Demski David M
SEC Form 4 insider trading activity
Demski David M has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company, with disclosures dating back to 2025. 2 of those filings fall inside the rolling window. Most recent filing: Jun 12, 2026.
On the most recent filing, Demski David M is listed as Director at Alphatec Holdings, Inc. Inside the rolling window, Demski David M reported no open-market purchases and 1 open-market sale totaling $636K in ATEC.
Companies traded
Other insiders at ATEC
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$636K
reported sales (SEC code S)
Companies
1
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Demski David M made?
Demski David M has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company since 2025.
Which companies does Demski David M trade?
Demski David M has filed SEC Form 4 disclosures for 1 company, including ATEC.
When was Demski David M's most recent SEC Form 4 filing?
Demski David M's most recent SEC Form 4 filing on Tracefour is dated Jun 12, 2026.
What is Demski David M's total buy and sell value in the current window?
Inside the rolling retention window, Demski David M bought $0 and sold $636K based on SEC Form 4 filings.
What was Demski David M's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 30,000 ATEC shares on 2025-12-11, worth $636K, per SEC Form 4 filings.