Follow the people · Insider
Kuo Wei Herbert Chang
Kuo Wei Herbert Chang files insider transactions with the SEC as a director of Monolithic Power Systems (MPWR). We hold 2 disclosed purchases and sales filed since 23 January 2006, 2 of them in the last 90 days.
- Files forMPWR
- Disclosed buys and sells2 in all, 2 in the last 90 days
- Last disclosure25 August 2026
Positions held
2 posts we hold — a term names its own dates; a run of filings only says when they filed- Filed 21 June 2006 — 24 August 2026Director · Monolithic Power Systems (MPWR)208 Form 4 lines · source: SEC Form 4
- Filed 19 January 2006 — 29 March 2011Director · Marvell Technology Group (MRVL)32 Form 4 lines · source: SEC Form 4
Everything they disclosed
120 entries, newest first — one per disclosure report, one per Form 4 line- ▼ sold on the open market 50 shares of Monolithic Power SystemsSEC Form 425 August 2026Common Stock · traded 24 August 2026 · filed 25 August 2026
- ▼ sold on the open market 50 shares of Monolithic Power SystemsSEC Form 413 August 2026Common Stock · traded 11 August 2026 · filed 13 August 2026
- was granted 189 shares of Monolithic Power SystemsSEC Form 45 February 2026Common Stock · traded 3 February 2026 · filed 5 February 2026
- was granted 189 shares of Monolithic Power SystemsSEC Form 45 February 2026Common Stock · traded 3 February 2026 · filed 5 February 2026
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 425 November 2025Common Stock · traded 25 November 2025 · filed 25 November 2025
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 424 November 2025Common Stock · traded 21 November 2025 · filed 24 November 2025
- ▼ sold on the open market 50 shares of Monolithic Power SystemsSEC Form 413 May 2025Common Stock · traded 13 May 2025 · filed 13 May 2025
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 412 May 2025Common Stock · traded 12 May 2025 · filed 12 May 2025
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 49 May 2025Common Stock · traded 8 May 2025 · filed 9 May 2025
- was granted 335 shares of Monolithic Power SystemsSEC Form 46 February 2025Common Stock · traded 4 February 2025 · filed 6 February 2025
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 415 August 2024Common Stock · traded 15 August 2024 · filed 15 August 2024
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 415 August 2024Common Stock · traded 15 August 2024 · filed 15 August 2024
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 422 May 2024Common Stock · traded 20 May 2024 · filed 22 May 2024
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 415 May 2024Common Stock · traded 15 May 2024 · filed 15 May 2024
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 415 May 2024Common Stock · traded 15 May 2024 · filed 15 May 2024
- ▼ sold on the open market 250 shares of Monolithic Power SystemsSEC Form 429 February 2024Common Stock · traded 29 February 2024 · filed 29 February 2024
- ▼ sold on the open market 250 shares of Monolithic Power SystemsSEC Form 423 February 2024Common Stock · traded 22 February 2024 · filed 23 February 2024
- was granted 348 shares of Monolithic Power SystemsSEC Form 48 February 2024Common Stock · traded 6 February 2024 · filed 8 February 2024
- ▼ sold on the open market 400 shares of Monolithic Power SystemsSEC Form 415 November 2023Common Stock · traded 14 November 2023 · filed 15 November 2023
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 413 November 2023Common Stock · traded 13 November 2023 · filed 13 November 2023
- ▼ sold on the open market 500 shares of Monolithic Power SystemsSEC Form 429 August 2023Common Stock · traded 29 August 2023 · filed 29 August 2023
- was granted 470 shares of Monolithic Power SystemsSEC Form 48 February 2023Common Stock · traded 7 February 2023 · filed 8 February 2023
- was granted 542 shares of Monolithic Power SystemsSEC Form 49 February 2022Common Stock · traded 8 February 2022 · filed 9 February 2022
- ▼ sold on the open market 300 shares of Monolithic Power SystemsSEC Form 426 February 2021Common Stock · traded 26 February 2021 · filed 26 February 2021
- was granted 533 shares of Monolithic Power SystemsSEC Form 44 February 2021Common Stock · traded 2 February 2021 · filed 4 February 2021
- ▼ sold on the open market 3,000 shares of Monolithic Power SystemsSEC Form 45 November 2020Common Stock · traded 4 November 2020 · filed 5 November 2020
- ▼ sold on the open market 1,300 shares of Monolithic Power SystemsSEC Form 41 September 2020Common Stock · traded 28 August 2020 · filed 1 September 2020
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 414 August 2020Common Stock · traded 12 August 2020 · filed 14 August 2020
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 414 August 2020Common Stock · traded 12 August 2020 · filed 14 August 2020
- ▼ sold on the open market 600 shares of Monolithic Power SystemsSEC Form 410 August 2020Common Stock · traded 6 August 2020 · filed 10 August 2020
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 410 August 2020Common Stock · traded 7 August 2020 · filed 10 August 2020
- ▼ sold on the open market 476 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 3 August 2020 · filed 5 August 2020
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 4 August 2020 · filed 5 August 2020
- ▼ sold on the open market 100 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 4 August 2020 · filed 5 August 2020
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 5 August 2020 · filed 5 August 2020
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 5 August 2020 · filed 5 August 2020
- ▼ sold on the open market 200 shares of Monolithic Power SystemsSEC Form 45 August 2020Common Stock · traded 5 August 2020 · filed 5 August 2020
- ▼ sold on the open market 1,026 shares of Monolithic Power SystemsSEC Form 412 May 2020Common Stock · traded 8 May 2020 · filed 12 May 2020
- ▼ sold on the open market 2,000 shares of Monolithic Power SystemsSEC Form 412 May 2020Common Stock · traded 11 May 2020 · filed 12 May 2020
- ▼ sold on the open market 1,000 shares of Monolithic Power SystemsSEC Form 47 May 2020Common Stock · traded 5 May 2020 · filed 7 May 2020
- was granted 1,048 shares of Monolithic Power SystemsSEC Form 414 February 2020Common Stock · traded 12 February 2020 · filed 14 February 2020
- ▼ sold on the open market 1,000 shares of Monolithic Power SystemsSEC Form 414 February 2020Common Stock · traded 13 February 2020 · filed 14 February 2020
- ▼ sold on the open market 1,000 shares of Monolithic Power SystemsSEC Form 412 February 2020Common Stock · traded 11 February 2020 · filed 12 February 2020
- was granted 1,339 shares of Monolithic Power SystemsSEC Form 412 February 2019Common Stock · traded 11 February 2019 · filed 12 February 2019
- was granted 1,590 shares of Monolithic Power SystemsSEC Form 49 February 2018Common Stock · traded 7 February 2018 · filed 9 February 2018
- was granted 1,566 shares of Monolithic Power SystemsSEC Form 48 February 2017Common Stock · traded 7 February 2017 · filed 8 February 2017
- was granted 2,181 shares of Monolithic Power SystemsSEC Form 429 April 2016Common Stock · traded 28 April 2016 · filed 29 April 2016
- was granted 2,533 shares of Monolithic Power SystemsSEC Form 410 February 2015Common Stock · traded 9 February 2015 · filed 10 February 2015
- was granted 4,027 shares of Monolithic Power SystemsSEC Form 425 April 2014Common Stock · traded 11 February 2013 · filed 25 April 2014
- ▼ sold on the open market 2,892 shares of Monolithic Power SystemsSEC Form 425 April 2014Common Stock · traded 13 August 2013 · filed 25 April 2014
- ▼ sold on the open market 7,254 shares of Monolithic Power SystemsSEC Form 427 February 2014Common Stock · traded 26 February 2014 · filed 27 February 2014
- ▼ sold on the open market 5,000 shares of Monolithic Power SystemsSEC Form 425 February 2014Common Stock · traded 24 February 2014 · filed 25 February 2014
- was granted 3,493 shares of Monolithic Power SystemsSEC Form 413 February 2014Common Stock · traded 11 February 2014 · filed 13 February 2014
- ▼ sold on the open market 8,000 shares of Monolithic Power SystemsSEC Form 429 November 2013Common Stock · traded 27 November 2013 · filed 29 November 2013
- ▼ sold on the open market 2,643 shares of Monolithic Power SystemsSEC Form 429 November 2013Common Stock · traded 29 November 2013 · filed 29 November 2013
- ▼ sold on the open market 10,000 shares of Monolithic Power SystemsSEC Form 413 November 2013Common Stock · traded 11 November 2013 · filed 13 November 2013
- ▼ sold on the open market 10,000 shares of Monolithic Power SystemsSEC Form 413 November 2013Common Stock · traded 13 November 2013 · filed 13 November 2013
- ▼ sold on the open market 2,257 shares of Monolithic Power SystemsSEC Form 48 November 2013Common Stock · traded 6 November 2013 · filed 8 November 2013
- ▼ sold on the open market 1,743 shares of Monolithic Power SystemsSEC Form 48 November 2013Common Stock · traded 7 November 2013 · filed 8 November 2013
- ▼ sold on the open market 6,000 shares of Monolithic Power SystemsSEC Form 428 August 2013Common Stock · traded 28 August 2013 · filed 28 August 2013
- ▼ sold on the open market 4,000 shares of Monolithic Power SystemsSEC Form 426 August 2013Common Stock · traded 26 August 2013 · filed 26 August 2013
- ▼ sold on the open market 8,000 shares of Monolithic Power SystemsSEC Form 419 August 2013Common Stock · traded 15 August 2013 · filed 19 August 2013
- exercised options over 94 shares of Monolithic Power Systems (a derivative holding)SEC Form 414 August 2013Non-Qualified Stock Option (right to buy) · traded 12 August 2013 · filed 14 August 2013
- exercised options over 298 shares of Monolithic Power Systems (a derivative holding)SEC Form 414 August 2013Non-Qualified Stock Option (right to buy) · traded 12 August 2013 · filed 14 August 2013
- exercised options over 7,108 shares of Monolithic Power Systems (a derivative holding)SEC Form 414 August 2013Non-Qualified Stock Option (right to buy) · traded 13 August 2013 · filed 14 August 2013
- exercised options over 94 shares of Monolithic Power SystemsSEC Form 414 August 2013Common Stock · traded 12 August 2013 · filed 14 August 2013
- exercised options over 298 shares of Monolithic Power SystemsSEC Form 414 August 2013Common Stock · traded 12 August 2013 · filed 14 August 2013
- ▼ sold on the open market 392 shares of Monolithic Power SystemsSEC Form 414 August 2013Common Stock · traded 12 August 2013 · filed 14 August 2013
- exercised options over 7,108 shares of Monolithic Power SystemsSEC Form 414 August 2013Common Stock · traded 13 August 2013 · filed 14 August 2013
- ▼ sold on the open market 7,108 shares of Monolithic Power SystemsSEC Form 414 August 2013Common Stock · traded 13 August 2013 · filed 14 August 2013
- ▼ sold on the open market 5,000 shares of Monolithic Power SystemsSEC Form 431 May 2013Common Stock · traded 28 May 2013 · filed 31 May 2013
- ▼ sold on the open market 10,000 shares of Monolithic Power SystemsSEC Form 431 May 2013Common Stock · traded 30 May 2013 · filed 31 May 2013
- ▼ sold on the open market 12,500 shares of Monolithic Power SystemsSEC Form 431 May 2013Common Stock · traded 31 May 2013 · filed 31 May 2013
- exercised options over 2,000 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- ▼ sold on the open market 2,000 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- exercised options over 500 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- ▼ sold on the open market 500 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- exercised options over 5,000 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- ▼ sold on the open market 5,000 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 27 February 2013 · filed 1 March 2013
- exercised options over 2,799 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 28 February 2013 · filed 1 March 2013
- ▼ sold on the open market 2,799 shares of Monolithic Power SystemsSEC Form 41 March 2013Common Stock · traded 28 February 2013 · filed 1 March 2013
- exercised options over 2,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 27 February 2013 · filed 1 March 2013
- was granted 94 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 28 February 2013 · filed 1 March 2013
- exercised options over 500 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 27 February 2013 · filed 1 March 2013
- exercised options over 5,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 27 February 2013 · filed 1 March 2013
- exercised options over 2,799 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 28 February 2013 · filed 1 March 2013
- was granted 705 shares of Monolithic Power Systems (a derivative holding)SEC Form 41 March 2013Non-Qualified Stock Option (right to buy) · traded 28 February 2013 · filed 1 March 2013
- was granted 227 shares of Monolithic Power SystemsSEC Form 413 February 2013Common Stock · traded 7 February 2013 · filed 13 February 2013
- was granted 4,027 shares of Monolithic Power SystemsSEC Form 413 February 2013Common Stock · traded 11 February 2013 · filed 13 February 2013
- was granted 227 shares of Monolithic Power SystemsSEC Form 411 February 2013Common Stock · traded 7 February 2013 · filed 11 February 2013
- exercised options over 2,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 430 August 2012Non-Qualified Stock Option (right to buy) · traded 29 August 2012 · filed 30 August 2012
- exercised options over 2,000 shares of Monolithic Power SystemsSEC Form 430 August 2012Common Stock · traded 29 August 2012 · filed 30 August 2012
- ▼ sold on the open market 2,000 shares of Monolithic Power SystemsSEC Form 430 August 2012Common Stock · traded 29 August 2012 · filed 30 August 2012
- exercised options over 9,500 shares of Monolithic Power Systems (a derivative holding)SEC Form 429 August 2012Non-Qualified Stock Option (right to buy) · traded 27 August 2012 · filed 29 August 2012
- exercised options over 9,500 shares of Monolithic Power SystemsSEC Form 429 August 2012Common Stock · traded 27 August 2012 · filed 29 August 2012
- ▼ sold on the open market 9,500 shares of Monolithic Power SystemsSEC Form 429 August 2012Common Stock · traded 27 August 2012 · filed 29 August 2012
- exercised options over 3,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 424 August 2012Non-Qualified Stock Option (right to buy) · traded 23 August 2012 · filed 24 August 2012
- exercised options over 8,500 shares of Monolithic Power Systems (a derivative holding)SEC Form 424 August 2012Non-Qualified Stock Option (right to buy) · traded 24 August 2012 · filed 24 August 2012
- exercised options over 3,000 shares of Monolithic Power SystemsSEC Form 424 August 2012Common Stock · traded 23 August 2012 · filed 24 August 2012
- ▼ sold on the open market 3,000 shares of Monolithic Power SystemsSEC Form 424 August 2012Common Stock · traded 23 August 2012 · filed 24 August 2012
- exercised options over 8,500 shares of Monolithic Power SystemsSEC Form 424 August 2012Common Stock · traded 24 August 2012 · filed 24 August 2012
- ▼ sold on the open market 8,500 shares of Monolithic Power SystemsSEC Form 424 August 2012Common Stock · traded 24 August 2012 · filed 24 August 2012
- exercised options over 11,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 423 August 2012Non-Qualified Stock Option (right to buy) · traded 21 August 2012 · filed 23 August 2012
- exercised options over 4,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 423 August 2012Non-Qualified Stock Option (right to buy) · traded 22 August 2012 · filed 23 August 2012
- exercised options over 11,000 shares of Monolithic Power SystemsSEC Form 423 August 2012Common Stock · traded 21 August 2012 · filed 23 August 2012
- ▼ sold on the open market 11,000 shares of Monolithic Power SystemsSEC Form 423 August 2012Common Stock · traded 21 August 2012 · filed 23 August 2012
- exercised options over 4,000 shares of Monolithic Power SystemsSEC Form 423 August 2012Common Stock · traded 22 August 2012 · filed 23 August 2012
- ▼ sold on the open market 4,000 shares of Monolithic Power SystemsSEC Form 423 August 2012Common Stock · traded 22 August 2012 · filed 23 August 2012
- exercised options over 15,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 417 August 2012Non-Qualified Stock Option (right to buy) · traded 16 August 2012 · filed 17 August 2012
- exercised options over 3,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 417 August 2012Non-Qualified Stock Option (right to buy) · traded 16 August 2012 · filed 17 August 2012
- exercised options over 3,000 shares of Monolithic Power SystemsSEC Form 417 August 2012Common Stock · traded 16 August 2012 · filed 17 August 2012
- exercised options over 15,000 shares of Monolithic Power SystemsSEC Form 417 August 2012Common Stock · traded 16 August 2012 · filed 17 August 2012
- ▼ sold on the open market 18,000 shares of Monolithic Power SystemsSEC Form 417 August 2012Common Stock · traded 16 August 2012 · filed 17 August 2012
- exercised options over 2,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 415 August 2012Non-Qualified Stock Option (right to buy) · traded 14 August 2012 · filed 15 August 2012
- exercised options over 2,000 shares of Monolithic Power SystemsSEC Form 415 August 2012Common Stock · traded 14 August 2012 · filed 15 August 2012
- ▼ sold on the open market 2,000 shares of Monolithic Power SystemsSEC Form 415 August 2012Common Stock · traded 14 August 2012 · filed 15 August 2012
- exercised options over 12,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 410 August 2012Non-Qualified Stock Option (right to buy) · traded 9 August 2012 · filed 10 August 2012
- exercised options over 8,000 shares of Monolithic Power Systems (a derivative holding)SEC Form 410 August 2012Non-Qualified Stock Option (right to buy) · traded 10 August 2012 · filed 10 August 2012
- exercised options over 12,000 shares of Monolithic Power SystemsSEC Form 410 August 2012Common Stock · traded 9 August 2012 · filed 10 August 2012
- ▼ sold on the open market 12,000 shares of Monolithic Power SystemsSEC Form 410 August 2012Common Stock · traded 9 August 2012 · filed 10 August 2012
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.