Transaction · 0002078454-26-000010

Esaka Fumihide

Esaka Fumihide, CEO, reported an open-market or private sale at Ambiq Micro, Inc. involving 1282.000000 shares for an estimated $81132.27. Reported holdings after the transaction were 463407.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCEO
AMBQAmbiq Micro, Inc.
Filing timeAug 18
Trade dateAug 14, 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
$63.01
Pre-filing
1mo ago +30.5%1w ago +7.1%1d ago +2.1%
Returns since
7d -5.4%30d -11.2%90d -11.2%180d -11.2%1y -11.2%

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 2026-08-18Filed 16 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
0002078454-26-000010
Common Stock
Transaction date
Aug 14, 2026
Filed Aug 18, 2026, 08:30 PM · 4d delay
Shares
1.28k sh
$6.32k per share
Estimated value
-$8.11M
Computed from shares × price
Holdings after
463k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership 10b5-1 Detected
-4score
Filing-only score

-4

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

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

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

    The transactions reported in this Form 4 occurred under a Rule 10b5-1 plan adopted by the Reporting Person on May 15, 2026.

  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 $62.66 to $63.64 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 $63.71 to $64.70 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 $64.92 to $65.56 per share. The Reporting Person undertakes to p…

  5. F5

    1/4 of the shares subject to the option vested on February 21, 2020, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's con…

Original filing · 0002078454-26-000010
Related transactions

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Same reporting owner
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AMBQ