Transaction · 0002078454-26-000012

Esaka Fumihide

Esaka Fumihide, CEO, reported an open-market or private sale at Ambiq Micro, Inc. involving 2100.000000 shares for an estimated $122889.06. Reported holdings after the transaction were 451189.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCEO
AMBQAmbiq Micro, Inc.
Trade date
Aug 31, 2026
Filing date
Sep 02, 2026
View on SEC Insider profile
Estimated value-$122kShares × reported price
Shares traded2.10k$58.52 per share
Holdings after451kDirect
% of reported position traded0.46%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 453,289 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.

AMBQ price since this filing

Daily closing prices, with the filing date and available return windows
AMBQ · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +11.0%1w ago -1.0%1d ago +0.1%
Returns since7d +11.3%30d +19.0%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0002078454-26-000012
Common Stock
Transaction date
Aug 31, 2026
Filed Sep 02, 2026, 08:47 PM · 2d delay
Shares
2,100 sh
$58.52 per share
Estimated value
-$122k
Computed from shares × price
Holdings after
451,189 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Repeat Seller 10b5-1 Detected
Filing-only score

0 points

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.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 2

    Filing reported within two business days of the transaction.
  • tenb5_1_detected-10 points

    is_10b5_1 = true

    Stored filing content includes detected 10b5-1 language.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

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 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 $56.35 to $57.34 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 $57.37 to $58.24 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 $58.42 to $58.74 per share. The Reporting Person undertakes to p…

  5. F5

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.29 to $57.28 per share. The Reporting Person undertakes to p…

  6. F6

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.29 to $58.28 per share. The Reporting Person undertakes to p…

  7. F7

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $58.29 to $58.49 per share. The Reporting Person undertakes to p…

  8. F8

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.00 to $56.83 per share. The Reporting Person undertakes to p…

  9. F9

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $55.45 to $56.44 per share. The Reporting Person undertakes to p…

  10. F10

    The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $56.46 to $57.06 per share. The Reporting Person undertakes to p…

  11. F11

    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…

  12. F12

    1/48 of the shares subject to the option vested on June 26, 2021, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's contin…

  13. F13

    1/4 of the shares subject to the option vested on January 1, 2024, and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continu…

Original filing · 0002078454-26-000012
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