MPWR
Monolithic Power Systems, Inc.
September 22, 2026 · intraday
- Rarity
- 1.29
- Peak move
- +8.50%
- Float cap
- $59.4B
Monolithic Power Systems is a fabless global company that designs and supplies high-performance, semiconductor-based power electronics solutions. It focuses on analog and mixed-signal power management integrated circuits for storage and computing, enterprise data, automotive, communications, consumer, and industrial applications. The company sells primarily through third-party distributors and value-added resellers to customers worldwide, with most revenue from Asia.
Where do you see this going?
no votes yetVoting closed at 4:00 PM ET.
What we found
8 events · 0 from SEC or newswire · 0 timed with the move- Key event
peer_disclosureAMD's market capitalization briefly crossed $1 trillion for the first time on September 21, 2026, with shares closing up about 9.95% near $610 after an intraday high of $613.92, making it the fourth US semiconductor company to reach the milestone.
- Key event
peer_disclosureThe Philadelphia Semiconductor Index rose 4.29% on September 21, 2026, a fifth straight session of gains, with Arm up over 17%, Intel up over 12%, Qualcomm up over 9%, Micron up 2.7% and Marvell up 5.4%.
- Key event
demand_signalMeta's AI agent app Muse, launched September 8, 2026, topped the US iOS free-app chart with over 2.5 million downloads by September 21 and 730,000 in its first five days, which Jefferies' Jacky He said lifts demand for server CPUs used in AI inference and orchestration.
peer_disclosureOn September 21, 2026, a sector-wide AI and semiconductor rally lifted the Philadelphia Semiconductor Index 4.3% and the Nasdaq Composite 2.26% to a record 27,122.09, with AMD rising about 10%.
peer_disclosureIntel is in talks with display-panel maker AUO Optronics on Micro LED substrate advanced packaging cooperation, exploring co-packaged optics and high-density computing chip integration, per reports on September 21, 2026; Intel shares rose over 12%.
analyst_ratingSeeking Alpha published a downgrade of Monolithic Power Systems (MPWR) to sell, citing a contraction in free cash flow margins (cash conversion of 55%) that it said does not justify the stock's premium valuation relative to TXN and ADI.
analyst_ratingWall Street Zen downgraded Monolithic Power Systems (NASDAQ:MPWR) to "hold" from "buy" in a research note issued Saturday, September 19, 2026, while the broader analyst consensus remained "Moderate Buy" with an average price target of $1,731.42.
regulatory_actionThe US ITC received a Section 337 complaint filed September 9, 2026 by Vicor Corporation alleging patent infringement in vertical power delivery systems, naming Monolithic Power Systems, Inc. of Kirkland, WA and Chengdu Monolithic Power Systems as respondents, with Vicor seeking a limited exclusion order and cease and desist orders.