DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionWoodstock Corp
Latest Disclosed Ownership64,034 shares
Latest Disclosed Value $ 4,021,335
Woodstock Corp reports 17.52% increase in ownership of DXCM / DexCom, Inc.

On April 8, 2026 - Woodstock Corp filed a 13F-HR form disclosing ownership of 64,034 shares of DexCom, Inc. (US:DXCM) valued at $4,021,335 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 54,488 shares of DexCom, Inc.. This represents a change in shares of 17.52% during the quarter. The current value of the position is $4,659,754 USD.

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)
2026-04-08 2026-03-31 13F DexCom COMMON STOCK 252131107 64,034 9,546 17.52 4,021 11.20 0.3579
2026-01-14 2025-12-31 13F DexCom COMMON STOCK 252131107 54,488 -4,903 -8.26 3,616 -9.51 0.3103
2025-10-07 2025-09-30 13F DexCom COMMON STOCK 252131107 59,391 -95 -0.16 3,996 -23.04 0.3463
2025-07-09 2025-06-30 13F DexCom COMMON STOCK 252131107 59,486 2,425 4.25 5,193 33.26 0.4772
2025-04-09 2025-03-31 13F DexCom COMMON STOCK 252131107 57,061 1,167 2.09 3,897 -10.35 0.3849
2025-01-15 2024-12-31 13F DexCom COMMON STOCK 252131107 55,894 -5,233 -8.56 4,347 6.08 0.4188
2024-10-11 2024-09-30 13F DexCom COMMON STOCK 252131107 61,127 27,246 80.42 4,098 6.66 0.3943
2024-07-08 2024-06-30 13F DexCom COMMON STOCK 252131107 33,881 880 2.67 3,841 -16.08 0.3906
2024-04-09 2024-03-31 13F DexCom COMMON STOCK 252131107 33,001 2,245 7.30 4,577 19.94 0.4738
2024-01-08 2023-12-31 13F DexCom COMMON STOCK 252131107 30,756 9,970 47.96 3,817 96.80 0.4419
2023-10-10 2023-09-30 13F DexCom COMMON STOCK 252131107 20,786 12,616 154.42 1,939 84.84 0.2432
2023-07-07 2023-06-30 13F DexCom COMMON STOCK 252131107 8,170 8,170 1,050 0.1239
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.