Transaction · 0001214659-26-010630

DEAN ROBERT W II

DEAN ROBERT W II, IC, reported an open-market or private sale at MONOLITHIC POWER SYSTEMS, INC. involving 6.000000 shares for an estimated $8481.84. Reported holdings after the transaction were 7126.000000 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 20
Trade dateAug 17, 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
$1,310.59
Pre-filing
1mo ago +0.1%1w ago +5.4%1d ago +7.0%
Returns since
7d +0.0%30d -6.5%90d -6.5%180d -6.5%1y -6.5%

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 2026-08-20Filed 14 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
0001214659-26-010630
Common Stock
Transaction date
Aug 17, 2026
Filed Aug 20, 2026, 12:44 AM · 3d delay
Shares
6 sh
$141k per share
Estimated value
-$848k
Computed from shares × price
Holdings after
7.12k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
+6score
Filing-only score

+6

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.

Original filing · 0001214659-26-010630
Related transactions

0 other filings

Same reporting owner
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MPWR