Granahan Investment Management Reduces Stake in Bel Fuse Inc.

The investment firm sold over 21,000 shares of the electronics manufacturer in Q3 2025.

Mar. 16, 2026 at 10:39am

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Granahan Investment Management LLC reduced its holdings in Bel Fuse Inc. (NASDAQ:BELFB) by 19.8% during the third quarter of 2025, according to a recent 13F filing with the Securities and Exchange Commission (SEC). The firm now owns 87,310 shares of the electronics maker's stock, down from 108,912 shares previously.

Why it matters

Bel Fuse is a major manufacturer of electronic components used in a variety of industries, including telecommunications, data communications, consumer electronics, and automotive. Tracking institutional investor activity in the stock can provide insights into market sentiment and potential future performance.

The details

Granahan Investment Management sold 21,602 shares of Bel Fuse during the third quarter, reducing its stake in the company to 0.69% of the total shares outstanding. Several other large investors also adjusted their positions in Bel Fuse during the period, with Jones Financial Companies Lllp and Federated Hermes Inc. both increasing their holdings.

  • Granahan Investment Management filed its Q3 2025 13F report in mid-March 2026.

The players

Granahan Investment Management LLC

An investment management firm that focuses on small-cap and mid-cap equities.

Bel Fuse Inc.

A global manufacturer of electronic components for power, data, and video applications.

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The takeaway

The reduction in Granahan Investment Management's stake in Bel Fuse could signal a shift in market sentiment around the electronics manufacturer, though the overall institutional ownership remains relatively high at 58.39% of the company's shares.