DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionJanney Montgomery Scott LLC
Latest Disclosed Ownership47,404 shares
Latest Disclosed Value $ 2,977
Janney Montgomery Scott LLC reports 11.68% increase in ownership of DXCM / DexCom, Inc.

On April 22, 2026 - Janney Montgomery Scott LLC filed a 13F-HR form disclosing ownership of 47,404 shares of DexCom, Inc. (MX:DXCM) valued at $2,977 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 42,446 shares of DexCom, Inc.. This represents a change in shares of 11.68% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-22 2026-03-31 13F DEXCOM Common Stock 252131107 47,404 4,958 11.68 3 0.00 0.0074
2026-02-11 2025-12-31 13F DEXCOM Common Stock 252131107 42,446 -14,865 -25.94 3 -33.33 0.0065
2025-10-27 2025-09-30 13F DEXCOM Common Stock 252131107 57,311 14,244 33.07 4 0.00 0.0091
2025-07-17 2025-06-30 13F DEXCOM Common Stock 252131107 43,067 -195,357 -81.94 4 -81.25 0.0098
2025-04-17 2025-03-31 13F DEXCOM Common Stock 252131107 238,424 5,881 2.53 16 -11.11 0.0462
2025-01-17 2024-12-31 13F DEXCOM Common Stock 252131107 232,543 222,548 2,226.59 18 0.0501
2024-10-29 2024-09-30 13F DEXCOM Common Stock 252131107 9,995 -13,060 -56.65 1 -100.00 0.0019
2024-07-25 2024-06-30 13F DEXCOM Common Stock 252131107 23,055 -5,804 -20.11 3 -50.00 0.0080
2024-05-01 2024-03-31 13F DEXCOM Common Stock 252131107 28,859 -3,012 -9.45 4 33.33 0.0119
2024-02-08 2023-12-31 13F DEXCOM Common Stock 252131107 31,871 -4,294 -11.87 4 0.00 0.0128
2023-11-08 2023-09-30 13F DEXCOM Common Stock 252131107 36,165 -21,505 -37.29 3 -57.14 0.0126
2023-07-26 2023-06-30 13F DEXCOM Common Stock 252131107 57,670 13,061 29.28 7 40.00 0.0259
2023-04-28 2023-03-31 13F DEXCOM Common Stock 252131107 44,609 -1,233 -2.69 5 0.00 0.0212
2023-02-01 2022-12-31 13F DEXCOM Common Stock 252131107 45,842 10,597 30.07 5 -99.82 0.0202
2022-10-25 2022-09-30 13F DEXCOM Common Stock 252131107 35,245 -927 -2.56 2,838 5.19 0.0122
2022-08-03 2022-06-30 13F DEXCOM Common Stock 252131107 36,172 27,806 332.37 2,698 -36.96 0.0122
2022-05-04 2022-03-31 13F DAVIS SEL INTL ETF Common Stock 252131107 8,366 757 9.95 4,280 4.75 0.0183
2022-01-27 2021-12-31 13F DEXCOM Common Stock 252131107 7,609 348 4.79 4,086 2.90 0.0159
2021-10-29 2021-09-30 13F DEXCOM Common Stock 252131107 7,261 382 5.55 3,971 35.21 0.0170
2021-07-26 2021-06-30 13F DEXCOM Common Stock 252131107 6,879 4,139 151.06 2,937 198.17 0.0130
2021-04-27 2021-03-31 13F DEXCOM Common Stock 252131107 2,740 -2,426 -46.96 985 -48.43 0.0048
2021-01-25 2020-12-31 13F DEXCOM Common Stock 252131107 5,166 -12,749 -71.16 1,910 -74.14 0.0092
2020-11-06 2020-09-30 13F DEXCOM Common Stock 252131107 17,915 -839 -4.47 7,385 -2.87 0.0421
2020-07-23 2020-06-30 13F DEXCOM Common Stock 252131107 18,754 10,365 123.55 7,603 236.56 0.0480
2020-04-30 2020-03-31 13F DEXCOM Common Stock 252131107 8,389 -2,983 -26.23 2,259 -9.20 0.0179
2020-01-21 2019-12-31 13F DEXCOM Common Stock 252131107 11,372 -352 -3.00 2,488 42.17 0.0163
2019-10-29 2019-09-30 13F DEXCOM Common Stock 252131107 11,724 -636 -5.15 1,750 -5.51 0.0127
2019-07-29 2019-06-30 13F DEXCOM Common Stock 252131107 12,360 2,357 23.56 1,852 55.50 0.0142
2019-04-30 2019-03-31 13F/A-1 DEXCOM Common Stock 252131107 10,003 4,220 72.97 1,191 71.86 0.0098
2019-04-30 2019-03-31 13F DEXCOM Common Stock 252131107 5,783 0 693
2019-02-01 2018-12-31 13F DEXCOM Common Stock 252131107 5,783 1,471 34.11 693 12.32 0.0067
2018-11-05 2018-09-30 13F DEXCOM Common Stock 252131107 4,312 -43 -0.99 617 49.03 0.0053
2018-07-24 2018-06-30 13F DEXCOM Common Stock 252131107 4,355 -495 -10.21 414 15.00 0.0040
2018-04-19 2018-03-31 13F DEXCOM Common Stock 252131107 4,850 400 8.99 360 41.18 0.0036
2018-02-14 2017-12-31 13F DEXCOM Common Stock 252131107 4,450 4,450 -8.25 255 -29.17 0.0026
2017-11-15 2017-09-30 13F DEXCOM Common Stock 252131107 0 -2,959 -100.00 0 -100.00
2017-07-27 2017-06-30 13F DEXCOM Common Stock 252131107 2,959 250 9.23 216 -6.09 0.0027
2017-04-26 2017-03-31 13F DEXCOM Common Stock 252131107 2,709 -786 -22.49 230 10.05 0.0031
2017-02-13 2016-12-31 13F DEXCOM Common Stock 252131107 3,495 -108 -3.00 209 -33.86 0.0032
2016-11-14 2016-09-30 13F DEXCOM Common Stock 252131107 3,603 -2,287 -38.83 316 -32.48 0.0056
2016-08-11 2016-06-30 13F/A-1 DEXCOM Common Stock 252131107 5,890 5,890 63.47 468 48.10 0.0095
2016-08-05 2016-06-30 13F DEXCOM Common Stock 252131107 5,462 440
2016-05-10 2016-03-31 13F DEXCOM Common Stock 252131107 0 -2,517 -100.00 0 -100.00
2016-02-19 2015-12-31 13F DEXCOM Common Stock 252131107 2,517 117 4.88 206 0.00 0.0053
2015-11-16 2015-09-30 13F DEXCOM Common Stock 252131107 2,400 2,400 206 0.0058
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.