DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionLinden Thomas Advisory Services, LLC
Latest Disclosed Ownership45,466 shares
Latest Disclosed Value $ 2,855,265
Linden Thomas Advisory Services, LLC reports 64.20% increase in ownership of DXCM / DexCom, Inc.

On April 10, 2026 - Linden Thomas Advisory Services, LLC filed a 13F-HR form disclosing ownership of 45,466 shares of DexCom, Inc. (MX:DXCM) valued at $2,855,265 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 27,689 shares of DexCom, Inc.. This represents a change in shares of 64.20% 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)
2026-04-10 2026-03-31 13F DEXCOM COM 252131107 45,466 17,777 64.20 2,855 55.42 0.2751
2026-01-16 2025-12-31 13F DEXCOM COM 252131107 27,689 -1,417 -4.87 1,838 -6.18 0.1863
2025-11-06 2025-09-30 13F DEXCOM COM 252131107 29,106 1,068 3.81 1,959 -19.98 0.1982
2025-07-31 2025-06-30 13F DEXCOM COM 252131107 28,038 4,455 18.89 2,447 51.99 0.2695
2025-04-30 2025-03-31 13F DEXCOM COM 252131107 23,583 1,811 8.32 1,610 -4.90 0.2085
2025-01-21 2024-12-31 13F DEXCOM COM 252131107 21,772 473 2.22 1,693 18.64 0.2146
2024-10-17 2024-09-30 13F DEXCOM COM 252131107 21,299 1,205 6.00 1,428 -37.36 0.1951
2024-07-10 2024-06-30 13F DEXCOM COM 252131107 20,094 5,844 41.01 2,278 15.28 0.3520
2024-04-30 2024-03-31 13F DEXCOM COM 252131107 14,250 874 6.53 1,976 19.11 0.3175
2024-02-01 2023-12-31 13F DEXCOM COM 252131107 13,376 330 2.53 1,660 36.32 0.3099
2023-10-20 2023-09-30 13F DEXCOM COM 252131107 13,046 -3,643 -21.83 1,217 -43.24 0.2712
2023-07-27 2023-06-30 13F DEXCOM COM 252131107 16,689 202 1.23 2,145 11.96 0.4763
2023-04-25 2023-03-31 13F DEXCOM COM 252131107 16,487 566 3.56 1,915 6.27 0.4751
2023-02-17 2022-12-31 13F DEXCOM COM 252131107 15,921 15,921 1,803 0.5077
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.