3 unchanged sentences
2004 Employee Stock Purchase Plan, amended and restated, and upon vesting of RSUs.
−Removed: The following table summarizes the adoption of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended March 31, 2026:
−Removed: Name and Title
−Removed: Adoption Date
−Removed: Plan Duration
−Removed: Intended Sale Amount (in shares)
+Added: The following table summarizes the adoption of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended June 30, 2026:
+Added: Name and Title Adoption Date Plan Duration Intended Sale Amount (in shares)
Deming Xiao , Executive Vice President, Global Operations
−Removed: February 20, 2026
−Removed: Through February 19, 2027
−Removed: Up to 120,000
−Removed: The following table summarizes the termination of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended March 31, 2026:
−Removed: Name and Title
−Removed: Termination Date
−Removed: Original Plan Duration
−Removed: Intended Sale Amount (in shares)
−Removed: Sold Amount (in shares)
+Added: May 19, 2026 Through May 19, 2027
+Added: Michael Hsing , President, Chief Executive Officer and Director
+Added: May 29, 2026 Through May 29, 2027
+Added: Saria Tseng , Executive Vice President, Strategic Corporate Development, General Counsel and Corporate Secretary
+Added: May 29, 2026 Through May 29, 2027
+Added: The following table summarizes the termination of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended June 30, 2026:
+Added: Name and Title Termination Date Original Plan Duration Intended Sale Amount (in shares) Sold Amount (in shares)
Deming Xiao , Executive Vice President, Global Operations
−Removed: February 9, 2026
−Removed: Through November 13, 2026
−Removed: During the three months ended March 31, 2026, no trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) were modified, and no other written trading arrangements that are not intended to qualify for the Rule 10b5-1(c) affirmative defense were adopted, modified, or terminated.
−Removed: Transition Agreement with former Chief Financial Officer.
+Added: May 6, 2026 Through February 19, 2027
+Added: Up to 120,000
+Added: During the three months ended June 30, 2026, no trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) were modified, and no other written trading arrangements that are not intended to qualify for the Rule 10b5-1(c) affirmative defense were adopted , modified, or terminated .
31.1 Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
−Removed: Certification of Interim Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
+Added: 31.2 C ertification of Interim Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1* Certification of Chief Executive Officer and Interim Chief Financial Officer pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
−Removed: Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
−Removed: Inline XBRL Taxonomy Extension Schema Document
−Removed: Inline XBRL Taxonomy Extension Calculation Linkbase Document
−Removed: Inline XBRL Taxonomy Extension Definition Linkbase Document
−Removed: Inline XBRL Taxonomy Extension Label Linkbase Document
−Removed: Inline XBRL Taxonomy Extension Presentation Linkbase Document
+Added: 101.INS Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
+Added: 101.SCH Inline XBRL Taxonomy Extension Schema Document
+Added: 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document
+Added: 101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document
+Added: 101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document
+Added: 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document
104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
−Removed: Management contract or compensatory plan or arrangement.
+Added: ____________________________
* This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.
2 unchanged sentences
MONOLITHIC POWER SYSTEMS, INC.
+Added: August 5, 2026
/s/ Robert Dean
3 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.