DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionDnB Asset Management AS
Latest Disclosed Ownership1,174,086 shares
Latest Disclosed Value $ 73,732,601
DnB Asset Management AS reports 7.51% decrease in ownership of DXCM / DexCom, Inc.

On May 14, 2026 - DnB Asset Management AS filed a 13F-HR form disclosing ownership of 1,174,086 shares of DexCom, Inc. (MX:DXCM) valued at $73,732,601 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 1,269,391 shares of DexCom, Inc.. This represents a change in shares of -7.51% 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)
2026-05-14 2026-03-31 13F Dexcom COM 252131107 1,174,086 -95,305 -7.51 73,733 -12.48 0.2629
2026-02-05 2025-12-31 13F Dexcom COM 252131107 1,269,391 170,847 15.55 84,249 13.97 0.2939
2025-11-12 2025-09-30 13F DexCom COM 252131107 1,098,544 803,086 271.81 73,921 186.63 0.2764
2025-08-12 2025-06-30 13F DexCom COM 252131107 295,458 5,747 1.98 25,791 30.36 0.1069
2025-05-15 2025-03-31 13F DexCom COM 252131107 289,711 43,326 17.58 19,784 3.25 0.0912
2025-02-12 2024-12-31 13F DexCom COM 252131107 246,385 23,914 10.75 19,161 28.48 0.0829
2024-11-12 2024-09-30 13F DexCom COM 252131107 222,471 78,279 54.29 14,914 -8.77 0.0673
2024-07-05 2024-06-30 13F DexCom common 252131107 144,192 44,752 45.00 16,348 18.53 0.0780
2024-04-12 2024-03-31 13F DexCom common 252131107 99,440 -10,221 -9.32 13,792 1.36 0.0719
2024-01-04 2023-12-31 13F DexCom common 252131107 109,661 -467 -0.42 13,608 32.44 0.0706
2023-10-13 2023-09-30 13F DexCom common 252131107 110,128 40,333 57.79 10,275 14.55 0.0614
2023-07-10 2023-06-30 13F/A-1 DexCom common 252131107 69,795 -298 -0.43 8,969 10.14 0.0516
2023-07-06 2023-06-30 13F DexCom common 252131107 69,795 -298 8,969 0.0528
2023-04-20 2023-03-31 13F DexCom common 252131107 70,093 3,464 5.20 8,143 7.93 0.0516
2023-01-12 2022-12-31 13F DexCom common 252131107 66,629 2,651 4.14 7,545 46.45 0.0532
2022-10-11 2022-09-30 13F DexCom common 252131107 63,978 -754 -1.16 5,153 6.80 0.0397
2022-07-08 2022-06-30 13F DexCom common 252131107 64,732 49,171 315.99 4,824 -39.40 0.0339
2022-04-08 2022-03-31 13F DexCom common 252131107 15,561 936 6.40 7,961 1.39 0.0473
2022-01-12 2021-12-31 13F DexCom common 252131107 14,625 563 4.00 7,853 2.12 0.0461
2021-10-15 2021-09-30 13F DexCom common 252131107 14,062 397 2.91 7,690 31.80 0.0499
2021-07-06 2021-06-30 13F DexCom common 252131107 13,665 -2,665 -16.32 5,835 -0.58 0.0387
2021-04-15 2021-03-31 13F DexCom common 252131107 16,330 4,736 40.85 5,869 36.91 0.0428
2021-01-19 2020-12-31 13F DexCom common 252131107 11,594 813 7.54 4,287 -3.56 0.0376
2020-10-14 2020-09-30 13F DexCom common 252131107 10,781 729 7.25 4,444 9.06 0.0472
2020-07-08 2020-06-30 13F DexCom common 252131107 10,052 10,052 4,075 0.0479
2020-04-17 2020-03-31 13F DexCom common 252131107 0 -10,187 -100.00 0 -100.00
2020-01-13 2019-12-31 13F DexCom common 252131107 10,187 10,187 2,228 0.0219
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.