DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionFisher Asset Management, LLC
Latest Disclosed Ownership188,645 shares
Latest Disclosed Value $ 11,846,931
Fisher Asset Management, LLC reports 18.13% decrease in ownership of DXCM / DexCom, Inc.

On May 5, 2026 - Fisher Asset Management, LLC filed a 13F-HR form disclosing ownership of 188,645 shares of DexCom, Inc. (MX:DXCM) valued at $11,846,931 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 230,413 shares of DexCom, Inc.. This represents a change in shares of -18.13% 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)
2026-05-05 2026-03-31 13F DEXCOM COM 252131107 188,645 -41,768 -18.13 11,847 -22.53 0.0040
2026-02-09 2025-12-31 13F DEXCOM COM 252131107 230,413 -33,151 -12.58 15,293 -13.78 0.0052
2025-11-12 2025-09-30 13F DEXCOM COM 252131107 263,564 -23,056 -8.04 17,735 -29.11 0.0064
2025-08-13 2025-06-30 13F DEXCOM COM 252131107 286,620 -113,251 -28.32 25,019 -8.38 0.0099
2025-05-14 2025-03-31 13F DEXCOM COM 252131107 399,871 -361,964 -47.51 27,307 -53.91 0.0118
2025-02-05 2024-12-31 13F DEXCOM COM 252131107 761,835 -94,289 -11.01 59,248 3.23 0.0236
2024-11-12 2024-09-30 13F DEXCOM COM 252131107 856,124 82,250 10.63 57,395 -34.59 0.0235
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 773,874 -6,891 -0.88 87,742 -18.98 0.0382
2024-05-09 2024-03-31 13F DEXCOM COM 252131107 780,765 -209,780 -21.18 108,292 -11.90 0.0506
2024-03-05 2023-12-31 13F/A-1 DEXCOM COM 252131107 990,545 -21,077 -2.08 122,917 30.23 0.0650
2024-02-06 2023-12-31 13F DEXCOM COM 252131107 991,519 -20,103 123,038 0.0606
2023-11-13 2023-09-30 13F DEXCOM COM 252131107 1,011,622 -260,288 -20.46 94,384 -42.26 0.0535
2023-12-12 2023-06-30 13F/A-1 DEXCOM COM 252131107 1,271,910 -44,133 -3.35 163,453 6.90 0.0904
2023-08-08 2023-06-30 13F DEXCOM COM 252131107 1,272,589 -43,454 164 0.0904
2023-12-12 2023-03-31 13F/A-1 DEXCOM COM 252131107 1,316,043 -63,625 -4.61 152,898 97,910.90 0.0929
2023-05-01 2023-03-31 13F DEXCOM COM 252131107 1,326,902 -52,766 154 0.0934
2023-02-03 2022-12-31 13F DEXCOM COM 252131107 1,379,668 -53,672 -3.74 156 -99.86 0.1056
2022-11-08 2022-09-30 13F DEXCOM COM 252131107 1,433,340 1,074,492 299.43 115,441 331.64 0.0865
2022-08-09 2022-06-30 13F DEXCOM COM 252131107 358,848 264,944 282.14 26,745 -44.33 0.0189
2022-05-05 2022-03-31 13F DEXCOM COM 252131107 93,904 8,047 9.37 48,042 4.21 0.0283
2022-02-02 2021-12-31 13F DEXCOM COM 252131107 85,857 31,774 58.75 46,101 55.87 0.0258
2021-10-26 2021-09-30 13F DEXCOM COM 252131107 54,083 -123 -0.23 29,576 27.78 0.0184
2021-07-27 2021-06-30 13F DEXCOM COM 252131107 54,206 4,046 8.07 23,146 28.40 0.0145
2021-04-27 2021-03-31 13F DEXCOM COM 252131107 50,160 1,248 2.55 18,027 -0.32 0.0127
2021-01-29 2020-12-31 13F DEXCOM COM 252131107 48,912 27,034 123.57 18,084 100.51 0.0135
2020-11-12 2020-09-30 13F/A-1 DEXCOM COM 252131107 21,878 324 1.50 9,019 3.22 0.0079
2020-11-10 2020-09-30 13F DEXCOM COM 252131107 21,878 324 9,019 7,658.6865
2020-08-07 2020-06-30 13F DEXCOM COM 252131107 21,554 21,554 8,738 0.0085
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.