DexCom, Inc.
AT ˙ WBAG ˙ US2521311074
64,40 € ↑1,20 (1,90%)
2026-06-05
DEL PRIS
SecurityAT:DXCM / DexCom, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership12,923,644 shares
Latest Disclosed Value $ 857,742,252
Alliancebernstein L.p. reports 49.85% increase in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 12,923,644 shares of DexCom, Inc. (AT:DXCM) valued at $700,978,451 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,624,132 shares of DexCom, Inc.. This represents a change in shares of 49.85% during the quarter. The current value of the position is $832,282,674 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)
2026-05-15 2026-03-31 13F DEXCOM COM 252131107 12,923,644 4,299,512 49.85 857,742 49.85 0.2778
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 8,624,132 8,204,553 1,955.43 572,384 1,927.35 0.1807
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 419,579 -89,459 -17.57 28,233 -36.46 0.0089
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 509,038 -34,250 -6.30 44,434 19.76 0.0145
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 543,288 -11,876 -2.14 37,101 -14.07 0.0134
2025-02-12 2024-12-31 13F DEXCOM COM 252131107 555,164 107,916 24.13 43,175 44.00 0.0147
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 447,248 -19,509 -4.18 29,984 -43.34 0.0101
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 466,757 -39,648 -7.83 52,921 -24.66 0.0185
2024-05-14 2024-03-31 13F DEXCOM COM 252131107 506,405 2,020 0.40 70,238 12.22 0.0249
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 504,385 9,319 1.88 62,589 35.51 0.0241
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 495,066 16,429 3.43 46,190 -24.91 0.0196
2023-08-15 2023-06-30 13F DEXCOM COM 252131107 478,637 -17,673 -3.56 61,510 6.67 0.0251
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 496,310 -21,731 -4.19 57,661 -1.71 0.0247
2023-02-15 2022-12-31 13F DEXCOM COM 252131107 518,041 5,592 1.09 58,663 42.13 0.0264
2022-11-15 2022-09-30 13F DEXCOM COM 252131107 512,449 11,493 2.29 41,273 10.54 0.0200
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 500,956 375,265 298.56 37,336 -41.94 0.0171
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 125,691 960 0.77 64,304 -3.99 0.0248
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 124,731 -9,471 -7.06 66,974 -8.74 0.0237
2021-11-10 2021-09-30 13F DEXCOM COM 252131107 134,202 2,851 2.17 73,390 30.85 0.0290
2021-07-30 2021-06-30 13F DEXCOM COM 252131107 131,351 -1,484 -1.12 56,087 17.48 0.0225
2021-05-06 2021-03-31 13F DEXCOM COM 252131107 132,835 -6,841 -4.90 47,740 -7.55 0.0209
2021-02-08 2020-12-31 13F DEXCOM COM 252131107 139,676 -5,002 -3.46 51,641 -13.41 0.0244
2020-11-12 2020-09-30 13F DEXCOM COM 252131107 144,678 5,385 3.87 59,641 5.62 0.0321
2020-08-13 2020-06-30 13F DEXCOM COM 252131107 139,293 77,984 127.20 56,469 242.05 0.0332
2020-05-14 2020-03-31 13F DEXCOM COM 252131107 61,309 8,939 17.07 16,509 44.12 0.0118
2020-02-18 2019-12-31 13F DEXCOM COM 252131107 52,370 762 1.48 11,455 48.73 0.0065
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 51,608 -2,544 -4.70 7,702 -5.08 0.0048
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 54,152 -2,403 -4.25 8,114 20.46 0.0050
2019-05-14 2019-03-31 13F DEXCOM COM 252131107 56,555 -1,439 -2.48 6,736 -3.05 0.0044
2019-02-13 2018-12-31 13F DEXCOM COM 252131107 57,994 5,470 10.41 6,948 -7.52 0.0052
2018-11-08 2018-09-30 13F DEXCOM COM 252131107 52,524 -611 -1.15 7,513 48.86 0.0049
2018-08-13 2018-06-30 13F DEXCOM COM 252131107 53,135 3,610 7.29 5,047 37.41 0.0035
2018-05-14 2018-03-31 13F DEXCOM COM 252131107 49,525 621 1.27 3,673 30.85 0.0027
2018-02-13 2017-12-31 13F DEXCOM COM 252131107 48,904 -1,122,724 -95.83 2,807 -95.10 0.0020
2017-11-13 2017-09-30 13F DEXCOM COM 252131107 1,171,628 -48,365 -3.96 57,322 -35.77 0.0429
2017-08-10 2017-06-30 13F DEXCOM COM 252131107 1,219,993 -94,279 -7.17 89,242 -19.86 0.0690
2017-05-11 2017-03-31 13F DEXCOM COM 252131107 1,314,272 70,766 5.69 111,358 50.00 0.0887
2017-02-13 2016-12-31 13F DEXCOM COM 252131107 1,243,506 24,554 2.01 74,237 -30.52 0.0619
2016-11-10 2016-09-30 13F DEXCOM COM 252131107 1,218,952 -491,075 -28.72 106,853 -21.23 0.0902
2016-08-11 2016-06-30 13F DEXCOM COM 252131107 1,710,027 3,624 0.21 135,656 17.06 0.1168
2016-05-13 2016-03-31 13F DEXCOM COM 252131107 1,706,403 213,620 14.31 115,882 -5.22 0.0985
2016-02-16 2015-12-31 13F/A-1 DEXCOM COM 252131107 1,492,783 -322,070 -17.75 122,259 -21.54 0.1040
2016-02-12 2015-12-31 13F DEXCOM COM 252131107 1,492,783 128,170
2015-11-13 2015-09-30 13F DEXCOM COM 252131107 1,814,853 -308,861 -14.54 155,823 -8.26 0.1337
2015-08-14 2015-06-30 13F DEXCOM COM 252131107 2,123,714 209,810 10.96 169,855 42.36 0.1403
2015-05-13 2015-03-31 13F DEXCOM COM 252131107 1,913,904 1,777,611 1,304.26 119,313 1,490.20 0.0967
2015-02-13 2014-12-31 13F DEXCOM COM 252131107 136,293 -6,000 -4.22 7,503 31.86 0.0062
2014-11-13 2014-09-30 13F DEXCOM COM 252131107 142,293 0 0.00 5,690 0.83 0.0048
2014-08-13 2014-06-30 13F DEXCOM COM 252131107 142,293 -79,325 -35.79 5,643 -38.44 0.0048
2014-05-13 2014-03-31 13F DEXCOM COM 252131107 221,618 75,668 51.85 9,166 77.36 0.0079
2014-02-13 2013-12-31 13F DEXCOM COM 252131107 145,950 35 0.02 5,168 25.47 0.0046
2013-11-14 2013-09-30 13F DEXCOM COM 252131107 145,915 359 0.25 4,119 26.04 0.0041
2013-08-13 2013-06-30 13F DEXCOM COM 252131107 145,556 145,556 3,268 0.0035
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.