Follow the people · Insider
Quentin S. Blackford
Quentin S. Blackford files insider transactions with the SEC as a director of Align Technology (ALGN). We hold 3 disclosed purchases and sales filed since 20 November 2014, 1 of them in the last 90 days.
- Files forALGN
- Disclosed buys and sells3 in all, 1 in the last 90 days
- Last disclosure11 August 2026
Positions held
7 posts we hold — a term names its own dates; a run of filings only says when they filed- Filed 27 August 2026 — 27 August 2026Director · Align Technology (ALGN)1 Form 4 line · source: SEC Form 4
- Filed 5 October 2021 — 10 August 2026President and CEO · iRhythm Technologies (IRTC)40 Form 4 lines · source: SEC Form 4
- Filed 28 December 2017 — 10 June 2026Director · Alphatec Holdings (ATEC)15 Form 4 lines · source: SEC Form 4
- Filed 1 August 2022 — 21 April 2025Director · Paragon 28 (FNA)4 Form 4 lines · source: SEC Form 4
- Filed 15 May 2019 — 30 March 2022Director · Axogen (AXGN)20 Form 4 lines · source: SEC Form 4
- Filed 7 September 2017 — 10 September 2021Chief Operating Officer · Dexcom (DXCM)67 Form 4 lines · source: SEC Form 4
- Filed 3 October 2014 — 8 February 2017CFO · Nuvasive (NUVA)41 Form 4 lines · source: SEC Form 4
Everything they disclosed
120 entries, newest first — one per disclosure report, one per Form 4 line- was granted 1,376 shares of Align Technology (a derivative holding)SEC Form 431 August 2026Restricted Stock Units · traded 27 August 2026 · filed 31 August 2026
- was granted 48,534 shares of iRhythm HoldingsSEC Form 411 August 2026Common Stock · traded 7 August 2026 · filed 11 August 2026
- ▼ sold on the open market 26,859 shares of iRhythm HoldingsSEC Form 411 August 2026Common Stock · traded 10 August 2026 · filed 11 August 2026
- was granted 32,012 shares of Alphatec HoldingsSEC Form 412 June 2026Common Stock · traded 10 June 2026 · filed 12 June 2026
- was granted 178 shares of iRhythm HoldingsSEC Form 41 June 2026Common Stock · traded 29 May 2026 · filed 1 June 2026
- ▼ sold on the open market 4,347 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 4,043 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 5,423 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 4,347 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 4,043 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 5,423 shares of iRhythm HoldingsSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- was granted 31,842 shares of iRhythm HoldingsSEC Form 427 February 2026Common Stock · traded 25 February 2026 · filed 27 February 2026
- was granted 31,842 shares of iRhythm HoldingsSEC Form 427 February 2026Common Stock · traded 25 February 2026 · filed 27 February 2026
- was granted 46,687 shares of iRhythm HoldingsSEC Form 426 February 2026Common Stock · traded 24 February 2026 · filed 26 February 2026
- ▼ sold on the open market 25,540 shares of iRhythm HoldingsSEC Form 426 February 2026Common Stock · traded 25 February 2026 · filed 26 February 2026
- was granted 46,687 shares of iRhythm HoldingsSEC Form 426 February 2026Common Stock · traded 24 February 2026 · filed 26 February 2026
- ▼ sold on the open market 25,540 shares of iRhythm HoldingsSEC Form 426 February 2026Common Stock · traded 25 February 2026 · filed 26 February 2026
- ▼ sold on the open market 14,059 shares of iRhythm TechnologiesSEC Form 44 November 2025Common Stock · traded 3 November 2025 · filed 4 November 2025
- ▼ sold on the open market 8,726 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 9,775 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 4,905 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 1,600 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 1,514 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 3,174 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- ▼ sold on the open market 306 shares of iRhythm TechnologiesSEC Form 46 August 2025Common Stock · traded 5 August 2025 · filed 6 August 2025
- was granted 15,131 shares of Alphatec HoldingsSEC Form 413 June 2025Common Stock · traded 11 June 2025 · filed 13 June 2025
- was granted 297 shares of iRhythm TechnologiesSEC Form 43 June 2025Common Stock · traded 30 May 2025 · filed 3 June 2025
- gave away 21,000 shares of Alphatec HoldingsSEC Form 46 May 2025Common Stock · traded 5 May 2025 · filed 6 May 2025
- returned to the issuer 50,554 shares of Paragon 28SEC Form 421 April 2025Common Stock · traded 21 April 2025 · filed 21 April 2025
- ▼ sold on the open market 8,145 shares of iRhythm TechnologiesSEC Form 44 March 2025Common Stock · traded 3 March 2025 · filed 4 March 2025
- was granted 40,610 shares of iRhythm TechnologiesSEC Form 427 February 2025Common Stock · traded 25 February 2025 · filed 27 February 2025
- was granted 38,599 shares of iRhythm TechnologiesSEC Form 427 February 2025Common Stock · traded 26 February 2025 · filed 27 February 2025
- ▼ sold on the open market 22,252 shares of iRhythm TechnologiesSEC Form 427 February 2025Common Stock · traded 26 February 2025 · filed 27 February 2025
- gave away 15,114 shares of Alphatec HoldingsSEC Form 45 December 2024Common Stock · traded 21 November 2024 · filed 5 December 2024
- was granted 280 shares of iRhythm TechnologiesSEC Form 45 November 2024Common Stock · traded 31 May 2024 · filed 5 November 2024
- ▼ sold on the open market 16,145 shares of iRhythm TechnologiesSEC Form 45 November 2024Common Stock · traded 4 November 2024 · filed 5 November 2024
- was granted 16,747 shares of Alphatec HoldingsSEC Form 414 June 2024Common Stock · traded 12 June 2024 · filed 14 June 2024
- was granted 15,906 shares of Paragon 28SEC Form 421 May 2024Common Stock · traded 17 May 2024 · filed 21 May 2024
- ▲ bought on the open market 20,000 shares of Alphatec HoldingsSEC Form 48 March 2024Common Stock · traded 7 March 2024 · filed 8 March 2024
- ▼ sold on the open market 4,221 shares of iRhythm TechnologiesSEC Form 45 March 2024Common Stock · traded 4 March 2024 · filed 5 March 2024
- was granted 30,938 shares of iRhythm TechnologiesSEC Form 41 March 2024Common Stock · traded 28 February 2024 · filed 1 March 2024
- ▼ sold on the open market 24,701 shares of iRhythm TechnologiesSEC Form 41 March 2024Common Stock · traded 29 February 2024 · filed 1 March 2024
- was granted 45,268 shares of iRhythm TechnologiesSEC Form 429 February 2024Common Stock · traded 27 February 2024 · filed 29 February 2024
- ▲ bought on the open market 9,755 shares of iRhythm TechnologiesSEC Form 46 December 2023Common Stock · traded 6 June 2023 · filed 6 December 2023
- was granted 9,908 shares of Alphatec HoldingsSEC Form 421 June 2023Common Stock · traded 20 June 2023 · filed 21 June 2023
- was granted 9,755 shares of iRhythm TechnologiesSEC Form 46 June 2023Common Stock · traded 6 June 2023 · filed 6 June 2023
- was granted 8,361 shares of Paragon 28SEC Form 419 May 2023Common Stock · traded 17 May 2023 · filed 19 May 2023
- was granted 28,775 shares of iRhythm TechnologiesSEC Form 41 March 2023Common Stock · traded 27 February 2023 · filed 1 March 2023
- ▼ sold on the open market 284 shares of iRhythm TechnologiesSEC Form 44 November 2022Common Stock · traded 2 November 2022 · filed 4 November 2022
- ▼ sold on the open market 12,415 shares of iRhythm TechnologiesSEC Form 44 November 2022Common Stock · traded 2 November 2022 · filed 4 November 2022
- was granted 16,287 shares of Paragon 28SEC Form 44 August 2022Common Stock · traded 1 August 2022 · filed 4 August 2022
- was granted 18,546 shares of Alphatec HoldingsSEC Form 417 June 2022Common Stock · traded 15 June 2022 · filed 17 June 2022
- exercised options over 3,036 shares of Axogen (a derivative holding)SEC Form 41 April 2022Restricted Stock Units · traded 30 March 2022 · filed 1 April 2022
- exercised options over 3,036 shares of AxogenSEC Form 41 April 2022Common Stock · traded 30 March 2022 · filed 1 April 2022
- was granted 101,979 shares of iRhythm TechnologiesSEC Form 47 October 2021Common Stock · traded 5 October 2021 · filed 7 October 2021
- ▼ sold on the open market 7,639 shares of DexcomSEC Form 410 September 2021Common Stock · traded 8 September 2021 · filed 10 September 2021
- ▼ sold on the open market 42 shares of DexcomSEC Form 410 September 2021Common Stock · traded 8 September 2021 · filed 10 September 2021
- ▼ sold on the open market 1,534 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 19 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 515 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 300 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 100 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 100 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 900 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 1,200 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 2,394 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 2,200 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 200 shares of DexcomSEC Form 410 September 2021Common Stock · traded 9 September 2021 · filed 10 September 2021
- ▼ sold on the open market 1,519 shares of DexcomSEC Form 410 September 2021Common Stock · traded 10 September 2021 · filed 10 September 2021
- was granted 10,221 shares of Alphatec HoldingsSEC Form 421 June 2021Common Stock · traded 16 June 2021 · filed 21 June 2021
- exercised options over 6,173 shares of Axogen (a derivative holding)SEC Form 43 June 2021Restricted Stock Units · traded 1 June 2021 · filed 3 June 2021
- was granted 6,030 shares of Axogen (a derivative holding)SEC Form 43 June 2021Stock Option (right to purchase) · traded 1 June 2021 · filed 3 June 2021
- was granted 3,036 shares of Axogen (a derivative holding)SEC Form 43 June 2021Restricted Stock Units · traded 1 June 2021 · filed 3 June 2021
- exercised options over 6,173 shares of AxogenSEC Form 43 June 2021Common Stock · traded 1 June 2021 · filed 3 June 2021
- ▼ sold on the open market 7,223 shares of DexcomSEC Form 41 June 2021Common Stock · traded 28 May 2021 · filed 1 June 2021
- ▼ sold on the open market 6,509 shares of DexcomSEC Form 412 March 2021Common Stock · traded 10 March 2021 · filed 12 March 2021
- was granted 7,491 shares of DexcomSEC Form 410 March 2021Common Stock · traded 8 March 2021 · filed 10 March 2021
- gave away 16,250 shares of Alphatec HoldingsSEC Form 426 January 2021Common Stock · traded 3 November 2020 · filed 26 January 2021
- ▼ sold on the open market 8,010 shares of DexcomSEC Form 411 September 2020Common Stock · traded 9 September 2020 · filed 11 September 2020
- ▼ sold on the open market 3,297 shares of DexcomSEC Form 411 September 2020Common Stock · traded 9 September 2020 · filed 11 September 2020
- ▼ sold on the open market 1,579 shares of DexcomSEC Form 411 September 2020Common Stock · traded 9 September 2020 · filed 11 September 2020
- ▼ sold on the open market 523 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 1,300 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 1,594 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 3,017 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 3,157 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 2,159 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 272 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- ▼ sold on the open market 171 shares of DexcomSEC Form 411 September 2020Common Stock · traded 10 September 2020 · filed 11 September 2020
- was granted 2,591 shares of AxogenSEC Form 48 September 2020Common Stock · traded 3 September 2020 · filed 8 September 2020
- was granted 28,013 shares of Alphatec HoldingsSEC Form 419 June 2020Common Stock · traded 17 June 2020 · filed 19 June 2020
- was granted 12,605 shares of Axogen (a derivative holding)SEC Form 412 June 2020Stock Option (right to purchase) · traded 1 June 2020 · filed 12 June 2020
- was granted 6,173 shares of Axogen (a derivative holding)SEC Form 412 June 2020Restricted Stock Units · traded 1 June 2020 · filed 12 June 2020
- ▲ bought on the open market 1,165 shares of AxogenSEC Form 45 June 2020Common Stock · traded 9 August 2019 · filed 5 June 2020
- ▲ bought on the open market 200 shares of AxogenSEC Form 45 June 2020Common Stock · traded 9 August 2019 · filed 5 June 2020
- ▲ bought on the open market 14,170 shares of AxogenSEC Form 45 June 2020Common Stock · traded 12 August 2019 · filed 5 June 2020
- was granted 16,807 shares of Axogen (a derivative holding)SEC Form 43 June 2020Stock Option (right to purchase) · traded 1 June 2020 · filed 3 June 2020
- was granted 4,115 shares of Axogen (a derivative holding)SEC Form 43 June 2020Restricted Stock Units · traded 1 June 2020 · filed 3 June 2020
- ▼ sold on the open market 116 shares of DexcomSEC Form 413 March 2020Common Stock · traded 11 March 2020 · filed 13 March 2020
- ▼ sold on the open market 129 shares of DexcomSEC Form 413 March 2020Common Stock · traded 11 March 2020 · filed 13 March 2020
- ▼ sold on the open market 5,963 shares of DexcomSEC Form 413 March 2020Common Stock · traded 11 March 2020 · filed 13 March 2020
- ▼ sold on the open market 583 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 200 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 200 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 457 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 400 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 200 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 200 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 300 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 472 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 641 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 600 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 1,100 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 500 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 400 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- ▼ sold on the open market 100 shares of DexcomSEC Form 413 March 2020Common Stock · traded 12 March 2020 · filed 13 March 2020
- was granted 12,727 shares of DexcomSEC Form 410 March 2020Common Stock · traded 8 March 2020 · filed 10 March 2020
- ▼ sold on the open market 891 shares of DexcomSEC Form 410 March 2020Common Stock · traded 9 March 2020 · filed 10 March 2020
- ▼ sold on the open market 1,800 shares of DexcomSEC Form 412 September 2019Common Stock · traded 10 September 2019 · filed 12 September 2019
- ▼ sold on the open market 2,500 shares of DexcomSEC Form 412 September 2019Common Stock · traded 10 September 2019 · filed 12 September 2019
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.