DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership93,968 shares
Latest Disclosed Value $ 5,901,191
Guggenheim Capital Llc reports 18.63% decrease in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 93,968 shares of DexCom, Inc. (MX:DXCM) valued at $5,901,191 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 115,488 shares of DexCom, Inc.. This represents a change in shares of -18.63% 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 93,968 -21,520 -18.63 5,901 -23.00 0.0228
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 115,488 1,930 1.70 7,665 0.30 0.0549
2025-11-13 2025-09-30 13F DEXCOM COM 252131107 113,558 2,631 2.37 7,641 -21.08 0.0555
2025-08-13 2025-06-30 13F DEXCOM COM 252131107 110,927 19,710 21.61 9,683 55.43 0.0768
2025-05-14 2025-03-31 13F DEXCOM COM 252131107 91,217 -24,500 -21.17 6,229 -30.78 0.0572
2025-02-13 2024-12-31 13F DEXCOM COM 252131107 115,717 -30,236 -20.72 8,999 -8.02 0.0730
2024-11-13 2024-09-30 13F DEXCOM COM 252131107 145,953 7,018 5.05 9,785 -37.89 0.0685
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 138,935 7,988 6.10 15,752 -13.27 0.1117
2024-05-14 2024-03-31 13F DEXCOM COM 252131107 130,947 -6,068 -4.43 18,162 6.82 0.1280
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 137,015 16,995 14.16 17,002 51.84 0.1285
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 120,020 8,148 7.28 11,198 -22.11 0.0963
2023-08-11 2023-06-30 13F DEXCOM COM 252131107 111,872 -4,605 -3.95 14,377 6.24 0.1129
2023-05-11 2023-03-31 13F DEXCOM COM 252131107 116,477 11,037 10.47 13,532 13.33 0.1139
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 105,440 -28,563 -21.32 11,940 10.63 0.1049
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 134,003 -57,013 -29.85 10,793 -24.19 0.0989
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 191,016 141,121 282.84 14,236 -44.23 0.1124
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 49,895 -18,511 -27.06 25,526 -30.51 0.1535
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 68,406 9,004 15.16 36,731 13.07 0.1916
2021-11-15 2021-09-30 13F DEXCOM COM 252131107 59,402 -5,716 -8.78 32,486 16.84 0.1951
2021-08-13 2021-06-30 13F DEXCOM COM 252131107 65,118 9,996 18.13 27,805 40.36 0.1637
2021-05-13 2021-03-31 13F DEXCOM COM 252131107 55,122 -12,282 -18.22 19,810 -20.51 0.1300
2021-02-16 2020-12-31 13F DEXCOM COM 252131107 67,404 9,834 17.08 24,920 5.01 0.1563
2020-11-13 2020-09-30 13F DEXCOM COM 252131107 57,570 -20 -0.03 23,732 1.65 0.1718
2020-08-14 2020-06-30 13F DEXCOM COM 252131107 57,590 28,243 96.24 23,347 195.46 0.1806
2020-06-02 2020-03-31 13F DEXCOM COM 252131107 29,347 -15,503 -34.57 7,902 -19.46 0.0796
2020-02-20 2019-12-31 13F/A-1 DEXCOM COM 252131107 44,850 5,769 14.76 9,811 68.20 0.0737
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 44,850 5,769 9,811 58,147.8358
2020-02-20 2019-09-30 13F/A-1 DEXCOM COM 252131107 39,081 -17,309 -30.70 5,833 -30.97 0.0466
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 39,081 -17,309 5,833 42,745.9350
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 56,390 -1,537 -2.65 8,450 22.48 0.0688
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 57,927 -106 -0.18 6,899 -0.76 0.0562
2019-02-14 2018-12-31 13F DEXCOM COM 252131107 58,033 1,099 1.93 6,952 -14.64 0.0589
2018-11-14 2018-09-30 13F DEXCOM COM 252131107 56,934 3,245 6.04 8,144 59.75 0.0531
2018-08-14 2018-06-30 13F DEXCOM COM 252131107 53,689 2,788 5.48 5,098 35.05 0.0340
2018-05-15 2018-03-31 13F DEXCOM COM 252131107 50,901 10,830 27.03 3,775 64.13 0.0092
2018-02-14 2017-12-31 13F DEXCOM COM 252131107 40,071 3,086 8.34 2,300 27.14 0.0054
2017-11-14 2017-09-30 13F DEXCOM COM 252131107 36,985 13,155 55.20 1,809 3.79 0.0042
2017-08-14 2017-06-30 13F DEXCOM COM 252131107 23,830 5,977 33.48 1,743 15.28 0.0046
2017-05-15 2017-03-31 13F DEXCOM COM 252131107 17,853 2,869 19.15 1,512 69.13 0.0041
2017-02-14 2016-12-31 13F DEXCOM COM 252131107 14,984 -35 -0.23 894 -32.12 0.0026
2016-11-14 2016-09-30 13F DEXCOM COM 252131107 15,019 2,871 23.63 1,317 36.62 0.0041
2016-08-15 2016-06-30 13F DEXCOM COM 252131107 12,148 -102 -0.83 964 15.87 0.0030
2016-05-16 2016-03-31 13F DEXCOM COM 252131107 12,250 68 0.56 832 -16.63 0.0026
2016-02-16 2015-12-31 13F DEXCOM COM 252131107 12,182 -1,706 -12.28 998 -16.28 0.0029
2015-11-16 2015-09-30 13F DEXCOM COM 252131107 13,888 -9,869 -41.54 1,192 -37.26 0.0037
2015-08-14 2015-06-30 13F DEXCOM COM 252131107 23,757 -1,129 -4.54 1,900 22.50 0.0047
2015-05-18 2015-03-31 13F/A-1 DEXCOM COM 252131107 24,886 761 3.15 1,551 16.79 0.0037
2015-05-15 2015-03-31 13F DEXCOM COM 252131107 24,886 1,551
2015-02-17 2014-12-31 13F DEXCOM COM 252131107 24,125 4,739 24.45 1,328 71.35 0.0033
2014-11-14 2014-09-30 13F DEXCOM COM 252131107 19,386 136 0.71 775 1.44 0.0019
2014-08-14 2014-06-30 13F DEXCOM COM 252131107 19,250 -966 -4.78 764 -8.61 0.0019
2014-05-16 2014-03-31 13F DEXCOM COM 252131107 20,216 14,470 251.83 836 311.82 0.0024
2014-02-14 2013-12-31 13F DEXCOM COM 252131107 5,746 5,746 203 0.0006
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.