Ambiq Micro (AMBQ) director awarded 4,957 RSUs in equity grant

Rhea-AI Filing Summary

TAUTGES JOSEPH A reported acquisition or exercise transactions in this Form 4 filing.

Ambiq Micro, Inc. director Joseph A. Tautges received an equity award in the form of 4,957 restricted stock units, each representing one share of common stock. The RSUs vest in three equal annual installments tied to future anniversaries of the grant date or annual stockholder meetings, subject to his continuous service under the company’s 2025 Equity Incentive Plan. Following this grant, he directly holds 53,703 shares of Ambiq Micro common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider TAUTGES JOSEPH A

Role null

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

Holdings After Transaction: Common Stock — 53,703 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSU grant size: 4,957 units Post-grant holdings: 53,703 shares Grant date: 2026-06-08 +2 more

5 metrics

RSU grant size 4,957 units Restricted stock units representing common shares granted to director

Post-grant holdings 53,703 shares Total Ambiq Micro common shares held directly after transaction

Grant date 2026-06-08 Date of RSU award to director Joseph A. Tautges

Award price per share $0.0000 per share RSUs granted as compensation with no purchase price

Vesting schedule 3 equal annual installments RSUs vest over three years or corresponding annual stockholder meetings

Key Terms

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

4 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

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

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.

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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^*

TAUTGES JOSEPH A

(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	53,703	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 did Ambiq Micro (AMBQ) director Joseph Tautges receive in this Form 4 filing?

Ambiq Micro director Joseph A. Tautges received 4,957 restricted stock units as an equity award. Each RSU represents a contingent right to one share of Ambiq Micro common stock, granted as part of his director compensation package.

How do the 4,957 RSUs granted to Ambiq Micro (AMBQ) director vest?

The 4,957 RSUs vest in three equal annual installments following the grant date. Each installment vests on the earlier of the relevant anniversary of the grant or the corresponding annual stockholder meeting, subject to the director’s continuous service with Ambiq Micro.

What is Joseph Tautges’s total Ambiq Micro (AMBQ) shareholding after this RSU grant?

After the grant, Joseph A. Tautges directly holds 53,703 shares of Ambiq Micro common stock. This total includes the newly awarded restricted stock units, which will settle into shares as they vest over future years, assuming continued service.

Are the Ambiq Micro (AMBQ) RSUs granted to the director an open-market purchase?

No, the RSUs are a grant, not an open-market purchase. They are part of equity compensation, carry a zero purchase price, and convert into shares over time if service conditions set out in Ambiq Micro’s 2025 Equity Incentive Plan are met.

What conditions affect vesting of Ambiq Micro (AMBQ) director RSUs?

Vesting is subject to Joseph Tautges’s “Continuous Service” under Ambiq Micro’s 2025 Equity Incentive Plan. RSUs vest on specified anniversaries or annual stockholder meetings, and unvested units may not settle into shares if service ends before scheduled vesting.