Ambiq Micro (AMBQ) CTO receives 80,308-share RSU equity award

Rhea-AI Filing Summary

Hanson Scott McLean reported acquisition or exercise transactions in this Form 4 filing.

Ambiq Micro Chief Technology Officer Hanson Scott McLean received a grant of 80,308 shares of common stock in the form of restricted stock units (RSUs). The award was recorded at a price of $0.00 per share as equity compensation, not a market purchase. Following this grant, he directly holds 203,126 shares of Ambiq Micro common stock. According to the award terms, 25% of the RSUs will vest on October 1, 2027, and the remaining shares will vest in equal quarterly installments over three years, contingent on his continued service under the company’s 2025 Equity Incentive Plan.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Hanson Scott McLean

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	80,308	$0.00	--

Holdings After Transaction: Common Stock — 203,126 shares (Direct)

Footnotes (1)

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Key Figures

RSU grant size: 80,308 shares Transaction price: $0.00 per share Holdings after grant: 203,126 shares +2 more

5 metrics

RSU grant size 80,308 shares Restricted stock units granted on March 6, 2026

Transaction price $0.00 per share Equity compensation, not cash purchase

Holdings after grant 203,126 shares Total common stock directly owned after transaction

Initial vesting tranche 25% of RSUs Vests on October 1, 2027

Ongoing vesting schedule 1/12 quarterly Remaining RSUs vest quarterly after October 1, 2027

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 RSU represents a contingent right to receive one share"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

Continuous Service financial

"will vest quarterly thereafter, subject to the Reporting Person's Continuous Service"

2025 Equity Incentive Plan financial

"Continuous Service (as defined in the Issuer's 2025 Equity Incentive Plan)."

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^*

Hanson Scott McLean

(Last) (First) (Middle)

C/O AMBIQ MICRO, INC.

6500 RIVER PLACE BLVD BUILDING 7 STE 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
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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)
03/10/2026

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	03/06/2026		A		80,308(1)	A	$0	203,126	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 RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. 25% of the shares subject to the RSU will vest on October 1, 2027, and 1/12 of the shares subject to the RSU will vest quarterly thereafter, subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2025 Equity Incentive Plan).

Remarks:

This Form 4 is being amended solely to correct an inadvertent administrative error affecting the vesting commencement date of the RSUs reported herein.

	/s/ Jeffrey Winzeler, Attorney-in-Fact	04/02/2026
	** 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 Hanson Scott McLean?

Ambiq Micro reported that Chief Technology Officer Hanson Scott McLean received a grant of 80,308 restricted stock units. These RSUs convert into common shares over time as they vest, serving as equity-based compensation rather than a cash purchase on the open market.

How many Ambiq Micro (AMBQ) shares does Hanson Scott McLean hold after this Form 4/A?

After the reported RSU grant, Hanson Scott McLean directly holds 203,126 shares of Ambiq Micro common stock. This total includes existing holdings plus the newly granted restricted stock units, which will settle into shares as vesting conditions are satisfied over time.

What are the vesting terms of Hanson Scott McLean’s RSU grant at Ambiq Micro (AMBQ)?

The RSU grant vests over several years. Twenty-five percent of the RSUs will vest on October 1, 2027. The remaining shares vest in quarterly installments of one-twelfth of the original grant, subject to his continued service under Ambiq Micro’s 2025 Equity Incentive Plan.

Was cash paid for the Ambiq Micro (AMBQ) RSU grant to Hanson Scott McLean?

No cash was paid for the RSU grant; the transaction price per share is listed as $0.00. The award represents equity compensation, giving the right to receive common shares upon vesting rather than a traditional open-market stock purchase.

What does the Form 4/A footnote say about the Ambiq Micro (AMBQ) RSUs?

The footnote states the transaction represents a grant of restricted stock units, each linked to one common share upon settlement. It also details that vesting depends on McLean’s Continuous Service as defined in Ambiq Micro’s 2025 Equity Incentive Plan.