Quentin S. Blackford

IRTC

Quentin S. Blackford serves as director, officer: President and CEO at iRhythm Technologies, Inc. (IRTC). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

1 trades

$256.6K

Total Sells

10 trades

$34.42M

Net Position

Net Seller

$34.16M

Companies Traded

IRTC, ATEC, DXCM

Active Period

Mar 2021 – Aug 2026

11 total trades

Most Recent

Sell IRTC

Aug 11, 2026 · $3.35M

Quentin S. Blackford's Insider Trading at iRhythm Technologies, Inc. (IRTC)

Buys

0 · $0.00

Sells

7 · $19.13M

Total Shares Bought

Total Shares Sold

139,554

IRTC Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Aug 11, 2026	Sell	26,859	$124.65	$3.35M	226,008
Feb 26, 2026	Sell	25,540	$135.42	$3.46M	186,126
Nov 3, 2025	Sell	14,059	$182.94	$2.57M	0
Aug 5, 2025	Sell	30,000	$160.54	$4.82M	0
Mar 3, 2025	Sell	8,145	$108.77	$885.9K	0
Feb 25, 2025	Sell	22,252	$112.13	$2.50M	0
Nov 4, 2022	Sell	12,699	$122.40	$1.55M	101,695

Quentin S. Blackford's Insider Trading at DexCom, Inc. (DXCM)

Buys

0 · $0.00

Sells

3 · $15.29M

Total Shares Bought

Total Shares Sold

32,394

DXCM Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Sep 10, 2021	Sell	18,662	$547.62	$10.22M	30,303
Jun 1, 2021	Sell	7,223	$375.00	$2.71M	37,942
Mar 12, 2021	Sell	6,509	$362.22	$2.36M	45,165

Quentin S. Blackford's Insider Trading at Alphatec Holdings, Inc. (ATEC)

Buys

1 · $256.6K

Sells

0 · $0.00

Total Shares Bought

20,000

Total Shares Sold

ATEC Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Mar 7, 2024	Buy	20,000	$12.83	$256.6K	0

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DXCMSell · Sep 30, 2026

AUGUSTINOS NICHOLAS

director

DXCMSell · Sep 16, 2026

Jereme M Sylvain

officer: EVP, Chief Financal Officer

DXCMSell · Sep 14, 2026

Patrick Miles

director, officer: CEO

ATECBuy · Sep 10, 2026

Daniel G. Wilson

officer: Chief Financial Officer

IRTCSell · Sep 3, 2026

SAYER KEVIN R

Executive Chair

DXCMSell · Aug 24, 2026

Bridgette P Heller

Director

DXCMSell · Aug 13, 2026

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