Insider Profile · SEC Form 4 Activity · Trailing 90 Days

Chen Sean Chihhsiang

Over the trailing 90 days, Chen Sean Chihhsiang (Other at Ambiq Micro, Inc.) traded $4.3M of stock (net selling $3.6M) in AMBQ, per 4 SEC Form 4 transactions.

Role: Other
Companies: AMBQ
Window: Trailing 90 days · 4 transactions · CIK 2078559
Net activity: −$3.6M ($327K bought · $3.9M sold)
Source: Official filings on sec.gov ↗

By Company (Trailing 90 Days)

Symbol	Company	Txns	Bought	Sold	Net
AMBQ	Ambiq Micro, Inc.	4	$327K	$3.9M	−$3.6M

Transactions (4)

Date	Symbol	Type	Shares	Value	Description
2026-05-15	AMBQ	Sell	32.4K	$2.3M	Open market or private sale
2026-05-15	AMBQ	Buy	55.7K	$327K	Exercise or conversion of derivative security
2026-05-15	AMBQ	Sell	55.7K	$0	Exercise or conversion of derivative security
2026-05-15	AMBQ	Sell	23.3K	$1.7M	Open market or private sale

Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.

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