DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionWetherby Asset Management Inc
Latest Disclosed Ownership8,260 shares
Latest Disclosed Value $ 555,816
Wetherby Asset Management Inc reports 12.30% increase in ownership of DXCM / DexCom, Inc.

On November 14, 2025 - Wetherby Asset Management Inc filed a 13F-HR form disclosing ownership of 8,260 shares of DexCom, Inc. (US:DXCM) valued at $555,815 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 7,355 shares of DexCom, Inc.. This represents a change in shares of 12.30% during the quarter. The current value of the position is $601,824 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)
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 8,260 905 12.30 556 -13.55 0.0227
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 7,355 -101 -1.35 642 10.88 0.0286
2025-02-14 2024-12-31 13F DEXCOM COM 252131107 7,456 1,040 16.21 580 34.65 0.0278
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 6,416 -3,184 -33.17 430 -60.48 0.0197
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 9,600 -891 -8.49 1,088 -25.22 0.0513
2024-05-15 2024-03-31 13F DEXCOM COM 252131107 10,491 -62 -0.59 1,455 11.15 0.0693
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 10,553 646 6.52 1,310 41.67 0.0682
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 9,907 -530 -5.08 924 -31.10 0.0524
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 10,437 -86 -0.82 1,341 9.74 0.0722
2023-05-12 2023-03-31 13F DEXCOM COM 252131107 10,523 56 0.54 1,223 3.12 0.0715
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 10,467 604 6.12 1,185 49.24 0.0761
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 9,863 1,621 19.67 794 29.32 0.0560
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 8,242 5,491 199.60 614 -56.39 0.0419
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 2,751 73 2.73 1,408 -2.09 0.0807
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 2,678 37 1.40 1,438 -0.42 0.0807
2021-11-15 2021-09-30 13F DEXCOM COM 252131107 2,641 83 3.24 1,444 32.23 0.0891
2021-08-16 2021-06-30 13F DEXCOM COM 252131107 2,558 1,048 69.40 1,092 101.10 0.0666
2021-05-14 2021-03-31 13F DEXCOM COM 252131107 1,510 -1,141 -43.04 543 -44.59 0.0414
2021-02-11 2020-12-31 13F DEXCOM COM 252131107 2,651 930 54.04 980 38.03 0.0665
2020-12-16 2020-09-30 13F/A-01 DEXCOM COM 252131107 1,721 -9 -0.52 710 1.28 0.0651
2020-11-13 2020-09-30 13F DEXCOM COM 252131107 2,826 1,096 1,165 74,104.2293
2020-08-14 2020-06-30 13F DEXCOM COM 252131107 1,730 282 19.48 701 79.74 0.0664
2020-05-06 2020-03-31 13F DEXCOM COM 252131107 1,448 387 36.48 390 68.10 0.0438
2020-01-28 2019-12-31 13F DEXCOM COM 252131107 1,061 1,061 232 0.0229
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.