Transaction · 0001214659-26-010932

DEAN ROBERT W II

DEAN ROBERT W II, IC, reported an open-market or private sale at MONOLITHIC POWER SYSTEMS, INC. involving 32.000000 shares for an estimated $41527.04. Reported holdings after the transaction were 7094.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SIC
MPWRMONOLITHIC POWER SYSTEMS, INC.
Filing timeAug 26
Trade dateAug 24, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
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Pre-filing
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Returns since
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MPWR price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
MPWR since 2026-08-26Filed 9 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001214659-26-010932
Common Stock
Transaction date
Aug 24, 2026
Filed Aug 26, 2026, 11:22 PM · 2d delay
Shares
32 sh
$129k per share
Estimated value
-$4.15M
Computed from shares × price
Holdings after
7.09k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
+10score
Filing-only score

+10

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Interim CFO

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units.

  2. F2

    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 $1,296.07 to $1,298.01. The reporting perso…

  3. F3

    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…

Original filing · 0001214659-26-010932
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Same reporting owner
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MPWR