--- title: "Monolithic Power Systems revenue hit $1.2 billion, then its 10-Q marked disclosure controls ineffective" description: "The record quarter filed October 29 was followed on November 3 by a quarterly report that marks disclosure controls ineffective, and by cash paid for buybacks and dividends faster than the quarter generated it." publisher: "The Inference" section: "Chips" published: 2026-11-05T16:20:44.771Z modified: 2026-11-05T16:20:44.771Z canonical: https://theinference.org/article/monolithic-power-systems-revenue-hit-1-2-billion-then-its-10-q-marked-disclosure-controls-ineffective language: en keywords: "Monolithic Power Systems, Earnings, Disclosure Controls, Material Weakness, Semiconductors" --- # Monolithic Power Systems revenue hit $1.2 billion, then its 10-Q marked disclosure controls ineffective > The record quarter filed October 29 was followed on November 3 by a quarterly report that marks disclosure controls ineffective, and by cash paid for buybacks and dividends faster than the quarter generated it. [Monolithic Power Systems](https://theinference.org/markets/companies/monolithic-power-systems) makes the power-management chips that feed electricity to AI data centers, servers, cars and enterprise hardware, and on October 29 it filed its best quarter yet in its [earnings-day 8-K](https://www.stocktitan.net/sec-filings/MPWR/8-k-monolithic-power-systems-inc-reports-material-event-42a90d456feb.html), the filing that carries results to the market: revenue of $1,202.4 million, up 63.1% from a year earlier and the company's first quarter above $1 billion, net income of $271.1 million, and fourth-quarter guidance of $1,315 million to $1,385 million [1][2]. Five days later came the other half. [The 10-Q, its quarterly regulatory report filed November 3](https://www.stocktitan.net/sec-filings/MPWR/10-q-monolithic-power-systems-inc-quarterly-earnings-report-596c5dbed9c7.html), states that disclosure controls were ineffective as of September 30, and that a material weakness in deferred-tax accounting remained unremediated [1]. A material weakness is a significant flaw in the systems and checks that keep financial reports accurate, the kind of hole that could let errors or fraud go uncaught [1]. Management promises a fix by fiscal year-end 2026, "no assurance" included [1]. ## The controls behind a 73-times-earnings price are marked ineffective The market is paying roughly 73 times earnings for these figures, about $59.5 billion of market value, with the latest analyst call a Buy at a $1,500 target [3]. Miss the December 31 deadline and the weakness stays open across the fiscal year the annual report covers, the 10-K; the auditor's opinion on internal control over financial reporting in that 10-K would then record the flaw, and source [1] names what follows: reduced trust, potential regulatory action, possible corrections to reported numbers. The new chief financial officer, Tony Balow, a 23-year [Intel](https://theinference.org/markets/companies/intel) finance veteran, was appointed October 27 [2]. He succeeded Robert Dean, who had served as interim CFO from February 2026 to October 2026 [2]. Balow's first filing cycle is the one carrying the ineffective statement, and the 8-K lists remediating the weakness as a risk factor [2]. ## Cash went out about 1.6 times faster than it came in Third-quarter operating cash flow was $289.9 million [1][2]. Against that, the company spent $453.4 million buying back its own stock, 362,000 shares at an average $1,251.32, raised the dividend to $2.00 from $1.56, and added $500 million of fresh buyback authorization for a $1 billion program, all drawn against $1,091.2 million of cash on hand [1][2]. *Chart: **Q3 buybacks ran about 1.6 times the quarter's operating cash flow** Bar chart comparing Q3 2026 stock repurchases of $453.4 million against Q3 2026 operating cash flow of $289.9 million and Q2 2026 repurchases of $4.0 million.* *Millions of US dollars, Monolithic Power Systems quarterly figures from its 8-K (October 29, 2026) and 10-Q (November 3, 2026) filings. Sources: [1][2]. [1][2]* ## What to watch, and when The counterpoint is real: Enterprise Data revenue of $506.7 million grew 164.6% year over year, and capacity is being built toward $10 billion of annual revenue support [2]. That growth is the reason the market has tolerated a 73-times multiple so far [2]. But the investor question now has a date: remediate by December 31 and the growth story stands on clean controls; slip, and the annual report carries the flaw into the opinion on the numbers behind that multiple [2]. The 10-K due in early 2027 is the tell [2]. For the AI-rack growth floor behind this quarter, read our October 30, 2026, piece, "[Monolithic Power Systems posts its first $1 billion quarter, raises its AI rack growth floor to 150%.](https://theinference.org/article/monolithic-power-systems-posts-its-first-1-billion-quarter-raises-its-ai-rack-growth-floor-to-150)" ## Takeaway Monolithic Power filed its best quarter ever on October 29, then marked its disclosure controls ineffective five days later; the December 31 remediation deadline now sits under a 73-times-earnings valuation. ## Sources 1. [StockTitan, Monolithic Power Systems Q3 revenue climbs 63.1% (MPWR 10-Q), 3 November 2026](https://www.stocktitan.net/sec-filings/MPWR/10-q-monolithic-power-systems-inc-quarterly-earnings-report-596c5dbed9c7.html) 2. [StockTitan, Monolithic Power Systems Q3 revenue rises 63.1% (MPWR 8-K with Q3 earnings commentary), 29 October 2026](https://www.stocktitan.net/sec-filings/MPWR/8-k-monolithic-power-systems-inc-reports-material-event-42a90d456feb.html) 3. [TipRanks via The Globe and Mail, Monolithic Power Strengthens Financial Leadership With New CFO, 30 October 2026](https://www.theglobeandmail.com/investing/markets/stocks/MPWR/pressreleases/8563424/monolithic-power-strengthens-financial-leadership-with-new-cfo/) --- Monolithic Power Systems revenue hit $1.2 billion, then its 10-Q marked disclosure controls ineffective — The Inference. Canonical: https://theinference.org/article/monolithic-power-systems-revenue-hit-1-2-billion-then-its-10-q-marked-disclosure-controls-ineffective