SG Americas Securities LLC Boosts Stake in Monolithic Power Systems

Semiconductor company sees increased institutional investment in Q4 2025

Mar. 24, 2026 at 10:38am

SG Americas Securities LLC significantly increased its position in Monolithic Power Systems, Inc. (NASDAQ:MPWR) during the fourth quarter of 2025, according to a recent SEC filing. The fund now owns approximately 262,231 shares of the semiconductor company's stock, representing a 77,483.1% increase from the previous quarter.

Why it matters

Monolithic Power Systems is a leading designer and supplier of high-performance power management solutions, a rapidly growing segment of the semiconductor industry. The substantial increase in institutional investment from a firm like SG Americas Securities suggests strong confidence in the company's future prospects.

The details

According to the filing, SG Americas Securities now owns approximately 0.55% of Monolithic Power Systems, making it a significant shareholder. The fund added 261,893 shares during the fourth quarter, bringing its total position to 262,231 shares worth $237,676,000 as of the end of 2025.

  • SG Americas Securities LLC increased its position in Monolithic Power Systems during the fourth quarter of 2025.

The players

SG Americas Securities LLC

An investment management firm that has significantly increased its stake in Monolithic Power Systems.

Monolithic Power Systems, Inc.

A fabless semiconductor company that designs and supplies high-performance power management solutions.

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The takeaway

The substantial increase in institutional investment from a firm like SG Americas Securities suggests growing confidence in Monolithic Power Systems' ability to capitalize on the rising demand for power management solutions in the semiconductor industry.