DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership98,795 shares
Latest Disclosed Value $ 6,204,326
Robeco Institutional Asset Management B.V. reports 5.16% decrease in ownership of DXCM / DexCom, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 98,795 shares of DexCom, Inc. (MX:DXCM) valued at $6,204,326 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 104,172 shares of DexCom, Inc.. This represents a change in shares of -5.16% 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)
2026-04-21 2026-03-31 13F DEXCOM COM 252131107 98,795 -5,377 -5.16 6,204 -10.26 0.0088
2026-01-23 2025-12-31 13F DEXCOM COM 252131107 104,172 -85,745 -45.15 6,914 -45.90 0.0098
2025-10-22 2025-09-30 13F DEXCOM COM 252131107 189,917 -14,640 -7.16 12,780 -28.43 0.0185
2025-07-18 2025-06-30 13F DEXCOM COM 252131107 204,557 -31,727 -13.43 17,856 10.66 0.0289
2025-04-23 2025-03-31 13F DEXCOM COM 252131107 236,284 213,483 936.29 16,136 810.04 0.0313
2025-01-23 2024-12-31 13F DEXCOM COM 252131107 22,801 -259 -1.12 1,773 14.76 0.0034
2024-10-29 2024-09-30 13F DEXCOM COM 252131107 23,060 -1,003,493 -97.75 1,546 -98.67 0.0031
2024-07-23 2024-06-30 13F DEXCOM COM 252131107 1,026,553 858,285 510.07 116,391 398.71 0.2504
2024-04-24 2024-03-31 13F DEXCOM COM 252131107 168,268 13,667 8.84 23,339 21.65 0.0507
2024-02-14 2023-12-31 13F/A-1 DEXCOM COM 252131107 154,601 -78,611 -33.71 19,184 -11.83 0.0465
2024-02-08 2023-12-31 13F DEXCOM COM 252131107 139,086 -94,126 155 0.0290
2023-10-24 2023-09-30 13F DEXCOM COM 252131107 233,212 -72,921 -23.82 21,759 -44.69 0.0581
2023-07-24 2023-06-30 13F DEXCOM COM 252131107 306,133 7,074 2.37 39,341 13.23 0.1031
2023-05-04 2023-03-31 13F DEXCOM COM 252131107 299,059 21,863 7.89 34,745 10.69 0.0947
2023-02-07 2022-12-31 13F DEXCOM COM 252131107 277,196 -92,405 -25.00 31,390 5.44 0.0905
2022-12-01 2022-09-30 13F/A-1 DEXCOM COM 252131107 369,601 9,970 2.77 29,769 11.07 0.0962
2022-10-27 2022-09-30 13F DEXCOM COM 252131107 369,601 9,970 29,769 0.0949
2022-12-01 2022-06-30 13F/A-1 DEXCOM COM 252131107 359,631 272,606 313.25 26,803 -39.80 0.0833
2022-07-27 2022-06-30 13F DEXCOM COM 252131107 359,631 272,606 26,803 0.0821
2022-12-01 2022-03-31 13F/A-1 DEXCOM COM 252131107 87,025 4,420 5.35 44,521 0.38 0.1049
2022-04-26 2022-03-31 13F DEXCOM COM 252131107 87,025 4,420 44,521 0.1036
2022-12-01 2021-12-31 13F/A-1 DEXCOM COM 252131107 82,605 17,283 26.46 44,353 24.17 0.0944
2022-01-31 2021-12-31 13F DEXCOM COM 252131107 82,605 17,283 44,353 0.0932
2022-12-01 2021-09-30 13F/A-1 DEXCOM COM 252131107 65,322 3,731 6.06 35,721 35.82 0.0792
2021-10-20 2021-09-30 13F DEXCOM COM 252131107 65,322 3,731 35,721 0.0782
2022-12-01 2021-06-30 13F/A-1 DEXCOM COM 252131107 61,591 8,790 16.65 26,300 38.59 0.0583
2021-07-28 2021-06-30 13F DEXCOM COM 252131107 61,591 8,790 26,300 0.0575
2022-12-01 2021-03-31 13F/A-1 DEXCOM COM 252131107 52,801 -17,870 -25.29 18,977 -27.37 0.0468
2021-04-23 2021-03-31 13F DEXCOM COM 252131107 52,801 -17,870 18,977 0.0461
2022-12-01 2020-12-31 13F/A-1 DEXCOM COM 252131107 70,671 -29,449 -29.41 26,129 -36.69 0.0687
2021-01-28 2020-12-31 13F DEXCOM COM 252131107 70,671 -29,449 26,129 0.0678
2021-01-19 2020-09-30 13F/A-1 DEXCOM COM 252131107 100,120 -3,326 -3.22 41,273 -1.58 0.1276
2020-10-29 2020-09-30 13F DEXCOM COM 252131107 100,120 -3,326 41,273 127,464.4567
2021-01-19 2020-06-30 13F/A-1 DEXCOM COM 252131107 103,446 -33,104 -24.24 41,937 14.05 0.1424
2020-07-20 2020-06-30 13F DEXCOM COM 252131107 103,446 -33,104 41,937 142,299.7212
2021-01-19 2020-03-31 13F/A-1 DEXCOM COM 252131107 136,550 979 0.72 36,770 23.99 0.1475
2020-04-30 2020-03-31 13F DEXCOM COM 252131107 136,550 979 36,770 147,382.4524
2021-01-19 2019-12-31 13F/A-1 DEXCOM COM 252131107 135,571 -42,589 -23.90 29,656 11.53 0.0949
2020-02-06 2019-12-31 13F DEXCOM COM 252131107 135,571 -42,589 29,656 94,852.4355
2021-01-19 2019-09-30 13F/A-1 DEXCOM COM 252131107 178,160 -38,054 -17.60 26,591 -17.92 0.0939
2019-10-17 2019-09-30 13F DEXCOM COM 252131107 178,160 -38,054 26,591 93,744.2106
2021-01-19 2019-06-30 13F/A-1 DEXCOM COM 252131107 216,214 54,087 33.36 32,398 67.80 0.1144
2019-07-19 2019-06-30 13F DEXCOM COM 252131107 216,214 54,087 32,398 114,243.8223
2021-01-19 2019-03-31 13F/A-1 DEXCOM COM 252131107 162,127 39,300 32.00 19,307 31.78 0.0710
2019-05-02 2019-03-31 13F DEXCOM COM 252131107 162,127 39,300 19,307 70,888.4358
2021-01-19 2018-12-31 13F/A-1 DEXCOM COM 252131107 122,827 122,827 14,651 0.0658
2019-02-08 2018-12-31 13F DEXCOM COM 252131107 122,827 14,651
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.