DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,895,549 shares
Latest Disclosed Value $ 119,017,353
Dimensional Fund Advisors Lp reports 1.27% increase in ownership of DXCM / DexCom, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,895,549 shares of DexCom, Inc. (US:DXCM) valued at $119,040,477 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,871,705 shares of DexCom, Inc.. This represents a change in shares of 1.27% during the quarter. The current value of the position is $137,939,101 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F DEXCOM COM 252131107 1,895,549 23,844 1.27 119,017 -4.21 0.0053
2026-02-12 2025-12-31 13F DEXCOM COM 252131107 1,871,705 427,139 29.57 124,245 27.84 0.0261
2025-11-12 2025-09-30 13F DEXCOM COM 252131107 1,444,566 497,039 52.46 97,187 17.52 0.0209
2025-08-12 2025-06-30 13F DEXCOM COM 252131107 947,527 -3,219 -0.34 82,701 27.40 0.0191
2025-05-13 2025-03-31 13F DEXCOM COM 252131107 950,746 16,983 1.82 64,912 -10.62 0.0161
2025-02-13 2024-12-31 13F DEXCOM COM 252131107 933,763 -23,267 -2.43 72,625 13.18 0.0174
2024-11-07 2024-09-30 13F DEXCOM COM 252131107 957,030 37,380 4.06 64,165 -38.47 0.0156
2024-08-09 2024-06-30 13F DEXCOM COM 252131107 919,650 268,802 41.30 104,282 15.52 0.0272
2024-05-10 2024-03-31 13F DEXCOM COM 252131107 650,848 3,676 0.57 90,273 12.41 0.0244
2024-02-07 2023-12-31 13F DEXCOM COM 252131107 647,172 39,786 6.55 80,308 41.70 0.0234
2023-11-09 2023-09-30 13F DEXCOM COM 252131107 607,386 55,570 10.07 56,677 -20.08 0.0186
2023-08-09 2023-06-30 13F DEXCOM COM 252131107 551,816 16,174 3.02 70,914 13.96 0.0226
2023-05-12 2023-03-31 13F DEXCOM COM 252131107 535,642 18,350 3.55 62,226 107,186.21 0.0210
2023-02-09 2022-12-31 13F DEXCOM COM 252131107 517,292 -23,483 -4.34 59 -99.87 0.0173
2022-11-10 2022-09-30 13F DEXCOM COM 252131107 540,775 6,155 1.15 43,558 9.32 0.0167
2022-08-12 2022-06-30 13F DEXCOM COM 252131107 534,620 401,130 300.49 39,845 -41.66 0.0143
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 133,490 -14,261 -9.65 68,297 -13.91 0.0210
2022-02-09 2021-12-31 13F DEXCOM COM 252131107 147,751 -804 -0.54 79,336 -2.34 0.0240
2021-11-12 2021-09-30 13F DEXCOM COM 252131107 148,555 -13,195 -8.16 81,240 17.62 0.0262
2021-08-12 2021-06-30 13F DEXCOM COM 252131107 161,750 -2,354 -1.43 69,067 17.13 0.0219
2021-05-14 2021-03-31 13F DEXCOM COM 252131107 164,104 -836 -0.51 58,968 -3.29 0.0195
2021-03-08 2020-12-31 13F/A-2 DEXCOM COM 252131107 164,940 1,376 0.84 60,976 -9.55 0.0220
2021-02-11 2020-12-31 13F DEXCOM COM 252131107 164,940 1,376 60,976 22,021.2901
2020-11-12 2020-09-30 13F DEXCOM COM 252131107 163,564 -13,515 -7.63 67,415 -6.08 0.0286
2020-08-13 2020-06-30 13F DEXCOM COM 252131107 177,079 36,919 26.34 71,780 90.14 0.0315
2020-05-14 2020-03-31 13F DEXCOM COM 252131107 140,160 1,900 1.37 37,751 24.84 0.0197
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 138,260 1,024 0.75 30,240 47.65 0.0110
2019-11-12 2019-09-30 13F DEXCOM COM 252131107 137,236 -3,004 -2.14 20,481 -2.51 0.0080
2019-08-13 2019-06-30 13F DEXCOM COM 252131107 140,240 -387 -0.28 21,008 25.44 0.0082
2019-08-12 2019-03-31 13F/A-2 DEXCOM COM 252131107 140,627 -24,136 -14.65 16,748 -15.15 0.0067
2019-05-10 2019-03-31 13F DEXCOM COM 252131107 140,627 -24,136 16,748
2019-02-26 2018-12-31 13F/A-1 DEXCOM COM 252131107 164,763 3,468 2.15 19,738 -14.45 0.0089
2019-02-13 2018-12-31 13F DEXCOM COM 252131107 164,763 3,468 19,738
2018-11-13 2018-09-30 13F DEXCOM COM 252131107 161,295 1,758 1.10 23,073 52.28 0.0088
2018-08-10 2018-06-30 13F DEXCOM COM 252131107 159,537 11,195 7.55 15,152 37.73 0.0060
2018-05-11 2018-03-31 13F DEXCOM COM 252131107 148,342 21,271 16.74 11,001 50.84 0.0046
2018-02-12 2017-12-31 13F DEXCOM COM 252131107 127,071 -698 -0.55 7,293 16.74 0.0030
2017-11-13 2017-09-30 13F DEXCOM COM 252131107 127,769 1,095 0.86 6,247 -32.59 0.0027
2017-08-11 2017-06-30 13F DEXCOM COM 252131107 126,674 17,521 16.05 9,267 0.19 0.0043
2017-05-12 2017-03-31 13F DEXCOM COM 252131107 109,153 -1,139 -1.03 9,249 40.43 0.0044
2017-02-09 2016-12-31 13F DEXCOM COM 252131107 110,292 4,682 4.43 6,586 -28.86 0.0033
2016-11-10 2016-09-30 13F DEXCOM COM 252131107 105,610 3,652 3.58 9,258 14.47 0.0050
2016-08-09 2016-06-30 13F DEXCOM COM 252131107 101,958 286 0.28 8,088 17.18 0.0047
2016-05-13 2016-03-31 13F DEXCOM COM 252131107 101,672 -21,830 -17.68 6,902 -31.76 0.0041
2016-02-10 2015-12-31 13F DEXCOM COM 252131107 123,502 -736 -0.59 10,115 -5.16 0.0063
2015-11-13 2015-09-30 13F DEXCOM COM 252131107 124,238 894 0.72 10,665 8.11 0.0070
2015-08-14 2015-06-30 13F DEXCOM COM 252131107 123,344 15,522 14.40 9,865 46.78 0.0060
2015-05-14 2015-03-31 13F DEXCOM COM 252131107 107,822 11,360 11.78 6,721 26.57 0.0042
2015-02-06 2014-12-31 13F DEXCOM COM 252131107 96,462 73,718 324.12 5,310 483.52 0.0035
2014-11-13 2014-09-30 13F DEXCOM COM 252131107 22,744 21,294 1,468.55 910 1,468.97 0.0006
2014-08-08 2014-06-30 13F DEXCOM COM 252131107 1,450 -14,901 -91.13 58 -91.42 0.0000
2014-05-14 2014-03-31 13F DEXCOM COM 252131107 16,351 15,201 1,321.83 676 1,548.78 0.0005
2014-02-12 2013-12-31 13F DEXCOM COM 252131107 1,150 0 0.00 41 28.13 0.0000
2013-11-13 2013-09-30 13F DEXCOM COM 252131107 1,150 0 0.00 32 23.08 0.0000
2013-08-15 2013-06-30 13F DEXCOM COM 252131107 1,150 1,150 26 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.