# EDGAR Filing Document

**Accession Number:** 0001280452
**File Stem:** 0001437749-25-032411
**Filing Date:** 2025-10
**Character Count:** 68591
**Document Hash:** f91a524bf21e0e51ea3a30fe1f09a685
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-25-032411.hdr.sgml**: 20251030

**ACCESSION NUMBER**: 0001437749-25-032411

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 17

**CONFORMED PERIOD OF REPORT**: 20251030

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251030

**DATE AS OF CHANGE**: 20251030

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MONOLITHIC POWER SYSTEMS INC
- **CENTRAL INDEX KEY:** 0001280452
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 770466789
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-51026
- **FILM NUMBER:** 251435340

**BUSINESS ADDRESS:**
- **STREET 1:** 5808 LAKE WASHINGTON BLVD. NE
- **CITY:** KIRKLAND
- **STATE:** WA
- **ZIP:** 98033
- **BUSINESS PHONE:** 425-296-9956

**MAIL ADDRESS:**
- **STREET 1:** 5808 LAKE WASHINGTON BLVD. NE
- **CITY:** KIRKLAND
- **STATE:** WA
- **ZIP:** 98033

?xml version='1.0' encoding='ASCII'? mpwr20250819_8k.htm

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**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549**

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**FORM**8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of**

**the Securities Exchange Act of 1934**

Date of Report (date of earliest event reported):

**October 30, 2025**

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**MONOLITHIC POWER SYSTEMS, INC.**

(Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware** | **000-51026** | **77-0466789** |
| (State or other jurisdiction of | (Commission | (I.R.S. Employer |
| incorporation or organization) | File Number) | Identification Number) |

---

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1555 Palm Beach Lakes Blvd.,** <br> **West Palm Beach, Florida 33401**<br> (Address of principal executive offices)(Zip Code)<sup>1</sup> | **5808 Lake Washington Blvd. NE**,** <br> **Kirkland**, Washington 98033**<br> (Address of principal executive offices) (Zip Code)<sup>1</sup> |

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| |
|:---|
| &nbsp;&nbsp;&nbsp; **(**425**)**296-9956** |
| (Registrant's telephone number, including area code) |

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Stock, par value $0.001 per share | MPWR | The NASDAQ Global Select Market |

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Indicate by check mark whether the registrant is an emerging growth company as deﬁned in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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<sup>1</sup> We have operations in multiple locations in the US, Europe and Asia. Accordingly, we do not maintain a headquarters. We are including these addresses solely for the purpose of satisfying the Securities and Exchange Commission's requirements.

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**Item 2.02 Results of Operations and Financial Condition.**

On October 30, 2025, Monolithic Power Systems, Inc. issued a press release regarding its financial results for the quarter ended September 30, 2025. The press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

Attached hereto as Exhibit 99.2 and incorporated by reference herein is financial information and commentary regarding results of the quarter ended September 30, 2025.

The information under Item 2.02 of this Current Report on Form 8-K and Exhibits 99.1 and 99.2 attached hereto are being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "1934 Act"), nor shall they be deemed incorporated by reference in any filing with the Securities and Exchange Commission under the 1934 Act or the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

**Item 9.01 Financial Statements and Exhibits.**

(d) Exhibits.

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| | |
|:---|:---|
| **Exhibit** | **Description** |
| 99.1 | [Press release issued on October 30, 2025, announcing the financial results for the quarter ended September 30, 2025.](ex_854756.htm) |
| 99.2 | [Earnings commentary for the quarter ended September 30, 2025.](ex_854757.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL Document). |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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| | | |
|:---|:---|:---|
| Date: October 30, 2025 | By: | /s/ T. Bernie Blegen |
|  |  | **T. Bernie Blegen** |
|  |  | **Executive Vice President and Chief Financial Officer** |

---

## Exhibit 99.1

**Exhibit 99.1**

![logosmall.jpg](logosmall.jpg)

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| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **PRESS RELEASE** |
| **For Immediate Release** |

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**Monolithic Power Systems Announces** 

**Results for the Third Quarter Ended September 30, 2025**

**Schaffhausen, Switzerland, October 30, 2025 --** Monolithic Power Systems, Inc. ("MPS") (Nasdaq: MPWR), a fabless global company that provides high-performance, semiconductor-based power electronics solutions, today announced financial results for the quarter ended September 30, 2025.

The financial results for the quarter ended September 30, 2025 were as follows:

&nbsp;&nbsp;&nbsp;&nbsp;● Revenue was $737.2 million for the quarter ended September 30, 2025 , a 10.9% increase from $664.6 million for the quarter ended June 30, 2025 and an 18.9% increase from $620.1 million for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP gross margin was 55.1% for the quarter ended September 30, 2025 , compared with 55.4% for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP gross margin (1) was 55.5% for the quarter ended September 30, 2025 , excluding the impact of $1.9 million for stock-based compensation and related expenses, $0.5 million for deferred compensation plan expense and $0.3 million for amortization of acquisition-related intangible assets, compared with 55.8% for the quarter ended September 30, 2024 , excluding the impact of $1.7 million for stock-based compensation and related expenses, $0.5 million for deferred compensation plan expense and $0.3 million for amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP operating expenses were $211.0 million for the quarter ended September 30, 2025 , compared with $179.4 million for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP operating expenses (1) were $148.3 million for the quarter ended September 30, 2025 , excluding $59.0 million for stock-based compensation and related expenses and $3.7 million for deferred compensation plan expense , compared with $125.2 million for the quarter ended September 30, 2024 , excluding $50.7 million for stock-based compensation and related expenses and $3.5 million for deferred compensation plan expense .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP operating income was $195.2 million for the quarter ended September 30, 2025 , compared with $164.0 million for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP operating income (1) was $260.6 million for the quarter ended September 30, 2025 , excluding $60.9 million for stock-based compensation and related expenses, $4.2 million for deferred compensation plan expense and $0.3 million for amortization of acquisition-related intangible assets, compared with $220.8 million for the quarter ended September 30, 2024 , excluding $52.4 million for stock-based compensation and related expenses, $4.0 million for deferred compensation plan expense and $0.3 million for amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP other income, net was $10.4 million for the quarter ended September 30, 2025 , compared with $10.3 million for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP other income, net (1) was $6.6 million for the quarter ended September 30, 2025 , excluding $3.8 million for deferred compensation plan income , compared with $6.4 million for the quarter ended September 30, 2024 , excluding $3.9 million for deferred compensation plan income .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP income before income taxes was $205.6 million for the quarter ended September 30, 2025 , compared with $174.3 million for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP income before income taxes (1) was $267.2 million for the quarter ended September 30, 2025 , excluding $60.9 million for stock-based compensation and related expenses, $0.4 million for net deferred compensation plan expense and $0.3 million for amortization of acquisition-related intangible assets, compared with $227.2 million for the quarter ended September 30, 2024 , excluding $52.4 million for stock-based compensation and related expenses, $0.3 million for amortization of acquisition-related intangible assets and $0.1 million for net deferred compensation plan expense .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP net income was $178.3 million and $3.71 per diluted share for the quarter ended September 30, 2025 . Comparatively, GAAP net income was $144.4 million and $2.95 per diluted share for the quarter ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP net income (1) was $227.1 million and $4.73 per diluted share for the quarter ended September 30, 2025 , excluding $60.9 million for stock-based compensation and related expenses, $0.4 million for net deferred compensation plan expense , $0.3 million for amortization of acquisition-related intangible assets and $12.8 million for related tax effects, compared with $198.8 million and $4.06 per diluted share for the quarter ended September 30, 2024 , excluding $52.4 million for stock-based compensation and related expenses, $0.3 million for amortization of acquisition-related intangible assets, $0.1 million for net deferred compensation plan expense and $1.5 million for related tax effects.

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The financial results for the nine months ended September 30, 2025 were as follows:

&nbsp;&nbsp;&nbsp;&nbsp;● Revenue was $2,039.3 million for the nine months ended September 30, 2025 , a 28.6% increase from $1,585.4 million for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP gross margin was 55.2% for the nine months ended September 30, 2025 , compared with 55.3% for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP gross margin (1) was 55.5% for the nine months ended September 30, 2025 , excluding the impact of $5.5 million for stock-based compensation and related expenses, $0.9 million for deferred compensation plan expense and $0.9 million for amortization of acquisition-related intangible assets, compared with 55.7% for the nine months ended September 30, 2024 , excluding the impact of $5.2 million for stock-based compensation and related expenses, $1.1 million for deferred compensation plan expense and $0.9 million for amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP operating expenses were $596.8 million for the nine months ended September 30, 2025 , compared with $500.4 million for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP operating expenses (1) were $419.5 million for the nine months ended September 30, 2025 , excluding $169.4 million for stock-based compensation and related expenses, $7.8 million for deferred compensation plan expense and $0.1 million for amortization of acquisition-related intangible assets, compared with $340.3 million for the nine months ended September 30, 2024 , excluding $151.7 million for stock-based compensation and related expenses, $8.4 million for deferred compensation plan expense and $0.1 million for amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP operating income was $528.7 million for the nine months ended September 30, 2025 , compared with $376.1 million for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP operating income (1) was $713.3 million for the nine months ended September 30, 2025 , excluding $175.0 million for stock-based compensation and related expenses, $8.7 million for deferred compensation plan expense and $1.0 million for amortization of acquisition-related intangible assets, compared with $543.4 million for the nine months ended September 30, 2024 , excluding $156.9 million for stock-based compensation and related expenses, $9.5 million for deferred compensation plan expense and $1.0 million for amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP other income, net was $27.7 million for the nine months ended September 30, 2025 , compared with $27.3 million for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP other income, net (1) was $19.7 million for the nine months ended September 30, 2025 , excluding $8.0 million for deferred compensation plan income , compared with $18.2 million for the nine months ended September 30, 2024 , excluding $9.2 million for deferred compensation plan income .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP income before income taxes was $556.4 million for the nine months ended September 30, 2025 , compared with $403.4 million for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP income before income taxes (1) was $733.1 million for the nine months ended September 30, 2025 , excluding $175.0 million for stock-based compensation and related expenses, $1.0 million for amortization of acquisition-related intangible assets and $0.7 million for net deferred compensation plan expense , compared with $561.5 million for the nine months ended September 30, 2024 , excluding $156.9 million for stock-based compensation and related expenses, $1.0 million for amortization of acquisition-related intangible assets and $0.3 million for net deferred compensation plan expense .

&nbsp;&nbsp;&nbsp;&nbsp;● GAAP net income was $445.8 million and $9.28 per diluted share for the nine months ended September 30, 2025 . Comparatively, GAAP net income was $337.3 million and $6.89 per diluted share for the nine months ended September 30, 2024 .

&nbsp;&nbsp;&nbsp;&nbsp;● Non-GAAP net income (1) was $623.1 million and $12.98 per diluted share for the nine months ended September 30, 2025 , excluding $175.0 million for stock-based compensation and related expenses, $1.0 million for amortization of acquisition-related intangible assets, $0.7 million for net deferred compensation plan expense and $0.7 million for related tax effects, compared with $491.4 million and $10.04 per diluted share for the nine months ended September 30, 2024 , excluding $156.9 million for stock-based compensation and related expenses, $1.0 million for amortization of acquisition-related intangible assets, $0.3 million for net deferred compensation plan expense and $4.1 million for related tax effects.

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

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
| **End Market** | **2025** | **2024** | **2025** | **2024** |
| Storage and Computing | $186572 | $143993 | $570403 | $365069 |
| Enterprise Data | 191482 | 184459 | 468370 | 521397 |
| Automotive | 151540 | 111344 | 441576 | 285629 |
| Communications | 79868 | 71884 | 225322 | 162095 |
| Consumer | 72399 | 64401 | 189009 | 144704 |
| Industrial | 55315 | 44038 | 144624 | 106541 |
| Total | $737176 | $620119 | $2039304 | $1585435 |

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"Our results demonstrate our continued success in transforming from a chip-only, semiconductor supplier to a full service, silicon-based solutions provider," said Michael Hsing, CEO and founder of MPS.

**Business Outlook**

The following are MPS's financial targets for the fourth quarter ending December 31, 2025:

● Revenue in the range of $730.0 million to $750.0 million.

● GAAP gross margin between 54.9% and 55.5% . Non-GAAP gross margin (1) between 55.2% and 55.8% , which excludes the impact from stock-based compensation and related expenses as well as the impact from amortization of acquisition-related intangible assets.

● GAAP operating expenses between $206.8 million and $212.8 million. Non-GAAP operating expenses (1) between $145.5 million and $149.5 million, which excludes estimated stock-based compensation and related expenses in the range of $61.3 million to $63.3 million.

● Total stock-based compensation and related expenses of $63.2 million to $65.2 million including approximately $1.9 million that would be charged to cost of goods sold.

● Interest and other income in the range of $7.4 million to $7.8 million before foreign exchange gains or losses.

● Non-GAAP tax rate of 15% for 2025.

● Fully diluted shares outstanding between 48.5 million and 48.9 million.

(1) Non-GAAP net income, non-GAAP net income per share, non-GAAP gross margin, non-GAAP operating expenses, non-GAAP operating income, non-GAAP other income, net and non-GAAP income before income taxes differ from net income, net income per share, gross margin, operating expenses, operating income, other income, net and income before income taxes determined in accordance with U.S. Generally Accepted Accounting Principles ("GAAP"). Non-GAAP net income and non-GAAP net income per share exclude the effect of stock-based compensation and related expenses, which include stock-based compensation expense and employer payroll taxes in relation to the stock-based compensation, net deferred compensation plan expense, amortization of acquisition-related intangible assets and related tax effects. Non-GAAP gross margin excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP operating expenses exclude the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP operating income excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP other income, net excludes the effect of deferred compensation plan income. Non-GAAP income before income taxes excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and net deferred compensation plan expense. Projected non-GAAP gross margin excludes the effect of stock-based compensation and related expenses, and amortization of acquisition-related intangible assets. Projected non-GAAP operating expenses exclude the effect of stock-based compensation and related expenses. 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. See the GAAP to non-GAAP reconciliations in the tables set forth below.

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**Earnings Commentary**

Earnings commentary on the results of operations for the quarter ended September 30, 2025 is available under the Investor Relations page on the MPS website.

**Earnings Webinar**

MPS plans to host a question-and-answer webinar covering its financial results at 2:00 p.m. PT / 5:00 p.m. ET, October 30, 2025. The live event will be held via a Zoom webcast, which can be accessed at: <u>https://mpsic.zoom.us/j/95600837087</u>. The Zoom webcast can also be accessed live over the phone by dialing (669) 444-9171; the webcast ID is 95600837087. A replay of the event 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 earnings webinar will contain, forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including under the "Business Outlook" section, including, among other things, (i) projected revenue, GAAP and non-GAAP gross margin, GAAP and non-GAAP operating expenses, stock-based compensation and related expenses, amortization of acquisition-related intangible assets, other income before foreign exchange gains or losses, and fully diluted shares outstanding, (ii) our outlook for the fourth quarter of fiscal year 2025 and the near-term, medium-term and long-term prospects of MPS, including our ability to adapt to changing market conditions, performance against our business plan, our ability to grow despite the various challenges facing our business, our industry and the global economic environment, revenue growth in certain of our end markets, potential new business segments, our continued investment in research and development ("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 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) our ability to reduce our expenses, and (v) statements regarding the assumptions underlying or relating to any statement described in (i), (ii), (iii), or (iv). 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 earnings webinar 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 uncertainties in the global economy, including due to the Russia-Ukraine and Middle East conflicts, global tariffs, export controls and retaliatory measures and announcements regarding same, 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, and tax laws (including the H.R.1 Act signed into law on July 4, 2025) or the interpretation of same, 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 Middle East 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, military, 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 MPS acquires, 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 MPS is involved; the outcome of any upcoming trials, hearings, motions and appeals; the adverse impact on our financial performance if our 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, global tariffs, export controls and retaliatory measures and announcements regarding same, and geopolitical uncertainties, including the Russia-Ukraine and Middle East 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 March 3, 2025. MPS assumes no obligation to update the information in this press release or in the accompanying earnings webinar.

**About Monolithic Power Systems**

Monolithic Power Systems, Inc. ("MPS") is a fabless global company that provides high-performance, semiconductor-based power electronics 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, cost-effective, and environmentally responsible 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

Executive Vice President and Chief Financial Officer

Monolithic Power Systems, Inc.

408-826-0777

MPSInvestor.Relations@monolithicpower.com

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**Monolithic Power Systems, Inc.**

**Condensed Consolidated Balance Sheets**

(Unaudited, in thousands, except par value)

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| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
| **ASSETS** |  |  |
| Current assets: |  |  |
| &nbsp;&nbsp;&nbsp; Cash and cash equivalents | $1081251 | $691816 |
| &nbsp;&nbsp;&nbsp; Short-term investments | 188233 | 171130 |
| &nbsp;&nbsp;&nbsp; Accounts receivable, net | 241560 | 172518 |
| &nbsp;&nbsp;&nbsp; Inventories | 505680 | 419611 |
| &nbsp;&nbsp;&nbsp; Other current assets | 96021 | 109978 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total current assets | 2112745 | 1565053 |
| Property and equipment, net | 597311 | 494945 |
| Acquisition-related intangible assets, net | 9077 | 9938 |
| Goodwill | 25944 | 25944 |
| Deferred tax assets, net | 1300260 | 1326840 |
| Other long-term assets | 161055 | 194377 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total assets | $4206392 | $3617097 |
| **LIABILITIES AND STOCKHOLDERS' EQUITY** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp; Accounts payable | $141689 | $102526 |
| &nbsp;&nbsp;&nbsp; Accrued compensation and related benefits | 99602 | 63918 |
| &nbsp;&nbsp;&nbsp; Other accrued liabilities | 201513 | 128123 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total current liabilities | 442804 | 294567 |
| Income tax liabilities | 78261 | 65193 |
| Other long-term liabilities | 117380 | 111570 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total liabilities | 638445 | 471330 |
| Commitments and contingencies |  |  |
| Stockholders' equity: |  |  |
| &nbsp;&nbsp;&nbsp; Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 47,905 and 47,823, respectively | 885123 | 706817 |
| &nbsp;&nbsp;&nbsp; Retained earnings | 2705527 | 2487461 |
| &nbsp;&nbsp;&nbsp; Accumulated other comprehensive loss | (22703) | (48511) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total stockholders' equity | 3567947 | 3145767 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total liabilities and stockholders' equity | $4206392 | $3617097 |

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**Monolithic Power Systems, Inc.**

**Condensed Consolidated Statements of Operations**

(Unaudited, in thousands, except per share amounts)

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Revenue | $737176 | $620119 | $2039304 | $1585435 |
| Cost of revenue | 330948 | 276676 | 913830 | 708973 |
| Gross profit | 406228 | 343443 | 1125474 | 876462 |
| Operating expenses: |  |  |  |  |
| Research and development | 98173 | 85051 | 286666 | 238986 |
| Selling, general and administrative | 112872 | 94364 | 310108 | 261425 |
| Total operating expenses | 211045 | 179415 | 596774 | 500411 |
| Operating income | 195183 | 164028 | 528700 | 376051 |
| Other income, net | 10392 | 10278 | 27743 | 27330 |
| Income before income taxes | 205575 | 174306 | 556443 | 403381 |
| Income tax expense | 27301 | 29876 | 110652 | 66044 |
| Net income | $178274 | $144430 | $445791 | $337337 |
| Net income per share: |  |  |  |  |
| Basic | $3.72 | $2.96 | $9.31 | $6.93 |
| Diluted | $3.71 | $2.95 | $9.28 | $6.89 |
| Weighted-average shares outstanding: |  |  |  |  |
| Basic | 47898 | 48757 | 47879 | 48692 |
| Diluted | 48042 | 48964 | 48022 | 48945 |

---

------

---

| |
|:---|
| **RECONCILIATION OF NET INCOME TO NON-GAAP NET INCOME** |
| (Unaudited, in thousands, except per share amounts) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Net income | $178274 | $144430 | $445791 | $337337 |
| Adjustments to reconcile net income to non-GAAP net income: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense, net | 423 | 141 | 698 | 294 |
| Tax effect | (12778) | 1479 | 692 | (4149) |
| Non-GAAP net income | $227114 | $198786 | $623107 | $491354 |
| Non-GAAP net income per share: |  |  |  |  |
| Basic | $4.74 | $4.08 | $13.01 | $10.09 |
| Diluted | $4.73 | $4.06 | $12.98 | $10.04 |
| Shares used in the calculation of non-GAAP net income per share: |  |  |  |  |
| Basic | 47898 | 48757 | 47879 | 48692 |
| Diluted | 48042 | 48964 | 48022 | 48945 |

---

------

---

| |
|:---|
| **RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN** |
| (Unaudited, in thousands) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Gross profit | $406228 | $343443 | $1125474 | $876462 |
| Gross margin | 55.1% | 55.4% | 55.2% | 55.3% |
| Adjustments to reconcile gross profit to non-GAAP gross profit: |  |  |  |  |
| Stock-based compensation and related expenses | 1917 | 1695 | 5538 | 5230 |
| Amortization of acquisition-related intangible assets | 287 | 287 | 861 | 884 |
| Deferred compensation plan expense | 500 | 543 | 942 | 1083 |
| Non-GAAP gross profit | $408932 | $345968 | $1132815 | $883659 |
| Non-GAAP gross margin | 55.5% | 55.8% | 55.5% | 55.7% |

---

---

| |
|:---|
| **RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES** |
| (Unaudited, in thousands) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total operating expenses | $211045 | $179415 | $596774 | $500411 |
| Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: |  |  |  |  |
| Stock-based compensation and related expenses | (58958) | (50721) | (169428) | (151659) |
| Amortization of acquisition-related intangible assets | (33) | (33) | (99) | (99) |
| Deferred compensation plan expense | (3715) | (3492) | (7778) | (8391) |
| Non-GAAP operating expenses | $148339 | $125169 | $419469 | $340262 |

---

------

---

| |
|:---|
| **RECONCILIATION OF OPERATING INCOME TO NON-GAAP OPERATING INCOME** |
| (Unaudited, in thousands) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total operating income | $195183 | $164028 | $528700 | $376051 |
| Adjustments to reconcile total operating income to non-GAAP total operating income: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense | 4215 | 4035 | 8720 | 9474 |
| Non-GAAP operating income | $260593 | $220799 | $713346 | $543397 |

---

---

| |
|:---|
| **RECONCILIATION OF OTHER INCOME, NET, TO NON-GAAP OTHER INCOME, NET** |
| (Unaudited, in thousands) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total other income, net | $10392 | $10278 | $27743 | $27330 |
| Adjustments to reconcile other income, net to non-GAAP other income, net: |  |  |  |  |
| Deferred compensation plan income | (3792) | (3895) | (8022) | (9180) |
| Non-GAAP other income, net | $6600 | $6383 | $19721 | $18150 |

---

---

| |
|:---|
| **RECONCILIATION OF INCOME BEFORE INCOME TAXES TO NON-GAAP INCOME BEFORE INCOME TAXES** |
| (Unaudited, in thousands) |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended September 30,** | **Three Months Ended September 30,** | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total income before income taxes | $205575 | $174306 | $556443 | $403381 |
| Adjustments to reconcile income before income taxes to non-GAAP income before income taxes: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense, net | 423 | 141 | 698 | 294 |
| Non-GAAP income before income taxes | $267193 | $227183 | $733067 | $561547 |

---

------

---

| |
|:---|
| **2025 FOURTH QUARTER OUTLOOK** |
| **RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN** |
| (Unaudited) |

---

---

| | | |
|:---|:---|:---|
|  | **Three Months Ending** | **Three Months Ending** |
|  | **December 31, 2025** | **December 31, 2025** |
|  | **Low** | **High** |
| Gross margin | 54.9% | 55.5% |
| Adjustment to reconcile gross margin to non-GAAP gross margin: |  |  |
| Stock-based compensation and other expenses | 0.3% | 0.3% |
| Non-GAAP gross margin | 55.2% | 55.8% |

---

---

| |
|:---|
| **RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES** |
| (Unaudited, in thousands) |

---

---

| | | |
|:---|:---|:---|
|  | **Three Months Ending** | **Three Months Ending** |
|  | **December 31, 2025** | **December 31, 2025** |
|  | **Low** | **High** |
| Operating expenses | $206800 | $212800 |
| Adjustments to reconcile operating expenses to non-GAAP operating expenses: |  |  |
| Stock-based compensation and other expenses | (61300) | (63300) |
| Non-GAAP operating expenses | $145500 | $149500 |

---

## Exhibit 99.2

**Exhibit 99.2**

## Monolithic Power Systems
Q3'25 Earnings Commentary

![mps01.jpg](mps01.jpg)

The highest quality power solutions for

Industrial Applications, Telecom Infrastructures,

Cloud Computing, Automotive, and Consumer Applications

------

**Monolithic Power Systems Reports Third Quarter Results on October 30, 2025**<br>MPS reported its results after market close on October 30, 2025 and will host a question-and-answer webinar at 2:00 p.m. PT / 5:00 p.m. ET. The live event will be held via a Zoom webcast, which can be accessed at <u>https://mpsic.zoom.us/j/95600837087</u>.<br>

---

| | |
|:---|:---|
| **Q3 2025 Financial Summary** | (Unaudited) |

---

**GAAP**<br>

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Q3'25** | **Q2'25** | **Q3'24** | **QoQ Change** | **YoY Change** |
| Revenue ($k) | $737176 | $664574 | $620119 | Up 10.9% | Up 18.9% |
| Gross Margin | 55.1% | 55.1% | 55.4% | Flat | Down 0.3 pts |
| Opex ($k) | $211045 | $201258 | $179415 | Up 4.9% | Up 17.6% |
| Operating Margin | 26.5% | 24.8% | 26.5% | Up 1.7 pts | Flat |
| Net income ($k) | $178274 | $133726 | $144430 | Up 33.3% | Up 23.4% |
| Diluted EPS | $3.71 | $2.78 | $2.95 | Up 33.5% | Up 25.8% |

---

**Non-GAAP**<br>

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Q3'25** | **Q2'25** | **Q3'24** | **QoQ Change** | **YoY Change** |
| Revenue ($k) | $737176 | $664574 | $620119 | Up 10.9% | Up 18.9% |
| Gross Margin | 55.5% | 55.5% | 55.8% | Flat | Down 0.3 pts |
| Opex ($k) | $148339 | $137604 | $125169 | Up 7.8% | Up 18.5% |
| Operating Margin | 35.4% | 34.8% | 35.6% | Up 0.6 pts | Down 0.2 pts |
| Net income ($k) | $227114 | $202180 | $198786 | Up 12.3% | Up 14.3% |
| Diluted EPS | $4.73 | $4.21 | $4.06 | Up 12.4% | Up 16.5% |
| Tax Rate | 15.0% | 15.0% | 12.5% | Flat | Up 2.5 pts |

---

**Revenue by End Market**<br>

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
|  | **Revenue** | **Revenue** | **YoY Change** | **YoY Change** | **% of Revenue** | **% of Revenue** |
| **End Market ($M)** | **Q3'25** | **Q3'24** | $**%** | **%** | **Q3'25** | **Q3'24** |
| Enterprise Data | $191.5 | $184.5 |  | 3.8% | 26.0% | 29.7% |
| Storage & Computing | 186.6 | 144.0 |  | 29.6% | 25.3 | 23.2 |
| Automotive | 151.5 | 111.3 |  | 36.1% | 20.6 | 18.0 |
| Communications | 79.9 | 71.9 |  | 11.1% | 10.8 | 11.6 |
| Consumer | 72.4 | 64.4 |  | 12.4% | 9.8 | 10.4 |
| Industrial | 55.3 | 44.0 |  | 25.7% | 7.5 | 7.1 |
| Total | $737.2 | $620.1 |  | 18.9% | 100% | 100% |

---

------

**Ongoing Business Conditions**

In the third quarter of 2025, MPS achieved record quarterly revenue of $737.2 million, 10.9% higher than revenue in the second quarter of 2025 and 18.9% higher than revenue in the third quarter of 2024.

Our quarterly performance reflected the continued strength of our product portfolio, the resilience of our diversified market strategy, and our relentless customer focus.

Q3 2025 highlights include:

● Our diversified market strategy drove year-over-year revenue growth in all our end markets.

● We continued to expand our automotive customer base with another major Tier 1 supplier adopting MPS for its next generation ADAS solution.

● We had our first design win for a full BMS solution on a robotics platform continuing our shift from chips to solutions.

Overall, we continued to demonstrate our ability to grow and swiftly adapt all aspects of our business to the fluid geopolitical and macro-economic environment.

Our strategy remains unchanged. MPS continues to focus on innovation, solving our customers' most challenging problems, and maintaining the highest level of quality. We continue to invest in new technology, expand into new markets, and to diversify our end-market applications and global supply chain. This will allow us to capture future growth opportunities, maintain supply stability, and rapidly adapt to market changes as they occur.

"Our results demonstrate our continued success in transforming from a chip-only, semiconductor supplier to a full service, silicon-based solutions provider," said Michael Hsing, CEO and founder of MPS.

**Q3 2025 Revenue Results**

MPS reported third quarter revenue of $737.2 million, 10.9% higher than the second quarter of 2025 and 18.9% higher than the third quarter of 2024. Compared with the second quarter of 2025, sales in Enterprise Data, Automotive, Communications, Consumer and Industrial improved sequentially.

In our Enterprise Data market, third quarter 2025 revenue of $191.5 million increased 33% from the second quarter of 2025. The sequential increase was primarily driven by higher sales of our power management solutions for AI applications. Third quarter 2025 Enterprise Data revenue was up 3.8% year over year. Enterprise Data revenue represented 26.0% of our total third quarter 2025 revenue compared with 21.7% in the second quarter of 2025.

------

Third quarter 2025 Consumer revenue of $72.4 million increased 21.3% from the second quarter of 2025 primarily from higher sales in gaming solutions. Third quarter 2025 Consumer revenue was up 12.4% year over year. Consumer revenue represented 9.8% of our total third quarter 2025 revenue compared with 9.0% in the second quarter of 2025.

Third quarter 2025 Industrial revenue of $55.3 million increased 18.4% from the second quarter of 2025 primarily due to higher sales for power sources. Third quarter 2025 Industrial revenue was up 25.7% year over year. Industrial revenue represented 7.5% of our total third quarter 2025 revenue compared with 7.0% in the second quarter of 2025.

Third quarter 2025 Communications revenue of $79.9 million was up 8.3% from the second quarter of 2025 primarily on higher sales into networking solutions. Third quarter 2025 Communications revenue was up 11.1% year over year. Communications sales represented 10.8% of our total third quarter 2025 revenue compared with 11.1% in the second quarter of 2025.

Third quarter Automotive revenue of $151.5 million increased 4.4% from the second quarter of 2025 primarily from higher sales in applications supporting infotainment and USB connectors. Third quarter 2025 Automotive revenue was up 36.1% year over year. Automotive revenue represented 20.6% of MPS's third quarter 2025 revenue compared with 21.8% in the second quarter of 2025.

Third quarter 2025 Storage and Computing revenue of $186.6 million decreased 4.5% from the second quarter of 2025 due to lower sales of power solutions for notebooks. Third quarter 2025 Storage and Computing revenue was up 29.6% year over year. Storage and Computing revenue represented 25.3% of MPS's third quarter 2025 revenue compared with 29.4% in the second quarter of 2025.

**Q3 2025 Gross Margin & Operating Income**

GAAP gross margin was 55.1%, flat to the second quarter of 2025. Our GAAP operating income was $195.2 million compared to $164.8 million reported in the second quarter of 2025.

Non-GAAP gross margin for the third quarter of 2025 was 55.5%, flat to the second quarter of 2025. Our non-GAAP operating income was $260.6 million compared to $231.2 million reported in the second quarter of 2025.

**Q3 2025 Operating Expenses**

Our GAAP operating expenses were $211.0 million in the third quarter of 2025 compared with $201.3 million in the second quarter of 2025. Our non-GAAP operating expenses were $148.3 million, up from $137.6 million in the second quarter of 2025.

The differences between non-GAAP operating expenses and GAAP operating expenses for the quarters discussed here are primarily stock-based compensation and related expenses and deferred compensation plan expense.

------

Total stock-based compensation and related expenses, including approximately $1.9 million charged to cost of goods sold, was $60.9 million compared with $60.3 million recorded in the second quarter of 2025.

**The Bottom Line**

Third quarter 2025 GAAP net income was $178.3 million or $3.71 per fully diluted share, compared with $133.7 million or $2.78 per fully diluted share in the second quarter of 2025.

Third quarter 2025 non-GAAP net income was $227.1 million or $4.73 per fully diluted share, compared with $202.2 million or $4.21 per fully diluted share in the second quarter of 2025.

The third quarter 2025 non-GAAP tax rate of 15% was flat to the second quarter of 2025.

There were 48 million fully diluted shares outstanding at the end of the third quarter of 2025.

**Balance Sheet and Cash Flow**

Cash, cash equivalents and short-term investments were $1,269.5 million at the end of the third quarter of 2025 compared to $1,146.1 million at the end of the second quarter of 2025. For the third quarter of 2025, MPS generated operating cash flow of $239.3 million compared to operating cash flow of $237.6 million for the second quarter of 2025.

Accounts receivable at the end of the third quarter of 2025 were $241.6 million, representing 30 days of sales outstanding, which was 3 days higher than the 27 days reported at the end of the second quarter of 2025.

Our internal inventories at the end of the third quarter of 2025 were $505.7 million, up from $490.6 million at the end of the second quarter of 2025. Days of inventory of 139 days at the end of the third quarter of 2025 was 11 days lower than at the end of the second quarter of 2025.

We continue to manage our internal inventories, balancing the uncertainty in the market with being prepared to capture market upturns as they occur. Comparing current inventory levels using next quarter's projected revenue, days of inventory at the end of the third quarter of 139 days is 4 days higher than at the end of the second quarter of 2025.

------

---

| | | | |
|:---|:---|:---|:---|
| **Selected Balance Sheet and Inventory Data**  | (Unaudited) | (Unaudited) | (Unaudited) |
|  | **Q3'25** | **Q2'25** | **Q3'24** |
| Cash, Cash Equivalents, and Short-Term Investments | $1,269.5 M | $1,146.1 M | $1,462.4 M |
| Operating Cash Flow | $239.3 M | $237.6 M | $231.7 M |
| Accounts Receivable | $241.6 M | $194.8 M | $164.7 M |
| Days of Sales Outstanding | 30 Days | 27 Days | 24 Days |
| Internal Inventories | $505.7 M | $490.6 M | $424.9 M |
| Days of Inventory (current quarter revenue) | 139 Days | 150 Days | 140 Days |
| Days of Inventory (next quarter revenue) | 139 Days | 135 Days | 139 Days |

---

**Q4 2025 Business Outlook**

For the fourth quarter of 2025 ending December 31, we are forecasting:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Revenue in the range of $730 million to $750 million.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• GAAP gross margin in the range of 54.9% to 55.5%

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Non-GAAP gross margin in the range of 55.2% to 55.8% which excludes the impact from stock-based compensation and related expenses as well as the impact from amortization of acquisition-related intangible assets.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Total stock-based compensation and related expenses in the range of $63.2 million to $65.2 million including approximately $1.9 million that would be charged to cost of goods sold.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• GAAP operating expenses between $206.8 million and $212.8 million.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Non-GAAP operating expenses in the range of $145.5 million to $149.5 million. This estimate excludes stock-based compensation and related expenses in the range of $61.3 million to $63.3 million.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Interest and other income in the range from $7.4 million to $7.8 million before foreign exchange gains or losses.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Non-GAAP tax rate of 15% for 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Fully diluted shares outstanding in the range of 48.5 to 48.9 million shares.

------

**For further information, contact:**

Bernie Blegen

Executive Vice President and Chief Financial Officer

Monolithic Power Systems, Inc.

408-826-0777

<u>MPSInvestor.Relations@monolithicpower.com</u>

**Safe Harbor Statement**

This earnings commentary 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, that should not be unduly relied upon, including under the "Q4'25 Business Outlook" section herein, our statement regarding our business focus, our statement regarding the expansion and diversification of our global supply chain, our statement regarding our ability to capture future growth opportunities, maintain supply stability and swiftly adapt to market changes as they occur, our statements regarding our inventory management to capture market upturns and our days of inventory compared to our Q4 2025 projected revenue, and the quote from our CEO and founder, including, among other things, (i) projected revenue, GAAP and non-GAAP gross margin, GAAP and non-GAAP operating expenses, stock-based compensation and related expenses, amortization of acquisition-related intangible assets, other income before foreign exchange gains or losses, and fully diluted shares outstanding, (ii) our outlook for the fourth quarter of fiscal year 2025 and the near-term, medium-term and long-term prospects of MPS, including our ability to adapt to changing market conditions, performance against our business plan, our ability to grow despite the various challenges facing our business, our industry and the global economic environment, revenue growth in certain of our end markets, potential new business segments, our continued investment in research and development ("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 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) our ability to reduce our expenses, and (vi) statements regarding the assumptions underlying or relating to any statement described in (i), (ii), (iii), or (iv). 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 earnings commentary 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 uncertainties in the global economy, including due to the Russia-Ukraine and Middle East conflicts, global tariffs, export controls and retaliatory measures and announcements regarding same, 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, and tax laws (including the H.R.1 Act signed into law on July 4, 2025) or the interpretation of same, 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 Middle East 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, military, 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 MPS acquires, 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 MPS is 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, global tariffs, export controls and retaliatory measures and announcements regarding same, and geopolitical uncertainties, including the Russia-Ukraine and Middle East 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 March 3, 2025. MPS assumes no obligation to update the information in this earnings commentary or in the accompanying webinar.

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**Non-GAAP Financial Measures**

This earnings commentary contains references to certain non-GAAP financial measures. Non-GAAP net income, non-GAAP net income per share, non-GAAP gross margin, non-GAAP operating expenses, non-GAAP operating income, non-GAAP other income, net, and non-GAAP income before income taxes differ from net income, net income per share, gross margin, operating expenses, operating income, other income, net, and income before income taxes determined in accordance with U.S. Generally Accepted Accounting Principles ("GAAP"). Non-GAAP net income and non-GAAP net income per share exclude the effect of stock-based compensation and related expenses, which include stock-based compensation expense and employer payroll taxes in relation to the stock-based compensation, net deferred compensation plan expense, amortization of acquisition-related intangible assets and related tax effects. Non-GAAP gross margin excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP operating expenses exclude the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP operating income excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and deferred compensation plan expense. Non-GAAP other income, net excludes the effect of deferred compensation plan income. Non-GAAP income before income taxes excludes the effect of stock-based compensation and related expenses, amortization of acquisition-related intangible assets and net deferred compensation plan expense. Projected non-GAAP gross margin excludes the effect of stock-based compensation and related expenses, and amortization of acquisition-related intangible assets. Projected non-GAAP operating expenses exclude the effect of stock-based compensation and related expenses. 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. See the GAAP to Non-GAAP reconciliations in the tables set forth below.

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|:---|
| **RECONCILIATION OF NET INCOME TO NON-GAAP NET INCOME** |
| (Unaudited, in thousands, except per share amounts) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Net income | $178274 | $144430 | $445791 | $337337 |
| Adjustments to reconcile net income to non-GAAP net income: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense, net | 423 | 141 | 698 | 294 |
| Tax effect | (12778) | 1479 | 692 | (4149) |
| Non-GAAP net income | $227114 | $198786 | $623107 | $491354 |
| Non-GAAP net income per share: |  |  |  |  |
| Basic | $4.74 | $4.08 | $13.01 | $10.09 |
| Diluted | $4.73 | $4.06 | $12.98 | $10.04 |
| Shares used in the calculation of non-GAAP net income per share: |  |  |  |  |
| Basic | 47898 | 48757 | 47879 | 48692 |
| Diluted | 48042 | 48964 | 48022 | 48945 |

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|:---|
| **RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN** |
| (Unaudited, in thousands) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Gross profit | $406228 | $343443 | $1125474 | $876462 |
| Gross margin | 55.1% | 55.4% | 55.2% | 55.3% |
| Adjustments to reconcile gross profit to non-GAAP gross profit: |  |  |  |  |
| Stock-based compensation and related expenses | 1917 | 1695 | 5538 | 5230 |
| Amortization of acquisition-related intangible assets | 287 | 287 | 861 | 884 |
| Deferred compensation plan expense | 500 | 543 | 942 | 1083 |
| Non-GAAP gross profit | $408932 | $345968 | $1132815 | $883659 |
| Non-GAAP gross margin | 55.5% | 55.8% | 55.5% | 55.7% |

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|:---|
| **RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES** |
| (Unaudited, in thousands) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total operating expenses | $211045 | $179415 | $596774 | $500411 |
| Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: |  |  |  |  |
| Stock-based compensation and related expenses | (58958) | (50721) | (169428) | (151659) |
| Amortization of acquisition-related intangible assets | (33) | (33) | (99) | (99) |
| Deferred compensation plan expense | (3715) | (3492) | (7778) | (8391) |
| Non-GAAP operating expenses | $148339 | $125169 | $419469 | $340262 |

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|:---|
| **RECONCILIATION OF OPERATING INCOME TO NON-GAAP OPERATING INCOME** |
| (Unaudited, in thousands) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total operating income | $195183 | $164028 | $528700 | $376051 |
| Adjustments to reconcile total operating income to non-GAAP total operating income: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense | 4215 | 4035 | 8720 | 9474 |
| Non-GAAP operating income | $260593 | $220799 | $713346 | $543397 |

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|:---|
| **RECONCILIATION OF OTHER INCOME, NET, TO NON-GAAP OTHER INCOME, NET** |
| (Unaudited, in thousands) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total other income, net | $10392 | $10278 | $27743 | $27330 |
| Adjustments to reconcile other income, net to non-GAAP other income, net: |  |  |  |  |
| Deferred compensation plan income | (3792) | (3895) | (8022) | (9180) |
| Non-GAAP other income, net | $6600 | $6383 | $19721 | $18150 |

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|:---|
| **RECONCILIATION OF INCOME BEFORE INCOME TAXES TO NON-GAAP INCOME BEFORE INCOME TAXES** |
| (Unaudited, in thousands) |

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** <br> **September 30,** | **Three Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** | **Nine Months Ended** <br> **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Total income before income taxes | $205575 | $174306 | $556443 | $403381 |
| Adjustments to reconcile income before income taxes to non-GAAP income before income taxes: |  |  |  |  |
| Stock-based compensation and related expenses | 60875 | 52416 | 174966 | 156889 |
| Amortization of acquisition-related intangible assets | 320 | 320 | 960 | 983 |
| Deferred compensation plan expense, net | 423 | 141 | 698 | 294 |
| Non-GAAP income before income taxes | $267193 | $227183 | $733067 | $561547 |

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|:---|
| **2025 FOURTH QUARTER OUTLOOK** |
| **RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN** |
| (Unaudited) |

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| | | |
|:---|:---|:---|
|  | **Three Months Ending** | **Three Months Ending** |
|  | **December 31, 2025** | **December 31, 2025** |
|  | **Low** | **High** |
| Gross margin | 54.9% | 55.5% |
| Adjustment to reconcile gross margin to non-GAAP gross margin: |  |  |
| Stock-based compensation and other expenses | 0.3% | 0.3% |
| Non-GAAP gross margin | 55.2% | 55.8% |

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|:---|
| **RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES** |
| (Unaudited, in thousands) |

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| | | |
|:---|:---|:---|
|  | **Three Months Ending** | **Three Months Ending** |
|  | **December 31, 2025** | **December 31, 2025** |
|  | **Low** | **High** |
| Operating expenses | $206800 | $212800 |
| Adjustments to reconcile operating expenses to non-GAAP operating expenses: |  |  |
| Stock-based compensation and other expenses | (61300) | (63300) |
| Non-GAAP operating expenses | $145500 | $149500 |

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