DexCom, Inc.
MX ˙ BMV ˙ US2521311074
SecurityMX:DXCM / DexCom, Inc.
InstitutionKorea Investment CORP
Latest Disclosed Ownership699,303 shares
Latest Disclosed Value $ 43,916,228
Korea Investment CORP reports 10.31% increase in ownership of DXCM / DexCom, Inc.

On May 13, 2026 - Korea Investment CORP filed a 13F-HR form disclosing ownership of 699,303 shares of DexCom, Inc. (MX:DXCM) valued at $43,916,228 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 633,959 shares of DexCom, Inc.. This represents a change in shares of 10.31% 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)
2026-05-13 2026-03-31 13F DEXCOM COM 252131107 699,303 65,344 10.31 43,916 4.38 0.0910
2026-02-13 2025-12-31 13F DEXCOM COM 252131107 633,959 -135,705 -17.63 42,076 -18.76 0.0828
2025-11-13 2025-09-30 13F DEXCOM COM 252131107 769,664 390,501 102.99 51,791 56.48 0.1065
2025-08-13 2025-06-30 13F DEXCOM COM 252131107 379,163 195,180 106.09 33,097 163.43 0.0736
2025-05-14 2025-03-31 13F DEXCOM COM 252131107 183,983 -150,900 -45.06 12,564 -51.76 0.0305
2025-02-12 2024-12-31 13F DEXCOM COM 252131107 334,883 400 0.12 26,044 16.14 0.0617
2024-11-13 2024-09-30 13F DEXCOM COM 252131107 334,483 -1,545 -0.46 22,424 -41.14 0.0532
2024-08-13 2024-06-30 13F DEXCOM COM 252131107 336,028 -91,450 -21.39 38,099 -35.74 0.0960
2024-05-14 2024-03-31 13F DEXCOM COM 252131107 427,478 15,450 3.75 59,291 15.97 0.1505
2024-02-13 2023-12-31 13F DEXCOM COM 252131107 412,028 -46,054 -10.05 51,129 19.63 0.1343
2023-11-13 2023-09-30 13F DEXCOM COM 252131107 458,082 -119,232 -20.65 42,739 -42.39 0.1259
2023-08-11 2023-06-30 13F DEXCOM COM 252131107 577,314 227,938 65.24 74,191 82.78 0.2085
2023-05-12 2023-03-31 13F DEXCOM COM 252131107 349,376 148,061 73.55 40,591 78.06 0.1182
2023-02-13 2022-12-31 13F DEXCOM COM 252131107 201,315 -23,596 -10.49 22,797 25.85 0.0716
2022-11-10 2022-09-30 13F DEXCOM COM 252131107 224,911 91,523 68.61 18,114 82.22 0.0558
2022-08-12 2022-06-30 13F DEXCOM COM 252131107 133,388 110,888 492.84 9,941 -13.64 0.0304
2022-05-13 2022-03-31 13F DEXCOM COM 252131107 22,500 -1,900 -7.79 11,511 -12.14 0.0285
2022-02-09 2021-12-31 13F DEXCOM COM 252131107 24,400 6,900 39.43 13,102 36.91 0.0341
2021-11-12 2021-09-30 13F DEXCOM COM 252131107 17,500 -2,400 -12.06 9,570 12.63 0.0285
2021-08-12 2021-06-30 13F DEXCOM COM 252131107 19,900 -100 -0.50 8,497 18.21 0.0243
2021-05-13 2021-03-31 13F DEXCOM COM 252131107 20,000 -7,600 -27.54 7,188 -29.56 0.0227
2021-02-10 2020-12-31 13F DEXCOM COM 252131107 27,600 -35,800 -56.47 10,204 -60.96 0.0307
2020-11-12 2020-09-30 13F DEXCOM COM 252131107 63,400 9,100 16.76 26,135 18.73 0.0923
2020-08-12 2020-06-30 13F DEXCOM COM 252131107 54,300 25,100 85.96 22,013 179.96 0.0809
2020-05-14 2020-03-31 13F DEXCOM COM 252131107 29,200 27,400 1,522.22 7,863 1,895.69 0.0345
2020-02-11 2019-12-31 13F DEXCOM COM 252131107 1,800 -13,200 -88.00 394 -82.40 0.0014
2019-11-12 2019-09-30 13F DEXCOM COM 252131107 15,000 -18,300 -54.95 2,239 -55.13 0.0095
2019-08-12 2019-06-30 13F DEXCOM COM 252131107 33,300 200 0.60 4,990 26.59 0.0215
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 33,100 27,300 470.69 3,942 467.19 0.0177
2019-02-13 2018-12-31 13F DEXCOM COM 252131107 5,800 5,800 695 0.0038
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.