Liu Brian Guan-Chyun
SEC Form 4 insider trading activity
Liu Brian Guan-Chyun has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company, with disclosures dating back to 2025. 1 of those filings fall inside the rolling window. Most recent filing: Jun 29, 2026.
On the most recent filing, Liu Brian Guan-Chyun is listed as Director at CG Oncology, Inc. Inside the rolling window, Liu Brian Guan-Chyun reported 1 open-market purchase totaling $24.8M in CGON and no open-market sales.
Companies traded
Other insiders at CGON
Insider Buying
$24.8M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Sep 11, 2025 | CGON | Purchase | $50.0M |
Frequently asked questions
How many SEC Form 4 filings has Liu Brian Guan-Chyun made?
Liu Brian Guan-Chyun has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company since 2025.
Which companies does Liu Brian Guan-Chyun trade?
Liu Brian Guan-Chyun has filed SEC Form 4 disclosures for 1 company, including CGON.
When was Liu Brian Guan-Chyun's most recent SEC Form 4 filing?
Liu Brian Guan-Chyun's most recent SEC Form 4 filing on Tracefour is dated Jun 29, 2026.
What is Liu Brian Guan-Chyun's total buy and sell value in the current window?
Inside the rolling retention window, Liu Brian Guan-Chyun bought $24.8M and sold $0 based on SEC Form 4 filings.
What was Liu Brian Guan-Chyun's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 371,085 CGON shares on 2026-06-25, worth $24.8M, per SEC Form 4 filings.