ESAKA FUMIHIDE (Chief Executive Officer) sold 19.1% of their position (108.50K shares) of AMBIQ MICRO, INC. on the open market

Open‑market sale worth $6.17M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 9 sales

ESAKA FUMIHIDE

Filed: 9/2/2026ACC: 0002078454-26-000012

InsiderESAKA FUMIHIDECIK 2078454

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IssuerAMBIQ MICRO, INC.CIK 1500412

DirectorOfficer· Chief Executive Officer

Since Mar 2026

-108.50K

Net shares

Net seller

$6.17M

Total sold

Open market trades

0B · 9S

Total transactions

117.77K acquired · 226.27K disposed

Non-Derivative Transactions13

Common Stock

Direct

M · Option Exercise

+13.50K

Price / share

$8.12

Trade value

$109.62K

% of position

3.0%

8/31/2026

451.19K→464.69K

Common Stock

Direct

S · Sale

−5.90K

Price / share

$56.87

Trade value

$335.45K

% of position

1.3%

8/31/2026

464.69K→458.79K

Common Stock

Direct

S · Sale

−5.50K

Price / share

$57.75

Trade value

$317.71K

% of position

1.2%

8/31/2026

458.79K→453.29K

Common Stock

Direct

S · Sale

−2.10K

Price / share

$58.52

Trade value

$122.89K

% of position

0.5%

8/31/2026

453.29K→451.19K

Common Stock

Direct

M · Option Exercise

+44.27K

Price / share

$12.60

Trade value

$557.81K

% of position

9.8%

8/31/2026

451.19K→495.46K

Common Stock

Direct

S · Sale

−15.60K

Price / share

$56.81

Trade value

$886.22K

% of position

3.1%

8/31/2026

495.46K→479.86K

Common Stock

Direct

S · Sale

−13.80K

Price / share

$57.70

Trade value

$796.28K

% of position

2.9%

8/31/2026

479.86K→466.06K

Common Stock

Direct

S · Sale

−5.60K

Price / share

$58.46

Trade value

$327.36K

% of position

1.2%

8/31/2026

466.06K→460.46K

Common Stock

Direct

M · Option Exercise

+48.97K

Price / share

$12.60

Trade value

$617.06K

% of position

10.6%

9/1/2026

460.46K→509.43K

Common Stock

Direct

S · Sale

−48.97K

Price / share

$56.39

Trade value

$2.76M

% of position

9.6%

9/1/2026

509.43K→460.46K

Common Stock

Direct

M · Option Exercise

+11.03K

Price / share

$12.60

Trade value

$138.94K

% of position

2.4%

9/2/2026

460.46K→471.49K

Common Stock

Direct

S · Sale

−1.45K

Price / share

$56.15

Trade value

$81.53K

% of position

0.3%

9/2/2026

471.49K→470.04K

Common Stock

Direct

S · Sale

−9.57K

Price / share

$56.77

Trade value

$543.57K

% of position

2.0%

9/2/2026

470.04K→460.46K

Total

Net shares

+9.27K

Net value

-$4.75M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	8/31/2026	M · Option Exercise	+13.50K	$8.12	$109.62K	3.0%	451.19K	464.69K
Common Stock Direct	8/31/2026	S · Sale	−5.90K	$56.87	$335.45K	1.3%	464.69K	458.79K
Common Stock Direct	8/31/2026	S · Sale	−5.50K	$57.75	$317.71K	1.2%	458.79K	453.29K
Common Stock Direct	8/31/2026	S · Sale	−2.10K	$58.52	$122.89K	0.5%	453.29K	451.19K
Common Stock Direct	8/31/2026	M · Option Exercise	+44.27K	$12.60	$557.81K	9.8%	451.19K	495.46K
Common Stock Direct	8/31/2026	S · Sale	−15.60K	$56.81	$886.22K	3.1%	495.46K	479.86K
Common Stock Direct	8/31/2026	S · Sale	−13.80K	$57.70	$796.28K	2.9%	479.86K	466.06K
Common Stock Direct	8/31/2026	S · Sale	−5.60K	$58.46	$327.36K	1.2%	466.06K	460.46K
Common Stock Direct	9/1/2026	M · Option Exercise	+48.97K	$12.60	$617.06K	10.6%	460.46K	509.43K
Common Stock Direct	9/1/2026	S · Sale	−48.97K	$56.39	$2.76M	9.6%	509.43K	460.46K
Common Stock Direct	9/2/2026	M · Option Exercise	+11.03K	$12.60	$138.94K	2.4%	460.46K	471.49K
Common Stock Direct	9/2/2026	S · Sale	−1.45K	$56.15	$81.53K	0.3%	471.49K	470.04K
Common Stock Direct	9/2/2026	S · Sale	−9.57K	$56.77	$543.57K	2.0%	470.04K	460.46K
Total			+9.27K		-$4.75M

Derivative Transactions5

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

13.50K shares

−13.50K

Strike price

8.12

Held after

72.01K

Exercisable

—

8/31/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

35K shares

−35K

Strike price

12.6

Held after

79.01K

Exercisable

—

8/31/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

9.27K shares

−9.27K

Strike price

12.6

Held after

175.27K

Exercisable

—

8/31/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

48.97K shares

−48.97K

Strike price

12.6

Held after

30.03K

Exercisable

—

9/1/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

11.03K shares

−11.03K

Strike price

12.6

Held after

19.01K

Exercisable

—

9/2/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Common Stock13.50K shares	8/31/2026	M · Option Exercise	−13.50K	8.12	—	72.01K
Stock Option (Right to Buy) Direct	Common Stock35K shares	8/31/2026	M · Option Exercise	−35K	12.6	—	79.01K
Stock Option (Right to Buy) Direct	Common Stock9.27K shares	8/31/2026	M · Option Exercise	−9.27K	12.6	—	175.27K
Stock Option (Right to Buy) Direct	Common Stock48.97K shares	9/1/2026	M · Option Exercise	−48.97K	12.6	—	30.03K
Stock Option (Right to Buy) Direct	Common Stock11.03K shares	9/2/2026	M · Option Exercise	−11.03K	12.6	—	19.01K