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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.
Bel Fuse Inc. announced that Peter Bittner III, Vice President and President of its Bel Connectivity Solutions division, will retire effective April 3, 2026. The board has appointed Thomas Smelker to succeed him as Vice President and President of Bel Connectivity Solutions starting January 26, 2026, with Bittner helping during a transition period.
Smelker brings nearly 30 years of experience, most recently as Senior Vice President of Mercury Systems’ Processing Technologies unit. Under his employment agreement, he will receive a $450,000 annual base salary, target annual variable compensation equal to 125% of base salary (payable 60% in cash and 40% in equity, subject to adjustment), and an annual performance share unit award with a target of 75% of base salary, based on performance goals.
The agreement also provides a one-time $1,050,000 signing bonus, split between equity and a $450,000 cash payment, plus potential relocation reimbursement and up to $5,000 in legal fee reimbursement. If he is terminated without cause or resigns for good reason, he is eligible for salary continuation, pro-rata bonus, continued vesting of most equity, and health benefits, with enhanced cash severance, bonus, and full equity vesting if such a termination occurs within 24 months after a change in control.
Bel Fuse Inc.’s chief financial officer reported selling Class B common stock in several transactions on 12/12/2025.
The report shows sales of 2,521 shares at a weighted average price of $168.71, 1,079 shares at $169.49, 700 shares at $171.39, and 700 shares at $171.74 per share, with each lot executed across multiple trades within stated price ranges.
After these sales, the officer directly owned 22,848 shares of Class B common stock and indirectly held an estimated 2,942 shares of Class A common stock and 132 shares of Class B common stock through a 401(k) plan.
Bel Fuse Inc. director and 10% owner reported sales of Class B common stock in mid‑November 2025. On 11/17/2025, the insider sold 2,323 Class B shares at a weighted average price of $144.2328, and on 11/18/2025 sold 677 Class B shares at a weighted average price of $141.9649. The prices reflect multiple trades in ranges from $139.84 to $148.72 and from $138.46 to $144.27, respectively.
After these transactions, the insider directly owns 28,750 Class B shares and 376,095 Class A shares, plus indirect holdings of 4,265 Class B shares through a spouse and an estimated 6,169 Class A shares in a 401(k) plan.
Bel Fuse Inc. reported an insider stock sale by its VP of Asia Operations, who is an officer of the company. According to the Form 4, the officer sold 1,936 shares of Class B common stock on 11/17/2025 at a weighted average price of $144.2328 per share, followed by a sale of 564 shares on 11/18/2025 at a weighted average price of $141.9649 per share. After these transactions, the officer beneficially owned 7,755 shares of Bel Fuse Class B common stock, held directly. The prices reflect multiple trades within stated ranges, and detailed breakdowns are available upon request from the company or the SEC staff.
Bel Fuse Inc. officer and VP, President of Magnetic Solutions reported open-market sales of Class B Common Stock. On 11/17/2025, the insider sold 408 Class B shares at a weighted average price of $144.2328, and on 11/18/2025 sold an additional 119 Class B shares at a weighted average price of $141.9649.
After these transactions, the reporting person directly beneficially owned 17,774 Class B shares. They also indirectly held an estimated 1,360 Class B shares and 2,751 Class A shares through a 401(k) plan. The prices reflect multiple trades within disclosed ranges, and detailed trade breakdowns are available upon request as stated in the footnotes.
Bel Fuse Inc. director and 10% owner reports share transfer
A reporting person of Bel Fuse Inc. (Class B common, BELFB) filed a Form 4 after a transaction on 11/12/2025. The filing shows a transaction coded "G," indicating a gift of 257 shares of Class B common stock at a reported price of $0. After this transfer, the reporting person directly holds 31,750 Class B shares. In addition, the filing reports 4,265 Class B shares held indirectly by the reporting person’s spouse, 376,095 Class A shares held directly, and an estimated 6,169 Class A shares held indirectly through a 401(k) plan.