DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership108,300 shares
Latest Disclosed Value $ 6,801,240
Nissay Asset Management Corp /japan/ /adv reports 2.08% increase in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 108,300 shares of DexCom, Inc. (MX:DXCM) valued at $6,801,240 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 106,092 shares of DexCom, Inc.. This represents a change in shares of 2.08% 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)
2026-05-15 2026-03-31 13F DEXCOM COM 252131107 108,300 2,208 2.08 6,801 -3.41 0.0360
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 106,092 4,985 4.93 7,041 3.50 0.0366
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 101,107 1,747 1.76 6,803 -21.56 0.0376
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 99,360 3,285 3.42 8,673 32.21 0.0508
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 96,075 7,497 8.46 6,561 -7.70 0.0426
2025-02-14 2024-12-31 13F DEXCOM COM 252131107 88,578 -12,956 -12.76 7,107 4.42 0.0433
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 101,534 8,656 9.32 6,807 -35.37 0.0431
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 92,878 8,953 10.67 10,531 -9.54 0.0697
2024-05-15 2024-03-31 13F DEXCOM COM 252131107 83,925 16,289 24.08 11,640 38.70 0.0807
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 67,636 4,747 7.55 8,393 43.04 0.0675
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 62,889 3,527 5.94 5,868 -23.09 0.0520
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 59,362 476 0.81 7,629 11.50 0.0658
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 58,886 -12,778 -17.83 6,841 -15.70 0.0611
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 71,664 6,395 9.80 8,115 54.37 0.0776
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 65,269 2,089 3.31 5,257 11.64 0.0552
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 63,180 48,884 341.94 4,709 -35.62 0.0469
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 14,296 257 1.83 7,314 -2.97 0.0637
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 14,039 1,099 8.49 7,538 6.53 0.0577
2021-11-10 2021-09-30 13F DEXCOM COM 252131107 12,940 433 3.46 7,076 32.51 0.0600
2021-08-13 2021-06-30 13F DEXCOM COM 252131107 12,507 2,504 25.03 5,340 48.54 0.0469
2021-05-11 2021-03-31 13F DEXCOM COM 252131107 10,003 -207 -2.03 3,595 -4.77 0.0354
2021-02-08 2020-12-31 13F DEXCOM COM 252131107 10,210 99 0.98 3,775 -9.43 0.0568
2020-10-20 2020-09-30 13F DEXCOM COM 252131107 10,111 -1,852 -15.48 4,168 -14.06 0.0704
2020-07-27 2020-06-30 13F DEXCOM COM 252131107 11,963 869 7.83 4,850 62.37 0.0941
2020-05-05 2020-03-31 13F DEXCOM COM 252131107 11,094 603 5.75 2,987 30.15 0.0761
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 10,491 3,056 41.10 2,295 106.76 0.0510
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 7,435 438 6.26 1,110 5.92 0.0275
2019-08-07 2019-06-30 13F DEXCOM COM 252131107 6,997 -801 -10.27 1,048 12.81 0.0265
2019-05-03 2019-03-31 13F DEXCOM COM 252131107 7,798 421 5.71 929 5.09 0.0245
2019-02-06 2018-12-31 13F DEXCOM COM 252131107 7,377 7,377 884 0.0269
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.