Exhibit 99.1

PRESS RELEASE For Immediate Release

Monolithic Power Systems Announces

Results for the Third Quarter Ended September 30, 2023

KIRKLAND, WASHINGTON, October 30, 2023-- Monolithic Power Systems, Inc. (“MPS”) (Nasdaq: MPWR), a fabless company with a global footprint that provides high-performance, semiconductor-based power electronic solutions, today announced financial results for the quarter and nine months ended September 30, 2023.

The financial results for the quarter ended September 30, 2023 were as follows:

The financial results for the nine months ended September 30, 2023 were as follows:

The following is a summary of revenue by end market (in thousands):

The following is a summary of revenue by product family (in thousands):

“While we expect visibility to remain limited in the short term, which was the same as last quarter, we continue to execute on our long-term strategy,” said Michael Hsing, CEO and founder of MPS.

Business Outlook

The following are MPS’s financial targets for the fourth quarter ending December 31, 2023:

(1) Non-GAAP net income, non-GAAP net income per share, non-GAAP gross margin, non-GAAP operating expenses, non-GAAP other income, net, non-GAAP operating income and non-GAAP income before income taxes differ from net income, net income per share, gross margin, operating expenses, other income (expense), net, operating income and income before income taxes determined in accordance with Generally Accepted Accounting Principles in the United States (“GAAP”). Non-GAAP net income and non-GAAP net income per share exclude the effect of stock-based compensation expense, net deferred compensation plan expense (income), amortization of purchased intangible assets and related tax effects. Non-GAAP gross margin excludes the effect of stock-based compensation expense and deferred compensation plan expense (income). Non-GAAP operating expenses exclude the effect of stock-based compensation expense, amortization of purchased intangible assets and deferred compensation plan income (expense). Non-GAAP other income, net excludes the effect of deferred compensation plan expense (income). Non-GAAP operating income excludes the effect of stock-based compensation expense, amortization of purchased intangible assets and deferred compensation plan expense (income). Non-GAAP income before income taxes excludes the effect of stock-based compensation expense, amortization of purchased intangible assets and net deferred compensation plan expense (income). Projected non-GAAP gross margin excludes the effect of stock-based compensation expense. Projected non-GAAP operating expenses exclude the effect of stock-based compensation expense. These non-GAAP financial measures are not prepared in accordance with GAAP and should not be considered as a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP. A schedule reconciling non-GAAP financial measures is included at the end of this press release. MPS utilizes both GAAP and non-GAAP financial measures to assess what it believes to be its core operating performance and to evaluate and manage its internal business and assist in making financial operating decisions. MPS believes that the inclusion of non-GAAP financial measures, together with GAAP measures, provides investors with an alternative presentation useful to investors’ understanding of MPS’s core operating results and trends. Additionally, MPS believes that the inclusion of non-GAAP measures, together with GAAP measures, provides investors with an additional dimension of comparability to similar companies. However, investors should be aware that non-GAAP financial measures utilized by other companies are not likely to be comparable in most cases to the non-GAAP financial measures used by MPS.

Earnings Webinar

MPS plans to host a Zoom webinar covering its financial results at 2:00 p.m. PT / 5:00 p.m. ET, October 30, 2023. You can access the webinar at: https://mpsic.zoom.us/j/92277996429. The webinar will be archived and available for replay for one year under the Investor Relations page on the MPS website.

Safe Harbor Statement

This press release contains, and statements that will be made during the accompanying webinar will contain, forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including under the sections “Business Outlook” and the quote from our CEO herein, including, among other things, (i) projected revenue, GAAP and non-GAAP gross margin, GAAP and non-GAAP operating expenses, stock-based compensation expenses, interest and other income, and fully diluted shares outstanding, (ii) our outlook for the fourth quarter of fiscal year 2023 and the near-term, medium-term and long-term prospects of the company, including our performance against our business plan, our ability to grow despite the softening in our business, our industry and the global economic environment, revenue growth in certain of our market segments, potential new business segments, our continued investment into R&D, expected revenue growth, customers' acceptance of our new product offerings, the prospects of our new product development, our expectations regarding market and industry segment trends and prospects, and our projected expansion of capacity and the impact it may have on our business, (iii) our ability to penetrate new markets and expand our market share, (iv) the seasonality of our business, (v) our ability to reduce our expenses, and (vi) statements of the assumptions underlying or relating to any statement described in (i), (ii), (iii), (iv), or (v). These forward-looking statements are not historical facts or guarantees of future performance or events, are based on current expectations, estimates, beliefs, assumptions, goals, and objectives, and involve significant known and unknown risks, uncertainties and other factors that may cause actual results to be materially different from the results expressed by these statements. Readers of this press release and listeners to the accompanying conference call are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date hereof. Factors that could cause actual results to differ include, but are not limited to, continued downturn in the global economy, including due to the Russia-Ukraine and Israel-Gaza conflicts, inflation, consumer sentiment and other factors; adverse events arising from orders or regulations of governmental entities, including such orders or regulations that impact our customers or suppliers, and adoption of new or amended accounting standards; adverse changes in laws and government regulations such as tariffs on imports of foreign goods, export regulations and export classifications, including in foreign countries where MPS has offices or operations; the effect of export controls, trade and economic sanctions regulations and other regulatory or contractual limitations on our ability to sell or develop our products in certain foreign markets, particularly in China; our ability to obtain governmental licenses and approvals for international trading activities or technology transfers, including export licenses; acceptance of, or demand for, our products, in particular the new products launched recently, being different than expected; our ability to increase market share in our targeted markets; difficulty in predicting or budgeting for future customer demand and channel inventories, expenses and financial contingencies (including as a result of any continuing impact from the Russia-Ukraine and Israel-Gaza conflicts); our ability to efficiently and effectively develop new products and receive a return on our R&D expense investment; our ability to attract new customers and retain existing customers; our ability to meet customer demand for our products due to constraints on our third-party suppliers’ ability to manufacture sufficient quantities of our products or otherwise; our ability to expand manufacturing capacity to support future growth; adverse changes in production and testing efficiency of our products; any political, cultural, regulatory, economic, foreign exchange and operational changes in China, where a significant portion of our manufacturing capacity comes from; any market disruptions or interruptions in our schedule of new product development releases; our ability to manage our inventory levels; adequate supply of our products from our third-party manufacturing partners; adverse changes or developments in the semiconductor industry generally, which is cyclical in nature, and our ability to adjust our operations to address such changes or developments; the ongoing consolidation of companies in the semiconductor industry; competition generally and the increasingly competitive nature of our industry; our ability to realize the anticipated benefits of companies and products that we acquire, and our ability to effectively and efficiently integrate these acquired companies and products into our operations; the risks, uncertainties and costs of litigation in which we are involved; the outcome of any upcoming trials, hearings, motions and appeals; the adverse impact on our financial performance if its tax and litigation provisions are inadequate; our ability to effectively manage our growth and attract and retain qualified personnel; the effect of epidemics and pandemics on the global economy and on our business; the risks associated with the financial market, economy and geopolitical uncertainties, including the recent banking collapse and the Russia-Ukraine and Israel-Gaza conflicts; and other important risk factors identified under the caption “Risk Factors” and elsewhere in our Securities and Exchange Commission (“SEC”) filings, including, but not limited to, our Annual Report on Form 10-K filed with the SEC on February 24, 2023 and our Quarterly Reports on Form 10-Q filed with the SEC on May 5, 2023 and August 4, 2023. The forward-looking statements in this press release and statements made during the accompanying webinar represent our projections and current expectations, as of the date hereof, not predictions of actual performance, and should not be unduly relied upon. We assume no obligation to update the information in this press release or in the accompanying webinar.

About Monolithic Power Systems

Monolithic Power Systems, Inc. (“MPS”) is a fabless company with a global footprint that provides high-performance, semiconductor-based power electronic solutions. MPS’s mission is to reduce energy and material consumption to improve all aspects of quality of life. Founded in 1997 by our CEO Michael Hsing, MPS has three core strengths: deep system-level knowledge, strong semiconductor expertise, and innovative proprietary technologies in the areas of semiconductor processes, system integration, and packaging. These combined advantages enable MPS to deliver reliable, compact, and monolithic solutions that are highly energy-efficient and cost-effective, while providing a consistent return on investment to our stockholders. MPS can be contacted through its website at www.monolithicpower.com or its support offices around the world.

Monolithic Power Systems, MPS, and the MPS logo are registered trademarks of Monolithic Power Systems, Inc. in the U.S. and trademarked in certain other countries.

Contact:

Bernie Blegen

Chief Financial Officer

Monolithic Power Systems, Inc.

408-826-0777

investors@monolithicpower.com 

Monolithic Power Systems, Inc.

Condensed Consolidated Balance Sheets

(Unaudited, in thousands, except par value) 

Monolithic Power Systems, Inc.

Condensed Consolidated Statements of Operations

(Unaudited, in thousands, except per share amounts)