Congress Asset Management Co. Boosts Stake in Rambus Inc.

The investment firm increased its holdings in the semiconductor company by 4.7% in the fourth quarter.

Mar. 24, 2026 at 8:37am

Congress Asset Management Co. grew its stake in Rambus, Inc. (NASDAQ:RMBS) by 4.7% in the 4th quarter, according to a recent 13F filing with the Securities and Exchange Commission (SEC). The institutional investor now owns 1,410,615 shares of the semiconductor company's stock, making it the 26th largest position in its portfolio.

Why it matters

Rambus is a major player in the semiconductor industry, providing technology licensing and solutions to companies worldwide. Congress Asset Management's increased stake suggests the firm sees long-term value in Rambus's business and intellectual property.

The details

Congress Asset Management acquired an additional 63,430 shares of Rambus during the fourth quarter, bringing its total holdings to approximately 1.31% of the company's outstanding stock. The firm cited Rambus's strong financial performance and growth potential as reasons for the increased investment.

  • Congress Asset Management filed its 13F report for the fourth quarter on March 24, 2026.

The players

Congress Asset Management Co.

An institutional investment firm that manages over $20 billion in assets for clients.

Rambus, Inc.

A semiconductor company that specializes in technology licensing and solutions for the electronics industry.

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The takeaway

Congress Asset Management's increased stake in Rambus suggests the firm sees long-term growth potential in the semiconductor company's technology and business model. This investment highlights the continued interest in Rambus among institutional investors.