DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionCornerstone Planning Group LLC
Latest Disclosed Ownership148 shares
Latest Disclosed Value $ 8,804
Cornerstone Planning Group LLC reports 8.03% increase in ownership of DXCM / DexCom, Inc.

On May 6, 2026 - Cornerstone Planning Group LLC filed a 13F-HR form disclosing ownership of 148 shares of DexCom, Inc. (MX:DXCM) valued at $8,804 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 137 shares of DexCom, Inc.. This represents a change in shares of 8.03% 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)
2026-05-06 2026-03-31 13F DEXCOM INC COM Common Stock 252131107 148 11 8.03 9 -20.00 0.0012
2026-02-02 2025-12-31 13F DEXCOM INC COM Common Stock 252131107 137 69 101.47 10 66.67 0.0016
2025-11-04 2025-09-30 13F DEXCOM INC COM Common Stock 252131107 68 -93 -57.76 6 -50.00 0.0010
2025-08-11 2025-06-30 13F DEXCOM INC COM Common Stock 252131107 161 -6 -3.59 12 9.09 0.0025
2025-04-30 2025-03-31 13F DEXCOM INC COM Common Stock 252131107 167 27 19.29 11 -8.33 0.0027
2025-01-29 2024-12-31 13F DEXCOM INC COM Common Stock 252131107 140 -4 -2.78 12 20.00 0.0030
2024-11-05 2024-09-30 13F DEXCOM INC COM Common Stock 252131107 144 -66 -31.43 10 -33.33 0.0027
2024-08-13 2024-06-30 13F DEXCOM INC COM Common Stock 252131107 210 -12 -5.41 15 -46.43 0.0044
2024-05-07 2024-03-31 13F DEXCOM INC COM Common Stock 252131107 222 123 124.24 28 133.33 0.0089
2024-02-12 2023-12-31 13F DEXCOM Common Stock 252131107 99 -28 -22.05 12 9.09 0.0041
2023-11-08 2023-09-30 13F DEXCOM COMMON STOCK 252131107 127 -3 -2.31 12 -31.25 0.0045
2023-08-15 2023-06-30 13F DEXCOM INC COM COM 252131107 130 0 0.00 17 23.08 0.0066
2023-02-14 2022-12-31 13F DEXCOM INC COM COM 252131107 130 130 14 0.0058
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.