Monolithic Power Systems is a fabless analog/power-IC leader whose chips regulate the voltage feeding AI accelerators, servers and optical modules. Five straight earnings beats, an enterprise-data segment that nearly doubled year-over-year, a Q2 guide of $900M (+35% YoY) well above consensus Investing.com· mai 2026, and a debt-free, net-cash balance sheet. The only thing keeping this off an A+ is honest: a forward P/E near 62 leaves zero margin for error.
Trend, momentum and the balance sheet are pristine. Two things hold the grade at A. First, valuation: a forward P/E of ~62 (PEG ~1.8 on +35% growth) is growth-justified but expensive, and removes the margin of safety that an A+ requires. Second, an accounting-quality flag: in February 2026 the audit committee determined that FY2024 and all four 2025 quarterly statements should no longer be relied upon and will be restated for a non-cash deferred-tax error SEC 8-K Item 4.02· fév 2026. It was self-identified, non-cash and left non-GAAP results intact — not fraud — but an active restatement is not "pristine earnings quality." We grade what we see.
Monolithic Power Systems is a fabless semiconductor company specialising in high-performance power management integrated circuits — the chips that convert and regulate the voltage delivered to processors, memory, and peripherals. Its proprietary BCD (Bipolar-CMOS-DMOS) process and monolithic integration pack more power into less board space with higher efficiency than competing discrete solutions.
The growth engine today is Enterprise Data — power modules and vertical-power-delivery solutions feeding AI accelerators (GPUs/ASICs) and 800G optical modules. That segment nearly doubled year-over-year (+97.7%) to $262.8M in Q1'26 MLQ· mai 2026. MPWR also serves Storage & Computing, Automotive, Communications, Consumer and Industrial markets — a diversified base that smooths cyclicality while the AI tailwind does the heavy lifting.
The moat is real: deep design-win relationships, multi-year sockets, a vertically integrated supply chain, and a track record of being first-to-market with new power topologies. The company is debt-free and self-funds R&D and capacity from operating cash flow StockAnalysis· juin 2026.
| Metric | Value | Signal |
|---|---|---|
| Revenue (TTM) | $2.96B | +23.9% YoY |
| Net Income (TTM) | $679.7M | Profitable |
| EPS (TTM) | $13.97 | Growing |
| Gross Margin | 55.1% | Healthy |
| Operating Margin | 26.8% | Strong |
| Net Margin | 23.0% | Strong |
| ROE | 18.9% | Solid |
| Cash + ST Inv. | $1.37B | Net cash |
| Total Debt | $0.0 | Debt-free |
| Fwd P/E | 61.7x | Nosebleed |
| Trailing P/E | 112.9x | Very rich |
| Analyst Target | $1,797 | +13.9% |
This is a high-quality compounder: ~24% net margins, 18.9% ROE, zero debt and ~$1.37B of net cash Simply Wall St· juin 2026. The catch is price: at ~62x forward earnings the market is paying a steep premium for ~35% near-term growth (PEG ~1.8). The price is the main catch — but note one accounting caveat. GAAP earnings were hit by a restatement: in Feb 2026 the audit committee flagged FY2024 and the 2025 quarters as non-reliable, restating a ~$195M non-cash deferred-tax item SEC 8-K· fév 2026. That distortion is what inflates the trailing P/E to ~113; the forward multiple is the cleaner gauge. Revenue and non-GAAP margins were unaffected, but a recent non-reliance determination is a genuine governance flag — see Risk Analysis.
For a name riding the AI wave, the cap table here is unusually clean — the opposite of the toxic-financing setups we screen for. Verified directly against SEC filings:
No shelf, no ATM, no convertibles, no warrants, no toxic financiers, no reverse split. The company is debt-free with ~$1.37B of net cash, an active buyback and a growing dividend. This is one of the cleanest cap tables in our coverage GlobeNewswire· buyback.
| Last Price | $1,577.32 |
| RSI (14) | 51.5 |
| EMA 20 | $1,567.03 |
| EMA 50 | $1,491.46 |
| EMA 200 | $1,185.43 |
| ATR (14) | $94.72 |
| Extension vs EMA20 | +0.7% |
Textbook bullish structure: EMA20 ($1,567) > EMA50 ($1,491) > EMA200 ($1,185) with wide separation, price riding just above the 20-day. RSI at 51.5 is neutral — the stock is not extended (only +0.7% above EMA20), which is exactly what you want for an entry: trend intact, momentum cooled off, room to run back to and through the 52-week high at $1,714 toward fresh all-time highs StockAnalysis· juin 2026. ATR of ~$95 (6% of price) sets the risk envelope — the rising EMA20 less 1×ATR defines a natural stop near $1,472.
Five consecutive beats, with the most recent quarter pairing an EPS surprise with a guide that blew past consensus — the kind of consistency that earns a premium multiple.
| Quarter | EPS Actual | EPS Est. | Surprise | Result |
|---|---|---|---|---|
| Q1 2026 | $5.10 | $4.90 | +4.1% | Beat |
| Q4 2025 | $4.79 | $4.74 | +1.1% | Beat |
| Q3 2025 | $4.73 | $4.62 | +2.4% | Beat |
| Q2 2025 | $4.21 | $4.12 | +2.2% | Beat |
| Q1 2025 | $4.04 | $4.00 | +1.0% | Beat |
Q1'26 delivered $804.2M revenue (+26.1% YoY, beating the ~$782M estimate) and $5.10 EPS vs $4.90 StockTitan 8-K· mai 2026. More importantly, management guided Q2'26 to $900M — roughly +35% YoY and ~10% above the Street — driven by AI server power and optical-module demand Investing.com call· mai 2026. The next print is the catalyst; it is also the single biggest risk if it merely meets rather than beats.
Balance-sheet and dilution risk are near-zero. The risks that matter: valuation (at ~62x forward, priced for perfection, with beta 1.69 amplifying any AI-trade unwind) and a recent accounting restatement / non-reliance flag plus heavy insider selling.
MPWR trades at a nosebleed multiple because the market is paying up for a rare combination: a debt-free, cash-rich compounder with ~24% net margins that happens to be a direct beneficiary of the AI power build-out. The quality justifies a premium — but at ~62x forward, the premium has eaten the margin of safety. That is precisely why this is an A and not an A+, and why the trade below uses a tight, ATR-defined stop.
Buy a debt-free, net-cash power-IC leader on a non-extended pullback into a rising EMA20, with the AI server/optical tailwind accelerating into the next print. The structure is clean (EMA20 > EMA50 > EMA200), the entry is at/just-below spot, and the stop sits a full ATR below the 20-day so normal noise won't shake you out. The R/R is 2.0 to TP1 and 3.5 to TP2 — well above our 1.5 minimum. The honest caveat: at ~62x forward, this is a momentum-quality swing, not a value entry — respect the stop.
Horizon: swing (multi-week into the next earnings catalyst). Given beta 1.69 and a ~$95 ATR, size to the dollar risk per share ($100.28 from entry to stop), not to conviction — that keeps the position survivable through a high-beta wobble while leaving full upside to the $1,714 prior high and beyond.
This analysis is provided for informational and educational purposes only. It does not constitute financial advice, investment recommendation, or solicitation to buy or sell any security.
Past performance is not indicative of future results. All investments involve risk, including the possible loss of principal. Always conduct your own research and consult a licensed financial advisor before making investment decisions.
Data sourced from Yahoo Finance, StockAnalysis.com, SEC EDGAR, and public market data as of 14 June 2026. Accuracy is not guaranteed.