Monolithic Power Systems stock falls after Nvidia AI deal doubts and strong Q2 surge
Published on 09/15/2026 at 10:16 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Monolithic Power Systems stock (ISIN US6098391054) came under pressure on September 14, 2026, with the shares sliding around 7 percent even after a strong second quarter that saw revenue jump to USD 980.6 million, up 47.6 percent year on year and beating analyst expectations by 8.6 percent, according to Yahoo Finance.
Stock reacts to Nvidia AI platform uncertainty
Investor sentiment toward Monolithic Power Systems shifted after a research note suggested the company may lose its supplier slot on Nvidia’s next-generation Blackwell AI GPU platform because of performance concerns, as reported by TipRanks on September 14, 2026.
According to TipRanks, the report from Edgewater Research raised doubts about Monolithic Power Systems’ future share of Nvidia’s Blackwell AI platform, contributing to heightened volatility in the stock and making the potential loss of a marquee AI customer a key short-term risk.
Q2 2026 results show strong growth despite the selloff
Fundamentally, Monolithic Power Systems delivered one of the strongest quarterly performances among its semiconductor peers in the second quarter of 2026, with revenue reaching USD 980.6 million and growing 47.6 percent compared with the same period a year earlier, according to Yahoo Finance.
The company also beat analysts’ revenue expectations by 8.6 percent in Q2 2026, signaling robust demand for its analog and mixed-signal power management chips and a clear operating outperformance versus consensus, as highlighted by Yahoo Finance.
Despite these strong figures, Monolithic Power Systems stock was down 5.7 percent since reporting its Q2 2026 results and recently traded at about USD 1,241 per share before the latest drop, reflecting a market view that near-term risk around major AI customers can outweigh headline growth metrics, according to Yahoo Finance.
Recent price action and valuation context
On September 14, 2026, Monolithic Power Systems stock fell 7.39 percent to close at USD 1,143.24 on Nasdaq, underperforming broader indices as the S&P 500 slipped 0.48 percent and the Dow Jones Industrial Average declined 0.29 percent, as reported by MarketWatch.
According to MarketWatch, the closing price of USD 1,143.24 on September 14, 2026 left the stock 33.30 percent below its 52-week high of USD 1,714.09, which was reached on May 26, 2026, indicating that the current level is significantly off the peak the shares achieved earlier in the year.
Separately, valuation metrics from GuruFocus on September 14, 2026 show Monolithic Power Systems trading at USD 1,143.24, which the service estimates to be about 10.4 percent below its GF Value of USD 1,275.45, suggesting some upside relative to this intrinsic value model despite the recent decline.
Sector backdrop and volatility drivers
The selloff in Monolithic Power Systems stock coincided with broader weakness in high-valuation semiconductor names, with the Philadelphia Semiconductor Index dropping 5.86 percent on September 14, 2026, highlighting a sector-wide risk-off move that amplified individual company catalysts, as noted in regional market coverage from Asia.
Intraday data cited by a Taiwanese financial portal on September 14, 2026 showed Monolithic Power Systems trading around USD 1,158.70 during the session, down 6.14 percent with an intraday high of USD 1,185.89 and a low of USD 1,156.00 on volume of 143,653 shares, underlining the elevated volatility and strong trading activity around the stock on that day.
Monolithic Power Systems stock price as of the last close
As of the most recent completed trading day, September 14, 2026, Monolithic Power Systems stock closed at USD 1,143.24 on Nasdaq, down 7.39 percent from the prior close and sitting 33.30 percent below its 52-week high of USD 1,714.09, providing investors with a clear view of how far the shares currently trade beneath their peak levels reported earlier in 2026.
Monolithic Power Systems stock details
- Company: Monolithic Power Systems Inc.
- ISIN: US6098391054
- Ticker: MPWR
- Trading venue: Nasdaq
- Price (as of September 14, 2026, 4:30): 1,143.24 USD
- Market capitalization: 60,670,000,000 USD (as of September 14, 2026)
- Sector / Industry: Semiconductors / Analog and mixed-signal power management
- Index membership: S&P 500
