DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionDAFNA Capital Management LLC
Latest Disclosed Ownership86,279 shares
Latest Disclosed Value $ 5,418,321
DAFNA Capital Management LLC reports 2.27% decrease in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - DAFNA Capital Management LLC filed a 13F-HR form disclosing ownership of 86,279 shares of DexCom, Inc. (MX:DXCM) valued at $5,418,321 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 88,279 shares of DexCom, Inc.. This represents a change in shares of -2.27% 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 86,279 -2,000 -2.27 5,418 -7.53 1.2326
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 88,279 22,727 34.67 5,859 32.86 1.3609
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 65,552 0 0.00 4,411 -22.93 1.0897
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 65,552 0 0.00 5,722 27.84 1.5796
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 65,552 0 0.00 4,477 -12.18 1.2694
2025-02-14 2024-12-31 13F DEXCOM COM 252131107 65,552 0 0.00 5,098 16.00 1.2958
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 65,552 0 0.00 4,395 -40.88 1.0381
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 65,552 0 0.00 7,432 -18.26 1.7756
2024-05-15 2024-03-31 13F DEXCOM COM 252131107 65,552 -2,000 -2.96 9,092 8.47 2.0698
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 67,552 0 0.00 8,383 33.01 2.0086
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 67,552 0 0.00 6,303 -27.40 1.9604
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 67,552 0 0.00 8,681 10.61 2.3736
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 67,552 0 0.00 7,848 2.60 2.3530
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 67,552 -5,000 -6.89 7,650 30.91 2.1545
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 72,552 0 0.00 5,843 8.06 1.5715
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 72,552 54,414 300.00 5,407 -41.73 1.4737
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 18,138 0 0.00 9,279 -4.72 2.4178
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 18,138 -3,000 -14.19 9,739 -15.75 2.4490
2021-11-15 2021-09-30 13F DEXCOM COM 252131107 21,138 0 0.00 11,560 28.07 3.0669
2021-08-16 2021-06-30 13F DEXCOM COM 252131107 21,138 0 0.00 9,026 18.81 1.8877
2021-05-17 2021-03-31 13F DEXCOM COM 252131107 21,138 0 0.00 7,597 -2.79 1.8025
2021-02-16 2020-12-31 13F DEXCOM COM 252131107 21,138 0 0.00 7,815 -10.32 2.3254
2020-11-16 2020-09-30 13F DEXCOM COM 252131107 21,138 0 0.00 8,714 1.69 2.8326
2020-08-14 2020-06-30 13F DEXCOM COM 252131107 21,138 -12,200 -36.59 8,569 -4.54 2.4730
2020-05-15 2020-03-31 13F DEXCOM COM 252131107 33,338 -3,000 -8.26 8,977 12.93 3.7462
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 36,338 0 0.00 7,949 46.58 2.7285
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 36,338 0 0.00 5,423 -0.40 2.0395
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 36,338 4,000 12.37 5,445 41.39 2.0468
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 32,338 -1,662 -4.89 3,851 -5.45 1.6613
2019-02-14 2018-12-31 13F DEXCOM COM 252131107 34,000 -3,000 -8.11 4,073 -23.03 2.0254
2018-11-14 2018-09-30 13F DEXCOM COM 252131107 37,000 -18,000 -32.73 5,292 1.30 2.1731
2018-08-10 2018-06-30 13F DEXCOM COM 252131107 55,000 -20,000 -26.67 5,224 -6.08 2.4459
2018-05-15 2018-03-31 13F DEXCOM COM 252131107 75,000 -8,000 -9.64 5,562 16.78 2.7058
2018-02-14 2017-12-31 13F DEXCOM COM 252131107 83,000 25,500 44.35 4,763 69.32 2.5651
2017-11-14 2017-09-30 13F DEXCOM COM 252131107 57,500 57,500 2,813 1.7466
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.