Form 4 Tracker
Quentin S. Blackford

Director; Director, President and CEO · 5 filings · Latest: Jun 10, 2026

Alphatec Holdings, Inc.
iRhythm Holdings, Inc.
TickerOwnerRelationshipDateTransactionCost#SharesValue ($)#Shares TotalSEC Filing
IRTC
Quentin S. BlackfordDirector, President and CEOMar 2, 2026
Sale
$128.4413,813$1.8M204,155
IRTC
Quentin S. BlackfordDirector, President and CEOFeb 25, 2026
Sale
$135.4225,540$3.5M186,126
IRTC
QUENTIN BLACKFORDAug 5, 2025
Proposed Sale
$160.5430,000$4.8M