Zhang Shuo
SEC Form 4 insider trading activity
Zhang Shuo has filed 5 SEC Form 4 filings (6 transaction rows) across 2 companies, including PDFS, GDYN, with disclosures dating back to 2025. 5 of those filings fall inside the rolling window. Most recent filing: Aug 13, 2026.
On the most recent filing, Zhang Shuo is listed as Director at PDF SOLUTIONS INC. Inside the rolling window, Zhang Shuo reported no open-market purchases and 2 open-market sales totaling $107K in PDFS and GDYN. The largest disclosed transaction in the window is a sale of 1,501 PDFS shares on Aug 12, 2026, worth $77K.
Companies traded
Other insiders at PDFS
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$107K
reported sales (SEC code S)
Companies
2
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Zhang Shuo made?
Zhang Shuo has filed 5 SEC Form 4 filings (6 transaction rows) across 2 companies, including PDFS, GDYN since 2025.
Which companies does Zhang Shuo trade?
Zhang Shuo has filed SEC Form 4 disclosures for 2 companies, including PDFS, GDYN.
When was Zhang Shuo's most recent SEC Form 4 filing?
Zhang Shuo's most recent SEC Form 4 filing on Tracefour is dated Aug 13, 2026.
What is Zhang Shuo's total buy and sell value in the current window?
Inside the rolling retention window, Zhang Shuo bought $0 and sold $107K based on SEC Form 4 filings.
What was Zhang Shuo's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 1,501 PDFS shares on 2026-08-12, worth $77K, per SEC Form 4 filings.