Chang Carmen
SEC Form 4 insider trading activity
Chang Carmen has filed 4 SEC Form 4 filings (22 transaction rows) across 3 companies, including COUR, KRRO, SGP, with disclosures dating back to 2025. 3 of those filings fall inside the rolling window. Most recent filing: Jun 15, 2026.
On the most recent filing, Chang Carmen is listed as 10% Owner at Korro Bio, Inc. Inside the rolling window, Chang Carmen reported 2 open-market purchases totaling $17.3M in KRRO and SGP and no open-market sales. The largest disclosed transaction in the window is a purchase of 937,500 SGP shares on Feb 9, 2026, worth $15.0M.
Companies traded
Other insiders at COUR
Insider Buying
$17.3M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
3
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Chang Carmen made?
Chang Carmen has filed 4 SEC Form 4 filings (22 transaction rows) across 3 companies, including COUR, KRRO, SGP since 2025.
Which companies does Chang Carmen trade?
Chang Carmen has filed SEC Form 4 disclosures for 3 companies, including COUR, KRRO, SGP.
When was Chang Carmen's most recent SEC Form 4 filing?
Chang Carmen's most recent SEC Form 4 filing on Tracefour is dated Jun 15, 2026.
What is Chang Carmen's total buy and sell value in the current window?
Inside the rolling retention window, Chang Carmen bought $17.3M and sold $0 based on SEC Form 4 filings.
What was Chang Carmen's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 937,500 SGP shares on 2026-02-09, worth $15.0M, per SEC Form 4 filings.