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 September 30, 2025:
+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 March 31, 2026:
Name and Title
2 unchanged sentences
Intended Sale Amount (in shares)
−Removed: Lee , Director
−Removed: August 25, 2025
−Removed: Through August 31, 2026
−Removed: Michael Hsing , President, Chief Executive Officer and Director
−Removed: August 28, 2025
−Removed: Through August 31, 2026
+Added: Deming Xiao , Executive Vice President, Global Operations
+Added: February 20, 2026
+Added: Through February 19, 2027
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 September 30, 2025:
+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 March 31, 2026:
Name and Title
4 unchanged sentences
Deming Xiao , Executive Vice President, Global Operations
−Removed: August 5, 2025
−Removed: Through February 27, 2026
−Removed: Up to 160,000
−Removed: During the three months ended September 30, 2025, 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.
+Added: February 9, 2026
+Added: Through November 13, 2026
+Added: 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.
+Added: Transition Agreement with former Chief Financial Officer.
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 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.
−Removed: Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C.
+Added: 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: 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.
6 unchanged sentences
Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
+Added: Management contract or compensatory plan or arrangement.
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.
−Removed: November 5, 2025
−Removed: Bernie Blegen
−Removed: Bernie Blegen
−Removed: Executive Vice President and Chief Financial Officer
+Added: /s/ Robert Dean
+Added: Interim Chief Financial Officer
(Duly Authorized Officer and Principal
1 unchanged sentence
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.