{"transactions":[{"id":1041,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-09-02T21:26:23.000Z","date":"2026-08-31","kind":"gift","planned":false,"acquired":true,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"C&T Family Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"2,000 shares were received by C&T Family Irrevocable Trust, of which the reporting person is a trustee, from the reporting person's direct holdings. No funds were exchanged and no sale of shares occurred in the transfer."}],"balance_after":2000,"source":{"system":"sec-edgar","filing":"0001214659-26-011363","document":"marketforms-73915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1312593/000121465926011363/marketforms-73915.xml","form_type":"4"}},{"id":1040,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-09-02T21:26:23.000Z","date":"2026-08-31","kind":"gift","planned":false,"acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"2,000 shares were transferred from the reporting person's direct holdings to C&T Family Irrevocable Trust, of which the reporting person is a trustee. No funds were exchanged and no sale of shares occurred in the transfer."}],"balance_after":142218,"source":{"system":"sec-edgar","filing":"0001214659-26-011363","document":"marketforms-73915.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1312593/000121465926011363/marketforms-73915.xml","form_type":"4"}},{"id":758606,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-05-29T22:43:09.000Z","date":"2026-05-27","kind":"sale","planned":false,"acquired":false,"shares":7565,"price":1700,"value":12860500.0,"ownership":{"direct":true},"balance_after":144218,"source":{"system":"sec-edgar","filing":"0001214659-26-006933","document":"marketforms-73294.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006933/marketforms-73294.xml","form_type":"4"}},{"id":761561,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-05-27T21:07:11.000Z","date":"2026-05-22","kind":"sale","planned":false,"acquired":false,"shares":5000,"price":1586.43,"value":7932150.0,"ownership":{"direct":true},"balance_after":151783,"source":{"system":"sec-edgar","filing":"0001214659-26-006798","document":"marketforms-73255.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006798/marketforms-73255.xml","form_type":"4"}},{"id":761560,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-05-27T21:07:11.000Z","date":"2026-05-22","kind":"gift","planned":false,"acquired":false,"shares":200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares."}],"balance_after":156783,"source":{"system":"sec-edgar","filing":"0001214659-26-006798","document":"marketforms-73255.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926006798/marketforms-73255.xml","form_type":"4"}},{"id":810266,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":120,"price":1321.94,"value":158632.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,321.50 to $1,322.56. 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":156983,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810265,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":840,"price":1319.25,"value":1108170.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,316.25 to $1,321.04. 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":157103,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810264,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":4244,"price":1312.82,"value":5571608.08,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,310.27 to $1,315.08. 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":157943,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810263,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":1279,"price":1308.3,"value":1673315.7,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,305.08 to $1,310.00. 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":162187,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810262,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":800,"price":1302.52,"value":1042016.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,299.99 to $1,304.82. 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":163466,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810261,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":400,"price":1292.08,"value":516832.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,290.95 to $1,294.78. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":164266,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810260,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":120,"price":1287.12,"value":154454.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,284.26 to $1,289.24. 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":164666,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810259,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":240,"price":1279.55,"value":307092.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,277.78 to $1,281.49. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":164786,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810258,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":360,"price":1270.29,"value":457304.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,269.36 to $1,272.23. 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":165026,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":810257,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-10T16:46:56.000Z","date":"2026-04-08","kind":"sale","planned":true,"acquired":false,"shares":560,"price":1266.48,"value":709228.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,264.04 to $1,268.56. 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":165386,"source":{"system":"sec-edgar","filing":"0001214659-26-004535","document":"marketforms-72913.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004535/marketforms-72913.xml","form_type":"4"}},{"id":812394,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":1396,"price":1179.5,"value":1646582.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,178.53 to $1,180.83. 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":165946,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812393,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":1680,"price":1176.35,"value":1976268.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,173.31 to $1,178.29. 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":167342,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812392,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":2036,"price":1170.38,"value":2382893.68,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,168.24 to $ 1,172.42. 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":169022,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812391,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":684,"price":1165.66,"value":797311.44,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,163.16 to $1,168.12. 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":171058,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812390,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":560,"price":1159.62,"value":649387.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,156.58 to $1,161.42. 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":171742,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812389,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":480,"price":1149.05,"value":551544.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,147.58 to $1,152.19. 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":172302,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812388,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":556,"price":1144.42,"value":636297.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,141.91 to $ 1,146.02. 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":172782,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":812387,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-08T17:42:26.000Z","date":"2026-04-06","kind":"sale","planned":true,"acquired":false,"shares":244,"price":1139.96,"value":278150.24,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,136.69 to $1,141.64.  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":173338,"source":{"system":"sec-edgar","filing":"0001214659-26-004460","document":"marketforms-72903.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004460/marketforms-72903.xml","form_type":"4"}},{"id":816014,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-03T21:36:18.000Z","date":"2026-04-01","kind":"sale","planned":true,"acquired":false,"shares":292,"price":1136.99,"value":332001.08,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,136.47 to $1,137.71. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":173582,"source":{"system":"sec-edgar","filing":"0001214659-26-004341","document":"marketforms-72869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004341/marketforms-72869.xml","form_type":"4"}},{"id":816013,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-03T21:36:18.000Z","date":"2026-04-01","kind":"sale","planned":true,"acquired":false,"shares":188,"price":1135.91,"value":213551.08,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,135.41 to $1,136.26. 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":173874,"source":{"system":"sec-edgar","filing":"0001214659-26-004341","document":"marketforms-72869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004341/marketforms-72869.xml","form_type":"4"}},{"id":816012,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-03T21:36:18.000Z","date":"2026-04-01","kind":"sale","planned":true,"acquired":false,"shares":160,"price":1134.14,"value":181462.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,133.77 to $1,134.75. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":174062,"source":{"system":"sec-edgar","filing":"0001214659-26-004341","document":"marketforms-72869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004341/marketforms-72869.xml","form_type":"4"}},{"id":816011,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-03T21:36:18.000Z","date":"2026-04-01","kind":"sale","planned":true,"acquired":false,"shares":184,"price":1132.15,"value":208315.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,131.84 to $1,132.46. 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":174222,"source":{"system":"sec-edgar","filing":"0001214659-26-004341","document":"marketforms-72869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004341/marketforms-72869.xml","form_type":"4"}},{"id":816010,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-03T21:36:18.000Z","date":"2026-04-01","kind":"sale","planned":true,"acquired":false,"shares":576,"price":1131.24,"value":651594.24,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,130.82 to $1,131.76. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":174406,"source":{"system":"sec-edgar","filing":"0001214659-26-004341","document":"marketforms-72869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004341/marketforms-72869.xml","form_type":"4"}},{"id":822714,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":80,"price":1041.12,"value":83289.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,039.30 to $1,042.50. 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":174982,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822713,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":166,"price":1035.6,"value":171909.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,033.98 to $1,037.25. 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":175062,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822712,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":2440,"price":1029.21,"value":2511272.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,027.37 to $1,032.40. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":175228,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822711,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":2200,"price":1023,"value":2250600.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,020.71 to $1,025.36. 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":177668,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822710,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":3194,"price":1017.22,"value":3249000.68,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,013.83 to $1,018.85. 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":179868,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822709,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":3360,"price":1009.63,"value":3392356.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,008.00 to $1,012.65. 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":183062,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822708,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":9080,"price":1005.18,"value":9127034.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $1,003.06 to $1,007.85. 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":186422,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":822707,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-04-01T22:41:09.000Z","date":"2026-03-30","kind":"sale","planned":true,"acquired":false,"shares":5154,"price":1000.81,"value":5158174.74,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025."},{"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 $998.36 to $1,002.92. 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Ending balance includes 30 shares acquired on February 17, 2026 through the Company's qualified ESPP program."}],"balance_after":195502,"source":{"system":"sec-edgar","filing":"0001214659-26-004185","document":"marketforms-72823.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926004185/marketforms-72823.xml","form_type":"4"}},{"id":911620,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-02-10T23:58:30.000Z","date":"2026-02-06","kind":"sale","planned":false,"acquired":false,"shares":22875,"price":1171.1637,"value":26790369.6375,"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":200626,"source":{"system":"sec-edgar","filing":"0001214659-26-001450","document":"marketforms-72093.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001450/marketforms-72093.xml","form_type":"4"}},{"id":917568,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2026-02-06T00:29:56.000Z","date":"2026-02-03","kind":"grant","planned":false,"acquired":true,"shares":57170,"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 57,170 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":223501,"source":{"system":"sec-edgar","filing":"0001214659-26-001254","document":"marketforms-72010.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465926001254/marketforms-72010.xml","form_type":"4"}},{"id":957081,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-12-30T23:08:47.000Z","date":"2025-12-24","kind":"gift","planned":false,"acquired":true,"shares":1000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"C&T Discovery Foundation"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","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 reporting person is the president of the foundation and maintains management and investment control over the shares. No funds were exchanged and no sale of shares occurred in the transfer of the shares."}],"balance_after":1000,"source":{"system":"sec-edgar","filing":"0001214659-25-018632","document":"marketforms-71707.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925018632/marketforms-71707.xml","form_type":"4"}},{"id":957080,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-12-30T23:08:47.000Z","date":"2025-12-24","kind":"gift","planned":false,"acquired":false,"shares":1000,"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. No funds were exchanged and no sale of shares occurred in the transfer of the shares."}],"balance_after":166331,"source":{"system":"sec-edgar","filing":"0001214659-25-018632","document":"marketforms-71707.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925018632/marketforms-71707.xml","form_type":"4"}},{"id":986137,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":680,"price":930.48,"value":632726.4,"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 $930.01 to $930.98. 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":167331,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986136,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":2238,"price":929.29,"value":2079751.02,"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 $929.00 to $929.72. 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":168011,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986135,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":984,"price":928.6,"value":913742.4,"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 $928.40 to $928.98. 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":170249,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986134,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":1845,"price":927.41,"value":1711071.45,"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 $927.01 to $927.86. 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":171233,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986133,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":10360,"price":926.02,"value":9593567.2,"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 $926.00 to $926.63. 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":173078,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986132,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":1126,"price":925.55,"value":1042169.3,"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 $925.18 to $925.82. 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":183438,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986131,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":1327,"price":924.32,"value":1226572.64,"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 $924.00 to $924.83. 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":184564,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986130,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":1200,"price":923.54,"value":1108248.0,"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 $923.11 to $923.98. 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":185891,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986129,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:19:51.000Z","date":"2025-11-26","kind":"sale","planned":false,"acquired":false,"shares":240,"price":922.78,"value":221467.2,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","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 $922.42 to $922.94. 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":187091,"source":{"system":"sec-edgar","filing":"0001214659-25-017305","document":"marketforms-71373.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017305/marketforms-71373.xml","form_type":"4"}},{"id":986128,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":240,"price":912.3,"value":218952.0,"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 $912.12 to $912.48. 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":187331,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986127,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":324,"price":911.92,"value":295462.08,"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 $911.85 to $911.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":187571,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986126,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":359,"price":910.42,"value":326840.78,"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 $910.01 to $910.96. 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":187895,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986125,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":556,"price":909.35,"value":505598.6,"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 $909.02 to $909.74. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":188254,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986124,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":888,"price":908.49,"value":806739.12,"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 $908.02 to $908.89. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":188810,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986123,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":10200,"price":907.21,"value":9253542.0,"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 $907.20 to $907.73. 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":189698,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986122,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":272,"price":906.33,"value":246521.76,"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. 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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":199898,"source":{"system":"sec-edgar","filing":"0001214659-25-017303","document":"marketforms-71371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465925017303/marketforms-71371.xml","form_type":"4"}},{"id":986121,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2025-11-28T15:15:00.000Z","date":"2025-11-25","kind":"sale","planned":false,"acquired":false,"shares":160,"price":905.32,"value":144851.2,"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. 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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":201254,"source":{"system":"sec-edgar","filing":"0001214659-24-011783","document":"marketforms-66459.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465924011783/marketforms-66459.xml","form_type":"4"}},{"id":1462457,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common Stock","published_at":"2024-07-02T15:26:59.000Z","date":"2024-07-01","kind":"sale","planned":true,"acquired":false,"shares":600,"price":798.72,"value":479232.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","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 $798.64 to $798.74.  The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":201453,"source":{"system":"sec-edgar","filing":"0001214659-24-011783","document":"marketforms-66459.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465924011783/marketforms-66459.xml","form_type":"4"}},{"id":1462456,"issuer":{"id":877,"kind":"organization","name":"MONOLITHIC POWER SYSTEMS, INC.","symbol":"MPWR"},"owners":[{"id":878,"kind":"person","name":"Tseng Saria","position":1,"cik":"0001312593","reported_name":"Tseng Saria","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & General Counsel"}}],"security":"Common 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reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan."}],"balance_after":204339,"source":{"system":"sec-edgar","filing":"0001214659-24-002237","document":"marketforms-64625.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1280452/000121465924002237/marketforms-64625.xml","form_type":"4"}}],"next_cursor":"2024-02-09T19:35:33.000000Z,1651413"}