DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionSignaturefd, Llc
Latest Disclosed Ownership4,681 shares
Latest Disclosed Value $ 293,991
Signaturefd, Llc reports 12.71% increase in ownership of DXCM / DexCom, Inc.

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 4,681 shares of DexCom, Inc. (US:DXCM) valued at $293,967 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 4,153 shares of DexCom, Inc.. This represents a change in shares of 12.71% during the quarter. The current value of the position is $341,058 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)
2026-04-07 2026-03-31 13F DEXCOM COM 252131107 4,681 528 12.71 294 6.55 0.0045
2026-01-20 2025-12-31 13F DEXCOM COM 252131107 4,153 -1,196 -22.36 276 -23.40 0.0042
2025-10-21 2025-09-30 13F DEXCOM COM 252131107 5,349 -485 -8.31 360 -29.47 0.0057
2025-07-16 2025-06-30 13F DEXCOM COM 252131107 5,834 266 4.78 509 33.95 0.0087
2025-05-02 2025-03-31 13F DEXCOM COM 252131107 5,568 -993 -15.13 380 -25.49 0.0072
2025-02-10 2024-12-31 13F DEXCOM COM 252131107 6,561 1,526 30.31 510 51.34 0.0097
2024-10-21 2024-09-30 13F DEXCOM COM 252131107 5,035 -4,606 -47.78 338 -69.17 0.0064
2024-07-29 2024-06-30 13F DEXCOM COM 252131107 9,641 -128 -1.31 1,093 -19.28 0.0222
2024-05-03 2024-03-31 13F DEXCOM COM 252131107 9,769 249 2.62 1,355 14.65 0.0286
2024-02-01 2023-12-31 13F DEXCOM COM 252131107 9,520 740 8.43 1,181 44.20 0.0273
2023-11-03 2023-09-30 13F DEXCOM COM 252131107 8,780 -563 -6.03 819 -31.75 0.0213
2023-08-01 2023-06-30 13F DEXCOM COM 252131107 9,343 65 0.70 1,201 11.42 0.0307
2023-04-28 2023-03-31 13F DEXCOM COM 252131107 9,278 160 1.75 1,078 4.36 0.0294
2023-01-30 2022-12-31 13F DEXCOM COM 252131107 9,118 966 11.85 1,033 57.08 0.0302
2022-11-08 2022-09-30 13F DEXCOM COM 252131107 8,152 2,881 54.66 657 67.18 0.0225
2022-08-10 2022-06-30 13F DEXCOM COM 252131107 5,271 3,672 229.64 393 -51.96 0.0134
2022-05-02 2022-03-31 13F DEXCOM COM 252131107 1,599 -41 -2.50 818 -7.15 0.0246
2022-01-25 2021-12-31 13F DEXCOM COM 252131107 1,640 117 7.68 881 5.76 0.0271
2021-10-28 2021-09-30 13F DEXCOM COM 252131107 1,523 216 16.53 833 49.28 0.0288
2021-07-26 2021-06-30 13F DEXCOM COM 252131107 1,307 111 9.28 558 29.77 0.0223
2021-04-30 2021-03-31 13F DEXCOM COM 252131107 1,196 -141 -10.55 430 -12.96 0.0190
2021-02-11 2020-12-31 13F DEXCOM COM 252131107 1,337 -236 -15.00 494 -23.77 0.0233
2020-11-03 2020-09-30 13F DEXCOM COM 252131107 1,573 -302 -16.11 648 -14.74 0.0347
2020-07-30 2020-06-30 13F DEXCOM COM 252131107 1,875 338 21.99 760 83.57 0.0459
2020-04-23 2020-03-31 13F DEXCOM COM 252131107 1,537 442 40.37 414 72.50 0.0358
2020-02-05 2019-12-31 13F DEXCOM COM 252131107 1,095 28 2.62 240 50.94 0.0177
2019-10-16 2019-09-30 13F DEXCOM COM 252131107 1,067 53 5.23 159 4.61 0.0131
2019-07-31 2019-06-30 13F DEXCOM COM 252131107 1,014 -11 -1.07 152 24.59 0.0131
2019-05-09 2019-03-31 13F DEXCOM COM 252131107 1,025 -400 -28.07 122 -28.65 0.0104
2019-02-13 2018-12-31 13F DEXCOM COM 252131107 1,425 11 0.78 171 -15.35 0.0159
2018-11-14 2018-09-30 13F DEXCOM COM 252131107 1,414 0 0.00 202 50.75 0.0205
2018-08-14 2018-06-30 13F DEXCOM COM 252131107 1,414 0 0.00 134 27.62 0.0149
2018-05-08 2018-03-31 13F DEXCOM COM 252131107 1,414 1,414 0.00 105 -21.64 0.0123
2017-02-14 2016-12-31 13F DEXCOM COM 252131107 0 -1,427 -100.00 0 -100.00
2016-11-14 2016-09-30 13F DEXCOM COM 252131107 1,427 88 6.57 125 17.92 0.0183
2016-07-29 2016-06-30 13F DEXCOM COM 252131107 1,339 0 0.00 106 16.48 0.0155
2016-05-12 2016-03-31 13F DEXCOM COM 252131107 1,339 -8 -0.59 91 -17.27 0.0155
2016-01-22 2015-12-31 13F DEXCOM COM 252131107 1,347 -4 -0.30 110 -5.17 0.0213
2015-10-23 2015-09-30 13F DEXCOM COM 252131107 1,351 -73 -5.13 116 1.75 0.0264
2015-07-15 2015-06-30 13F DEXCOM COM 252131107 1,424 0 0.00 114 28.09 0.0247
2015-04-15 2015-03-31 13F DEXCOM COM 252131107 1,424 24 1.71 89 15.58 0.0216
2015-02-13 2014-12-31 13F DEXCOM COM 252131107 1,400 400 40.00 77 92.50 0.0191
2014-11-13 2014-09-30 13F DEXCOM COM 252131107 1,000 0 0.00 40 0.00 0.0130
2014-08-14 2014-06-30 13F DEXCOM COM 252131107 1,000 0 0.00 40 -2.44 0.0139
2014-05-16 2014-03-31 13F DEXCOM COM 252131107 1,000 0 0.00 41 17.14 0.0165
2014-02-11 2013-12-31 13F DEXCOM COM 252131107 1,000 0 0.00 35 25.00 0.0127
2013-11-13 2013-09-30 13F DEXCOM COM 252131107 1,000 1,000 28 0.0120
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.