{"transactions":[{"id":911650,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-10T23:57:08.000Z","date":"2026-02-06","kind":"sale","planned":false,"acquired":false,"shares":21725,"price":1171.1637,"value":25443531.3825,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan."}],"balance_after":82353,"source":{"system":"sec-edgar","filing":"0001214659-26-001448","document":"marketforms-72090.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001448/marketforms-72090.xml","form_type":"4"}},{"id":917589,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-06T00:35:27.000Z","date":"2026-02-03","kind":"grant","planned":false,"acquired":true,"shares":38745,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 7, 2023, the reporting person was granted performance-based restricted stock units (\"PSUs\") subject to the achievement of performance conditions over a three-year performance period. On February 3, 2026, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the PSUs, which resulted in 38,745 shares being awarded to the reporting person, subject to tax withholdings. All of the shares fully vested and were released on February 3, 2026, pursuant to the grant agreement."}],"balance_after":104078,"source":{"system":"sec-edgar","filing":"0001214659-26-001255","document":"marketforms-72009.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001255/marketforms-72009.xml","form_type":"4"}},{"id":919288,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1139.49,"value":91159.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F14","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,139.44 to $1,139.54. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F15","text":"Ending balance has been adjusted for a one share rounding difference."}],"balance_after":65333,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919287,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1137.81,"value":91024.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":65412,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919286,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":120,"price":1136.35,"value":136362.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F13","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,136.18 to $1,136.69. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":65492,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919285,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":120,"price":1135.49,"value":136258.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,135.09 to $1,135.71. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":65612,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919284,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":241,"price":1134.41,"value":273392.81,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,134.00 to $1,134.78. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":65732,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919283,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":379,"price":1133.47,"value":429585.13,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,133.00 to $1,133.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":65973,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919282,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":322,"price":1132.67,"value":364719.74,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,132.33 to $1,132.84. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":66352,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919281,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":198,"price":1131.7,"value":224076.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,131.38 to $1,131.91. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":66674,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919280,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":320,"price":1130.48,"value":361753.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,130.18 to $1,130.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":66872,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919279,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":240,"price":1129.28,"value":271027.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,129.07 to $1,129.60. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":67192,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919278,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":240,"price":1128.43,"value":270823.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,128.32 to $1,128.64. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":67432,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919277,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1127.39,"value":90191.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,127.28 to $1,127.49. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":67672,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919276,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":200,"price":1126.58,"value":225316.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,126.50 to $1,126.71. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":67752,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919275,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":40,"price":1122.56,"value":44902.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":67952,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919274,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1120.77,"value":89661.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":67992,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919273,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":40,"price":1117.11,"value":44684.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":68072,"source":{"system":"sec-edgar","filing":"0001214659-26-001149","document":"marketforms-71999.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465926001149/marketforms-71999.xml","form_type":"4"}},{"id":919272,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2026-02-04T15:10:11.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":220,"price":1110.58,"value":244327.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,110.14 to $1,110.68. 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The prices for the transactions reported on this line range from $1,027.03 to $1,027.89. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":75436,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008036,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":43,"price":1025.91,"value":44114.13,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,025.00 to $1,025.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":75636,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008035,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":208,"price":1024.86,"value":213170.88,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,024.02 to $1,024.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":75679,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008034,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":291,"price":1023.32,"value":297786.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,023.07 to $1,023.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":75887,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008033,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":40,"price":1022.28,"value":40891.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":76178,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008032,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":168,"price":1021.28,"value":171575.04,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,021.04 to $1,021.32. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":76218,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008031,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":160,"price":1020.3,"value":163248.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,020.20 to $1,020.40. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":76386,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008030,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":181,"price":1019.49,"value":184527.69,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,019.10 to $1,019.68. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":76546,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008029,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":180,"price":1018.01,"value":183241.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":76727,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008028,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":6,"price":1017.78,"value":6106.68,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":76907,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008027,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1016.51,"value":81320.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,016.43 to $1,016.59. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":76913,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008026,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":135,"price":1014.47,"value":136953.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,014.12 to $1,014.64. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":76993,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1008025,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-11-05T00:31:34.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":204,"price":1013.62,"value":206778.48,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,013.45 to $1,013.75. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":77128,"source":{"system":"sec-edgar","filing":"0001214659-25-015933","document":"marketforms-71210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015933/marketforms-71210.xml","form_type":"4"}},{"id":1010573,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-31T20:45:55.000Z","date":"2025-10-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":48298,"price":1096.63,"value":52965035.74,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales transaction reported in this Form 4 represents shares of common stock withheld by the Company to satisfy the income tax obligations in connection with the earnout and vesting of the market-based restricted stock units granted in October 2022, previously reported in a Form 4."}],"balance_after":77332,"source":{"system":"sec-edgar","filing":"0001214659-25-015709","document":"marketforms-71175.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015709/marketforms-71175.xml","form_type":"4"}},{"id":1012538,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-29T01:38:17.000Z","date":"2025-10-25","kind":"grant","planned":false,"acquired":true,"shares":87690,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 25, 2022, the reporting person was granted market-based restricted stock units (\"MSUs\") subject to the achievement of five stock price targets and relative total stockholder return percentile rank over a three-year performance and vesting period. On October 25, 2025, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the MSUs, which resulted in 87,690 shares being awarded to the reporting person. All of the shares fully vested on October 25, 2025, pursuant to the grant agreement."}],"balance_after":125630,"source":{"system":"sec-edgar","filing":"0001214659-25-015477","document":"marketforms-71127.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925015477/marketforms-71127.xml","form_type":"4"}},{"id":1029204,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":160,"price":917.17,"value":146747.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $917.08 to $917.28. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F12","text":"Ending balance includes 1 share acquired on August 15, 2025 through the Company's qualified ESPP program."}],"balance_after":37940,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029203,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":580,"price":916.37,"value":531494.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $916.09 to $916.49. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":38099,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029202,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":440,"price":915.43,"value":402789.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $915.01 to $915.68. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":38679,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029201,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":390,"price":914.71,"value":356736.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $914.59 to $914.77. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":39119,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029200,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":138,"price":913.87,"value":126114.06,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $913.84 to $913.87. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":39509,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029199,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":676,"price":912.73,"value":617005.48,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $912.39 to $912.82. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":39647,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029198,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":65,"price":911.27,"value":59232.55,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $911.04 to $911.66. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":40323,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029197,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":80,"price":909.52,"value":72761.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $909.22 to $909.82. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":40388,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029196,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":250,"price":907.36,"value":226840.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $907.30 to $907.37. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":40468,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029195,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":115,"price":905.37,"value":104117.55,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $905.35 to $905.40. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":40718,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029194,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":60,"price":904,"value":54240.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":40833,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029193,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":40,"price":903.82,"value":36152.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":40893,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1029192,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-10-02T00:51:22.000Z","date":"2025-10-01","kind":"sale","planned":true,"acquired":false,"shares":6,"price":902.61,"value":5415.66,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":40933,"source":{"system":"sec-edgar","filing":"0001214659-25-014464","document":"marketforms-70888.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925014464/marketforms-70888.xml","form_type":"4"}},{"id":1049454,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":126,"price":822.59,"value":103646.34,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $822.31 to $822.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":40939,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049453,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":200,"price":821.75,"value":164350.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $821.64 to $821.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":41065,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049452,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":200,"price":820.7,"value":164140.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $820.50 to $820.88. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":41265,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049451,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":100,"price":818.44,"value":81844.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."}],"balance_after":41465,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049450,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":574,"price":816.47,"value":468653.78,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $816.20 to $816.76. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":41565,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049449,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":400,"price":815.39,"value":326156.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $815.10 to $815.74. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":42139,"source":{"system":"sec-edgar","filing":"0001214659-25-013303","document":"marketforms-70492.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1415033/000121465925013303/marketforms-70492.xml","form_type":"4"}},{"id":1049448,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":67027,"kind":"person","name":"BLEGEN THEODORE","position":1,"cik":"0001415033","reported_name":"BLEGEN THEODORE","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2025-09-03T22:39:25.000Z","date":"2025-09-02","kind":"sale","planned":true,"acquired":false,"shares":200,"price":814.75,"value":162950.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $814.61 to $814.88. 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The prices for the transactions reported on this line range from $806.25 to $806.89. 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