CHANG DAVID C
SEC Form 4 insider trading activity
CHANG DAVID C has filed 7 SEC Form 4 filings (9 transaction rows) across 1 company, with disclosures dating back to 2025. 7 of those filings fall inside the rolling window. Most recent filing: Jun 17, 2026.
On the most recent filing, CHANG DAVID C is listed as Director at AXT INC. Inside the rolling window, CHANG DAVID C reported no open-market purchases and 8 open-market sales totaling $5.2M in AXTI. The largest disclosed transaction in the window is a sale of 8,333 AXTI shares on Jun 15, 2026, worth $926K.
Companies traded
Other insiders at AXTI
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$5.2M
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| AXTI | Director | Sale | 8,333 | $926K | Jun 17 | SEC ↗ | |
| AXTI | Director | Sale | 20,000 | $920K | Mar 12 | SEC ↗ | |
| AXTI | Director | Sale | 20,000 | $771K | Mar 5 | SEC ↗ | |
| AXTI | Director | Sale | 20,000 | $768K | Mar 5 | SEC ↗ | |
| AXTI | Director | Sale | 25,000 | $371K | Dec 10 | SEC ↗ | |
| AXTI | Director | Sale | 25,000 | $268K | Dec 2 | SEC ↗ | |
| AXTI | Director | Sale | 25,000 | $308K | Dec 2 | SEC ↗ | |
| AXTI | Director | Sale | 100,000 | $894K | Nov 6 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has CHANG DAVID C made?
CHANG DAVID C has filed 7 SEC Form 4 filings (9 transaction rows) across 1 company since 2025.
Which companies does CHANG DAVID C trade?
CHANG DAVID C has filed SEC Form 4 disclosures for 1 company, including AXTI.
When was CHANG DAVID C's most recent SEC Form 4 filing?
CHANG DAVID C's most recent SEC Form 4 filing on Tracefour is dated Jun 17, 2026.
What is CHANG DAVID C's total buy and sell value in the current window?
Inside the rolling retention window, CHANG DAVID C bought $0 and sold $5.2M based on SEC Form 4 filings.
What was CHANG DAVID C's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 8,333 AXTI shares on 2026-06-15, worth $926K, per SEC Form 4 filings.