Venture fund tied to Ambiq Micro (AMBQ) director exercises 238,931-share warrant

Rhea-AI Filing Summary

Ambiq Micro director-related entity exercises warrants for common shares. Matter Venture Partners Fund I, L.P., for which HSIEH Wen Hsuan exercises sole voting and dispositive control, exercised a warrant for 238,931 shares of Ambiq Micro common stock through a derivative conversion at an exercise price of $12.60 per share. After the transaction, the fund held 633,920 shares of Ambiq Micro common stock indirectly attributable to HSIEH Wen Hsuan.

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

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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^*

HSIEH Wen Hsuan

(Last) (First) (Middle)

C/O AMBIQ MICRO, INC.

6500 RIVER PLACE BLVD BUILDING 7 STE 200

(Street)

AUSTIN TX 78730

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
02/18/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	02/18/2026		M		238,931	A	$12.6	633,920	I	By: Matter Venture Partners Fund I, L.P.(1)

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
Warrant (Right to Buy)	$12.6	02/18/2026		M			238,931	(2)	06/01/2034	Common Stock	238,931	$0	0	I	By: Matter Venture Partners Fund I, L.P.(1)

Explanation of Responses:

1. The Reporting Person exercises sole voting and dispositive control over the shares held by Matter Venture Partners Fund I, L.P.

2. The warrant is exercisable in whole or in part, on the earlier of (i) June 1, 2028, (ii) immediately prior to the completion of the Issuer's initial public offering or (iii) immediately prior to the consummation of an acquisition or asset transfer of the Issuer, until the warrant's expiration on June 1, 2034.

	/s/ Jeffrey Winzeler, Attorney-in-Fact	02/20/2026
	** 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.

FAQ

What insider transaction did HSIEH Wen Hsuan report at Ambiq Micro (AMBQ)?

HSIEH Wen Hsuan reported that Matter Venture Partners Fund I, L.P. exercised a warrant to acquire 238,931 Ambiq Micro common shares. The exercise converted a derivative security into common stock at $12.60 per share, increasing the fund’s indirect holdings to 633,920 shares.

Who actually holds the Ambiq Micro (AMBQ) shares from this Form 4 transaction?

The shares are held by Matter Venture Partners Fund I, L.P., not personally by HSIEH Wen Hsuan. However, HSIEH exercises sole voting and dispositive control over the fund’s Ambiq Micro shares, meaning key decisions on these shares are directed by him.

How many Ambiq Micro (AMBQ) shares were acquired through warrant exercise?

The filing shows a warrant exercise for 238,931 Ambiq Micro common shares. This came from converting a derivative security into stock, with the corresponding common shares recorded at an exercise price of $12.60 per share on the transaction date.

What was the resulting Ambiq Micro (AMBQ) share ownership after the transaction?

After the warrant exercise, Matter Venture Partners Fund I, L.P. held 633,920 Ambiq Micro common shares indirectly attributable to HSIEH Wen Hsuan. This reflects the updated non-derivative ownership position following conversion of the 238,931-share warrant into common stock.

What does transaction code M mean in this Ambiq Micro (AMBQ) Form 4?

Transaction code M indicates an exercise or conversion of a derivative security. In this case, a warrant was exercised to obtain 238,931 Ambiq Micro common shares, moving value from a derivative position into direct common stock held by the venture fund.