Director Timothy Chen granted 4,957 RSUs at Ambiq Micro (AMBQ)

Rhea-AI Filing Summary

Chen Timothy reported acquisition or exercise transactions in this Form 4 filing.

Ambiq Micro, Inc. director Timothy Chen reported a grant of 4,957 restricted stock units, each representing one share of common stock. These RSUs vest in three equal annual installments based on either grant anniversaries or upcoming annual stockholder meetings, subject to his continuous service, bringing his direct holdings to 52,575 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Chen Timothy

Role null

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

Holdings After Transaction: Common Stock — 52,575 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 4,957 units Price per share: $0.00 per share Shares owned after transaction: 52,575 shares +1 more

4 metrics

RSUs granted 4,957 units Restricted stock unit award to director on 2026-06-08

Price per share $0.00 per share Reported grant price for RSUs

Shares owned after transaction 52,575 shares Total direct common stock holdings after RSU grant

Vesting schedule Three equal annual installments Annual vesting tied to anniversaries or stockholder meetings

Key Terms

restricted stock units, RSUs, annual stockholder meeting, Continuous Service, +1 more

5 terms

restricted stock units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

RSUs financial

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

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

annual stockholder meeting financial

"the date of the Company's first, second, or third annual stockholder meeting following the grant date"

An annual stockholder meeting is a yearly gathering where a company's owners (shareholders) receive updates on performance, vote on key issues like board members, executive pay and major corporate plans, and ask questions of management. Think of it as a company town hall where choices about oversight and direction are decided; outcomes can affect management accountability, corporate strategy and ultimately the value and risks of investors’ shares.

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^*

Chen Timothy

(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	52,575	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) director Timothy Chen report?

Timothy Chen reported receiving 4,957 restricted stock units in Ambiq Micro. Each RSU represents one share of common stock, awarded at no cash cost, and is part of his equity-based director compensation under the company’s 2025 Equity Incentive Plan.

How do Timothy Chen’s new Ambiq Micro (AMBQ) RSUs vest?

The 4,957 RSUs granted to Timothy Chen vest in three equal annual installments. Vesting occurs on either each anniversary of the grant date or the corresponding annual stockholder meetings, whichever comes first, contingent on his continued service with Ambiq Micro.

How many Ambiq Micro (AMBQ) shares does Timothy Chen hold after this grant?

Following the RSU grant, Timothy Chen holds 52,575 shares of Ambiq Micro common stock directly. This figure includes the impact of the 4,957 RSUs reported in the filing, reflecting his total direct ownership position after the transaction.

What type of award did Ambiq Micro (AMBQ) grant to Timothy Chen?

Ambiq Micro granted Timothy Chen restricted stock units, or RSUs, rather than cash or stock purchased on the market. Each RSU is a contingent right to receive one common share, aligning his compensation with long-term shareholder interests through equity.

What conditions affect vesting of Timothy Chen’s Ambiq Micro (AMBQ) RSUs?

Vesting of Timothy Chen’s RSUs depends on continued service as defined in Ambiq Micro’s 2025 Equity Incentive Plan. If his board service ends, including at an annual meeting where he is not re-elected or does not stand for re-election, vesting could stop before all installments vest.