DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionJennison Associates Llc
Latest Disclosed Ownership1,048,097 shares
Latest Disclosed Value $ 65,820,461
Jennison Associates Llc reports 81.90% decrease in ownership of DXCM / DexCom, Inc.

On May 6, 2026 - Jennison Associates Llc filed a 13F-HR form disclosing ownership of 1,048,097 shares of DexCom, Inc. (MX:DXCM) valued at $65,820,461 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 5,789,944 shares of DexCom, Inc.. This represents a change in shares of -81.90% 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)
2026-05-06 2026-03-31 13F DEXCOM COM 252131107 1,048,097 -4,741,847 -81.90 65,820 -82.87 0.0453
2026-01-30 2025-12-31 13F DEXCOM COM 252131107 5,789,944 -4,300,430 -42.62 384,279 -43.40 0.2307
2025-10-30 2025-09-30 13F DEXCOM COM 252131107 10,090,374 -1,427,172 -12.39 678,981 -32.46 0.3953
2025-08-01 2025-06-30 13F DEXCOM COM 252131107 11,517,546 994,300 9.45 1,005,367 39.90 0.5963
2025-05-05 2025-03-31 13F DEXCOM COM 252131107 10,523,246 2,879,489 37.67 718,632 20.89 0.5040
2025-01-24 2024-12-31 13F DEXCOM COM 252131107 7,643,757 710,858 10.25 594,455 27.90 0.3610
2024-11-08 2024-09-30 13F DEXCOM COM 252131107 6,932,899 6,544,102 1,683.17 464,782 954.38 0.2885
2024-08-05 2024-06-30 13F DEXCOM COM 252131107 388,797 495 0.13 44,082 -18.15 0.0283
2024-05-02 2024-03-31 13F DEXCOM COM 252131107 388,302 10,217 2.70 53,858 14.79 0.0360
2024-02-01 2023-12-31 13F DEXCOM COM 252131107 378,085 -3,914,081 -91.19 46,917 -88.28 0.0350
2023-10-31 2023-09-30 13F DEXCOM COM 252131107 4,292,166 -2,990,021 -41.06 400,459 -57.21 0.3400
2023-08-03 2023-06-30 13F DEXCOM COM 252131107 7,282,187 17,192 0.24 935,834 10.87 0.7676
2023-04-26 2023-03-31 13F DEXCOM COM 252131107 7,264,995 -1,921,227 -20.91 844,047 -18.86 0.7742
2023-02-09 2022-12-31 13F DEXCOM COM 252131107 9,186,222 2,242,846 32.30 1,040,248 86.02 1.0542
2022-11-01 2022-09-30 13F DEXCOM COM 252131107 6,943,376 -1,620,235 -18.92 559,220 -12.38 0.5561
2022-08-02 2022-06-30 13F DEXCOM COM 252131107 8,563,611 5,963,328 229.33 638,246 -52.02 0.6370
2022-05-11 2022-03-31 13F DEXCOM COM 252131107 2,600,283 1,182,632 83.42 1,330,305 74.76 0.9793
2022-02-08 2021-12-31 13F DEXCOM COM 252131107 1,417,651 -126,206 -8.17 761,208 -9.84 0.4827
2021-11-09 2021-09-30 13F DEXCOM COM 252131107 1,543,857 -53,835 -3.37 844,274 23.76 0.5459
2021-08-12 2021-06-30 13F DEXCOM COM 252131107 1,597,692 -103,192 -6.07 682,214 11.60 0.4520
2021-05-11 2021-03-31 13F DEXCOM COM 252131107 1,700,884 -289,338 -14.54 611,281 -16.93 0.4474
2021-02-05 2020-12-31 13F DEXCOM COM 252131107 1,990,222 -747,643 -27.31 735,825 -34.80 0.5246
2020-11-04 2020-09-30 13F DEXCOM COM 252131107 2,737,865 -24,091 -0.87 1,128,630 0.80 0.9074
2020-08-06 2020-06-30 13F DEXCOM COM 252131107 2,761,956 68,369 2.54 1,119,697 54.38 1.0121
2020-05-06 2020-03-31 13F DEXCOM COM 252131107 2,693,587 -765,171 -22.12 725,302 -4.13 0.8811
2020-02-07 2019-12-31 13F DEXCOM COM 252131107 3,458,758 -580,833 -14.38 756,569 25.49 0.7632
2019-11-08 2019-09-30 13F DEXCOM COM 252131107 4,039,591 2,647,611 190.20 602,869 189.04 0.6368
2019-08-06 2019-06-30 13F DEXCOM COM 252131107 1,391,980 944,642 211.17 208,574 291.48 0.2086
2019-05-10 2019-03-31 13F DEXCOM COM 252131107 447,338 12,891 2.97 53,278 2.37 0.0529
2019-02-06 2018-12-31 13F DEXCOM COM 252131107 434,447 -85,688 -16.47 52,047 -30.04 0.0582
2018-11-08 2018-09-30 13F DEXCOM COM 252131107 520,135 -104,635 -16.75 74,400 25.38 0.0685
2018-08-02 2018-06-30 13F DEXCOM COM 252131107 624,770 -352,739 -36.09 59,341 -18.14 0.0579
2018-04-20 2018-03-31 13F DEXCOM COM 252131107 977,509 -300,690 -23.52 72,492 -1.18 0.0721
2018-01-25 2017-12-31 13F DEXCOM COM 252131107 1,278,199 -403,791 -24.01 73,356 -10.86 0.0724
2017-11-03 2017-09-30 13F DEXCOM COM 252131107 1,681,990 -94,051 -5.30 82,291 -36.66 0.0843
2017-08-04 2017-06-30 13F DEXCOM COM 252131107 1,776,041 278,912 18.63 129,917 2.42 0.1378
2017-08-02 2017-03-31 13F/A-1 DEXCOM COM 252131107 1,497,129 31,082 2.12 126,852 44.94 0.1361
2017-04-28 2017-03-31 13F DEXCOM COM 252131107 1,497,129 31,082 126,852
2017-08-02 2016-12-31 13F/A-1 DEXCOM COM 252131107 1,466,047 264,107 21.97 87,523 -16.93 0.0977
2017-02-06 2016-12-31 13F DEXCOM COM 252131107 1,466,047 87,523
2016-11-01 2016-09-30 13F DEXCOM COM 252131107 1,201,940 -515,634 -30.02 105,362 -22.67 0.1136
2016-08-03 2016-06-30 13F DEXCOM COM 252131107 1,717,574 157,367 10.09 136,255 28.60 0.1495
2016-05-03 2016-03-31 13F DEXCOM COM 252131107 1,560,207 387,636 33.06 105,954 10.33 0.1112
2016-02-10 2015-12-31 13F DEXCOM COM 252131107 1,172,571 208,459 21.62 96,034 16.01 0.0943
2015-11-06 2015-09-30 13F DEXCOM COM 252131107 964,112 623,059 182.69 82,779 203.48 0.0881
2015-08-03 2015-06-30 13F DEXCOM COM 252131107 341,053 299,976 730.28 27,277 965.09 0.0250
2015-06-25 2015-03-31 13F/A-1 DEXCOM COM 252131107 41,077 -20,336 -33.11 2,561 -24.25 0.0023
2015-05-04 2015-03-31 13F DEXCOM COM 252131107 41,077 2,561
2015-06-25 2014-12-31 13F/A-1 DEXCOM COM 252131107 61,413 -7,217 -10.52 3,381 23.17 0.0032
2015-02-06 2014-12-31 13F DEXCOM COM 252131107 61,413 -7,217 3,381 0.0032
2014-11-12 2014-09-30 13F/A-1 DEXCOM COM 252131107 68,630 -1,988 -2.82 2,745 -2.00 0.0025
2014-11-05 2014-09-30 13F DEXCOM COM 252131107 68,630 -1,988 2,745 0.0026
2014-08-08 2014-06-30 13F DEXCOM COM 252131107 70,618 23,088 48.58 2,801 42.47 0.0026
2014-05-07 2014-03-31 13F DEXCOM COM 252131107 47,530 -44,210 -48.19 1,966 -39.49 0.0019
2014-02-10 2013-12-31 13F DEXCOM COM 252131107 91,740 -14,193 -13.40 3,249 8.66 0.0032
2013-11-13 2013-09-30 13F DEXCOM COM 252131107 105,933 23,224 28.08 2,990 61.01 0.0031
2013-08-05 2013-06-30 13F DEXCOM COM 252131107 82,709 82,709 1,857 0.0021
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.