DEXCOM INC

Ticker: DXCM CUSIP: 252131107 Class: EQTY

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

Note: Option positions (PUT/CALL) are excluded.

Q2 2025

Shares 28,566 Value ($000) $2 Avg Close $78.38 Range $57.52 - $88.32

Q1 2025

Shares 33,813 Value ($000) $2 Avg Close $81.60 Range $66.25 - $93.25

Q4 2024

Shares 56,687 Value ($000) $4 Avg Close $74.04 Range $64.76 - $82.26

Q3 2024

Shares 26,729 Value ($000) $2 Avg Close $82.12 Range $62.34 - $117.19

Q2 2024

Shares 21,749 Value ($000) $2 Avg Close $126.43 Range $108.71 - $141.99

Q1 2024

Shares 15,327 Value ($000) $2 Avg Close $125.70 Range $113.05 - $142.00

Q3 2021

Shares 5,733 Value ($000) $2,447 Avg Close $126.11 Range $105.19 - $144.75

Q2 2021

Shares 6,483 Value ($000) $2,768 Avg Close $96.03 Range $79.61 - $109.91

Q4 2020

Shares 11,222 Value ($000) $4,148 Avg Close $89.29 Range $76.41 - $105.00

Q3 2020

Shares 8,503 Value ($000) $3,505 Avg Close $104.48 Range $93.91 - $114.06

Q2 2020

Shares 5,144 Value ($000) $2,085 Avg Close $89.45 Range $62.50 - $107.15

Q1 2020

Shares 9,728 Value ($000) $2,619 Avg Close $62.23 Range $45.52 - $76.68

Q4 2019

Shares 1,100 Value ($000) $240 Avg Close $47.43 Range $36.31 - $58.00

Q3 2019

Shares 4,928 Value ($000) $735 Avg Close $38.85 Range $34.57 - $44.61

Q1 2019

Shares 11,387 Value ($000) $1,356 Avg Close $35.14 Range $27.58 - $39.04

Q4 2018

Shares 4,336 Value ($000) $519 Avg Close $31.72 Range $26.26 - $38.03

Q3 2018

Shares 6,111 Value ($000) $874 Avg Close $31.00 Range $23.08 - $37.14

Q1 2018

Shares 16,290 Value ($000) $1,208 Avg Close $14.79 Range $12.76 - $18.82

Q2 2017

Shares 5,435 Value ($000) $397 Avg Close $18.47 Range $16.54 - $21.33

Q1 2017

Shares 4,531 Value ($000) $383 Avg Close $19.52 Range $14.42 - $22.20

Q4 2016

Shares 2,784 Value ($000) $166 Avg Close $17.71 Range $14.84 - $21.95

Q2 2016

Shares 20,639 Value ($000) $1,637 Avg Close $17.03 Range $15.02 - $20.31

Q1 2016

Shares 599 Value ($000) $40 Avg Close $16.70 Range $11.98 - $20.97

Q4 2015

Shares 2,705 Value ($000) $221 Avg Close $20.81 Range $17.57 - $22.36

Q3 2015

Shares 5,838 Value ($000) $501 Avg Close $22.31 Range $19.11 - $25.82

Q1 2015

Shares 3,162 Value ($000) $197 Avg Close $15.11 Range $13.32 - $16.16

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	28,566	$2	$78.38	$57.52 - $88.32
Q1 2025	33,813	$2	$81.60	$66.25 - $93.25
Q4 2024	56,687	$4	$74.04	$64.76 - $82.26
Q3 2024	26,729	$2	$82.12	$62.34 - $117.19
Q2 2024	21,749	$2	$126.43	$108.71 - $141.99
Q1 2024	15,327	$2	$125.70	$113.05 - $142.00
Q3 2021	5,733	$2,447	$126.11	$105.19 - $144.75
Q2 2021	6,483	$2,768	$96.03	$79.61 - $109.91
Q4 2020	11,222	$4,148	$89.29	$76.41 - $105.00
Q3 2020	8,503	$3,505	$104.48	$93.91 - $114.06
Q2 2020	5,144	$2,085	$89.45	$62.50 - $107.15
Q1 2020	9,728	$2,619	$62.23	$45.52 - $76.68
Q4 2019	1,100	$240	$47.43	$36.31 - $58.00
Q3 2019	4,928	$735	$38.85	$34.57 - $44.61
Q1 2019	11,387	$1,356	$35.14	$27.58 - $39.04
Q4 2018	4,336	$519	$31.72	$26.26 - $38.03
Q3 2018	6,111	$874	$31.00	$23.08 - $37.14
Q1 2018	16,290	$1,208	$14.79	$12.76 - $18.82
Q2 2017	5,435	$397	$18.47	$16.54 - $21.33
Q1 2017	4,531	$383	$19.52	$14.42 - $22.20
Q4 2016	2,784	$166	$17.71	$14.84 - $21.95
Q2 2016	20,639	$1,637	$17.03	$15.02 - $20.31
Q1 2016	599	$40	$16.70	$11.98 - $20.97
Q4 2015	2,705	$221	$20.81	$17.57 - $22.36
Q3 2015	5,838	$501	$22.31	$19.11 - $25.82
Q1 2015	3,162	$197	$15.11	$13.32 - $16.16