Insider filing · ATEC
David M Demski
Director
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Alphatec Holdings, Inc.
ATEC · Healthcare · 66 filings in 24 months
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David M Demski bought $409K of Alphatec (ATEC)
Executed Oct 30, disclosed Nov 2, 3 days later.
Value, as filed
$409K
60,000 sh × $6.81
Executed
Oct 30
the trade date, as filed
Disclosed
Nov 2
3 days after the trade
Return, 21 sessionsiFrom the disclosed entry session; derived
–
not yet measured
Not yet measured: the 21-session window has not closed, or the prices around it are not on record.
The filer
DDDavid M Demski (Director) filed 2 Form 4 reports in the trailing twelve months (1 purchase, 1 sale), most often in Alphatec Holdings, Inc. (ATEC). The largest single filing was $636K of ATEC (30,000 sh × $21.20, as filed), executed Dec 11 2025. The median gap between execution and disclosure was 3 days.
The name
ATECHealthcare · Alphatec Holdings, Inc., a medical technology company, designs, develops, and advances technologies for the surgical treatment of spinal di…
More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→Other filings by David M Demski in ATEC
ATECSALE
Alphatec Holdings, Inc.
$636K30,000 sh × $21.20
Exec Dec 11 2025
Filed Dec 12 2025 · 5:30 PM ET