DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionChicago Capital, LLC
Latest Disclosed Ownership737,625 shares
Latest Disclosed Value $ 46,322,856
Chicago Capital, LLC reports 35.44% increase in ownership of DXCM / DexCom, Inc.

On April 23, 2026 - Chicago Capital, LLC filed a 13F-HR form disclosing ownership of 737,625 shares of DexCom, Inc. (US:DXCM) valued at $46,322,850 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 544,602 shares of DexCom, Inc.. This represents a change in shares of 35.44% during the quarter. The current value of the position is $53,676,971 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)
2026-04-23 2026-03-31 13F DEXCOM COM 252131107 737,625 193,023 35.44 46,323 28.16 1.2490
2026-01-26 2025-12-31 13F DEXCOM COM 252131107 544,602 -344,884 -38.77 36,145 -39.61 0.8927
2025-10-22 2025-09-30 13F DEXCOM COM 252131107 889,486 3,104 0.35 59,854 -22.64 1.4729
2025-07-17 2025-06-30 13F DEXCOM COM 252131107 886,382 850 0.10 77,372 27.95 1.9094
2025-04-17 2025-03-31 13F DEXCOM COM 252131107 885,532 379,586 75.03 60,473 53.69 1.7079
2025-01-24 2024-12-31 13F DEXCOM COM 252131107 505,946 22,167 4.58 39,347 21.32 1.0433
2024-10-18 2024-09-30 13F DEXCOM COM 252131107 483,779 -193,545 -28.57 32,433 -57.77 0.9006
2024-08-06 2024-06-30 13F DEXCOM COM 252131107 677,324 1,842 0.27 76,795 -18.03 2.2831
2024-04-15 2024-03-31 13F DEXCOM COM 252131107 675,482 -1,706 -0.25 93,689 11.49 2.8550
2024-01-22 2023-12-31 13F DEXCOM COM 252131107 677,188 43,161 6.81 84,032 42.06 3.0259
2023-10-25 2023-09-30 13F DEXCOM COM 252131107 634,027 28,927 4.78 59,155 -23.93 2.7669
2023-07-20 2023-06-30 13F DEXCOM COM 252131107 605,100 22,256 3.82 77,761 14.84 3.5058
2023-04-18 2023-03-31 13F DEXCOM COM 252131107 582,844 -2,337 -0.40 67,715 2.19 3.3691
2023-01-20 2022-12-31 13F DEXCOM COM 252131107 585,181 -6,864 -1.16 66,266 38.97 3.6658
2022-10-14 2022-09-30 13F DEXCOM COM 252131107 592,045 -26,261 -4.25 47,683 3.47 2.7578
2022-07-21 2022-06-30 13F DEXCOM COM 252131107 618,306 463,370 299.07 46,082 -41.86 2.5458
2022-04-21 2022-03-31 13F DEXCOM COM 252131107 154,936 8,111 5.52 79,265 0.54 3.4116
2022-01-20 2021-12-31 13F DEXCOM COM 252131107 146,825 -3,252 -2.17 78,838 -3.94 2.9357
2021-10-28 2021-09-30 13F DEXCOM COM 252131107 150,077 -1,980 -1.30 82,071 26.40 3.1128
2021-07-22 2021-06-30 13F DEXCOM COM 252131107 152,057 -2,286 -1.48 64,928 17.05 2.5374
2021-04-13 2021-03-31 13F DEXCOM COM 252131107 154,343 4,986 3.34 55,469 0.45 2.3411
2021-01-25 2020-12-31 13F DEXCOM COM 252131107 149,357 9,027 6.43 55,220 -4.54 2.4668
2020-10-13 2020-09-30 13F DEXCOM COM 252131107 140,330 -25,793 -15.53 57,849 -14.10 2.9742
2020-07-29 2020-06-30 13F DEXCOM COM 252131107 166,123 -9,661 -5.50 67,346 42.28 3.9027
2020-04-21 2020-03-31 13F DEXCOM COM 252131107 175,784 -16,451 -8.56 47,333 12.57 3.8169
2020-01-14 2019-12-31 13F DEXCOM COM 252131107 192,235 -3,339 -1.71 42,049 44.07 2.5655
2019-10-28 2019-09-30 13F DEXCOM COMMON 252131107 195,574 901 0.46 29,187 0.06 1.9548
2019-07-11 2019-06-30 13F DEXCOM COMMON 252131107 194,673 2,357 1.23 29,170 27.35 1.8660
2019-04-23 2019-03-31 13F DEXCOM COMMON 252131107 192,316 -914 -0.47 22,905 -1.05 1.5569
2019-02-11 2018-12-31 13F DEXCOM COM 252131107 193,230 -656 -0.34 23,149 -16.53 1.8877
2018-11-02 2018-09-30 13F DEXCOM COM 252131107 193,886 -44,973 -18.83 27,733 22.24 1.9185
2018-07-19 2018-06-30 13F DEXCOM COM 252131107 238,859 82,646 52.91 22,687 95.83 1.8291
2018-05-09 2018-03-31 13F Dexcom COM 252131107 156,213 156,213 11,585 1.5459
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.