Transaction · 0002078454-26-000018

Esaka Fumihide

Esaka Fumihide, CEO, reported an open-market or private sale at Ambiq Micro, Inc. involving 862.000000 shares for an estimated $61942.63. Reported holdings after the transaction were 443900.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SCEO
AMBQAmbiq Micro, Inc.
Filing timeOct 06
Trade dateOct 02, 2026
Filing · SECView on SEC
InsiderProfile
% of reported position traded0.19%Shares sold ÷ (holdings after + shares sold). Estimated position before: 444,762 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$63.24
Pre-filing
1mo ago -9.4%1w ago +10.4%1d ago +9.3%
Returns since
7d30d90d180d1y

AMBQ price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
AMBQ since 2026-10-06Filed 2 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
0002078454-26-000018
Common Stock
Transaction date
Oct 02, 2026
Filed Oct 06, 2026, 10:53 PM · 4d delay
Shares
862 sh
$71.86 per share
Estimated value
-$61.9k
Computed from shares × price
Holdings after
443k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Repeat Seller
+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

Chief Executive Officer

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    This sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settleme…

  2. F2

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $68.41 to $69.40 per share. The Reporting Person undertakes to p…

  3. F3

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $69.41 to $70.16 per share. The Reporting Person undertakes to p…

  4. F4

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $71.50 to $72.26 per share. The Reporting Person undertakes to p…

Original filing · 0002078454-26-000018
Related transactions

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Same reporting owner
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