DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionJ. Stern & Co. LLP
Latest Disclosed Ownership26,664 shares
Latest Disclosed Value $ 1,674,499
J. Stern & Co. LLP reports 98.34% decrease in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - J. Stern & Co. LLP filed a 13F-HR form disclosing ownership of 26,664 shares of DexCom, Inc. (MX:DXCM) valued at $1,674,499 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 24, 2026 disclosing 1,601,973 shares of DexCom, Inc.. This represents a change in shares of -98.34% 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)
2026-05-15 2026-03-31 13F DEXCOM COM 252131107 26,664 -1,575,309 -98.34 1,674 4.56 0.1623
2026-02-24 2025-12-31 13F/A-1 Dexcom COM 252131107 1,601,973 1,529,641 2,114.75 1,602 -67.10 0.1365
2026-02-17 2025-12-31 13F Dexcom COM 252131107 1,601,973 1,529,641 1,602 0.1365
2025-11-14 2025-09-30 13F Dexcom COM 252131107 72,332 32,284 80.61 4,867 43.82 0.3683
2025-08-14 2025-06-30 13F Dexcom COM 252131107 40,048 2,372 6.30 3,384 31.57 0.2891
2025-05-14 2025-03-31 13F Dexcom COM 252131107 37,676 10,051 36.38 2,573 19.74 0.2466
2025-02-14 2024-12-31 13F Dexcom Common 252131107 27,625 4,187 17.86 2,148 36.73 0.2024
2024-11-13 2024-09-30 13F Dexcom Common 252131107 23,438 12,557 115.40 1,571 27.41 0.1675
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 10,881 8,394 337.52 1,234 258.43 0.1469
2024-05-15 2024-03-31 13F Dexcom common 252131107 2,487 1,145 85.32 345 112.35 0.0436
2024-02-22 2023-12-31 13F/A-1 DEXCOM COM 252131107 1,342 1,342 163 0.0297
2024-02-13 2023-12-31 13F Dexcom common 252131107 1,342 1,342 163 0.0297
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.