Ambiq Micro (AMBQ) CFO exercises 5,952 options, holds 106K shares

Rhea-AI Filing Summary

Ambiq Micro, Inc. Chief Financial Officer Jeffrey G. Winzeler exercised stock options to acquire 5,952 shares of common stock at $16.80 per share on June 2, 2026. After the transaction, he directly owned 106,299 common shares and retained a substantial remaining stock option position.

The exercised options were part of a larger grant where 47,619 shares vested on October 1, 2025, with an additional portion vesting on June 2, 2026 and the rest vesting in equal monthly installments, subject to his continued service. The exercised option grant is scheduled to expire on June 9, 2035.

Insider Trade Summary

5,952 shares exercised/converted

Mixed 2 txns

Insider Winzeler Jeffrey G

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	5,952	$0.00	--
Exercise	Common Stock	5,952	$16.80	$100K

Holdings After Transaction: Stock Option (Right to Buy) — 104,953 shares (Direct, null); Common Stock — 106,299 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Options exercised: 5,952 shares Exercise price: $16.80 per share Shares held after exercise: 106,299 shares +4 more

7 metrics

Options exercised 5,952 shares Common stock acquired via option exercise on June 2, 2026

Exercise price $16.80 per share Strike price for exercised stock options

Shares held after exercise 106,299 shares CFO’s direct common stock holdings post-transaction

Remaining options 104,953 options Stock options remaining after the 5,952-share exercise

Initial vested tranche 47,619 shares Portion of option that vested on October 1, 2025

Remaining grant pre-2026 vest 95,238 shares Balance of shares under option before June 2, 2026 vesting

Option expiration June 9, 2035 Expiration date of the stock option grant

Key Terms

Stock Option (Right to Buy), Exercise or conversion of derivative security, vesting, monthly installments, +1 more

5 terms

Stock Option (Right to Buy) financial

"security_title: "Stock Option (Right to Buy)""

Exercise or conversion of derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

vesting financial

"shares subject to the option vested on October 1, 2025"

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.

monthly installments financial

"1/36 of the remaining shares subject to the option vest in equal monthly installments thereafter"

Monthly installments are regular, fixed payments made each month to gradually pay off a larger amount, such as a loan or purchase. Think of it like paying for a big item in small, manageable parts instead of all at once. For investors, understanding installment payments helps gauge how debts are structured and how they might affect financial stability or cash flow over time.

expiration date financial

"expiration_date: "2035-06-09T00:00:00.000Z""

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

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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^*

Winzeler Jeffrey G

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/02/2026

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	06/02/2026		M		5,952	A	$16.8	106,299	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)	$16.8	06/02/2026		M			5,952	(1)	06/09/2035	Common Stock	5,952	$0	104,953	D

Explanation of Responses:

1. 47,619 shares subject to the option vested on October 1, 2025, 1/4 of the remaining 95,238 shares subject to the option vested on June 2, 2026, and 1/36 of the remaining shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service.

	/s/ Jeffrey Winzeler	06/04/2026
	** 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 its CFO?

Ambiq Micro reported that CFO Jeffrey G. Winzeler exercised stock options to acquire 5,952 shares of common stock. This was an option exercise, not an open-market purchase or sale, and it increased his directly held share count.

How many Ambiq Micro (AMBQ) shares does the CFO hold after this Form 4?

Following the reported option exercise, CFO Jeffrey G. Winzeler directly holds 106,299 shares of Ambiq Micro common stock. This reflects his equity position immediately after acquiring 5,952 shares through the option exercise on June 2, 2026.

At what price did the Ambiq Micro (AMBQ) CFO exercise his stock options?

The CFO exercised stock options to buy 5,952 Ambiq Micro common shares at an exercise price of $16.80 per share. This price reflects the strike price of the option grant, not the market price on the transaction date.

What is the size of the remaining stock option position for the Ambiq Micro (AMBQ) CFO?

After exercising 5,952 options, the Form 4 shows 104,953 stock options remaining for the CFO. These options relate to an original grant with staged vesting and have an expiration date of June 9, 2035, if service conditions are met.

How do the Ambiq Micro (AMBQ) CFO’s stock options vest over time?

According to the footnote, 47,619 shares under the option vested on October 1, 2025. One-quarter of the remaining 95,238 shares vested on June 2, 2026, and 1/36 of the rest vest in equal monthly installments, contingent on continued service.