DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership8,861 shares
Latest Disclosed Value $ 556,471
Advisors Asset Management, Inc. reports 2.53% decrease in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 8,861 shares of DexCom, Inc. (MX:DXCM) valued at $556,471 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 9,091 shares of DexCom, Inc.. This represents a change in shares of -2.53% 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 8,861 -230 -2.53 556 -7.79 0.0092
2026-02-12 2025-12-31 13F DEXCOM COM 252131107 9,091 -2,721 -23.04 603 -24.06 0.0101
2025-11-06 2025-09-30 13F DEXCOM COM 252131107 11,812 397 3.48 795 -20.28 0.0135
2025-08-12 2025-06-30 13F DEXCOM COM 252131107 11,415 -1,259 -9.93 996 15.14 0.0178
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 12,674 726 6.08 866 -6.89 0.0163
2025-02-10 2024-12-31 13F DEXCOM COM 252131107 11,948 3,157 35.91 929 57.72 0.0171
2024-11-08 2024-09-30 13F DEXCOM COM 252131107 8,791 -6,096 -40.95 589 -65.09 0.0108
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 14,887 87 0.59 1,688 -17.79 0.0329
2024-05-14 2024-03-31 13F DEXCOM COM 252131107 14,800 1,809 13.93 2,053 27.30 0.0395
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 12,991 -3,300 -20.26 1,612 6.12 0.0329
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 16,291 1,588 10.80 1,520 -19.59 0.0328
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 14,703 6,914 88.77 1,889 108.96 0.0386
2023-05-12 2023-03-31 13F DEXCOM COM 252131107 7,789 -130 -1.64 905 0.89 0.0184
2023-02-13 2022-12-31 13F DEXCOM COM 252131107 7,919 -9,709 -55.08 897 -36.90 0.0185
2022-11-08 2022-09-30 13F DEXCOM COM 252131107 17,628 -1,094 -5.84 1,420 1.79 0.0299
2022-08-08 2022-06-30 13F DEXCOM COM 252131107 18,722 11,285 151.74 1,395 -63.34 0.0265
2022-05-17 2022-03-31 13F DEXCOM COM 252131107 7,437 -1,099 -12.87 3,805 -16.98 0.0586
2022-02-15 2021-12-31 13F DEXCOM COM 252131107 8,536 1,203 16.41 4,583 14.29 0.0654
2021-11-12 2021-09-30 13F DEXCOM COM 252131107 7,333 -1,034 -12.36 4,010 12.23 0.0610
2021-07-30 2021-06-30 13F DEXCOM COM 252131107 8,367 -1,070 -11.34 3,573 5.34 0.0527
2021-05-07 2021-03-31 13F DEXCOM COM 252131107 9,437 -60 -0.63 3,392 -3.39 0.0527
2021-02-12 2020-12-31 13F DEXCOM COM 252131107 9,497 -14 -0.15 3,511 -10.46 0.0581
2020-11-16 2020-09-30 13F DEXCOM COM 252131107 9,511 1,044 12.33 3,921 14.21 0.0725
2020-08-12 2020-06-30 13F DEXCOM COM 252131107 8,467 292 3.57 3,433 55.97 0.0668
2020-05-15 2020-03-31 13F DEXCOM COM 252131107 8,175 764 10.31 2,201 35.78 0.0524
2020-05-20 2019-12-31 13F/A-1 DEXCOM COM 252131107 7,411 -25 -0.34 1,621 46.04 0.0284
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 7,411 -25 1,621 14,347.3826
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 7,436 1,119 17.71 1,110 17.21 0.0204
2019-11-14 2019-06-30 13F/A-1 DEXCOM COM 252131107 6,317 159 2.58 947 29.20 0.0171
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 6,317 159 947
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 6,158 401 6.97 733 6.23 0.0130
2019-02-06 2018-12-31 13F/A-1 DEXCOM COM 252131107 5,757 5,081 751.63 690 611.34 0.0139
2019-01-31 2018-12-31 13F DEXCOM COM 252131107 5,757 5,081 690
2018-11-15 2018-09-30 13F DEXCOM COM 252131107 676 169 33.33 97 102.08 0.0016
2018-08-22 2018-06-30 13F/A-1 DEXCOM COM 252131107 507 -1,193 -70.18 48 -49.47 0.0008
2018-08-15 2018-06-30 13F DEXCOM COM 252131107 1,677 -23 48
2018-05-15 2018-03-31 13F DEXCOM COM 252131107 1,700 -721 -29.78 95 -31.65 0.0016
2018-02-13 2017-12-31 13F DEXCOM COM 252131107 2,421 -251 -9.39 139 6.11 0.0023
2017-11-07 2017-09-30 13F DEXCOM COM 252131107 2,672 -1,091 -28.99 131 -52.36 0.0022
2017-08-02 2017-06-30 13F DEXCOM COM 252131107 3,763 -4,416 -53.99 275 -60.32 0.0046
2017-05-02 2017-03-31 13F DEXCOM COM 252131107 8,179 -576 -6.58 693 -9.65 0.0116
2016-10-31 2016-09-30 13F DEXCOM COM 252131107 8,755 5,676 184.35 767 214.34 0.0126
2016-08-08 2016-06-30 13F DEXCOM COM 252131107 3,079 -6,018 -66.15 244 -60.52 0.0040
2016-05-16 2016-03-31 13F DEXCOM COM 252131107 9,097 96 1.07 618 -16.15 0.0103
2016-02-10 2015-12-31 13F DEXCOM COM 252131107 9,001 2,256 33.45 737 27.29 0.0117
2015-11-16 2015-09-30 13F DEXCOM COM 252131107 6,745 6,745 579 0.0092
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.