Director Ker Zhang awarded 4,957 RSUs at Ambiq Micro (AMBQ)

Rhea-AI Filing Summary

ZHANG KER reported acquisition or exercise transactions in this Form 4 filing.

Ambiq Micro, Inc. director Ker Zhang received a grant of 4,957 restricted stock units, representing a right to receive the same number of common shares at no cost. These RSUs vest in three equal annual installments tied to future anniversaries or annual stockholder meetings, subject to his continued board service under the company’s 2025 Equity Incentive Plan. Following this equity award, Zhang holds 28,766 shares of common stock directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ZHANG KER

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,957	$0.00	--

Holdings After Transaction: Common Stock — 28,766 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 4,957 units Grant price: $0.00 per share Shares after transaction: 28,766 shares +1 more

4 metrics

RSUs granted 4,957 units Restricted stock unit award to director Ker Zhang

Grant price $0.00 per share Compensation-related equity award, not a market purchase

Shares after transaction 28,766 shares Total common stock held directly after RSU grant

Vesting schedule Three equal annual installments Based on anniversaries or annual stockholder meetings

Key Terms

restricted stock units ("RSUs"), Continuous Service, 2025 Equity Incentive Plan

3 terms

restricted stock units ("RSUs") financial

"Represents the grant of restricted stock units ("RSUs"), each of which represents a contingent right to receive one share"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Continuous Service financial

"subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2025 Equity Incentive Plan)"

2025 Equity Incentive Plan financial

"as defined in the Issuer's 2025 Equity Incentive Plan"

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Form 4 Insider Transactions: What Each Field Means →

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)
06/08/2026

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	06/08/2026		A		4,957(1)	A	$0	28,766	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

Explanation of Responses:

1. Represents the grant of restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of the Issuer's common stock. The RSUs will vest in three equal annual installments following the date of grant, with each annual RSU vesting to occur on the earlier of: (i) the first, second, or third anniversary of the grant date, as applicable, or (ii) the date of the Company's first, second, or third annual stockholder meeting following the grant date, as applicable (or the date immediately prior to the applicable annual stockholder meeting if the Reporting Person's service as a director ends at such meeting due to the director's failure to be re-elected or the director not standing for re-election), subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2025 Equity Incentive Plan).

	/s/ Jeffrey Winzeler, Attorney-in-Fact	06/10/2026
	** 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)

FAQ

What insider transaction did Ambiq Micro (AMBQ) report for Ker Zhang?

Ambiq Micro reported that director Ker Zhang received 4,957 restricted stock units as an equity award. Each RSU represents a contingent right to one share of common stock, vesting over time based on continued board service.

How many Ambiq Micro (AMBQ) shares does Ker Zhang hold after this grant?

After the RSU grant, Ker Zhang is reported to hold 28,766 shares of Ambiq Micro common stock directly. This reflects his position following the 4,957-share restricted stock unit award described in the Form 4 filing.

How do Ker Zhang’s Ambiq Micro (AMBQ) RSUs vest over time?

The 4,957 RSUs granted to Ker Zhang vest in three equal annual installments after the grant date. Each installment generally vests on specified anniversaries or corresponding annual stockholder meetings, contingent on his continued service as defined in the 2025 Equity Incentive Plan.

Does Ker Zhang pay for the Ambiq Micro (AMBQ) RSU grant?

No, the Form 4 shows the 4,957-share grant at a price of $0.00 per share, indicating a compensation-related equity award. RSUs give the right to receive shares in the future without a purchase price when vesting conditions are satisfied.

What plan governs Ker Zhang’s Ambiq Micro (AMBQ) RSU award?

Ker Zhang’s RSU award is subject to Ambiq Micro’s 2025 Equity Incentive Plan. The plan defines key terms like continuous service and vesting mechanics, including the annual installment schedule and conditions tied to director service and stockholder meetings.