About this data
What it is
Before an executive, director or large owner sells restricted or control shares, they file a short notice with the SEC, called Form 144, saying how many shares they plan to sell, through which broker and roughly when. This feed lists those notices, and for each one shows whether a sale was reported afterwards on a Form 4 and how many days later.
Who files it
The person selling, or their broker, on the day the sale is placed. Electronic notices start in April 2023.
How current
We collect new notices throughout the day on SEC business days.
Terms
Form 144The notice an insider or other affiliate of a company files with the SEC before selling restricted or control shares, so the shares can be sold under Rule 144. The notice says how many shares, through which broker, and roughly when.10b5-1 planA Rule 10b5-1 trading plan lets an insider set up future sales in advance, on a schedule or at set prices, at a time when they do not hold inside information. A notice that gives a plan adoption date says the sale is made under such a plan.
Worth knowing
A notice is a plan, not a sale: the person may sell fewer shares, later, or not at all. The value is the one the filer typed, at a price they chose, not what the shares sell for. Many sales are routine, made to diversify or pay taxes, or under a 10b5-1 plan set up months earlier. A blank in the last column does not mean no sale: the person may not have to file a Form 4 (an ordinary affiliate does not), the sale may be recent, or the Form 4 may name a different spelling of the person. We match by the filer's number first and by name second. Information, not investment advice.

All of this comes from public filings.

Form 144 notices per day, last 30 days

0100200300Oct 17 · All notices: 0Oct 17 · Notices that give a 10b5-1 plan: 0Oct 17Oct 18 · All notices: 0Oct 18 · Notices that give a 10b5-1 plan: 0Oct 19 · All notices: 47Oct 19 · Notices that give a 10b5-1 plan: 29Oct 20 · All notices: 52Oct 20 · Notices that give a 10b5-1 plan: 39Oct 21 · All notices: 46Oct 21 · Notices that give a 10b5-1 plan: 26Oct 21Oct 22 · All notices: 49Oct 22 · Notices that give a 10b5-1 plan: 22Oct 23 · All notices: 62Oct 23 · Notices that give a 10b5-1 plan: 23Oct 24 · All notices: 0Oct 24 · Notices that give a 10b5-1 plan: 0Oct 25 · All notices: 0Oct 25 · Notices that give a 10b5-1 plan: 0Oct 25Oct 26 · All notices: 75Oct 26 · Notices that give a 10b5-1 plan: 28Oct 27 · All notices: 71Oct 27 · Notices that give a 10b5-1 plan: 18Oct 28 · All notices: 54Oct 28 · Notices that give a 10b5-1 plan: 17Oct 29 · All notices: 100Oct 29 · Notices that give a 10b5-1 plan: 31Oct 29Oct 30 · All notices: 97Oct 30 · Notices that give a 10b5-1 plan: 35Oct 31 · All notices: 0Oct 31 · Notices that give a 10b5-1 plan: 0Nov 1 · All notices: 0Nov 1 · Notices that give a 10b5-1 plan: 0Nov 2 · All notices: 272Nov 2 · Notices that give a 10b5-1 plan: 133Nov 2Nov 3 · All notices: 142Nov 3 · Notices that give a 10b5-1 plan: 48Nov 4 · All notices: 190Nov 4 · Notices that give a 10b5-1 plan: 77Nov 5 · All notices: 148Nov 5 · Notices that give a 10b5-1 plan: 53Nov 6 · All notices: 127Nov 6 · Notices that give a 10b5-1 plan: 41Nov 6Nov 7 · All notices: 0Nov 7 · Notices that give a 10b5-1 plan: 0Nov 8 · All notices: 0Nov 8 · Notices that give a 10b5-1 plan: 0Nov 9 · All notices: 217Nov 9 · Notices that give a 10b5-1 plan: 75Nov 10 · All notices: 202Nov 10 · Notices that give a 10b5-1 plan: 59Nov 10Nov 11 · All notices: 0Nov 11 · Notices that give a 10b5-1 plan: 0Nov 12 · All notices: 240Nov 12 · Notices that give a 10b5-1 plan: 77Nov 13 · All notices: 127Nov 13 · Notices that give a 10b5-1 plan: 28Nov 14 · All notices: 0Nov 14 · Notices that give a 10b5-1 plan: 0Nov 14Nov 15 · All notices: 0Nov 15 · Notices that give a 10b5-1 plan: 0
0100200300Oct 17 · All notices: 0Oct 17 · Notices that give a 10b5-1 plan: 0Oct 17Oct 18 · All notices: 0Oct 18 · Notices that give a 10b5-1 plan: 0Oct 19 · All notices: 47Oct 19 · Notices that give a 10b5-1 plan: 29Oct 20 · All notices: 52Oct 20 · Notices that give a 10b5-1 plan: 39Oct 21 · All notices: 46Oct 21 · Notices that give a 10b5-1 plan: 26Oct 21Oct 22 · All notices: 49Oct 22 · Notices that give a 10b5-1 plan: 22Oct 23 · All notices: 62Oct 23 · Notices that give a 10b5-1 plan: 23Oct 24 · All notices: 0Oct 24 · Notices that give a 10b5-1 plan: 0Oct 25 · All notices: 0Oct 25 · Notices that give a 10b5-1 plan: 0Oct 25Oct 26 · All notices: 75Oct 26 · Notices that give a 10b5-1 plan: 28Oct 27 · All notices: 71Oct 27 · Notices that give a 10b5-1 plan: 18Oct 28 · All notices: 54Oct 28 · Notices that give a 10b5-1 plan: 17Oct 29 · All notices: 100Oct 29 · Notices that give a 10b5-1 plan: 31Oct 29Oct 30 · All notices: 97Oct 30 · Notices that give a 10b5-1 plan: 35Oct 31 · All notices: 0Oct 31 · Notices that give a 10b5-1 plan: 0Nov 1 · All notices: 0Nov 1 · Notices that give a 10b5-1 plan: 0Nov 2 · All notices: 272Nov 2 · Notices that give a 10b5-1 plan: 133Nov 2Nov 3 · All notices: 142Nov 3 · Notices that give a 10b5-1 plan: 48Nov 4 · All notices: 190Nov 4 · Notices that give a 10b5-1 plan: 77Nov 5 · All notices: 148Nov 5 · Notices that give a 10b5-1 plan: 53Nov 6 · All notices: 127Nov 6 · Notices that give a 10b5-1 plan: 41Nov 6Nov 7 · All notices: 0Nov 7 · Notices that give a 10b5-1 plan: 0Nov 8 · All notices: 0Nov 8 · Notices that give a 10b5-1 plan: 0Nov 9 · All notices: 217Nov 9 · Notices that give a 10b5-1 plan: 75Nov 10 · All notices: 202Nov 10 · Notices that give a 10b5-1 plan: 59Nov 10Nov 11 · All notices: 0Nov 11 · Notices that give a 10b5-1 plan: 0Nov 12 · All notices: 240Nov 12 · Notices that give a 10b5-1 plan: 77Nov 13 · All notices: 127Nov 13 · Notices that give a 10b5-1 plan: 28Nov 14 · All notices: 0Nov 14 · Notices that give a 10b5-1 plan: 0Nov 14Nov 15 · All notices: 0Nov 15 · Notices that give a 10b5-1 plan: 0

All notices Notices that give a 10b5-1 plan

By the day each notice was filed. A notice is a plan to sell, not a sale.

Latest notices of planned insider sales

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Showing: ticker MPWR

Latest notices of planned insider sales
FiledInsiderCompanyShares to sellA notice is a plan, not a sale. The person may sell fewer shares, sell later, or not sell at all, and the number of shares is what they expect to sell on the day they file.ValueThe aggregate market value the filer typed on the notice: the shares times a price the filer chose. It is not what the shares will sell for.PlanA Rule 10b5-1 trading plan lets an insider set up future sales in advance, on a schedule or at set prices, at a time when they do not hold inside information. A notice that gives a plan adoption date says the sale is made under such a plan.Expected saleSale reportedInsiders who are officers, directors or hold more than 10% report their sales on a Form 4, within two business days. We look for the first Form 4 with an open-market sale by the same person in the same company within 90 days of the notice, and show how many days after the notice it was filed. A blank means we found none: the person may not have sold, may not have to file a Form 4, or the Form 4 may be one we do not have.Notice
Nov 13, 2026Eugen J. Elmiger
Director
MPWR
Monolithic Power Systems, Inc.
2,500$3.5M—Nov 13, 2026—Form 144 ↗
Sep 28, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
30,000$40.3M10b5-1Sep 28, 2026Form 4 ↗
2 days later · 30,000 shares
Form 144 ↗
Aug 24, 2026Robert W. Dean II
Officer
MPWR
Monolithic Power Systems, Inc.
32$41.5K—Aug 24, 2026Form 4 ↗
2 days later · 32 shares
Form 144 ↗
Aug 17, 2026Robert W. Dean II
Officer
MPWR
Monolithic Power Systems, Inc.
6$8,128—Aug 17, 2026Form 4 ↗
2 days later · 6 shares
Form 144 ↗
Aug 11, 2026Kuo Wei Chang
Director
MPWR
Monolithic Power Systems, Inc.
100$142.0K—Aug 11, 2026Form 4 ↗
2 days later · 50 shares
Form 144 ↗
Aug 5, 2026Robert Dean
Officer
MPWR
Monolithic Power Systems, Inc.
105$141.1K—Aug 5, 2026Form 4 ↗
1 day later · 105 shares
Form 144 ↗
Jul 15, 2026Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
15,000$20.2M10b5-1Jul 15, 2026Form 4 ↗
2 days later · 15,000 shares
Form 144 ↗
Jun 1, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,001$4.6M10b5-1Jun 1, 2026—Form 144 ↗
May 28, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
7,565$12.9M—May 27, 2026Form 4 ↗
1 day later · 7,565 shares
Form 144 ↗
May 26, 2026Jeff Zhou
Director
MPWR
Monolithic Power Systems, Inc.
486$816.5K—May 26, 2026Form 4 ↗
1 day later · 486 shares
Form 144 ↗
May 26, 2026Robert W. Dean II
Officer
MPWR
Monolithic Power Systems, Inc.
22$35.9K—May 26, 2026Form 4 ↗
2 days later · 22 shares
Form 144 ↗
May 22, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
5,000$7.9M—May 22, 2026Form 4 ↗
5 days later · 5,000 shares
Form 144 ↗
May 18, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
40,000$59.3M—May 18, 2026Form 4 ↗
2 days later · 40,000 shares
Form 144 ↗
May 18, 2026Robert W. Dean II
Officer
MPWR
Monolithic Power Systems, Inc.
4$6,253—May 18, 2026Form 4 ↗
2 days later · 4 shares
Form 144 ↗
May 15, 2026Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
12,000$18.7M10b5-1May 15, 2026Form 4 ↗
4 days later · 12,000 shares
Form 144 ↗
May 6, 2026Deming Xiao
Officer
MPWR
Monolithic Power Systems, Inc.
30,000$49.6M—May 6, 2026Form 4 ↗
2 days later · 30,000 shares
Form 144 ↗
May 6, 2026Jeff Zhou
Director
MPWR
Monolithic Power Systems, Inc.
500$825.0K—May 6, 2026Form 4 ↗
same day · 1,514 shares
Form 144 ↗
May 6, 2026Eileen Wynne
Director
MPWR
Monolithic Power Systems, Inc.
335$530.2K—May 6, 2026Form 4 ↗
2 days later · 335 shares
Form 144 ↗
May 6, 2026Eugen J. Elmiger
Director
MPWR
Monolithic Power Systems, Inc.
12,000$19.8M—May 7, 2026Form 4 ↗
2 days later · 12,000 shares
Form 144 ↗
May 5, 2026Rosalind Sciammas
Member of immediate family of any of th…
MPWR
Monolithic Power Systems, Inc.
400$600.0K—May 5, 2026Form 4 ↗
1 day later · 380 shares
Form 144 ↗
May 5, 2026Jeff Zhou
Director
MPWR
Monolithic Power Systems, Inc.
1,014$1.6M—May 5, 2026Form 4 ↗
1 day later · 1,514 shares
Form 144 ↗
May 1, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$4.6M10b5-1May 1, 2026—Form 144 ↗
Apr 8, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
8,964$11.7M10b5-1Apr 8, 2026Form 4 ↗
2 days later · 8,963 shares
Form 144 ↗
Apr 6, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
7,636$8.9M10b5-1Apr 6, 2026Form 4 ↗
2 days later · 7,636 shares
Form 144 ↗
Apr 1, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
1,400$1.6M10b5-1Apr 1, 2026Form 4 ↗
2 days later · 1,400 shares
Form 144 ↗
Apr 1, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$3.3M10b5-1Apr 1, 2026—Form 144 ↗
Mar 30, 2026Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
25,674$25.9M10b5-1Mar 30, 2026Form 4 ↗
2 days later · 25,674 shares
Form 144 ↗
Mar 20, 2026Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
120$131.3K10b5-1Mar 20, 2026Form 4 ↗
4 days later · 30 shares
Form 144 ↗
Mar 2, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$3.3M10b5-1Mar 2, 2026—Form 144 ↗
Feb 12, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
33,000$38.7M10b5-1Feb 12, 2026Form 4 ↗
5 days later · 33,000 shares
Form 144 ↗
Feb 11, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
33,000$39.2M10b5-1Feb 11, 2026Form 4 ↗
2 days later · 33,000 shares
Form 144 ↗
Feb 10, 2026The Sciammas Trust DTD 06/08/2018
Member of immediate family of any of th…
MPWR
Monolithic Power Systems, Inc.
200$240.0K—Feb 10, 2026Form 4 ↗
2 days later · 200 shares
Form 144 ↗
Feb 10, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
34,000$38.8M10b5-1Feb 10, 2026Form 4 ↗
2 days later · 34,000 shares
Form 144 ↗
Feb 6, 2026Theodore Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
995$1.2M—Feb 6, 2026Form 4 ↗
4 days later · 21,725 shares
Form 144 ↗
Feb 6, 2026Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
1,286$1.5M—Feb 6, 2026Form 4 ↗
4 days later · 22,875 shares
Form 144 ↗
Feb 6, 2026Tseng Saria
Officer
MPWR
Monolithic Power Systems, Inc.
1,286$1.5M—Feb 6, 2026Form 4 ↗
4 days later · 22,875 shares
Form 144 ↗
Feb 6, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
3,082$3.6M—Feb 6, 2026Form 4 ↗
4 days later · 54,923 shares
Form 144 ↗
Feb 6, 2026Xiao Deming
Officer
MPWR
Monolithic Power Systems, Inc.
1,286$1.5M—Feb 6, 2026Form 4 ↗
4 days later · 22,875 shares
Form 144 ↗
Feb 4, 2026Theodore Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
20,730$24.1M—Feb 4, 2026Form 4 ↗
6 days later · 21,725 shares
Form 144 ↗
Feb 4, 2026Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
21,590$25.1M—Feb 4, 2026Form 4 ↗
6 days later · 22,875 shares
Form 144 ↗
Feb 4, 2026Tseng Saria
Officer
MPWR
Monolithic Power Systems, Inc.
21,590$25.1M—Feb 4, 2026Form 4 ↗
6 days later · 22,875 shares
Form 144 ↗
Feb 4, 2026Michael Hsing
Officer, Director
MPWR
Monolithic Power Systems, Inc.
51,841$60.4M—Feb 4, 2026Form 4 ↗
6 days later · 54,923 shares
Form 144 ↗
Feb 4, 2026Xiao Deming
Officer
MPWR
Monolithic Power Systems, Inc.
21,590$25.1M—Feb 4, 2026Form 4 ↗
6 days later · 22,875 shares
Form 144 ↗
Feb 2, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$3.4M10b5-1Feb 2, 2026Form 4 ↗
2 days later · 3,000 shares
Form 144 ↗
Jan 2, 2026Theodore Bernhard Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$2.8M10b5-1Jan 2, 2026Form 4 ↗
4 days later · 3,000 shares
Form 144 ↗
Dec 29, 2025Victor Lee
Director
MPWR
Monolithic Power Systems, Inc.
2,000$1.9M10b5-1Dec 24, 2025Form 4 ↗
8 days later · 600 shares
Form 144 ↗
Dec 1, 2025Bernie Blegen
Officer
MPWR
Monolithic Power Systems, Inc.
3,000$2.7M10b5-1Dec 1, 2025Form 4 ↗
1 day later · 3,000 shares
Form 144 ↗
Nov 26, 2025Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
20,000$18.5M—Nov 26, 2025Form 4 ↗
2 days later · 20,000 shares
Form 144 ↗
Nov 25, 2025Saria Tseng
Officer
MPWR
Monolithic Power Systems, Inc.
20,000$18.1M—Nov 25, 2025Form 4 ↗
3 days later · 20,000 shares
Form 144 ↗
Nov 24, 2025Maurice Sciammas
Officer
MPWR
Monolithic Power Systems, Inc.
3,976$3.6M—Nov 24, 2025Form 4 ↗
1 day later · 3,976 shares
Form 144 ↗

The newest 50 items, most recent first. Every row links to the notice on the SEC's site, and to the Form 4 when we found one. Updated Nov 15, 2026, 6:31 PM EST.

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