Ambiq CTO exercises options, sells 7,000 shares

Ambiq Micro’s CTO and director exercised 7,000 options and sold 7,000 shares in pre-planned trades under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Ambiq Micro, Inc. insider Hanson Scott McLean, the Chief Technology Officer and a director, reported transactions involving company equity on September 15, 2026. He exercised 7,000 stock options to acquire an equal number of common shares at an exercise price of $8.12 per share, under an option scheduled to expire on October 1, 2028. Following this exercise, 45,279 options on Ambiq common stock remain held directly. On the same date, he sold a total of 7,000 common shares in several trades at weighted average prices around the $59–61 per share range, with pricing detail provided in the filing footnotes. All transactions occurred pursuant to a Rule 10b5-1 plan adopted on May 15, 2026.

Insider Trade Summary 10b5-1

Exercise and Sale: 7,000 shares ($365K approx. pre-tax spread)

Exercise and Sale 5 txns

Insider Hanson Scott McLean

Role Chief Technology Officer

Sold 7,000 shs ($422K)

Approx. gross sale proceeds $422K

Approx. exercise cost $57K

Approx. pre-tax spread $365K

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) F1, F4	7,000	$0.00	$0.00
Exercise	Common Stock F1	7,000	$8.12	$57K
Sale	Common Stock F1, F2	1,953	$59.5339	$116K
Sale	Common Stock F1, F3	4,947	$60.5564	$300K
Sale	Common Stock F1	100	$61.00	$6K

Holdings After Transaction: Stock Option (Right to Buy) — 45,279 contracts (Direct); Common Stock — 221,226 shares (Direct)

Footnotes (4)

1. F1. The transactions reported in this Form 4 occurred under a Rule 10b5-1 plan adopted by the Reporting Person on May 15, 2026.
2. F2. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $58.93 to $59.88 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. F3. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $59.97 to $60.82 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
4. F4. 1/4 of the shares subject to the option vested on August 16, 2019, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service.

Key Figures

Options exercised: 7,000 options Exercise price: $8.12 per share Options held after transaction: 45,279 options +4 more

7 metrics

Options exercised 7,000 options Stock options for Ambiq Micro, Inc. common stock exercised on September 15, 2026

Exercise price $8.12 per share Exercise price of the 7,000 stock options exercised on September 15, 2026

Options held after transaction 45,279 options Stock options on Ambiq common stock held directly after the reported exercise

Common shares sold (block 1) 1,953 shares at $59.5339 Weighted average sale price; trades ranged from $58.93 to $59.88 on September 15, 2026

Common shares sold (block 2) 4,947 shares at $60.5564 Weighted average sale price; trades ranged from $59.97 to $60.82 on September 15, 2026

Common shares sold (block 3) 100 shares at $61.00 Single reported sale of Ambiq common stock on September 15, 2026

Option expiration date October 1, 2028 Expiration date of the stock option from which 7,000 shares were exercised

Key Terms

Rule 10b5-1 plan, weighted average sale price, vested, equal monthly installments

4 terms

Rule 10b5-1 plan regulatory

"The transactions reported in this Form 4 occurred under a Rule 10b5-1 plan adopted by the Reporting Person on May 15, 2026."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

weighted average sale price financial

"The reported price in Column 4 is a weighted average sale price."

vested financial

"1/4 of the shares subject to the option vested on August 16, 2019, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service."

equal monthly installments financial

"1/4 of the shares subject to the option vested on August 16, 2019, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did AMBQ’s CTO Hanson Scott McLean report in this Form 4?

He exercised 7,000 stock options for Ambiq Micro, Inc. common stock at $8.12 per share and sold 7,000 shares in multiple transactions on September 15, 2026, all under a Rule 10b5-1 plan.

How many Ambiq Micro (AMBQ) options does the insider hold after these transactions?

After exercising options, the insider holds 45,279 stock options for Ambiq Micro, Inc. common stock directly, under an option that is scheduled to expire on October 1, 2028.

At what prices were the AMBQ shares sold in this Form 4?

Reported sales include 1,953 shares at a weighted average price of $59.5339 with a range of $58.93–$59.88, 4,947 shares at a weighted average of $60.5564 with a range of $59.97–$60.82, and 100 shares at $61.00.

Were the AMBQ insider transactions made under a Rule 10b5-1 plan?

Yes. The transactions were carried out under a Rule 10b5-1 trading plan that the reporting person adopted on May 15, 2026, as described in the filing’s footnotes.

What are the key terms of the AMBQ option exercised in this Form 4?

The stock option covers 7,000 shares of Ambiq Micro common stock at an exercise price of $8.12 per share. One quarter of the shares vested on August 16, 2019, with additional shares vesting in equal monthly installments, and the option expires on October 1, 2028.

Is this AMBQ Form 4 primarily an insider sale or a purchase?

It reports both an option exercise and share sales. The insider exercised 7,000 options to acquire shares and then sold 7,000 shares in several transactions at prices in the $59–61 range.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/17/2026 - 04:07 PM Accepted by SEC EDGAR 09/17/2026 - 04:06 PM Learn about SEC filing dates

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).

X

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)
09/15/2026

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	09/15/2026		M(1)		7,000	A	$8.12	228,226	D
Common Stock	09/15/2026		S(1)		1,953	D	$59.5339(2)	226,273	D
Common Stock	09/15/2026		S(1)		4,947	D	$60.5564(3)	221,326	D
Common Stock	09/15/2026		S(1)		100	D	$61	221,226	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)	$8.12	09/15/2026		M(1)			7,000	(4)	10/01/2028	Common Stock	7,000	$0	45,279	D

Explanation of Responses:

1. The transactions reported in this Form 4 occurred under a Rule 10b5-1 plan adopted by the Reporting Person on May 15, 2026.

2. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $58.93 to $59.88 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $59.97 to $60.82 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. 1/4 of the shares subject to the option vested on August 16, 2019, and 1/48 of the shares subject to the option vested in equal monthly installments thereafter, subject to the Reporting Person's continued service.

	/s/ Jeffrey Winzeler, Attorney-in-Fact	09/17/2026
	** 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)