Monolithic Power Systems

Latest Schedule 13D/13G filing per holder. Holders that reported falling below 5% are not shown. Index funds usually report once a year.

No 5% holder filings parsed yet for this company.

Open-market purchases and sales reported on Form 4. Grants, option exercises and tax withholding are excluded.

Every 8-K with Item 5.02 (departure, election or appointment of directors and officers). The text is the first paragraph of the item.

1. Oct 29, 2026

   Appointment of Chief Financial Officer On October 27, 2026, the Board of Directors of the Company (“the Board”) appointed Tony Balow, age 56, as Vice President, Chief Financial Officer, effective immediately. Mr. Balow served as the Company’s Vice President of Finance from September 2023 to October 2026. Prior to joining the Company, Mr. Balow spent 23 years at Intel, a global semiconductor company, and held a number of senior positions. Mr. Balow holds a Bachelor of Science and a Master of Science in Aerospace, Aeronautical and Astronautical Engineering from the University of Illinois Urbana-Champaign, and a Master of Business Administration from the University of Arizona. There are no arrangements or understandings between Mr. Balow and any other person pursuant to which he was appointed as the Company’s Chief Financial Officer. Mr.

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2. Feb 5, 2026

   (b) Departure of Chief Financial Officer On February 3, 2026, Bernie Blegen informed the Company’s Board of Directors (the “Board”) of his intention to retire from his position as Executive Vice President and Chief Financial Officer. Mr. Blegen will continue in his role until the issuance of the Company’s 2025 annual report on Form 10-K (the “Effective Date”). Mr. Blegen will remain with the Company after his retirement to ensure a smooth transition with his eventual successor. (c) Appointment of Interim Chief Financial Officer On February 3, 2026, the Board appointed Rob Dean, the Company’s Corporate Controller, as interim Chief Financial Officer effective upon the Effective Date. Mr.

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3. Oct 22, 2024

   On October 21, 2024, Mr. James C. Moyer resigned from the Board of Directors (the “Board”) of Monolithic Power Systems, Inc. (the “Company”), and as a result, the Board decreased the total number of its authorized directors from eight to seven. Mr. Moyer’s resignation from the Board is not due to any disagreement with the Company, the Board or management of the Company. To achieve a more equal balance of membership among the classes of directors of the Company, the Board has reduced the total number of authorized directors in Class II to two, increased the total number of authorized directors in Class I to two and appointed Mr. Jeff Zhou as a Class I director with a term set to expire at the 2026 annual meeting of stockholders. On October 21, 2024, Mr. Zhou resigned as a Class II director, effective immediately prior to his reappointment to the Board as a Class I director.

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4. Jun 15, 2023

   In April 2023, the Board of Directors (the “Board”) of Monolithic Power Systems, Inc. (the “Company”) approved, subject to stockholder approval, the amendment and restatement of the Monolithic Power Systems, Inc. 2004 Employee Stock Purchase Plan (the “Amended 2004 ESPP”). As described below under

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5. Feb 8, 2023

   (d) Appointment of a Director On February 7, 2023, the Board of Directors (the “Board”) of the Company appointed Eileen Wynne to serve as a member of the Board, effective immediately. Ms. Wynne was appointed to serve as a Class II director whose term will expire at the annual meeting of stockholders to be held in 2024. Ms. Wynne was not appointed to serve on any committees of the Board in connection with her initial appointment as a director. Eileen Wynne, 56, has served as interim Chief Financial Officer of IDEX Biometrics ASA (“IDEX”), a provider of fingerprint identification technologies, since August 2022, and supported IDEX on a consulting basis since December 2020. From November 1999 to June 2019, Ms. Wynne held various managerial and senior roles at Analog Devices, Inc.

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6. May 28, 2021

   (d) Appointment of a New Director On May 27, 2021, the Board of Directors (the “Board”) of Monolithic Power Systems, Inc. (the “Company”) appointed Carintia Martinez to serve as a member of the Board, effective immediately. Ms. Martinez was appointed as a Class III director whose term will expire at the annual meeting of stockholders to be held in 2022. Ms. Martinez was not appointed to serve on any committees of the Board in connection with her initial appointment as a director. Ms. Martinez, 55, has served as Vice President, Chief Information Officer of Thales Alenia Space, a European aerospace manufacturer specializing in satellite systems, since January 2018. From February 2008 to December 2017, Ms.

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7. Jun 12, 2020

   (e) A mendment and Restatement of the Amended Monolithic Power Systems, Inc. 2014 Equity Incentive Plan (the “Amended and Restated 2014 Equity Plan”) The Board of Directors of Monolithic Power Systems, Inc. (the “Company”) previously approved, subject to stockholder approval, the Amended and Restated 2014 Equity Plan. As described below under

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8. Apr 24, 2018

   To achieve a more equal balance of membership among the classes of directors of Monolithic Power Systems, Inc. (the “Company”), the board of directors (the “Board”) of the Company has determined to move one of the Company’s current directors from Class III to Class II. On April 24, 2018, Mr. Eugene Elmiger resigned as a Class III Director, effective as of his reappointment to the Board as a Class II Director. For all other purposes, Mr. Elmiger’s service on the Board is deemed to have continued uninterrupted. The Board now consists of two Class I directors whose term will expire at the annual meeting of stockholders in 2020; two Class II directors whose term will expire at the annual meeting of stockholders in 2018; and two Class III directors whose term will expire at the annual meeting of stockholders in 2019. The resignation and reappointment of Mr.

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9. Jul 22, 2016

   (b) Departure of Director. On July 19, 2016, Karen A. Smith Bogart resigned from the Board of Directors (the “ Board ”) of Monolithic Power Systems (“ MPS ”) and all committees thereof, effective immediately. Dr. Smith Bogart’s resignation from the Board is not due to any disagreement with MPS, the Board or management of MPS. As a result of Dr. Smith Bogart’s resignation, the Board approved the acceleration of vesting of 2,181 shares of her outstanding restricted stock units on July 19, 2016. (c) Appointment of Chief Financial Officer. On July 19, 2016, MPS appointed Bernie Blegen as its new chief financial officer, effective immediately. Mr. Blegen, 58, has served as MPS’ interim chief financial officer since March 2016. From August 2011 to March 2016, Mr. Blegen served as MPS’ corporate controller. Prior to joining MPS, Mr.

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10. Feb 23, 2016

    Director or officer change (Item 5.02). Open the filing for details.

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Proxy statements (DEF 14A): 2026 · 2025 · 2024 · 2023 · 2022 · 2021

From the company's 10-K XBRL data (SEC companyfacts).

People who stopped filing as an insider of this company. “Last filing” is the last Form 3/4/5, an upper bound on when they left.