Form 4/A for AMBQ Ambiq Micro, Inc.

Accepted 2026-05-29 19:49:21 ET · period of report 2025-07-29 · accession 0001818099-26-000006 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
DAI	2026-05-29 19:49	2025-07-31	AMBQ	Chen Timothy	Dir	C - Cnv Deriv	—	+70.6K	70.6K	New	—
DAI	2026-05-29 19:49	2025-07-31	AMBQ	Chen Timothy	Dir	C - Cnv Deriv	$0.00	-1.71M	0	-100%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2025-07-31	C	A	70,592	—	70,592	I By: Triumph Way Investment Inc.	—	—	(F1) The Series F-1 Convertible Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering of common stock and had no expiration date. (F2) The Reporting Person exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc.
2	Derivative	Series F-1 Convertible Preferred Stock	2025-07-31	C	D	1,707,853	$0.00	0	I By: Triumph Way Investment Inc.	— · — to —	70,592 Common Stock	(F1) The Series F-1 Convertible Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering of common stock and had no expiration date. (F1) The Series F-1 Convertible Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering of common stock and had no expiration date. (F1) The Series F-1 Convertible Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering of common stock and had no expiration date. (F2) The Reporting Person exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc.