DEXCOM INC

Ticker: DXCM CUSIP: 252131107 Class: EQTY

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q4 2025

Shares 375,331 Value ($000) $24,911 Avg Close $64.65 Range $54.11 - $72.08

Q3 2025

Shares 688,694 Value ($000) $46,342 Avg Close $79.14 Range $65.18 - $89.98

Q2 2025

Shares 932,371 Value ($000) $81,387 Avg Close $78.38 Range $57.52 - $88.32

Q1 2025

Shares 968,278 Value ($000) $66,124 Avg Close $81.60 Range $66.25 - $93.25

Q4 2024

Shares 693,214 Value ($000) $53,911 Avg Close $74.04 Range $64.76 - $82.26

Q3 2024

Shares 735,926 Value ($000) $49,336 Avg Close $82.12 Range $62.34 - $117.19

Q2 2024

Shares 743,037 Value ($000) $84,246 Avg Close $126.43 Range $108.71 - $141.99

Q1 2024

Shares 774,985 Value ($000) $107,490 Avg Close $125.70 Range $113.05 - $142.00

Q4 2023

Shares 793,272 Value ($000) $98,437 Avg Close $102.16 Range $74.75 - $126.37

Q3 2023

Shares 451,197 Value ($000) $42,097 Avg Close $112.73 Range $85.31 - $139.55

Q2 2023

Shares 705,970 Value ($000) $90,724 Avg Close $120.95 Range $110.90 - $134.14

Q1 2023

Shares 729,652 Value ($000) $84,771 Avg Close $111.94 Range $102.50 - $123.14

Q4 2022

Shares 695,060 Value ($000) $78,709 Avg Close $109.79 Range $81.06 - $125.55

Q3 2022

Shares 649,950 Value ($000) $52,347 Avg Close $84.70 Range $73.93 - $94.60

Q2 2022

Shares 675,593 Value ($000) $50,352 Avg Close $91.26 Range $66.89 - $134.76

Q1 2022

Shares 186,844 Value ($000) $95,589 Avg Close $109.39 Range $91.43 - $133.20

Q4 2021

Shares 214,182 Value ($000) $115,005 Avg Close $143.69 Range $127.62 - $164.86

Q3 2021

Shares 261,544 Value ($000) $143,028 Avg Close $126.11 Range $105.19 - $144.75

Q2 2021

Shares 195,051 Value ($000) $83,287 Avg Close $96.03 Range $79.61 - $109.91

Q1 2021

Shares 166,355 Value ($000) $59,786 Avg Close $93.87 Range $84.28 - $105.85

Q4 2020

Shares 229,754 Value ($000) $84,945 Avg Close $89.29 Range $76.41 - $105.00

Q3 2020

Shares 218,134 Value ($000) $89,921 Avg Close $104.48 Range $93.91 - $114.06

Q2 2020

Shares 292,903 Value ($000) $118,743 Avg Close $89.45 Range $62.50 - $107.15

Q1 2020

Shares 413,281 Value ($000) $111,284 Avg Close $62.23 Range $45.52 - $76.68

Q4 2019

Shares 497,462 Value ($000) $108,815 Avg Close $47.43 Range $36.31 - $58.00

Q3 2019

Shares 329,814 Value ($000) $49,221 Avg Close $38.85 Range $34.57 - $44.61

Q2 2019

Shares 395,878 Value ($000) $59,318 Avg Close $31.43 Range $26.86 - $39.38

Q1 2019

Shares 314,733 Value ($000) $37,485 Avg Close $35.14 Range $27.58 - $39.04

Q4 2018

Shares 365,909 Value ($000) $43,836 Avg Close $31.72 Range $26.26 - $38.03

Q3 2018

Shares 426,814 Value ($000) $61,051 Avg Close $31.00 Range $23.08 - $37.14

Q2 2018

Shares 662,576 Value ($000) $62,931 Avg Close $21.20 Range $17.38 - $25.52

Q1 2018

Shares 850,894 Value ($000) $63,102 Avg Close $14.79 Range $12.76 - $18.82

Q4 2017

Shares 688,157 Value ($000) $39,493 Avg Close $13.00 Range $10.94 - $15.59

Q3 2017

Shares 848,670 Value ($000) $41,521 Avg Close $17.68 Range $10.65 - $19.73

Q2 2017

Shares 458,723 Value ($000) $33,556 Avg Close $18.47 Range $16.54 - $21.33

Q1 2017

Shares 617,773 Value ($000) $52,344 Avg Close $19.52 Range $14.42 - $22.20

Q4 2016

Shares 832,686 Value ($000) $49,711 Avg Close $17.71 Range $14.84 - $21.95

Q3 2016

Shares 1,023,035 Value ($000) $89,679 Avg Close $22.24 Range $19.05 - $24.09

Q2 2016

Shares 1,083,158 Value ($000) $85,927 Avg Close $17.03 Range $15.02 - $20.31

Q1 2016

Shares 1,189,225 Value ($000) $80,760 Avg Close $16.70 Range $11.98 - $20.97

Q4 2015

Shares 1,175,369 Value ($000) $96,263 Avg Close $20.81 Range $17.57 - $22.36

Q3 2015

Shares 1,510,572 Value ($000) $129,698 Avg Close $22.31 Range $19.11 - $25.82

Q2 2015

Shares 2,407,516 Value ($000) $192,553 Avg Close $17.56 Range $15.20 - $20.14

Q1 2015

Shares 1,357,689 Value ($000) $84,638 Avg Close $15.11 Range $13.32 - $16.16

Q4 2014

Shares 1,877,344 Value ($000) $103,348 Avg Close $12.24 Range $9.69 - $14.58

Q3 2014

Shares 2,166,470 Value ($000) $86,637 Avg Close $10.22 Range $8.67 - $11.59

Q2 2014

Shares 2,107,205 Value ($000) $83,572 Avg Close $8.86 Range $7.02 - $10.62

Q1 2014

Shares 2,248,379 Value ($000) $92,993 Avg Close $10.34 Range $8.53 - $12.46

Q4 2013

Shares 3,783,053 Value ($000) $133,958 Avg Close $7.91 Range $6.67 - $8.99

Q3 2013

Shares 3,860,763 Value ($000) $108,951 Avg Close $6.33 Range $5.44 - $7.31

Q2 2013

Shares 3,353,013 Value ($000) $75,275 Avg Close $4.79 Range $3.76 - $5.74

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	375,331	$24,911	$64.65	$54.11 - $72.08
Q3 2025	688,694	$46,342	$79.14	$65.18 - $89.98
Q2 2025	932,371	$81,387	$78.38	$57.52 - $88.32
Q1 2025	968,278	$66,124	$81.60	$66.25 - $93.25
Q4 2024	693,214	$53,911	$74.04	$64.76 - $82.26
Q3 2024	735,926	$49,336	$82.12	$62.34 - $117.19
Q2 2024	743,037	$84,246	$126.43	$108.71 - $141.99
Q1 2024	774,985	$107,490	$125.70	$113.05 - $142.00
Q4 2023	793,272	$98,437	$102.16	$74.75 - $126.37
Q3 2023	451,197	$42,097	$112.73	$85.31 - $139.55
Q2 2023	705,970	$90,724	$120.95	$110.90 - $134.14
Q1 2023	729,652	$84,771	$111.94	$102.50 - $123.14
Q4 2022	695,060	$78,709	$109.79	$81.06 - $125.55
Q3 2022	649,950	$52,347	$84.70	$73.93 - $94.60
Q2 2022	675,593	$50,352	$91.26	$66.89 - $134.76
Q1 2022	186,844	$95,589	$109.39	$91.43 - $133.20
Q4 2021	214,182	$115,005	$143.69	$127.62 - $164.86
Q3 2021	261,544	$143,028	$126.11	$105.19 - $144.75
Q2 2021	195,051	$83,287	$96.03	$79.61 - $109.91
Q1 2021	166,355	$59,786	$93.87	$84.28 - $105.85
Q4 2020	229,754	$84,945	$89.29	$76.41 - $105.00
Q3 2020	218,134	$89,921	$104.48	$93.91 - $114.06
Q2 2020	292,903	$118,743	$89.45	$62.50 - $107.15
Q1 2020	413,281	$111,284	$62.23	$45.52 - $76.68
Q4 2019	497,462	$108,815	$47.43	$36.31 - $58.00
Q3 2019	329,814	$49,221	$38.85	$34.57 - $44.61
Q2 2019	395,878	$59,318	$31.43	$26.86 - $39.38
Q1 2019	314,733	$37,485	$35.14	$27.58 - $39.04
Q4 2018	365,909	$43,836	$31.72	$26.26 - $38.03
Q3 2018	426,814	$61,051	$31.00	$23.08 - $37.14
Q2 2018	662,576	$62,931	$21.20	$17.38 - $25.52
Q1 2018	850,894	$63,102	$14.79	$12.76 - $18.82
Q4 2017	688,157	$39,493	$13.00	$10.94 - $15.59
Q3 2017	848,670	$41,521	$17.68	$10.65 - $19.73
Q2 2017	458,723	$33,556	$18.47	$16.54 - $21.33
Q1 2017	617,773	$52,344	$19.52	$14.42 - $22.20
Q4 2016	832,686	$49,711	$17.71	$14.84 - $21.95
Q3 2016	1,023,035	$89,679	$22.24	$19.05 - $24.09
Q2 2016	1,083,158	$85,927	$17.03	$15.02 - $20.31
Q1 2016	1,189,225	$80,760	$16.70	$11.98 - $20.97
Q4 2015	1,175,369	$96,263	$20.81	$17.57 - $22.36
Q3 2015	1,510,572	$129,698	$22.31	$19.11 - $25.82
Q2 2015	2,407,516	$192,553	$17.56	$15.20 - $20.14
Q1 2015	1,357,689	$84,638	$15.11	$13.32 - $16.16
Q4 2014	1,877,344	$103,348	$12.24	$9.69 - $14.58
Q3 2014	2,166,470	$86,637	$10.22	$8.67 - $11.59
Q2 2014	2,107,205	$83,572	$8.86	$7.02 - $10.62
Q1 2014	2,248,379	$92,993	$10.34	$8.53 - $12.46
Q4 2013	3,783,053	$133,958	$7.91	$6.67 - $8.99
Q3 2013	3,860,763	$108,951	$6.33	$5.44 - $7.31
Q2 2013	3,353,013	$75,275	$4.79	$3.76 - $5.74