DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionLeonteq Securities AG
Latest Disclosed Ownership15,574 shares
Latest Disclosed Value $ 978,047
Leonteq Securities AG reports 51.28% decrease in ownership of DXCM / DexCom, Inc.

On April 27, 2026 - Leonteq Securities AG filed a 13F-HR form disclosing ownership of 15,574 shares of DexCom, Inc. (MX:DXCM) valued at $978,047 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 31,965 shares of DexCom, Inc.. This represents a change in shares of -51.28% 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)
2026-04-27 2026-03-31 13F DEXCOM COM 252131107 15,574 -16,391 -51.28 978 -53.89 0.0362
2026-02-06 2025-12-31 13F DEXCOM COM 252131107 31,965 -14,631 -31.40 2,122 -32.34 0.0647
2026-02-17 2025-09-30 13F DEXCOM COM 252131107 46,596 27,885 149.03 3,135 91.98 0.0950
2026-02-17 2025-06-30 13F DEXCOM COM 252131107 18,711 -109,181 -85.37 1,633 -81.05 0.0631
2026-02-23 2025-03-31 13F DEXCOM COM 252131107 127,892 72,478 130.79 8,616 99.95 0.4848
2026-02-23 2024-12-31 13F DEXCOM COM 252131107 55,414 -4,013 -6.75 4,310 8.18 0.2916
2026-03-04 2024-09-30 13F DEXCOM COM 252131107 59,427 47,689 406.28 3,984 199.47 0.3031
2026-03-04 2024-06-30 13F DEXCOM COM 252131107 11,738 6,113 108.68 1,331 70.51 0.0943
2026-03-11 2024-03-31 13F DEXCOM COM 252131107 5,625 -7,053 -55.63 780 -50.41 0.0581
2026-03-11 2023-12-31 13F DEXCOM COM 252131107 12,678 -30,191 -70.43 1,573 -60.67 0.0897
2026-03-11 2023-09-30 13F DEXCOM COM 252131107 42,869 33,379 351.73 4,000 228.06 0.2216
2026-03-11 2023-06-30 13F DEXCOM COM 252131107 9,490 1,175 14.13 1,220 26.19 0.0631
2026-03-11 2023-03-31 13F DEXCOM COM 252131107 8,315 -3,542 -29.87 966 -28.02 0.0441
2026-03-26 2022-12-31 13F DEXCOM COM 252131107 11,857 -4,242 -26.35 1,343 3.55 0.0498
2026-03-26 2022-09-30 13F DEXCOM COM 252131107 16,099 -34,710 -68.31 1,297 -65.77 0.0504
2026-03-26 2022-06-30 13F DEXCOM COM 252131107 50,809 46,973 1,224.53 3,787 92.97 0.1425
2026-03-26 2022-03-31 13F DEXCOM COM 252131107 3,836 276 7.75 1,962 2.67 0.0701
2026-03-26 2021-12-31 13F DEXCOM COM 252131107 3,560 879 32.79 1,912 30.35 0.0688
2026-03-26 2021-09-30 13F DEXCOM COM 252131107 2,681 -1,671 -38.40 1,466 -21.10 0.0626
2026-03-26 2021-06-30 13F DEXCOM COM 252131107 4,352 -3,190 -42.30 1,858 -31.44 0.1107
2026-03-26 2021-03-31 13F DEXCOM COM 252131107 7,542 747 10.99 2,711 7.88 0.1610
2026-03-26 2020-12-31 13F DEXCOM COM 252131107 6,795 6,795 2,512 0.1344
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.