{"transactions":[{"id":4635024,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":130,"price":1356.94,"value":176402.2,"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 05/29/2026."},{"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 $1,356.78 to $1,357.00.  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":818264,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635023,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":10967,"price":1351.43,"value":14821132.81,"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 05/29/2026."},{"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 $1,350.84 to $1,355.11.  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":818394,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635022,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":6343,"price":1347.15,"value":8544972.45,"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 05/29/2026."},{"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 $1,345.66 to $1,350.47.  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":829361,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635021,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":5783,"price":1343.76,"value":7770964.08,"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 05/29/2026."},{"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 $1,340.69 to $1,345.65.  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":835704,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635020,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":2949,"price":1338.66,"value":3947708.34,"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 05/29/2026."},{"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 $1,335.68 to $1,340.66.  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":841487,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635019,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":1111,"price":1333.34,"value":1481340.74,"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 05/29/2026."},{"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 $1,330.65 to $1,335.51.  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":844436,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635018,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":2121,"price":1328.54,"value":2817833.34,"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 05/29/2026."},{"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 $1,325.65 to $1,330.62.  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":845547,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":4635017,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-09-30T21:21:16.000Z","date":"2026-09-28","kind":"sale","planned":true,"acquired":false,"shares":596,"price":1323.31,"value":788692.76,"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 05/29/2026."},{"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 $1,320.64 to $1,325.61.  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":"F2","text":"Ending balance includes 1 share acquired on August 17, 2026, through the Company's qualified ESPP program."}],"balance_after":847668,"source":{"system":"sec-edgar","filing":"0001214659-26-012375","document":"marketforms-74049.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926012375/marketforms-74049.xml","form_type":"4"}},{"id":769809,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":130,"price":1521.43,"value":197785.9,"ownership":{"direct":true},"footnotes":[{"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 $1,521.33 to $1,521.56.  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":848263,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769808,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":352,"price":1518.15,"value":534388.8,"ownership":{"direct":true},"footnotes":[{"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 $1,516.26 to $1,519.25.  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":848393,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769807,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":551,"price":1513.11,"value":833723.61,"ownership":{"direct":true},"footnotes":[{"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 $1,510.68 to $1,515.44.  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":848745,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769806,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":3769,"price":1507.7,"value":5682521.3,"ownership":{"direct":true},"footnotes":[{"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 $1,505.70 to $1,510.67.  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":849296,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769805,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":2929,"price":1503.05,"value":4402433.45,"ownership":{"direct":true},"footnotes":[{"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 $1,500.75 to $1,505.70.  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":853065,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769804,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":608,"price":1499.46,"value":911671.68,"ownership":{"direct":true},"footnotes":[{"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 $,1495.74 to $1,500.72.  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":855994,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769803,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":862,"price":1491.48,"value":1285655.76,"ownership":{"direct":true},"footnotes":[{"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 $1,490.17 to $1,494.10.  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":856602,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769802,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":6688,"price":1486.76,"value":9943450.88,"ownership":{"direct":true},"footnotes":[{"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 $1,484.95 to $1,489.73.  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":857464,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769801,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":5737,"price":1482.51,"value":8505159.87,"ownership":{"direct":true},"footnotes":[{"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 $1,479.99 to $1,484.93.  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":864152,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769800,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":4082,"price":1476.96,"value":6028950.72,"ownership":{"direct":true},"footnotes":[{"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 $1,474.95 to $1,479.85.  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":869889,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769799,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":5049,"price":1472.84,"value":7436369.16,"ownership":{"direct":true},"footnotes":[{"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 $1,469.95 to $1,474.94.  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":873971,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769798,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":5819,"price":1467.62,"value":8540080.78,"ownership":{"direct":true},"footnotes":[{"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 $1,464.97 to $1,469.94.  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":879020,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":769797,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-05-21T00:10:31.000Z","date":"2026-05-18","kind":"sale","planned":false,"acquired":false,"shares":3424,"price":1462.61,"value":5007976.64,"ownership":{"direct":true},"footnotes":[{"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 $1,459.96 to $1,464.86.  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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Ending balance includes 29 shares acquired on February 17, 2026 through the Company's qualified ESPP program."}],"balance_after":884839,"source":{"system":"sec-edgar","filing":"0001214659-26-006625","document":"marketforms-73205.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006625/marketforms-73205.xml","form_type":"4"}},{"id":900687,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":1440,"price":1217.12,"value":1752652.8,"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 08/28/2025."},{"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 $1,214.09 to $1,218.82. 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":888234,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900686,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":1240,"price":1210.11,"value":1500536.4,"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 08/28/2025."},{"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 $1,207.93 to $1,212.36. 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":889674,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900685,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":3640,"price":1205.82,"value":4389184.8,"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 08/28/2025."},{"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 $1,202.70 to $1,207.63. 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":890914,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900684,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":1440,"price":1200.81,"value":1729166.4,"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 08/28/2025."},{"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 $1,197.57 to $1,202.33. 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":894554,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900683,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":600,"price":1194.34,"value":716604.0,"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 08/28/2025."},{"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 $1,191.26 to $1,195.35. 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":895994,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900682,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":160,"price":1188.23,"value":190116.8,"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 08/28/2025."},{"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 $1,185.94 to $1,190.48. 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":896594,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900681,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":480,"price":1180.79,"value":566779.2,"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 08/28/2025."},{"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 $1,179.43 to $1,182.24. 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":896754,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900680,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":200,"price":1173.39,"value":234678.0,"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 08/28/2025."},{"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 $1,172.82 to $1,175.07. 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":897234,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900679,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":2076,"price":1168.8,"value":2426428.8,"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 08/28/2025."},{"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 $1,167.43 to $1,172.17. 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":897434,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900678,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":4001,"price":1164.92,"value":4660844.92,"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 08/28/2025."},{"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 $1,162.42 to $1,167.20 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":899510,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900677,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":4992,"price":1159.84,"value":5789921.28,"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 08/28/2025."},{"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 $1,157.38 to $1,162.38. 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":903511,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":900676,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-17T22:08:28.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":12731,"price":1155.71,"value":14713344.01,"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 08/28/2025."},{"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 $1,152.31 to $1,157.31. 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":908503,"source":{"system":"sec-edgar","filing":"0001214659-26-002084","document":"marketforms-72189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926002084/marketforms-72189.xml","form_type":"4"}},{"id":904905,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":649,"price":1202.28,"value":780279.72,"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 8/25/2025."},{"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 $1,200.46 to $1,203.86. 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":921234,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904904,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":14578,"price":1197.2,"value":17452781.6,"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 8/25/2025."},{"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 $1,195.44 to $1,200.37. 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":921883,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904903,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":6079,"price":1192.67,"value":7250240.93,"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 8/25/2025."},{"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 $1,190.39 to $1,195.37. 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":936461,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904902,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":2104,"price":1188.17,"value":2499909.68,"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 8/25/2025."},{"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 $1,185.33 to $1,190.26. 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":942540,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904901,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":1542,"price":1182.82,"value":1823908.44,"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 8/25/2025."},{"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 $1,180.29 to $1,185.29. 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":944644,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904900,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":2799,"price":1177.67,"value":3296298.33,"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 8/25/2025."},{"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 $1,175.27 to $1,180.19. 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":946186,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904899,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":1987,"price":1172.92,"value":2330592.04,"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 8/25/2025."},{"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 $1,170.10 to $1,175.09. 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":948985,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904898,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":1533,"price":1167.62,"value":1789961.46,"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 8/25/2025."},{"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 $1,166.00 to $1,169.96. 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":950972,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904897,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":1366,"price":1163.71,"value":1589627.86,"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 8/25/2025."},{"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 $1,160.70 to $1,165.64 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":952505,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":904896,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-13T22:11:33.000Z","date":"2026-02-11","kind":"sale","planned":true,"acquired":false,"shares":363,"price":1158.71,"value":420611.73,"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 8/25/2025."},{"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 $1,155.64 to $1,160.62 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":953871,"source":{"system":"sec-edgar","filing":"0001214659-26-001738","document":"marketforms-72131.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001738/marketforms-72131.xml","form_type":"4"}},{"id":907394,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":280,"price":1197.26,"value":335232.8,"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 08/28/2025."}],"balance_after":954234,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907393,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":880,"price":1176.04,"value":1034915.2,"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 08/28/2025."},{"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 $1,172.65 to $1,177.08. 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":954514,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907392,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":360,"price":1161.41,"value":418107.6,"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 08/28/2025."},{"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 $1,159.96 to $1,163.96. 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":955394,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907391,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":694,"price":1154.96,"value":801542.24,"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 08/28/2025."},{"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 $1,154.09 to $1,155.86. 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":955754,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907390,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":1215,"price":1151.11,"value":1398598.65,"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 08/28/2025."},{"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 $1,149.04 to $1,154.00. 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":956448,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907389,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":3864,"price":1145.9,"value":4427757.6,"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 08/28/2025."},{"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 $1,144.03 to $1,149.00. 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":957663,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907388,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":16080,"price":1141.88,"value":18361430.4,"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 08/28/2025."},{"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 $1,138.96 to $1,143.96. 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":961527,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907387,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":6325,"price":1136.75,"value":7189943.75,"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 08/28/2025."},{"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 $1,133.92 to $1,138.90. 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":977607,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":907386,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-12T19:45:22.000Z","date":"2026-02-10","kind":"sale","planned":true,"acquired":false,"shares":4302,"price":1132.01,"value":4869907.02,"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 08/28/2025."},{"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 $1,128.88 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":983932,"source":{"system":"sec-edgar","filing":"0001214659-26-001587","document":"marketforms-72116.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001587/marketforms-72116.xml","form_type":"4"}},{"id":911617,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-10T23:56:26.000Z","date":"2026-02-06","kind":"sale","planned":false,"acquired":false,"shares":54923,"price":1171.1637,"value":64323823.8951,"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":988234,"source":{"system":"sec-edgar","filing":"0001214659-26-001447","document":"marketforms-72091.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001447/marketforms-72091.xml","form_type":"4"}},{"id":917567,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2026-02-06T00:07:34.000Z","date":"2026-02-03","kind":"grant","planned":false,"acquired":true,"shares":136825,"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 136,825 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":1043157,"source":{"system":"sec-edgar","filing":"0001214659-26-001253","document":"marketforms-72012.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001253/marketforms-72012.xml","form_type":"4"}},{"id":972519,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-12-11T21:03:37.000Z","date":"2025-12-09","kind":"gift","planned":false,"acquired":false,"shares":12337,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved a transfer of securities by gift from the reporting person's direct holdings to a 501(c)(3) foundation. The Company has determined that the reporting person does not have any management or investment control or any other pecuniary interest in the shares after the transfer. No funds were exchanged and no sale of shares occurred in the transfer."}],"balance_after":906332,"source":{"system":"sec-edgar","filing":"0001214659-25-017938","document":"marketforms-71501.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017938/marketforms-71501.xml","form_type":"4"}},{"id":1000078,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":987,"price":980.06,"value":967319.22,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F19","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 $980.00 to $980.25. 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":918669,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000077,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":633,"price":979.59,"value":620080.47,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F18","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 $979.59 to $979.60. 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":919656,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000076,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":298,"price":973.73,"value":290171.54,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F17","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 $973.45 to $973.84. 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":920289,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000075,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":461,"price":972.78,"value":448451.58,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F16","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 $972.05 to $972.98. 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":920587,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000074,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":59,"price":971.81,"value":57336.79,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F15","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 $971.74 to $971.96. 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":921048,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000073,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":728,"price":970.29,"value":706371.12,"ownership":{"direct":true},"footnotes":[{"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 $970.02 to $970.85. 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":921107,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000072,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":975,"price":969.62,"value":945379.5,"ownership":{"direct":true},"footnotes":[{"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 $969.14 to $969.98. 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":921835,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000071,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":2072,"price":968.37,"value":2006462.64,"ownership":{"direct":true},"footnotes":[{"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 $968.01 to $968.94. 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":922810,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000070,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":3024,"price":967.41,"value":2925447.84,"ownership":{"direct":true},"footnotes":[{"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 $967.00 to $967.93. 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":924882,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000069,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":6562,"price":966.45,"value":6341844.9,"ownership":{"direct":true},"footnotes":[{"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 $966.00 to $ 966.99. 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":927906,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000068,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":5619,"price":965.5,"value":5425144.5,"ownership":{"direct":true},"footnotes":[{"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 $965.00 to $965.98. 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":934468,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000067,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":3264,"price":964.47,"value":3148030.08,"ownership":{"direct":true},"footnotes":[{"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 $964.00 to $964.92. 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":940087,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000066,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":3552,"price":963.47,"value":3422245.44,"ownership":{"direct":true},"footnotes":[{"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 $963.00 to $963.99. 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":943351,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000065,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":2817,"price":962.61,"value":2711672.37,"ownership":{"direct":true},"footnotes":[{"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 $962.02 to $962.99. 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":946903,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000064,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":1904,"price":961.63,"value":1830943.52,"ownership":{"direct":true},"footnotes":[{"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 $961.07 to $961.98. 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":949720,"source":{"system":"sec-edgar","filing":"0001214659-25-016420","document":"marketforms-71265.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925016420/marketforms-71265.xml","form_type":"4"}},{"id":1000063,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-11-13T21:15:33.000Z","date":"2025-11-12","kind":"sale","planned":false,"acquired":false,"shares":403,"price":960.45,"value":387061.35,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price is the weighted average sale price for the transactions reported on this line. 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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 302,920 shares being awarded to the reporting person. 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The prices for the transactions reported on this line range from $831.00 to $831.87. 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":817312,"source":{"system":"sec-edgar","filing":"0001214659-25-012411","document":"marketforms-70302.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925012411/marketforms-70302.xml","form_type":"4"}},{"id":1063782,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":45632,"kind":"person","name":"Hsing Michael","position":1,"cik":"0001308676","reported_name":"Hsing Michael","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-08-18T21:36:32.000Z","date":"2025-08-15","kind":"sale","planned":false,"acquired":false,"shares":2100,"price":830.46,"value":1743966.0,"ownership":{"direct":true},"footnotes":[{"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 $830.01 to $830.97. 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