DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership635,553 shares
Latest Disclosed Value $ 39,912,728
National Pension Service reports 2.74% increase in ownership of DXCM / DexCom, Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 635,553 shares of DexCom, Inc. (MX:DXCM) valued at $39,912,728 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 618,615 shares of DexCom, Inc.. This represents a change in shares of 2.74% 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)
2026-05-12 2026-03-31 13F DEXCOM COM 252131107 635,553 16,938 2.74 39,913 -2.79 0.0303
2026-02-10 2025-12-31 13F DEXCOM DEXCOM INC 252131107 618,615 58,262 10.40 41,057 8.89 0.0304
2025-11-04 2025-09-30 13F DEXCOM COM 252131107 560,353 2,976 0.53 37,706 -22.50 0.0293
2025-08-08 2025-06-30 13F DEXCOM COM 252131107 557,377 4,442 0.80 48,653 28.85 0.0420
2025-05-13 2025-03-31 13F DEXCOM COM 252131107 552,935 -63,795 -10.34 37,760 -21.27 0.0363
2025-02-05 2024-12-31 13F DEXCOM COM 252131107 616,730 -333,013 -35.06 47,963 -24.67 0.0454
2024-10-30 2024-09-30 13F DEXCOMINC COM 252131107 949,743 37,363 4.10 63,671 -38.45 0.0614
2024-08-13 2024-06-30 13F DEXCOM COM 252131107 912,380 24,709 2.78 103,446 -15.98 0.1189
2024-05-14 2024-03-31 13F DEXCOM COM 252131107 887,671 13,556 1.55 123,120 13.51 0.1477
2024-02-07 2023-12-31 13F DEXCOM COM 252131107 874,115 22,931 2.69 108,469 43.80 0.1510
2023-11-15 2023-09-30 13F DEXCOM COM 252131107 851,184 42,174 5.21 75,432 -27.12 0.1207
2023-08-16 2023-06-30 13F DEXCOM COM 252131107 809,010 232,544 40.34 103,505 56.95 0.1670
2023-05-12 2023-03-31 13F DEXCOM COM 252131107 576,466 -5,361 -0.92 65,948 0.09 0.1201
2023-02-24 2022-12-31 13F/A-1 DEXCOM COM 252131107 581,827 -14,859 -2.49 65,886 34.50 0.1296
2023-02-21 2022-12-31 13F DEXCOM COM 252131107 581,827 -14,859 66 0.1296
2023-02-24 2022-09-30 13F/A-1 DEXCOM COM 252131107 596,686 22,611 3.94 48,988 14.49 0.1022
2022-11-18 2022-09-30 13F DEXCOM COM 252131107 596,686 22,611 48,988 0.1022
2022-08-17 2022-06-30 13F DEXCOM COM 252131107 574,075 438,034 321.99 42,786 -38.52 0.0882
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 136,041 9,506 7.51 69,599 2.44 0.1271
2022-02-15 2021-12-31 13F DEXCOM COM 252131107 126,535 -11,319 -8.21 67,943 -9.87 0.1185
2021-11-18 2021-09-30 13F DEXCOM COM 252131107 137,854 1,389 1.02 75,387 29.37 0.1435
2021-08-17 2021-06-30 13F DEXCOM COM 252131107 136,465 678 0.50 58,271 19.41 0.1107
2021-05-14 2021-03-31 13F DEXCOM COM 252131107 135,787 -8,922 -6.17 48,800 -8.79 0.1021
2021-02-19 2020-12-31 13F DEXCOM NOTE 252131107 144,709 13,559 10.34 53,502 1.94 0.1220
2020-11-13 2020-09-30 13F DEXCOM NOTE 252131107 131,150 0 0.00 52,485 -1.28 0.1379
2020-08-11 2020-06-30 13F DEXCOM NOTE 252131107 131,150 -10,706 -7.55 53,168 39.19 0.1519
2020-05-27 2020-03-31 13F DEXCOM COM 252131107 141,856 0 0.00 38,198 23.10 0.1293
2020-02-21 2019-12-31 13F DEXCOM COM 252131107 141,856 139,630 6,272.69 31,030 9,246.39 0.0851
2019-11-15 2019-09-30 13F DEXCOM NOTE 252131107 2,226 0 0.00 332 -0.60 0.0011
2019-08-14 2019-06-30 13F DEXCOM NOTE 252131107 2,226 2,226 334 0.0011
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.