DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionPatten & Patten Inc/tn
Latest Disclosed Ownership60,615 shares
Latest Disclosed Value $ 3,806,622
Patten & Patten Inc/tn reports 5.81% decrease in ownership of DXCM / DexCom, Inc.

On May 1, 2026 - Patten & Patten Inc/tn filed a 13F-HR form disclosing ownership of 60,615 shares of DexCom, Inc. (MX:DXCM) valued at $3,806,622 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 64,352 shares of DexCom, Inc.. This represents a change in shares of -5.81% 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)
2026-05-01 2026-03-31 13F DEXCOM COM 252131107 60,615 -3,737 -5.81 3,807 -10.89 0.2298
2026-02-03 2025-12-31 13F DEXCOM COM 252131107 64,352 -18,399 -22.23 4,271 -23.29 0.2507
2025-10-31 2025-09-30 13F DEXCOM COM 252131107 82,751 13 0.02 5,568 -22.90 0.3272
2025-07-28 2025-06-30 13F DEXCOM COM 252131107 82,738 4,780 6.13 7,222 35.68 0.4673
2025-05-07 2025-03-31 13F DEXCOM COM 252131107 77,958 3,147 4.21 5,324 -8.51 0.3564
2025-02-10 2024-12-31 13F DEXCOM COM 252131107 74,811 3,570 5.01 5,818 21.84 0.3843
2024-11-04 2024-09-30 13F DEXCOM COM 252131107 71,241 23,568 49.44 4,776 -11.66 0.3170
2024-08-13 2024-06-30 13F DEXCOM COM 252131107 47,673 -686 -1.42 5,405 -19.41 0.3779
2024-05-10 2024-03-31 13F DEXCOM COM 252131107 48,359 2,237 4.85 6,707 17.19 0.4777
2024-01-23 2023-12-31 13F DexCom COM 252131107 46,122 825 1.82 5,723 35.42 0.4699
2023-10-27 2023-09-30 13F DexCom COM 252131107 45,297 -1,262 -2.71 4,226 -29.37 0.3712
2023-07-14 2023-06-30 13F DexCom COM 252131107 46,559 -950 -2.00 5,983 8.41 0.4945
2023-04-25 2023-03-31 13F DexCom COM 252131107 47,509 -100 -0.21 5,520 110,280.00 0.4854
2023-02-01 2022-12-31 13F DexCom COM 252131107 47,609 -920 -1.90 5 -99.87 0.4894
2022-10-19 2022-09-30 13F DexCom COM 252131107 48,529 1,373 2.91 3,909 11.21 0.3707
2022-08-02 2022-06-30 13F DexCom COM 252131107 47,156 35,322 298.48 3,515 -41.94 0.3086
2022-04-25 2022-03-31 13F DexCom COM 252131107 11,834 308 2.67 6,054 -2.18 0.4418
2022-01-26 2021-12-31 13F DexCom COM 252131107 11,526 -345 -2.91 6,189 -4.67 0.4278
2021-10-22 2021-09-30 13F DexCom COM 252131107 11,871 -229 -1.89 6,492 25.64 0.4938
2021-07-13 2021-06-30 13F DexCom COM 252131107 12,100 -185 -1.51 5,167 17.03 0.3936
2021-04-23 2021-03-31 13F DexCom COM 252131107 12,285 -160 -1.29 4,415 -4.04 0.3611
2021-01-19 2020-12-31 13F DexCom COM 252131107 12,445 0 0.00 4,601 -10.31 0.4009
2020-10-08 2020-09-30 13F DexCom COM 252131107 12,445 -325 -2.55 5,130 -0.91 0.5112
2020-07-21 2020-06-30 13F DexCom COM 252131107 12,770 -1,088 -7.85 5,177 38.72 0.5663
2020-04-16 2020-03-31 13F DexCom COM 252131107 13,858 -55 -0.40 3,732 22.64 0.4921
2020-01-13 2019-12-31 13F DexCom COM 252131107 13,913 -275 -1.94 3,043 43.74 0.3059
2019-10-15 2019-09-30 13F DexCom COM 252131107 14,188 480 3.50 2,117 3.07 0.2314
2019-07-11 2019-06-30 13F DexCom COM 252131107 13,708 2,035 17.43 2,054 47.77 0.2223
2019-04-23 2019-03-31 13F DexCom COM 252131107 11,673 -1,140 -8.90 1,390 -9.45 0.1525
2019-01-17 2018-12-31 13F DexCom COM 252131107 12,813 -7,207 -36.00 1,535 -46.40 0.1883
2018-10-17 2018-09-30 13F DexCom COM 252131107 20,020 -3,505 -14.90 2,864 28.20 0.2835
2018-07-18 2018-06-30 13F DexCom COM 252131107 23,525 2,300 10.84 2,234 41.93 0.2294
2018-04-20 2018-03-31 13F DexCom COM 252131107 21,225 1,175 5.86 1,574 36.75 0.1609
2018-01-22 2017-12-31 13F DexCom COM 252131107 20,050 -29,855 -59.82 1,151 -52.87 0.1151
2017-10-12 2017-09-30 13F DexCom COM 252131107 49,905 4,035 8.80 2,442 -27.21 0.2573
2017-07-19 2017-06-30 13F DexCom COM 252131107 45,870 -550 -1.18 3,355 -14.70 0.3710
2017-04-19 2017-03-31 13F DexCom COM 252131107 46,420 3,050 7.03 3,933 51.91 0.4531
2017-01-27 2016-12-31 13F DexCom COM 252131107 43,370 -6,405 -12.87 2,589 -40.66 0.3185
2016-10-12 2016-09-30 13F DexCom COM 252131107 49,775 -650 -1.29 4,363 9.07 0.5620
2016-07-07 2016-06-30 13F DexCom COM 252131107 50,425 1,775 3.65 4,000 21.07 0.5535
2016-04-15 2016-03-31 13F DexCom COM 252131107 48,650 25,400 109.25 3,304 73.53 0.4721
2016-02-29 2015-12-31 13F DexCom COM 252131107 23,250 12,300 112.33 1,904 102.55 0.2632
2015-10-22 2015-09-30 13F DexCom COM 252131107 10,950 900 8.96 940 16.92 0.1435
2015-08-31 2015-06-30 13F DexCom COM 252131107 10,050 715 7.66 804 38.14 0.1167
2015-04-16 2015-03-31 13F DexCom COM 252131107 9,335 9,335 582 0.0837
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.