DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionVontobel Holding Ltd.
Latest Disclosed Ownership11,736 shares
Latest Disclosed Value $ 737,021
Vontobel Holding Ltd. reports 5.43% decrease in ownership of DXCM / DexCom, Inc.

On May 8, 2026 - Vontobel Holding Ltd. filed a 13F-HR form disclosing ownership of 11,736 shares of DexCom, Inc. (MX:DXCM) valued at $737,021 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,410 shares of DexCom, Inc.. This represents a change in shares of -5.43% 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)
2026-05-08 2026-03-31 13F DEXCOM COM 252131107 11,736 -674 -5.43 737 -10.45 0.0025
2026-02-13 2025-12-31 13F DEXCOM COM 252131107 12,410 -3,811 -23.49 824 -24.56 0.0026
2025-10-15 2025-09-30 13F DEXCOM COM 252131107 16,221 3,030 22.97 1,092 -5.21 0.0033
2025-07-23 2025-06-30 13F DEXCOM COM 252131107 13,191 -6,575 -33.26 1,151 -14.68 0.0037
2025-04-28 2025-03-31 13F DEXCOM COM 252131107 19,766 -15,258 -43.56 1,350 -50.46 0.0049
2025-01-30 2024-12-31 13F DEXCOM COM 252131107 35,024 -35,562 -50.38 2,724 -42.46 0.0093
2024-10-16 2024-09-30 13F DEXCOM COM 252131107 70,586 33,820 91.99 4,732 13.53 0.0153
2024-08-13 2024-06-30 13F DEXCOM COM 252131107 36,766 3,356 10.04 4,169 -10.04 0.0135
2024-05-10 2024-03-31 13F DEXCOM COM 252131107 33,410 -7,172 -17.67 4,634 -7.98 0.0370
2024-06-04 2023-12-31 13F/A-1 DEXCOM COM 252131107 40,582 -5,585 -12.10 5,036 16.90 0.0422
2024-01-30 2023-12-31 13F DEXCOM COM 252131107 65,704 -7,677 8,153 0.0409
2024-06-04 2023-09-30 13F/A-1 DEXCOM COM 252131107 46,167 -111 -0.24 4,307 -27.58 0.0398
2023-10-11 2023-09-30 13F DEXCOM COM 252131107 73,381 -2,259 6,846 0.0382
2024-06-04 2023-06-30 13F/A-1 DEXCOM COM 252131107 46,278 8,715 23.20 5,947 36.27 0.0522
2023-07-24 2023-06-30 13F DEXCOM COM 252131107 75,640 38,077 9,720 0.0516
2024-06-04 2023-03-31 13F/A-1 DEXCOM COM 252131107 37,563 -3,085 -7.59 4,364 -2.17 0.0406
2023-04-12 2023-03-31 13F DEXCOM COM 252131107 62,540 21,892 7,266 0.0413
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 40,648 -5,607 -12.12 4,462 17.49 0.0450
2022-11-04 2022-09-30 13F DEXCOM COM 252131107 46,255 -13,648 -22.78 3,797 -16.00 0.0443
2022-07-27 2022-06-30 13F DEXCOM COM 252131107 59,903 50,744 554.03 4,520 -4.94 0.0489
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 9,159 -1,259 -12.08 4,755 -15.69 0.0411
2022-02-14 2021-12-31 13F/A-1 DEXCOM COM 252131107 10,418 308 3.05 5,640 2.03 0.0469
2022-02-10 2021-12-31 13F DEXCOM COM 252131107 10,110 0 5,528 0.0210
2021-10-29 2021-09-30 13F DEXCOM COM 252131107 10,110 1,677 19.89 5,528 53.56 0.0488
2021-08-06 2021-06-30 13F DEXCOM COM 252131107 8,433 -1,389 -14.14 3,600 1.95 0.0311
2021-05-11 2021-03-31 13F DEXCOM COM 252131107 9,822 2,444 33.13 3,531 18.69 0.0262
2021-02-12 2020-12-31 13F/A-1 DEXCOM COM 252131107 7,378 7,378 2,975 0.0195
2021-02-12 2020-12-31 13F DEXCOM COM 252131107 7,378 2,975 0.0195
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.