Blackford Quentin S.
President and CEO
Blackford Quentin S. has filed 8 SEC Form 4 filings (18 transaction rows) across 2 companies, including IRTC, ATEC, with disclosures dating back to 2025. 7 of those filings fall inside the rolling window. Most recent filing: Aug 11, 2026.
On the most recent filing, Blackford Quentin S. is listed as President and CEO at iRhythm Holdings, Inc. Inside the rolling window, Blackford Quentin S. reported no open-market purchases and 4 open-market sales totaling $11.2M in IRTC. The largest disclosed transaction in the window is a sale of 25,540 IRTC shares on Feb 25, 2026, worth $3.5M.
Companies traded
Other insiders at IRTC
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$11.2M
reported sales (SEC code S)
Companies
2
in the rolling window
Frequently asked questions
How many SEC Form 4 filings has Blackford Quentin S. made?
Blackford Quentin S. has filed 8 SEC Form 4 filings (18 transaction rows) across 2 companies, including IRTC, ATEC since 2025.
Which companies does Blackford Quentin S. trade?
Blackford Quentin S. has filed SEC Form 4 disclosures for 2 companies, including IRTC, ATEC.
When was Blackford Quentin S.'s most recent SEC Form 4 filing?
Blackford Quentin S.'s most recent SEC Form 4 filing on Tracefour is dated Aug 11, 2026.
What is Blackford Quentin S.'s job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Blackford Quentin S. is listed as President and CEO.
What is Blackford Quentin S.'s total buy and sell value in the current window?
Inside the rolling retention window, Blackford Quentin S. bought $0 and sold $11.2M based on SEC Form 4 filings.
What was Blackford Quentin S.'s largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 25,540 IRTC shares on 2026-02-25, worth $3.5M, per SEC Form 4 filings.