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Blackford Quentin S.

Insider CIK 1612451 · DXCM EVP, CFO, PFO & PAO · ALGN Director · NUVA CFO and CAO · ATEC Director · IRTC President and CEO, Director · FNA Director · AXGN Director

Track record PRO

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Track record
See how this insider's past purchases performed 30 and 90 days later, and a conviction score on each buy.
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Trades across companies

TickerCodeTradeFiledSharesPriceValueOwned after
ALGN ALIGN TECHNOLOGY INC A Award deriv2026-08-272026-08-311,376— $01,376SEC↗
ALGN ALIGN TECHNOLOGY INC A Award deriv2026-08-272026-08-311,376— $01,376SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-08-102026-08-1126,859$124.65 $3.35M226,008SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-08-102026-08-1126,859$124.65 $3.35M226,008SEC↗
IRTC iRhythm Holdings, Inc. A Award2026-08-072026-08-1148,534— $0252,867SEC↗
IRTC iRhythm Holdings, Inc. A Award2026-08-072026-08-1148,534— $0252,867SEC↗
ATEC Alphatec Holdings, Inc. A Award2026-06-102026-06-1232,012— $0600,381SEC↗
IRTC iRhythm Holdings, Inc. A Award2026-05-292026-06-01178$96.82 $17.2K204,333SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-03-022026-03-034,347$128.44 $558.3K213,621SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-03-022026-03-035,423$128.44 $696.5K204,155SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-03-022026-03-034,043$128.44 $519.3K209,578SEC↗
IRTC iRhythm Holdings, Inc. S Sale2026-02-252026-02-2625,540$135.42 $3.46M186,126SEC↗
IRTC iRhythm Holdings, Inc. A Award2026-02-252026-02-2731,842— $0217,968SEC↗
IRTC iRhythm Holdings, Inc. A Award2026-02-242026-02-2646,687— $0211,666SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-11-032025-11-0414,059$182.94 $2.57M164,979SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-064,905$160.73 $788.4K185,632SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-068,726$158.85 $1.39M200,312SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-063,174$163.93 $520.3K179,344SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-061,514$163.30 $247.2K182,518SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-061,600$161.92 $259.1K184,032SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-06306$165.00 $50.5K179,038SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-08-052025-08-069,775$160.06 $1.56M190,537SEC↗
ATEC Alphatec Holdings, Inc. A Award2025-06-112025-06-1315,131— $0568,369SEC↗
IRTC iRhythm Technologies, Inc. A Award2025-05-302025-06-03297$71.46 $21.2K209,038SEC↗
ATEC Alphatec Holdings, Inc. G Gift2025-05-052025-05-0621,000— $0553,238SEC↗
FNA Paragon 28, Inc. D To issuer2025-04-212025-04-2150,554— $00SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-03-032025-03-048,145$108.77 $885.9K208,741SEC↗
IRTC iRhythm Technologies, Inc. S Sale2025-02-262025-02-2722,252$112.13 $2.50M216,886SEC↗
IRTC iRhythm Technologies, Inc. A Award2025-02-262025-02-2738,599— $0239,138SEC↗
IRTC iRhythm Technologies, Inc. A Award2025-02-252025-02-2740,610— $0200,539SEC↗
ATEC Alphatec Holdings, Inc. G Gift2024-11-212024-12-0515,114— $0574,238SEC↗
IRTC iRhythm Technologies, Inc. S Sale2024-11-042024-11-0516,145$77.41 $1.25M159,929SEC↗
ATEC Alphatec Holdings, Inc. A Award2024-06-122024-06-1416,747— $0589,352SEC↗
IRTC iRhythm Technologies, Inc. A Award2024-05-312024-11-05280$74.98 $21.0K176,074SEC↗
FNA Paragon 28, Inc. A Award2024-05-172024-05-2115,906— $050,554SEC↗
ATEC Alphatec Holdings, Inc. P Buy2024-03-072024-03-0820,000$12.83 $256.6K572,605SEC↗
IRTC iRhythm Technologies, Inc. S Sale2024-03-042024-03-054,221$111.14 $469.1K175,794SEC↗
IRTC iRhythm Technologies, Inc. S Sale2024-02-292024-03-0124,701$121.96 $3.01M180,015SEC↗
IRTC iRhythm Technologies, Inc. A Award2024-02-282024-03-0130,938— $0204,716SEC↗
IRTC iRhythm Technologies, Inc. A Award2024-02-272024-02-2945,268— $0173,778SEC↗
ATEC Alphatec Holdings, Inc. A Award2023-06-202023-06-219,908— $0552,605SEC↗
IRTC iRhythm Technologies, Inc. P Buy2023-06-062023-12-069,755$102.27 $997.6K128,510SEC↗
IRTC iRhythm Technologies, Inc. A Award2023-06-062023-06-069,755$102.27 $997.6K128,510SEC↗
FNA Paragon 28, Inc. A Award2023-05-172023-05-198,361— $034,648SEC↗
IRTC iRhythm Technologies, Inc. A Award2023-02-272023-03-0128,775— $0118,524SEC↗
IRTC iRhythm Technologies, Inc. S Sale2022-11-022022-11-0412,415$122.50 $1.52M89,280SEC↗
IRTC iRhythm Technologies, Inc. S Sale2022-11-022022-11-04284$118.17 $33.6K101,695SEC↗
FNA Paragon 28, Inc. A Award2022-08-012022-08-0416,287$18.42 $300.0K16,287SEC↗
ATEC Alphatec Holdings, Inc. A Award2022-06-152022-06-1718,546— $0542,697SEC↗
AXGN Axogen, Inc. M Exercise deriv2022-03-302022-04-013,036— $00SEC↗
AXGN Axogen, Inc. M Exercise2022-03-302022-04-013,036— $027,335SEC↗
IRTC iRhythm Technologies, Inc. A Award2021-10-052021-10-07101,979— $0101,979SEC↗
DXCM DEXCOM INC S Sale2021-09-102021-09-101,519$558.33 $848.1K19,280SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10200$551.28 $110.3K20,799SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-102,200$550.51 $1.21M20,999SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-102,394$549.45 $1.32M23,199SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-101,200$548.40 $658.1K25,593SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10900$547.28 $492.6K26,793SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10100$545.10 $54.5K27,693SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10100$543.66 $54.4K27,793SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-101,534$541.36 $830.4K28,727SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-1019$542.03 $10.3K28,708SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10300$542.83 $162.8K27,893SEC↗
DXCM DEXCOM INC S Sale2021-09-092021-09-10515$541.45 $278.8K28,193SEC↗
DXCM DEXCOM INC S Sale2021-09-082021-09-107,639$545.87 $4.17M30,303SEC↗
DXCM DEXCOM INC S Sale2021-09-082021-09-1042$546.31 $22.9K30,261SEC↗
ATEC Alphatec Holdings, Inc. A Award2021-06-162021-06-2110,221— $0524,151SEC↗
AXGN Axogen, Inc. M Exercise deriv2021-06-012021-06-036,173— $00SEC↗
AXGN Axogen, Inc. A Award deriv2021-06-012021-06-036,030— $06,030SEC↗
AXGN Axogen, Inc. A Award deriv2021-06-012021-06-033,036— $03,036SEC↗
AXGN Axogen, Inc. M Exercise2021-06-012021-06-036,173— $024,299SEC↗
DXCM DEXCOM INC S Sale2021-05-282021-06-017,223$375.00 $2.71M37,942SEC↗
DXCM DEXCOM INC S Sale2021-03-102021-03-126,509$362.22 $2.36M45,165SEC↗
DXCM DEXCOM INC A Award2021-03-082021-03-107,491— $051,674SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-111,594$398.98 $636.0K52,900SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-111,300$397.76 $517.1K54,494SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-11523$397.03 $207.6K55,794SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-11171$405.33 $69.3K44,124SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-113,017$399.91 $1.21M49,883SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-113,157$401.79 $1.27M46,726SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-112,159$402.72 $869.5K44,567SEC↗
DXCM DEXCOM INC S Sale2020-09-102020-09-11272$403.87 $109.9K44,295SEC↗
DXCM DEXCOM INC S Sale2020-09-092020-09-113,297$398.30 $1.31M57,896SEC↗
DXCM DEXCOM INC S Sale2020-09-092020-09-118,010$398.30 $3.19M61,193SEC↗
DXCM DEXCOM INC S Sale2020-09-092020-09-111,579$398.30 $628.9K56,317SEC↗
AXGN Axogen, Inc. A Award2020-09-032020-09-082,591$11.75 $30.4K18,126SEC↗
ATEC Alphatec Holdings, Inc. A Award2020-06-172020-06-1928,013— $0530,180SEC↗
AXGN Axogen, Inc. A Award deriv2020-06-012020-06-0316,807— $016,807SEC↗
AXGN Axogen, Inc. A Award deriv2020-06-012020-06-034,115— $04,115SEC↗
AXGN Axogen, Inc. A Award deriv2020-06-012020-06-1212,605— $012,605SEC↗
AXGN Axogen, Inc. A Award deriv2020-06-012020-06-126,173— $06,173SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13600$238.29 $143.0K71,303SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13641$237.10 $152.0K71,903SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13472$235.90 $111.3K72,544SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13300$234.23 $70.3K73,016SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13200$232.00 $46.4K73,316SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13200$228.86 $45.8K73,516SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13400$227.56 $91.0K73,716SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13100$244.78 $24.5K69,203SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13200$220.50 $44.1K74,573SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13200$219.37 $43.9K74,773SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13583$218.84 $127.6K74,973SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-131,100$239.63 $263.6K70,203SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13500$241.06 $120.5K69,703SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13400$244.01 $97.6K69,303SEC↗
DXCM DEXCOM INC S Sale2020-03-122020-03-13457$223.62 $102.2K74,116SEC↗
DXCM DEXCOM INC S Sale2020-03-112020-03-135,963$265.43 $1.58M75,556SEC↗
DXCM DEXCOM INC S Sale2020-03-112020-03-13129$251.03 $32.4K81,519SEC↗
DXCM DEXCOM INC S Sale2020-03-112020-03-13116$246.61 $28.6K81,648SEC↗
DXCM DEXCOM INC S Sale2020-03-092020-03-10891$261.00 $232.6K81,764SEC↗
DXCM DEXCOM INC A Award2020-03-082020-03-1012,727— $082,655SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-12406$143.57 $58.3K70,354SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-121,800$139.29 $250.7K78,274SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-122,500$140.47 $351.2K75,774SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-123,725$141.62 $527.5K72,049SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-121,289$142.16 $183.2K70,760SEC↗
DXCM DEXCOM INC S Sale2019-09-102019-09-12600$144.57 $86.7K69,754SEC↗
DXCM DEXCOM INC S Sale2019-09-092019-09-1111,049$150.11 $1.66M80,074SEC↗
DXCM DEXCOM INC S Sale2019-09-092019-09-11637$145.45 $92.7K91,123SEC↗
AXGN Axogen, Inc. A Award deriv2019-09-032019-09-052,591— $02,591SEC↗
AXGN Axogen, Inc. A Award deriv2019-09-032019-09-0510,710— $010,710SEC↗
AXGN Axogen, Inc. P Buy2019-08-122020-06-0514,170$14.10 $199.8K15,535SEC↗
AXGN Axogen, Inc. P Buy2019-08-122019-08-1314,170$14.10 $199.8K39,468SEC↗
AXGN Axogen, Inc. P Buy2019-08-092020-06-05200$13.07 $2.6K1,365SEC↗
AXGN Axogen, Inc. P Buy2019-08-092020-06-051,165$13.10 $15.3K1,165SEC↗
AXGN Axogen, Inc. P Buy2019-08-092019-08-131,165$13.10 $15.3K25,098SEC↗
AXGN Axogen, Inc. P Buy2019-08-092019-08-13200$13.07 $2.6K25,298SEC↗
ATEC Alphatec Holdings, Inc. A Award2019-06-212019-06-2518,086— $0502,167SEC↗
DXCM DEXCOM INC S Sale2019-05-292019-05-305,498$118.73 $652.8K95,116SEC↗
DXCM DEXCOM INC S Sale2019-05-292019-05-303,376$119.30 $402.8K91,740SEC↗
AXGN Axogen, Inc. A Award deriv2019-05-152019-05-1723,933— $023,933SEC↗
DXCM DEXCOM INC S Sale2019-03-122019-03-135,358$142.79 $765.1K100,614SEC↗
DXCM DEXCOM INC A Award2019-03-082019-03-1118,432— $0105,972SEC↗
DXCM DEXCOM INC S Sale2018-09-112018-09-133,680$148.22 $545.4K87,131SEC↗
DXCM DEXCOM INC S Sale2018-09-112018-09-131,460$147.41 $215.2K90,811SEC↗
DXCM DEXCOM INC S Sale2018-09-112018-09-131,200$146.15 $175.4K92,271SEC↗
DXCM DEXCOM INC S Sale2018-09-112018-09-132,100$145.23 $305.0K93,471SEC↗
DXCM DEXCOM INC S Sale2018-09-102018-09-127,149$143.76 $1.03M95,571SEC↗
ATEC Alphatec Holdings, Inc. A Award2018-07-302018-08-0121,111— $0484,081SEC↗
ATEC Alphatec Holdings, Inc. A Award2018-07-302018-08-0120,492— $0462,970SEC↗
DXCM DEXCOM INC A Award2018-03-082018-03-1238,502— $0102,258SEC↗
ATEC Alphatec Holdings, Inc. A Award2017-12-282017-12-29442,478$2.26 $1.00M442,478SEC↗
DXCM DEXCOM INC A Award2017-09-072017-09-0862,358— $063,756SEC↗
NUVA NUVASIVE INC A Award deriv2017-02-082017-02-1013,203— $013,203SEC↗
NUVA NUVASIVE INC M Exercise deriv2017-02-012017-02-033,192— $06,384SEC↗
NUVA NUVASIVE INC M Exercise deriv2017-02-012017-02-035,339— $00SEC↗
NUVA NUVASIVE INC M Exercise2017-02-012017-02-035,339— $021,078SEC↗
NUVA NUVASIVE INC F Tax w/h2017-02-012017-02-033,266$70.76 $231.1K21,004SEC↗
NUVA NUVASIVE INC M Exercise2017-02-012017-02-033,192— $024,270SEC↗
NUVA NUVASIVE INC M Exercise deriv2017-01-012017-01-045,924— $05,924SEC↗
NUVA NUVASIVE INC F Tax w/h2017-01-012017-01-043,593$67.36 $242.0K15,739SEC↗
NUVA NUVASIVE INC M Exercise2017-01-012017-01-045,924— $019,332SEC↗
NUVA NUVASIVE INC G Gift2016-08-042017-01-04558— $013,408SEC↗
NUVA NUVASIVE INC G Gift2016-08-032017-01-04319— $013,966SEC↗
NUVA NUVASIVE INC M Exercise deriv2016-07-012016-07-053,125— $00SEC↗
NUVA NUVASIVE INC F Tax w/h2016-07-012016-07-051,630$59.97 $97.8K14,285SEC↗
NUVA NUVASIVE INC M Exercise2016-07-012016-07-053,125— $015,915SEC↗
NUVA NUVASIVE INC M Exercise deriv2016-02-012016-02-031,250— $00SEC↗
NUVA NUVASIVE INC M Exercise deriv2016-02-012016-02-035,339— $05,339SEC↗
NUVA NUVASIVE INC M Exercise2016-02-012016-02-031,250— $07,427SEC↗
NUVA NUVASIVE INC M Exercise2016-02-012016-02-035,339— $012,766SEC↗
NUVA NUVASIVE INC M Exercise2016-02-012016-02-033,193— $015,959SEC↗
NUVA NUVASIVE INC F Tax w/h2016-02-012016-02-033,674$46.60 $171.2K12,285SEC↗
NUVA NUVASIVE INC A Award deriv2016-01-262016-01-2812,769— $012,769SEC↗
NUVA NUVASIVE INC M Exercise deriv2016-01-262016-02-033,193— $09,576SEC↗
NUVA NUVASIVE INC A Award2016-01-012016-01-055,924— $08,523SEC↗
NUVA NUVASIVE INC F Tax w/h2016-01-012016-01-052,346$54.11 $126.9K6,177SEC↗
NUVA NUVASIVE INC S Sale2015-12-072015-12-0715,000$51.10 $766.5K2,599SEC↗
NUVA NUVASIVE INC A Award2015-10-012015-10-055,000— $020,564SEC↗
NUVA NUVASIVE INC F Tax w/h2015-10-012015-10-052,965$48.88 $144.9K17,599SEC↗
NUVA NUVASIVE INC A Award2015-07-012015-07-063,125— $016,827SEC↗
NUVA NUVASIVE INC F Tax w/h2015-07-012015-07-061,263$47.52 $60.0K15,564SEC↗
NUVA NUVASIVE INC A Award2015-01-012015-01-055,925— $08,529SEC↗
NUVA NUVASIVE INC F Tax w/h2015-01-012015-01-051,321$47.16 $62.3K2,604SEC↗
NUVA NUVASIVE INC F Tax w/h2015-01-012015-01-052,216$47.16 $104.5K6,313SEC↗
NUVA NUVASIVE INC A Award2015-01-012015-01-053,125— $03,925SEC↗
NUVA NUVASIVE INC S Sale2014-11-192014-11-207,020$43.38 $304.5K800SEC↗
NUVA NUVASIVE INC S Sale2014-11-192014-11-20678$43.78 $29.7K800SEC↗
NUVA NUVASIVE INC M Exercise deriv2014-11-182014-11-204,438— $00SEC↗
NUVA NUVASIVE INC M Exercise deriv2014-11-182014-11-207,020— $00SEC↗
NUVA NUVASIVE INC M Exercise2014-11-182014-11-207,020$29.95 $210.2K7,820SEC↗
NUVA NUVASIVE INC M Exercise2014-11-182014-11-204,438$29.95 $132.9K5,238SEC↗
NUVA NUVASIVE INC F Tax w/h2014-11-182014-11-203,760$43.97 $165.3K1,478SEC↗
NUVA NUVASIVE INC S Sale2014-10-032015-04-085,000$36.30 $181.5K12,902SEC↗