Ambiq director sells 185 shares after option exercise

Ambiq Micro, Inc. (AMBQ) director Ker Zhang exercised a stock option on September 4, 2026, converting rights for 1,785 shares of common stock at an exercise price of $5.88 per share.

Rhea-AI Filing Summary

Ambiq Micro, Inc. (AMBQ) director Ker Zhang exercised a stock option on September 4, 2026, converting rights for 1,785 shares of common stock at an exercise price of $5.88 per share. On the same date, Zhang sold 185 shares of common stock at $56.92 per share. The option covered by this transaction was fully exercised and reported as having no remaining balance, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider ZHANG KER

Role Director

Sold 185 shs ($11K)

Approx. gross sale proceeds $11K

Approx. exercise cost $10K

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) F1	1,785	$0.00	$0.00
Exercise	Common Stock	1,785	$5.88	$10K
Sale	Common Stock	185	$56.92	$11K

Holdings After Transaction: Stock Option (Right to Buy) — 0 contracts (Direct); Common Stock — 30,366 shares (Direct)

Footnotes (1)

1. F1. 1/4 of the shares subject to the option vested on September 8, 2017, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service.

Key Figures

Shares acquired through option exercise: 1,785 shares Option exercise price: $5.88 per share Shares sold: 185 shares +3 more

6 metrics

Shares acquired through option exercise 1,785 shares Common stock obtained by exercising a stock option on September 4, 2026

Option exercise price $5.88 per share Exercise price for the 1,785 shares of common stock

Shares sold 185 shares Common stock sold on September 4, 2026

Sale price $56.92 per share Price reported for the 185 shares of common stock sold

Option shares remaining 0 shares Reported remaining balance of the exercised stock option after September 4, 2026

Initial option grant size referenced in vesting terms 1,785 shares Shares subject to the option that vested over time, as described in the vesting footnote

Key Terms

Stock Option, Common Stock, vesting

3 terms

Stock Option financial

"1/4 of the shares subject to the option vested on September 8, 2017"

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

Common Stock financial

"1/4 of the shares subject to the option vested on September 8, 2017"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

vesting financial

"1/4 of the shares subject to the option vested on September 8, 2017"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did AMBQ director Ker Zhang report on September 4, 2026?

Ker Zhang reported exercising stock options for 1,785 shares of Ambiq Micro, Inc. common stock at $5.88 per share and selling 185 shares of common stock at $56.92 per share on September 4, 2026.

How many AMBQ shares did Ker Zhang acquire through option exercise?

Through the reported option exercise, Ker Zhang acquired 1,785 shares of Ambiq Micro, Inc. common stock at an exercise price of $5.88 per share.

How many AMBQ shares did Ker Zhang sell and at what price?

Ker Zhang sold 185 shares of Ambiq Micro, Inc. common stock on September 4, 2026 at a reported price of $56.92 per share.

What happened to Ker Zhang’s stock option position in AMBQ after the transaction?

The stock option covering 1,785 shares of Ambiq Micro, Inc. common stock was fully exercised, and the reported remaining balance of that option after the transaction is zero shares.

Was Ker Zhang’s AMBQ trading reported under a Rule 10b5-1 plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported for the transactions disclosed for Ambiq Micro, Inc. on September 4, 2026.

What are the vesting terms disclosed for Ker Zhang’s AMBQ stock option?

The company reports that one quarter of the shares under the option vested on September 8, 2017, and the remaining shares vested in equal monthly installments of one forty-eighth of the grant, subject to continued service.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/09/2026 - 05:08 PM EDT Accepted by SEC EDGAR 09/09/2026 - 05:08 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

ZHANG KER

(Last) (First) (Middle)

C/O AMBIQ MICRO, INC.

6500 RIVER PLACE BLVD., BLDG 7 SUITE 200

(Street)

AUSTIN TEXAS 78730

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ambiq Micro, Inc. [ AMBQ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/04/2026		M		1,785	A	$5.88	30,551	D
Common Stock	09/04/2026		S		185	D	$56.92	30,366	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$5.88	09/04/2026		M			1,785	(1)	09/07/2026	Common Stock	1,785	$0	0	D

Explanation of Responses:

1. 1/4 of the shares subject to the option vested on September 8, 2017, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service.

	/s/ Paula Floyd, Attorney-in-Fact	09/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)