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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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):
March 20, 2025

MONOLITHIC POWER SYSTEMS, INC.
(Exact name of registrant as specified in its charter)

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

5808 Lake Washington Blvd. NE, Kirkland, Washington (Address of principal executive offices) | 98033 (Zip Code)

(425) 296-9956
(Registrant’s telephone number, including area code)

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:

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

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. ☐

Item 7.01 Regulation FD Disclosure.
As previously announced, on March 20, 2025, Monolithic Power Systems, Inc. (the “Company”) will host an Analyst Day at 9:00 am Pacific Time. During the course of the event, management will discuss the Company’s corporate strategy, business and product updates, and financial metrics. The event will be webcast live at https://mpsic.zoom.us/j/98462171986 (meeting ID: 984-6217-1986). The presentations to be used by the Company in the event are furnished as Exhibit 99.1.
In addition, on March 20, 2025, the Company issued a press release updating certain financial guidance for the quarter ending March 31, 2025. A copy of the press release is furnished as Exhibit 99.2 to this report.
The information in this Item 7.01, including Exhibit 99.1 and Exhibit 99.2, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section and shall not be deemed incorporated by reference into any registration statement or other document filed pursuant to 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.

Exhibit |  | Description
99.1 |  | Monolithic Power Systems, Inc. Analyst Day Presentation, dated March 20, 2025.
99.2 |  | Monolithic Power Systems, Inc. Press Release, dated March 20, 2025.
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.

Date: March 20, 2025 | By: | /s/ T. Bernie Blegen |
|  | T. Bernie Blegen |
|  | Executive Vice President and Chief Financial Officer |