DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionTwo Sigma Advisers, Lp
Latest Disclosed Ownership748,076 shares
Latest Disclosed Value $ 49,649,804
Two Sigma Advisers, Lp reports 93.66% increase in ownership of DXCM / DexCom, Inc.

On February 17, 2026 - Two Sigma Advisers, Lp filed a 13F-HR form disclosing ownership of 748,076 shares of DexCom, Inc. (MX:DXCM) valued at $49,649,804 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 386,276 shares of DexCom, Inc.. This represents a change in shares of 93.66% 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)
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 748,076 361,800 93.66 49,650 91.02 0.0965
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 386,276 372,600 2,724.48 25,993 2,078.71 0.0520
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 13,676 -585,400 -97.72 1,194 -97.08 0.0024
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 599,076 -644,700 -51.83 40,911 -57.71 0.0921
2025-02-14 2024-12-31 13F DEXCOM COM 252131107 1,243,776 100,300 8.77 96,728 26.18 0.2238
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 1,143,476 739,000 182.71 76,659 67.16 0.1796
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 404,476 404,476 45,859 0.1023
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 0 -56,476 -100.00 0 -100.00
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 56,476 -260,600 -82.19 5,269 -87.07 0.0135
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 317,076 -184,500 -36.78 40,747 -30.08 0.1038
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 501,576 430,900 609.68 58,273 628.14 0.1503
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 70,676 -184,700 -72.32 8,003 -61.09 0.0223
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 255,376 -845,600 -76.80 20,568 -74.93 0.0595
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 1,100,976 844,507 329.28 82,056 -37.46 0.2328
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 256,469 -184,900 -41.89 131,210 -44.64 0.3488
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 441,369 435,700 7,685.66 236,993 7,544.94 0.5936
2021-11-15 2021-09-30 13F DEXCOM COM 252131107 5,669 5,669 3,100 0.0080
2021-08-16 2021-06-30 13F DEXCOM COM 252131107 0 -4,269 -100.00 0 -100.00
2021-05-17 2021-03-31 13F DEXCOM COM 252131107 4,269 4,269 1,534 0.0042
2021-02-16 2020-12-31 13F DEXCOM COM 252131107 0 -131,069 -100.00 0 -100.00
2020-11-16 2020-09-30 13F DEXCOM COM 252131107 131,069 300 0.23 54,031 1.92 0.1543
2020-09-15 2020-06-30 13F/A-1 DEXCOM COM 252131107 130,769 24,800 23.40 53,014 85.79 0.1558
2020-08-14 2020-06-30 13F DEXCOM COM 252131107 130,769 24,800 53,014 153,192.8533
2020-05-15 2020-03-31 13F DEXCOM COM 252131107 105,969 66,000 165.13 28,534 226.36 0.1092
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 39,969 39,969 -62.28 8,743 -69.36 0.0203
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 0 -419,114 -100.00 0 -100.00
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 419,114 -132,800 -24.06 62,800 -4.46 0.1563
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 551,914 -142,900 -20.57 65,733 -21.03 0.1658
2019-02-14 2018-12-31 13F DEXCOM COM 252131107 694,814 651,200 1,493.10 83,239 1,234.17 0.2273
2018-11-14 2018-09-30 13F DEXCOM COM 252131107 43,614 43,614 -93.72 6,239 -92.50 0.0152
2016-05-16 2016-03-31 13F DEXCOM COM 252131107 0 -3,180 -100.00 0 -100.00
2016-02-16 2015-12-31 13F DEXCOM COM 252131107 3,180 -57,216 -94.73 260 -94.99 0.0015
2015-11-16 2015-09-30 13F DEXCOM COM 252131107 60,396 60,396 1,799.25 5,191 1,896.54 0.0327
2015-05-15 2015-03-31 13F DEXCOM COM 252131107 0 -12,514 -100.00 0 -100.00
2016-02-09 2014-12-31 13F/A-1 DEXCOM COM 252131107 12,514 12,514 0.00 689 0.15 0.0055
2015-02-17 2014-12-31 13F DEXCOM COM 252131107 12,514 688
2014-08-14 2014-06-30 13F DexCom Common Stock 252131107 0 -16,814 -100.00 0 -100.00
2014-05-15 2014-03-31 13F DexCom Common Stock 252131107 16,814 1,200 7.69 697 26.04 0.0063
2014-02-14 2013-12-31 13F DEXCOM COM 252131107 15,614 6,100 64.12 553 106.34 0.0053
2013-11-14 2013-09-30 13F DEXCOM COM 252131107 9,514 9,514 268 0.0032
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.