DexCom, Inc.
AT ˙ WBAG ˙ US2521311074
€ 63,20 ↑1,00 (1,61%)
2026-06-04
AKTIENPREIS
SecurityAT:DXCM / DexCom, Inc.
InstitutionAssetmark, Inc
Latest Disclosed Ownership161,368 shares
Latest Disclosed Value $ 10,133,889
Assetmark, Inc reports 12.36% increase in ownership of DXCM / DexCom, Inc.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 161,368 shares of DexCom, Inc. (AT:DXCM) valued at $8,752,600 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 143,618 shares of DexCom, Inc.. This represents a change in shares of 12.36% during the quarter. The current value of the position is $10,198,458 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)
2026-05-06 2026-03-31 13F DEXCOM COM 252131107 161,368 17,750 12.36 10,134 6.32 0.0207
2026-01-23 2025-12-31 13F DEXCOM COM 252131107 143,618 142,256 10,444.64 9,532 10,373.63 0.0194
2025-11-06 2025-09-30 13F DEXCOM COM 252131107 1,362 -123 -8.28 92 -29.46 0.0002
2025-08-04 2025-06-30 13F DEXCOM COM 252131107 1,485 546 58.15 130 101.56 0.0003
2025-05-06 2025-03-31 13F DEXCOM COM 252131107 939 -384 -29.02 64 -37.25 0.0002
2025-02-06 2024-12-31 13F DEXCOM COM 252131107 1,323 -38,408 -96.67 103 -96.17 0.0003
2024-11-01 2024-09-30 13F DEXCOM COM 252131107 39,731 -1,283 -3.13 2,664 -42.73 0.0076
2024-08-13 2024-06-30 13F DEXCOM COM 252131107 41,014 1,442 3.64 4,650 -15.27 0.0144
2024-05-07 2024-03-31 13F DEXCOM COM 252131107 39,572 881 2.28 5,489 14.31 0.0178
2024-02-09 2023-12-31 13F DEXCOM COM 252131107 38,691 -7,449 -16.14 4,801 11.55 0.0173
2023-10-27 2023-09-30 13F DEXCOM COM 252131107 46,140 3,132 7.28 4,305 -22.11 0.0172
2023-08-11 2023-06-30 13F DEXCOM INC COM COM 252131107 43,008 3,740 9.52 5,527 21.13 0.0217
2023-05-05 2023-03-31 13F DEXCOM INC COM COM 252131107 39,268 -2,733 -6.51 4,562 -4.08 0.0189
2023-02-10 2022-12-31 13F DEXCOM COM 252131107 42,001 2,350 5.93 4,756 48.95 0.0206
2022-11-01 2022-09-30 13F DEXCOM COM 252131107 39,651 -1,115 -2.74 3,193 5.10 0.0149
2022-08-03 2022-06-30 13F DEXCOM INC COM COM 252131107 40,766 31,708 350.06 3,038 -34.44 0.0136
2022-05-13 2022-03-31 13F DEXCOM INC COM COM 252131107 9,058 4,692 107.47 4,634 97.70 0.0194
2022-02-14 2021-12-31 13F DEXCOM INC COM COM 252131107 4,366 3,987 1,051.98 2,344 1,032.37 0.0096
2021-11-12 2021-09-30 13F DEXCOM INC COM COM 252131107 379 202 114.12 207 172.37 0.0009
2021-08-16 2021-06-30 13F DEXCOM INC COM COM 252131107 177 -301 -62.97 76 -55.81 0.0004
2021-05-14 2021-03-31 13F DEXCOM COM 252131107 478 -46 -8.78 172 -11.34 0.0009
2021-02-10 2020-12-31 13F DEXCOM INC COM COM 252131107 524 -134 -20.36 194 -28.41 0.0011
2020-11-13 2020-09-30 13F DEXCOM INC COM COM 252131107 658 -29 -4.22 271 -2.87 0.0017
2020-08-11 2020-06-30 13F DEXCOM INC COM COM 252131107 687 558 432.56 279 697.14 0.0020
2020-05-12 2020-03-31 13F DEXCOM INC COM COM 252131107 129 -13 -9.15 35 12.90 0.0003
2020-02-11 2019-12-31 13F DEXCOM INC COM COM 252131107 142 -156 -52.35 31 -29.55 0.0002
2019-11-13 2019-09-30 13F DEXCOM INC COM COM 252131107 298 13 4.56 44 2.33 0.0004
2019-08-14 2019-06-30 13F DEXCOM INC COM COM 252131107 285 156 120.93 43 186.67 0.0004
2019-05-14 2019-03-31 13F DEXCOM INC COM COM 252131107 129 -54 -29.51 15 -31.82 0.0001
2019-02-13 2018-12-31 13F DEXCOM INC COM COM 252131107 183 -93 -33.70 22 -43.59 0.0002
2018-11-13 2018-09-30 13F DEXCOM INC COM COM 252131107 276 -32 -10.39 39 34.48 0.0004
2018-08-01 2018-06-30 13F DEXCOM INC COM COM 252131107 308 -133 -30.16 29 -12.12 0.0003
2018-05-16 2018-03-31 13F DEXCOM INC COM COM 252131107 441 -10 -2.22 33 26.92 0.0003
2018-02-13 2017-12-31 13F DEXCOM INC COM COM 252131107 451 -200 -30.72 26 -18.75 0.0003
2017-11-08 2017-09-30 13F DEXCOM INC COM COM 252131107 651 197 43.39 32 -3.03 0.0004
2017-08-14 2017-06-30 13F DEXCOM INC COM COM 252131107 454 392 632.26 33 560.00 0.0004
2017-09-15 2017-03-31 13F/A-1 DEXCOM INC COM COM 252131107 62 -27 -30.34 5 0.00 0.0001
2017-05-08 2017-03-31 13F DEXCOM INC COM COM 252131107 62 -27 5
2017-09-15 2016-12-31 13F/A-1 DEXCOM INC COM COM 252131107 89 53 147.22 5 66.67 0.0001
2017-02-14 2016-12-31 13F DEXCOM INC COM COM 252131107 89 53 5
2017-09-14 2016-09-30 13F/A-1 DEXCOM INC COM COM 252131107 36 35 3,500.00 3 -40.00 0.0000
2016-11-04 2016-09-30 13F DEXCOM INC COM COM 252131107 36 35 3
2017-09-14 2016-06-30 13F/A-1 DEXCOM INC COM COM 252131107 1 0 0.00 0 -100.00 0.0000
2016-08-08 2016-06-30 13F DEXCOM INC COM COM 252131107 1 0 0
2017-09-14 2016-03-31 13F/A-1 DEXCOM INC COM COM 252131107 1 -28 -96.55 0 -100.00
2016-05-13 2016-03-31 13F DEXCOM INC COM COM 252131107 1 -28 0
2017-09-14 2015-12-31 13F/A-1 DEXCOM INC COM COM 252131107 29 26 866.67 2 0.0000
2016-02-12 2015-12-31 13F DEXCOM INC COM COM 252131107 29 26 2
2016-01-05 2015-09-30 13F/A-1 DEXCOM INC COM COM 252131107 3 3 0 0.0000
2015-11-10 2015-09-30 13F DEXCOM INC COM COM 252131107 3 0 0.0000
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.