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Quentin Blackford

Track

Insider profile

Currently holds positions in DexCom Inc, AxoGen Inc and Alphatec Holdings Inc

Performance

Overall performance
3.3
Performance over holding periods
3.3
30 days 90 days 120 days
Average return 4% 8.2% 15.1%
Success rate 68% 68% 82%
Transactions
25 4% Buy
34 71% Buy
47 69% Buy
Ranking by holding-period performance

Positions

Position Company Period
Chief Financial Officer, Chief Operating Officer DexCom Inc Oct. 1, 2019 -
Director AxoGen Inc May 15, 2019 -
Independent Director Alphatec Holdings Inc Oct. 1, 2017 -
Chief Financial Officer, Executive Vice President DexCom Inc Sept. 1, 2017 - Oct. 1, 2019
Chief Financial Officer, Executive Vice President Head of Strategy and Corporate Integrity NuVasive Inc Aug. 1, 2014 - Aug. 25, 2017
Executive Vice President - Finance and Investor Relations NuVasive Inc Feb. 1, 2014 - Aug. 1, 2014
Quentin Blackford's trades of Irhythm Technologies Inc's stock


Subscribe to get access to the transaction volume chart and in-chart transaction details
• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date Company B/S Transaction type Nb. shares
Price
Value 		Number of shares Price Value Details
2026-03-03 2026-03-02
S Sale
60,460 -48.5%
452.34
US$311,726 		60,460 -48.5% 452.34 US$311,726
2026-03-03 2026-03-02
S Sale
44,974 -17.7%
158.27
US$1,745,940 		44,974 -17.7% 158.27 US$1,745,940
2026-03-03 2026-03-02
S Sale
77,172 -38.3%
236.31
US$3,339,290 		77,172 -38.3% 236.31 US$3,339,290
2026-02-26 2026-02-25
S Sale
25,540 -12.1%
135.42
US$3,458,599 		25,540 -12.1% 135.42 US$3,458,599
2025-11-04 2025-11-03
S Sale
14,059 -7.9%
182.94
US$2,571,907 		14,059 -7.9% 182.94 US$2,571,907
2025-08-06 2025-08-05
PlS Planned sale
306 -0.2%
165.00
US$50,490 		306 -0.2% 165.00 US$50,490
2025-08-06 2025-08-05
PlS Planned sale
3,174 -1.7%
163.93
US$520,301 		3,174 -1.7% 163.93 US$520,301
2025-08-06 2025-08-05
PlS Planned sale
1,514 -0.8%
163.30
US$247,230 		1,514 -0.8% 163.30 US$247,230
2025-08-06 2025-08-05
PlS Planned sale
1,600 -0.9%
161.92
US$259,076 		1,600 -0.9% 161.92 US$259,076
2025-08-06 2025-08-05
PlS Planned sale
4,905 -2.6%
160.73
US$788,361 		4,905 -2.6% 160.73 US$788,361
2025-08-06 2025-08-05
PlS Planned sale
9,775 -4.9%
160.06
US$1,564,577 		9,775 -4.9% 160.06 US$1,564,577
2025-08-06 2025-08-05
PlS Planned sale
8,726 -4.2%
158.85
US$1,386,157 		8,726 -4.2% 158.85 US$1,386,157
2025-08-05 2025-08-05
PrS Proposed sale
30,000
160.54
US$4,816,191 		30,000 160.54 US$4,816,191
2025-03-04 2025-03-03
S Sale
8,145 -3.8%
108.77
US$885,932 		8,145 -3.8% 108.77 US$885,932
2025-02-27 2025-02-26
S Sale
22,252 -9.3%
112.13
US$2,495,117 		22,252 -9.3% 112.13 US$2,495,117
2024-11-05 2024-11-04
S Sale
16,145 -9.2%
77.41
US$1,249,784 		16,145 -9.2% 77.41 US$1,249,784
2024-03-08 2024-03-07
B Purchase
20,000 +3.6%
12.83
US$256,600 		20,000 +3.6% 12.83 US$256,600
2024-03-05 2024-03-04
S Sale
4,221 -2.3%
111.14
US$469,122 		4,221 -2.3% 111.14 US$469,122
2024-03-01 2024-02-29
S Sale
24,701 -12.1%
121.96
US$3,012,534 		24,701 -12.1% 121.96 US$3,012,534
2022-11-04 2022-11-02
S Sale
12,415 -12.2%
122.50
US$1,520,838 		12,415 -12.2% 122.50 US$1,520,838
2022-11-04 2022-11-02
S Sale
284 -0.3%
118.17
US$33,560 		284 -0.3% 118.17 US$33,560
2021-03-12 2021-03-10
US DexCom Inc (DXCM)
S Sale
6,509 -12.6%
362.22
US$2,357,688 		6,509 -12.6% 362.22 US$2,357,688
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
171 -0.4%
405.33
US$69,311 		171 -0.4% 405.33 US$69,311
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
272 -0.6%
403.87
US$109,854 		272 -0.6% 403.87 US$109,854
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
2,159 -4.6%
402.72
US$869,471 		2,159 -4.6% 402.72 US$869,471
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
3,157 -6.3%
401.79
US$1,268,455 		3,157 -6.3% 401.79 US$1,268,455
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
3,017 -5.7%
399.91
US$1,206,536 		3,017 -5.7% 399.91 US$1,206,536
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
1,594 -2.9%
398.98
US$635,978 		1,594 -2.9% 398.98 US$635,978
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
1,300 -2.3%
397.76
US$517,090 		1,300 -2.3% 397.76 US$517,090
2020-09-11 2020-09-10
US DexCom Inc (DXCM)
PlS Planned sale
523 -0.9%
397.03
US$207,647 		523 -0.9% 397.03 US$207,647
2020-09-11 2020-09-09
US DexCom Inc (DXCM)
S Sale
1,579 -2.7%
398.30
US$628,919 		1,579 -2.7% 398.30 US$628,919
2020-09-11 2020-09-09
US DexCom Inc (DXCM)
S Sale
3,297 -5.4%
398.30
US$1,313,202 		3,297 -5.4% 398.30 US$1,313,202
2020-09-11 2020-09-09
US DexCom Inc (DXCM)
S Sale
8,010 -11.6%
398.30
US$3,190,399 		8,010 -11.6% 398.30 US$3,190,399
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
100 -0.1%
244.78
US$24,478 		100 -0.1% 244.78 US$24,478
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
400 -0.6%
244.01
US$97,604 		400 -0.6% 244.01 US$97,604
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
500 -0.7%
241.06
US$120,532 		500 -0.7% 241.06 US$120,532
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
1,100 -1.5%
239.63
US$263,596 		1,100 -1.5% 239.63 US$263,596
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
600 -0.8%
238.29
US$142,972 		600 -0.8% 238.29 US$142,972
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
641 -0.9%
237.10
US$151,980 		641 -0.9% 237.10 US$151,980
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
472 -0.6%
235.90
US$111,344 		472 -0.6% 235.90 US$111,344
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
300 -0.4%
234.23
US$70,270 		300 -0.4% 234.23 US$70,270
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
200 -0.3%
232.00
US$46,400 		200 -0.3% 232.00 US$46,400
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
200 -0.3%
228.86
US$45,772 		200 -0.3% 228.86 US$45,772
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
400 -0.5%
227.56
US$91,025 		400 -0.5% 227.56 US$91,025
2020-03-13 2020-03-12
US DexCom Inc (DXCM)
PlS Planned sale
457 -0.6%
223.62
US$102,196 		457 -0.6% 223.62 US$102,196