DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership12,346,638 shares
Latest Disclosed Value $ 772,908,692
Geode Capital Management, Llc reports 12.18% increase in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 12,346,638 shares of DexCom, Inc. (MX:DXCM) valued at $772,908,692 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 11,006,183 shares of DexCom, Inc.. This represents a change in shares of 12.18% during the quarter.

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)
2026-05-15 2026-03-31 13F DEXCOM COM 252131107 12,346,638 1,340,455 12.18 772,909 6.19 0.0257
2026-02-09 2025-12-31 13F DEXCOM COM 252131107 11,006,183 42,411 0.39 727,842 -0.97 0.0449
2025-11-12 2025-09-30 13F DEXCOM COM 252131107 10,963,772 197,416 1.83 734,940 -21.49 0.0469
2025-08-08 2025-06-30 13F DEXCOM COM 252131107 10,766,356 358,617 3.45 936,100 32.11 0.0656
2025-05-13 2025-03-31 13F DEXCOM COM 252131107 10,407,739 414,041 4.14 708,590 -8.60 0.0557
2025-02-12 2024-12-31 13F DEXCOM COM 252131107 9,993,698 56,094 0.56 775,256 16.75 0.0601
2024-11-12 2024-09-30 13F DEXCOM COM 252131107 9,937,604 214,136 2.20 664,056 -39.61 0.0538
2024-08-09 2024-06-30 13F DEXCOM COM 252131107 9,723,468 545,273 5.94 1,099,655 -13.41 0.0965
2024-05-13 2024-03-31 13F DEXCOM COM 252131107 9,178,195 260,940 2.93 1,269,955 15.06 0.1174
2024-02-13 2023-12-31 13F DEXCOM COM 252131107 8,917,255 188,219 2.16 1,103,717 35.80 0.1155
2023-11-13 2023-09-30 13F DEXCOM COM 252131107 8,729,036 171,458 2.00 812,725 -25.91 0.0968
2023-08-11 2023-06-30 13F DEXCOM COM 252131107 8,557,578 274,915 3.32 1,096,967 14.25 0.1289
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 8,282,663 170,796 2.11 960,174 104,722.49 0.1247
2023-02-13 2022-12-31 13F DEXCOM COM 252131107 8,111,867 96,683 1.21 917 -99.86 0.1287
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 8,015,184 192,962 2.47 644,803 10.80 0.0978
2022-08-12 2022-06-30 13F DEXCOM COM 252131107 7,822,222 5,910,597 309.19 581,958 -40.35 0.0853
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 1,911,625 43,294 2.32 975,692 -2.51 0.1218
2022-02-11 2021-12-31 13F DEXCOM COM 252131107 1,868,331 73,778 4.11 1,000,773 2.24 0.1205
2021-11-12 2021-09-30 13F DEXCOM COM 252131107 1,794,553 46,427 2.66 978,834 31.49 0.1318
2021-08-13 2021-06-30 13F DEXCOM COM 252131107 1,748,126 252,773 16.90 744,433 38.92 0.1026
2021-05-12 2021-03-31 13F DEXCOM COM 252131107 1,495,353 522 0.03 535,854 -2.79 0.0820
2021-02-12 2020-12-31 13F DEXCOM COM 252131107 1,494,831 -14,318 -0.95 551,223 -11.22 0.0925
2020-11-13 2020-09-30 13F DEXCOM COM 252131107 1,509,149 47,388 3.24 620,883 4.96 0.1217
2020-08-13 2020-06-30 13F DEXCOM COM 252131107 1,461,761 239,457 19.59 591,542 79.86 0.1265
2020-05-14 2020-03-31 13F DEXCOM COM 252131107 1,222,304 102,430 9.15 328,893 34.37 0.0857
2020-02-20 2019-12-31 13F/A-1 DEXCOM COM 252131107 1,119,874 59,161 5.58 244,759 54.71 0.0512
2020-02-13 2019-12-31 13F DEXCOM COM 252131107 1,119,874 59,161 244,759 31,192.3885
2019-11-12 2019-09-30 13F DEXCOM COM 252131107 1,060,713 -61,302 -5.46 158,200 -5.85 0.0369
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 1,122,015 15,398 1.39 168,024 27.56 0.0407
2019-05-14 2019-03-31 13F DEXCOM COM 252131107 1,106,617 64,486 6.19 131,717 5.56 0.0341
2019-03-06 2018-12-31 13F/A-1 DEXCOM COM 252131107 1,042,131 152,781 17.18 124,776 -1.91 0.0386
2019-02-13 2018-12-31 13F DEXCOM COM 252131107 1,042,131 152,781 124,776
2018-11-13 2018-09-30 13F DEXCOM COM 252131107 889,350 22,242 2.57 127,212 54.46 0.0358
2018-08-14 2018-06-30 13F DEXCOM COM 252131107 867,108 46,154 5.62 82,357 35.28 0.0253
2018-05-15 2018-03-31 13F DEXCOM COM 252131107 820,954 20,171 2.52 60,881 32.48 0.0198
2018-02-13 2017-12-31 13F DEXCOM COM 252131107 800,783 8,444 1.07 45,956 18.60 0.0156
2017-11-14 2017-09-30 13F DEXCOM COM 252131107 792,339 14,118 1.81 38,750 -31.91 0.0143
2017-08-14 2017-06-30 13F DEXCOM COM 252131107 778,221 59,718 8.31 56,906 -6.49 0.0224
2017-06-21 2017-03-31 13F/A-1 DEXCOM COM 252131107 718,503 56,176 8.48 60,858 53.96 0.0250
2017-05-12 2017-03-31 13F DEXCOM COM 252131107 718,503 60,858
2017-02-14 2016-12-31 13F DEXCOM COM 252131107 662,327 64,697 10.83 39,529 -24.55 0.0184
2016-11-10 2016-09-30 13F DEXCOM COM 252131107 597,630 19,088 3.30 52,388 14.15 0.0264
2016-08-12 2016-06-30 13F DEXCOM COM 252131107 578,542 54,584 10.42 45,895 28.99 0.0250
2016-05-13 2016-03-31 13F DEXCOM COM 252131107 523,958 31,209 6.33 35,581 -11.83 0.0189
2016-02-12 2015-12-31 13F DEXCOM COM 252131107 492,749 28,713 6.19 40,356 1.29 0.0230
2015-11-13 2015-09-30 13F DEXCOM COM 252131107 464,036 28,283 6.49 39,842 14.32 0.0242
2015-08-14 2015-06-30 13F DEXCOM COM 252131107 435,753 -19,183 -4.22 34,851 22.89 0.0199
2015-05-14 2015-03-31 13F DEXCOM COM 252131107 454,936 40,447 9.76 28,359 24.29 0.0162
2015-02-12 2014-12-31 13F DEXCOM COM 252131107 414,489 21,918 5.58 22,816 45.34 0.0136
2014-11-14 2014-09-30 13F DEXCOM COM 252131107 392,571 -83,430 -17.53 15,698 -16.85 0.0102
2014-08-13 2014-06-30 13F DEXCOM COM 252131107 476,001 1,174 0.25 18,878 -3.87 0.0122
2014-05-14 2014-03-31 13F DEXCOM COM 252131107 474,827 127,482 36.70 19,638 59.67 0.0132
2014-02-14 2013-12-31 13F DEXCOM COM 252131107 347,345 28,595 8.97 12,299 36.69 0.0085
2013-11-14 2013-09-30 13F DEXCOM COM 252131107 318,750 20,882 7.01 8,998 34.56 0.0072
2013-08-14 2013-06-30 13F DEXCOM COM 252131107 297,868 297,868 6,687 0.0059
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.