Transaction · 0002078454-26-000002

Esaka Fumihide

Esaka Fumihide, CEO, reported a transaction classified as exercise at Ambiq Micro, Inc. involving 53660.000000 shares for an estimated $315520.80. Reported holdings after the transaction were 230573.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

exerciseSEC transaction code MCEO
AMBQAmbiq Micro, Inc.
Filing timeFeb 11
Trade dateOct 07, 2025
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
$29.32
Pre-filing
1mo ago +17.5%1w ago +2.0%1d ago +6.5%
Returns since
7d +1.1%30d -13.5%90d +126.4%180d +118.0%1y +104.9%

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 2026-02-11Filed 205 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
exercise
Code M
Identifier
0002078454-26-000002
Common Stock
Transaction date
Oct 07, 2025
Filed Feb 11, 2026, 01:08 AM · 127d delay
Shares
53.6k sh
$588 per share
Estimated value
$31.5M
Computed from shares × price
Holdings after
230k sh
Direct

Filing warnings

Notes recorded with this filing
1 warning
delayed filingThe filing was reported 127 calendar days after the transaction date.

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Delayed Filing Direct Ownership
0score
Filing-only score

0

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

    1/4 of the shares subject to the option vested on December 1, 2016, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's cont…

Original filing · 0002078454-26-000002
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