Notice of Proposed Sale · 144

Ambiq Micro, Inc.

AMBQNYSEEQUITYCurrent

Notice of Proposed Sale

Filed Oct 2, 2026Accepted Oct 2, 2026, 4:07 PM EDTFiling CIK 2078454Accession 0002078454-26-000016

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: AMBIQ MICRO, INC.
Issuer CIK: 0001500412
SEC file number: 001-42766
Phone: (512) 879-2850
Person for whose account securities are to be sold: Fumihide Esaka
Relationships to issuer: Officer · Director
Street: 6500 RIVER PLACE BLVD.
Street (continued): BUILDING 7 SUITE 200
City: AUSTIN
State / country code: TX
Postal code: 78730

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common Stock	16,560	1,145,124.00	24,516,643	10/02/2026	NYSE	Morgan Stanley Smith Barney LLC

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC
Street: Executive Financial Services
Street (continued): 1 New York Plaza, 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common Stock	10/02/2025	Restricted Stock Units	Issuer	16,560	N	10/02/2025	Services Rendered

Sales reported in the preceding three months

Sales reported in the preceding three months · 7 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
Fumihide Esaka	Common Stock	09/15/2026	13,500	813,715.23
Fumihide Esaka	Common Stock	09/11/2026	50,000	3,167,922.97
Fumihide Esaka	Common Stock	09/02/2026	11,027	625,108.5
Fumihide Esaka	Common Stock	09/01/2026	48,973	2,761,533.6
Fumihide Esaka	Common Stock	08/31/2026	35,000	2,009,854
Fumihide Esaka	Common Stock	08/31/2026	13,500	776,650.2
Fumihide Esaka	Common Stock	08/14/2026	13,500	869,225.85

Seller — prior-sale row 1, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Building 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 2, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Building 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 3, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Building 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 4, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Unit 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 5, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Unit 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 6, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Unit 7
City: Austin
State / country code: TX
Postal code: 78730

Seller — prior-sale row 7, entry 1

Name: Fumihide Esaka
Street: 6500 River Place Blvd.
Street (continued): Unit 7
City: Austin
State / country code: TX
Postal code: 78730

Prior-sale reporting

Nothing to report for the preceding three months: N

Remarks

This is a sell-to-cover transaction for taxes owed related to recent vesting and settlement of restricted stock units granted by the Issuer.

Notice signature

Notice date: 10/02/2026
Signed: /s/ Fumihide Esaka

Company context

We are a pioneer and leading provider of ultra-low power semiconductor solutions designed to address the significant power consumption challenges of general purpose and AI compute – especially at the edge.

Current securities

AMBQNYSE · EQUITY · Current

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