Quentin S. Blackford

CIK 1612451 · View on SEC EDGAR ↗

Insider

First SEC filing: April 1, 2022 · Latest: April 1, 2022

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Insider transactions

0 buys (P) 1 sells (S) Net: $-3,347,974 + 31 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

31 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Aug. 10, 2026 IRTC S 26,859 $124.65 $3,347,974 226,008 Direct -10.62% Disposed 2.8% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 8,726 $158.85 $1,386,125 200,312 Direct -4.17% Disposed -19.3% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 9,775 $160.06 $1,564,586 190,537 Direct -4.88% Disposed -20.0% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 4,905 $160.73 $788,381 185,632 Direct -2.57% Disposed -20.3% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 1,600 $161.92 $259,072 184,032 Direct -0.86% Disposed -20.9% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 1,514 $163.30 $247,236 182,518 Direct -0.82% Disposed -21.5% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 3,174 $163.93 $520,314 179,344 Direct -1.74% Disposed -21.8% (price as of 2026-08-21)
Aug. 5, 2025 IRTC S 10b5-1 306 $165.00 $50,490 179,038 Direct -0.17% Disposed -22.4% (price as of 2026-08-21)
March 3, 2025 IRTC S 8,145 $108.77 $885,932 208,741 Direct -3.76% Disposed 17.8% (price as of 2026-08-21)
Feb. 26, 2025 IRTC S 22,252 $112.13 $2,495,117 216,886 Direct -9.31% Disposed 14.3% (price as of 2026-08-21)
Nov. 4, 2024 IRTC S 16,145 $77.41 $1,249,784 159,929 Direct -9.17% Disposed 65.5% (price as of 2026-08-21)
March 7, 2024 ATEC P 20,000 $12.83 $256,600 572,605 Direct +3.62% Acquired -28.4% (price as of 2026-08-21)
March 4, 2024 IRTC S 4,221 $111.14 $469,122 175,794 Direct -2.34% Disposed 15.3% (price as of 2026-08-21)
Feb. 29, 2024 IRTC S 24,701 $121.96 $3,012,534 180,015 Direct -12.07% Disposed 5.1% (price as of 2026-08-21)
June 6, 2023 IRTC P 9,755 $102.27 $997,644 128,510 Direct +8.21% Acquired 25.3% (price as of 2026-08-21)
Nov. 2, 2022 IRTC S 284 $118.17 $33,560 101,695 Direct -0.28% Disposed 8.4% (price as of 2026-08-21)
Nov. 2, 2022 IRTC S 12,415 $122.50 $1,520,838 89,280 Direct -12.21% Disposed 4.6% (price as of 2026-08-21)
Sept. 10, 2021 DXCM S 10b5-1 1,519 $558.33 $848,103 19,280 Direct -7.30% Disposed -35.9% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 200 $551.28 $110,256 20,799 Direct -0.95% Disposed -35.1% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 2,200 $550.51 $1,211,122 20,999 Direct -9.48% Disposed -35.0% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 2,394 $549.45 $1,315,383 23,199 Direct -9.35% Disposed -34.9% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 1,200 $548.40 $658,080 25,593 Direct -4.48% Disposed -34.8% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 900 $547.28 $492,552 26,793 Direct -3.25% Disposed -34.6% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 100 $545.10 $54,510 27,693 Direct -0.36% Disposed -34.4% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 100 $543.66 $54,366 27,793 Direct -0.36% Disposed -34.2% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 300 $542.83 $162,849 27,893 Direct -1.06% Disposed -34.1% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 515 $541.45 $278,847 28,193 Direct -1.79% Disposed -33.9% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 19 $542.03 $10,299 28,708 Direct -0.07% Disposed -34.0% (price as of 2026-08-21)
Sept. 9, 2021 DXCM S 10b5-1 1,534 $541.36 $830,446 28,727 Direct -5.07% Disposed -33.9% (price as of 2026-08-21)
Sept. 8, 2021 DXCM S 10b5-1 42 $546.31 $22,945 30,261 Direct -0.14% Disposed -34.5% (price as of 2026-08-21)
Sept. 8, 2021 DXCM S 10b5-1 7,639 $545.87 $4,169,901 30,303 Direct -20.13% Disposed -34.5% (price as of 2026-08-21)
May 28, 2021 DXCM S 10b5-1 7,223 $375.00 $2,708,625 37,942 Direct -15.99% Disposed -4.6% (price as of 2026-08-21)
March 10, 2021 DXCM S 6,509 $362.22 $2,357,690 45,165 Direct -12.60% Disposed -1.2% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 171 $405.33 $69,311 44,124 Direct -0.39% Disposed -11.7% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 272 $403.87 $109,853 44,295 Direct -0.61% Disposed -11.4% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 2,159 $402.72 $869,472 44,567 Direct -4.62% Disposed -11.2% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 3,157 $401.79 $1,268,451 46,726 Direct -6.33% Disposed -11.0% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 3,017 $399.91 $1,206,528 49,883 Direct -5.70% Disposed -10.5% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 1,594 $398.98 $635,974 52,900 Direct -2.93% Disposed -10.3% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 1,300 $397.76 $517,088 54,494 Direct -2.33% Disposed -10.1% (price as of 2026-08-21)
Sept. 10, 2020 DXCM S 10b5-1 523 $397.03 $207,647 55,794 Direct -0.93% Disposed -9.9% (price as of 2026-08-21)
Sept. 9, 2020 DXCM S 10b5-1 1,579 $398.30 $628,916 56,317 Direct -2.73% Disposed -10.2% (price as of 2026-08-21)
Sept. 9, 2020 DXCM S 10b5-1 3,297 $398.30 $1,313,195 57,896 Direct -5.39% Disposed -10.2% (price as of 2026-08-21)
Sept. 9, 2020 DXCM S 10b5-1 8,010 $398.30 $3,190,383 61,193 Direct -11.57% Disposed -10.2% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 100 $244.78 $24,478 69,203 Direct -0.14% Disposed 46.2% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 400 $244.01 $97,604 69,303 Direct -0.57% Disposed 46.6% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 500 $241.06 $120,530 69,703 Direct -0.71% Disposed 48.4% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 1,100 $239.63 $263,593 70,203 Direct -1.54% Disposed 49.3% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 600 $238.29 $142,974 71,303 Direct -0.83% Disposed 50.1% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 641 $237.10 $151,981 71,903 Direct -0.88% Disposed 50.9% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 472 $235.90 $111,345 72,544 Direct -0.65% Disposed 51.7% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 300 $234.23 $70,269 73,016 Direct -0.41% Disposed 52.7% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 200 $232.00 $46,400 73,316 Direct -0.27% Disposed 54.2% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 200 $228.86 $45,772 73,516 Direct -0.27% Disposed 56.3% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 400 $227.56 $91,024 73,716 Direct -0.54% Disposed 57.2% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 457 $223.62 $102,194 74,116 Direct -0.61% Disposed 60.0% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 200 $220.50 $44,100 74,573 Direct -0.27% Disposed 62.2% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 200 $219.36 $43,872 74,773 Direct -0.27% Disposed 63.1% (price as of 2026-08-21)
March 12, 2020 DXCM S 10b5-1 583 $218.84 $127,584 74,973 Direct -0.77% Disposed 63.5% (price as of 2026-08-21)
March 11, 2020 DXCM S 10b5-1 5,963 $265.43 $1,582,759 75,556 Direct -7.31% Disposed 34.8% (price as of 2026-08-21)
March 11, 2020 DXCM S 10b5-1 129 $251.03 $32,383 81,519 Direct -0.16% Disposed 42.5% (price as of 2026-08-21)
March 11, 2020 DXCM S 10b5-1 116 $246.61 $28,607 81,648 Direct -0.14% Disposed 45.1% (price as of 2026-08-21)
March 9, 2020 DXCM S 10b5-1 891 $261.00 $232,551 81,764 Direct -1.08% Disposed 37.1% (price as of 2026-08-21)
Sept. 10, 2019 DXCM S 10b5-1 600 $144.57 $86,742 69,754 Direct -0.85% Disposed 147.5% (price as of 2026-08-21)
Sept. 10, 2019 DXCM S 10b5-1 406 $143.57 $58,289 70,354 Direct -0.57% Disposed 149.2% (price as of 2026-08-21)
Sept. 10, 2019 DXCM S 10b5-1 1,289 $142.16 $183,244 70,760 Direct -1.79% Disposed 151.7% (price as of 2026-08-21)
Aug. 12, 2019 AXGN P 14,170 $14.10 $199,797 15,535 Direct +1038.10% Acquired 229.9% (price as of 2026-08-21)
Aug. 9, 2019 AXGN P 200 $13.07 $2,614 1,365 Direct +17.17% Acquired 255.9% (price as of 2026-08-21)
Aug. 9, 2019 AXGN P 1,165 $13.10 $15,262 1,165 Direct — Acquired 255.1% (price as of 2026-08-21)

Showing latest 100 of 126 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
March 30, 2022 AXGN Restricted Stock Units Common Stock (3,036) — — 3,036 Disposed
June 1, 2021 AXGN Restricted Stock Units Common Stock (6,173) — — 6,173 Disposed
June 1, 2021 AXGN Stock Option (right to purchase) Common Stock (6,030) $19.76 June 1, 2031 6,030 Acquired
June 1, 2021 AXGN Restricted Stock Units Common Stock (3,036) — — 3,036 Acquired
June 1, 2020 AXGN Restricted Stock Units Common Stock — — 6,173 Acquired
June 1, 2020 AXGN Stock Option (right to purchase) Common Stock $9.72 June 1, 2030 12,605 Acquired
June 1, 2020 AXGN Restricted Stock Units Common Stock (4,115) — — 4,115 Acquired
June 1, 2020 AXGN Stock Option (right to purchase) Common Stock (16,807) $9.72 June 1, 2030 16,807 Acquired
Sept. 3, 2019 AXGN Restricted Stock Units Common Stock (2,591) — — 2,591 Acquired
Sept. 3, 2019 AXGN Stock Option (right to purchase) Common Stock (10,710) $15.44 Sept. 3, 2029 10,710 Acquired
May 15, 2019 AXGN Stock Option (right to purchase) Common Stock (23,933) $22.99 May 15, 2022 23,933 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
Oct. 6, 2017 ATEC No Securities Beneficially Owned 0 Direct
Sept. 8, 2017 DXCM Common Stock 1,398 Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

DXCM

Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2017 $150,000 $150,000 — — $369,563 — $3,940 $5,115,201

IRTC

CEO
Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2022 $650,000 $675,000 $5,787,285 — $829,000 — — $7,941,285

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.