segment discussions, risk factors, information about international operations and commentary on trends affecting its electronic components business. Current reports on Form 8-K provide updates on material events, such as quarterly earnings releases, amendments to the company’s Code of Ethics, changes in the Board of Directors, and other significant corporate developments.
Bel Fuse’s filings also discuss topics such as its November 2024 acquisition of Enercon, its noncontrolling minority investment in innolectric AG and the expected impairment charge related to that investment, as well as the use of non-GAAP financial measures like Adjusted EBITDA and Non-GAAP EPS. These documents outline the adjustments made to GAAP results and the reasons the company provides these additional metrics.
Stock Titan’s SEC filings page for BELFB offers real-time access to new filings as they appear on EDGAR, along with AI-powered summaries that explain the key points of lengthy documents. Investors can quickly review 10-K and 10-Q highlights, understand the implications of 8-K events, and examine insider-related information reported on forms such as Form 4, all in one place.
Janus Henderson Group plc reported beneficial ownership of 619,337 shares of Bel Fuse Inc. Class B common stock, representing 5.9% of the class as of 12/31/2025. The shares are held across various managed portfolios advised by its asset manager subsidiaries.
Janus Henderson’s asset managers have shared power to vote and dispose of these shares, with no sole voting or dispositive power. The securities are held in the ordinary course of business, and the filing states they are not held for the purpose of changing or influencing control of Bel Fuse Inc.
T. Rowe Price Associates, Inc. reported beneficial ownership of 834,270 shares of Bel Fuse Inc. Class B common stock, representing 7.9% of the class as of the event date 12/31/2025.
T. Rowe Price has sole voting power over 822,941 shares and sole dispositive power over 834,261 shares, with no shared voting or dispositive authority. The firm states the position was acquired and is held in the ordinary course of business and not for the purpose of changing or influencing control of Bel Fuse. The filing also affirms that T. Rowe Price Associates denies being the beneficial owner of these securities beyond its investment advisory role.
Bel Fuse Inc. officer Thomas Smelker, President – Connectivity Solution, filed an initial ownership report as of 01/26/2026. The Form 3 states that he beneficially owns 0 shares of Class A Common Stock and 0 shares of Class B Common Stock, all reported as directly held.
Bel Fuse Inc.’s Class A common stock remains significantly held by investment firms associated with Mario Gabelli. The amended ownership report shows the group controls 123,600 shares, or 5.84% of the 2,115,263 Class A shares outstanding as of the quarter ended September 30, 2025.
The holdings are concentrated in GAMCO Asset Management Inc. with 59,200 shares (2.80%), Gabelli Funds LLC with 63,800 shares (3.02%), and MJG Associates Inc. with 600 shares (0.03%). Several related entities, including GAMCO Investors, GGCP, Associated Capital Group and Mario Gabelli personally, report zero direct beneficial ownership.
The group chooses to use the long-form Schedule 13D because its members may regularly communicate with Bel Fuse management and want these contacts to align with reporting obligations. Recent activity detailed in the filing shows multiple open-market sales of Bel Fuse Class A shares by Gabelli Funds and GAMCO during December 2025 and January 2026.
Christopher F. Bennett filed Amendment No. 3 to his Schedule 13D for Bel Fuse Inc., reporting beneficial ownership of 75,950 shares of Class A common stock, equal to approximately 3.59% of the outstanding Class A shares. The filing states Mr. Bennett used personal funds (about $3,090,962) to acquire the shares, which are currently held in margin accounts. The amendment reflects dispositions that caused him to cease being a beneficial owner of more than 5%. Mr. Bennett retains sole voting and dispositive power over the reported shares and states no related contracts or legal proceedings.
Amendment No. 2 to a Schedule 13D filed by Christopher F. Bennett reports his current holdings in Bel Fuse Inc. Class A common stock. Mr. Bennett beneficially owns 107,608 shares, representing 5.09% of the 2,115,263 shares outstanding referenced from the company report dated July 25, 2025. He used personal funds of approximately $3,090,962 to purchase the shares, which are held in margin accounts. The filing states he has sole voting and dispositive power over these shares and that this amendment reflects dispositions of shares relative to prior filings. No contractual arrangements with other parties regarding the securities are disclosed.
Bel Fuse Inc. (BELFB) Form 4 filing: VP of Asia Operations Kenneth Koon Keung Lai sold 1,900 Class B common shares on 08/01/2025 at $128 per share, a gross value of roughly $243k. Following the sale, Lai directly owns 10,255 Class B shares. No derivative transactions were reported and the 10b5-1 trading-plan box was left unchecked. The filing was signed on 08/04/2025 and involves only this single reporting person. The disposal represents an estimated 15.6 % reduction in his directly-held stake.