Quentin S. Blackford

Companies

• Align TechnologyBoard member Aug 31, 2026 to now¹
• Paragon 28, Inc.Board member Aug 4, 2022 to now²
• iRhythm Holdings, Inc.Board member Oct 5, 2021 to now³
• iRhythm Holdings, Inc.Chief executive officer Oct 5, 2021 to now³
• iRhythm Holdings, Inc.President Oct 5, 2021 to now³
• Alphatec Holdings, Inc.Board member Oct 6, 2017 to now⁴
• Axogen, Inc.Board member May 6, 2019 to Apr 1, 2022⁵
• DexcomChief operating officer Mar 10, 2020 to Sep 10, 2021⁶
• DexcomChief financial officer Sep 8, 2017 to Mar 12, 2021⁷
• NuVasiveChief financial officer Aug 8, 2014 to Feb 10, 2017⁸

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• IiRhythm Holdings, Inc. IRTC226,008 shares⁹$25.0M at $110.48Aug 10, 2026
• AAlphatec Holdings, Inc. ATEC600,381 shares¹⁰$6.2M at $10.39Jun 10, 2026
• AAxogen, Inc. AXGN27,335 shares¹¹$944.3K at $34.55Mar 30, 2022
• P2Paragon 28, Inc.0 shares¹²Apr 21, 2025

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 10, 2026Sold 26,859 shares at $124.65 of iRhythm Holdings, Inc.⁹
• Aug 7, 2026Granted 48,534 shares of iRhythm Holdings, Inc.⁹
• Jun 10, 2026Granted 32,012 shares of Alphatec Holdings, Inc.¹⁰
• May 29, 2026Granted 178 shares at $96.82 of iRhythm Holdings, Inc.¹³
• Mar 2, 2026Sold 5,423 shares at $128.44 of iRhythm Holdings, Inc.¹⁴
• Mar 2, 2026Sold 4,043 shares at $128.44 of iRhythm Holdings, Inc.¹⁴
• Mar 2, 2026Sold 4,347 shares at $128.44 of iRhythm Holdings, Inc.¹⁴
• Feb 25, 2026Sold 25,540 shares at $135.42 of iRhythm Holdings, Inc.¹⁵
• Feb 25, 2026Granted 31,842 shares of iRhythm Holdings, Inc.¹⁶
• Feb 24, 2026Granted 46,687 shares of iRhythm Holdings, Inc.¹⁵
• Nov 3, 2025Sold 14,059 shares at $182.94 of iRhythm Holdings, Inc.¹⁷
• Aug 5, 2025Sold 306 shares at $165.00 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 3,174 shares at $163.93 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 1,514 shares at $163.30 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 1,600 shares at $161.92 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 4,905 shares at $160.73 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 9,775 shares at $160.06 of iRhythm Holdings, Inc.¹⁸
• Aug 5, 2025Sold 8,726 shares at $158.85 of iRhythm Holdings, Inc.¹⁸
• Jun 11, 2025Granted 15,131 shares of Alphatec Holdings, Inc.¹⁹
• May 30, 2025Granted 297 shares at $71.46 of iRhythm Holdings, Inc.²⁰
• May 5, 2025Gift 21,000 shares of Alphatec Holdings, Inc.²¹
• Apr 21, 2025Returned to company 50,554 shares of Paragon 28, Inc.¹²
• Mar 3, 2025Sold 8,145 shares at $108.77 of iRhythm Holdings, Inc.²²
• Feb 26, 2025Sold 22,252 shares at $112.13 of iRhythm Holdings, Inc.²³
• Feb 26, 2025Granted 38,599 shares of iRhythm Holdings, Inc.²³