DexCom, Inc.
US ˙ NasdaqGS ˙ US2521311074

SecurityDXCM / DexCom, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership28,965 shares
Latest Disclosed Value $ 1,819,002
Engineers Gate Manager LP reports 88.98% decrease in ownership of DXCM / DexCom, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 28,965 shares of DexCom, Inc. (US:DXCM) valued at $1,819,002 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 262,911 shares of DexCom, Inc.. This represents a change in shares of -88.98% during the quarter. The current value of the position is $2,107,783 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 28,965 -233,946 -88.98 1,819 -89.58 0.0227
2026-02-17 2025-12-31 13F DEXCOM COM 252131107 262,911 63,451 31.81 17,449 30.01 0.2069
2025-11-14 2025-09-30 13F DEXCOM COM 252131107 199,460 187,122 1,516.63 13,422 1,147.30 0.1537
2025-08-14 2025-06-30 13F DEXCOM COM 252131107 12,338 -276,488 -95.73 1,077 -94.54 0.0134
2025-05-15 2025-03-31 13F DEXCOM COM 252131107 288,826 152,688 112.16 19,724 86.29 0.3325
2025-02-14 2024-12-31 13F DEXCOM COM 252131107 136,138 -145,198 -51.61 10,587 -43.87 0.1843
2024-11-14 2024-09-30 13F DEXCOM COM 252131107 281,336 173,981 162.06 18,861 54.96 0.3681
2024-08-14 2024-06-30 13F DEXCOM COM 252131107 107,355 104,341 3,461.88 12,172 2,811.72 0.2745
2024-05-15 2024-03-31 13F DEXCOM COM 252131107 3,014 -12,705 -80.83 418 -78.56 0.0110
2024-02-14 2023-12-31 13F DEXCOM COM 252131107 15,719 -105,536 -87.04 1,951 -82.76 0.0557
2023-11-14 2023-09-30 13F DEXCOM COM 252131107 121,255 114,551 1,708.70 11,313 1,213.94 0.4182
2023-08-14 2023-06-30 13F DEXCOM COM 252131107 6,704 -52,829 -88.74 862 -87.55 0.0326
2023-05-15 2023-03-31 13F DEXCOM COM 252131107 59,533 12,753 27.26 6,917 30.56 0.2890
2023-02-14 2022-12-31 13F DEXCOM COM 252131107 46,780 43,620 1,380.38 5,297 1,977.25 0.3182
2022-11-14 2022-09-30 13F DEXCOM COM 252131107 3,160 -1,340 -29.78 255 -23.88 0.0159
2022-08-15 2022-06-30 13F DEXCOM COM 252131107 4,500 4,500 335 0.0123
2022-05-16 2022-03-31 13F DEXCOM COM 252131107 0 -21,893 -100.00 0 -100.00
2022-02-14 2021-12-31 13F DEXCOM COM 252131107 21,893 21,175 2,949.16 11,755 2,891.09 0.5287
2021-11-15 2021-09-30 13F DEXCOM COM 252131107 718 718 393 0.0224
2021-08-16 2021-06-30 13F DEXCOM COM 252131107 0 -1,050 -100.00 0 -100.00
2021-05-17 2021-03-31 13F DEXCOM COM 252131107 1,050 -380 -26.57 377 -28.73 0.0187
2021-02-16 2020-12-31 13F DEXCOM COM 252131107 1,430 -2,411 -62.77 529 -66.58 0.0229
2020-11-16 2020-09-30 13F DEXCOM COM 252131107 3,841 -1,971 -33.91 1,583 -32.81 0.0743
2020-08-17 2020-06-30 13F DEXCOM COM 252131107 5,812 933 19.12 2,356 79.30 0.1199
2020-05-15 2020-03-31 13F DEXCOM COM 252131107 4,879 -63,800 -92.90 1,314 -91.25 0.0947
2020-02-14 2019-12-31 13F DEXCOM COM 252131107 68,679 64,969 1,751.19 15,023 2,611.73 0.6606
2019-11-14 2019-09-30 13F DEXCOM COM 252131107 3,710 3,710 -94.60 554 -96.31 0.0281
2019-08-14 2019-06-30 13F DEXCOM COM 252131107 0 -100,010 -100.00 0 -100.00
2019-05-15 2019-03-31 13F DEXCOM COM 252131107 100,010 59,857 149.07 11,911 147.63 0.7213
2019-02-14 2018-12-31 13F DEXCOM COM 252131107 40,153 18,692 87.10 4,810 56.68 0.3849
2018-11-01 2018-09-30 13F DEXCOM COM 252131107 21,461 21,461 -46.55 3,070 -36.17 0.2359
2016-05-09 2016-03-31 13F DEXCOM COM 252131107 0 -46,470 -100.00 0 -100.00
2016-02-05 2015-12-31 13F DEXCOM COM 252131107 46,470 23,972 106.55 3,806 97.00 0.2570
2015-11-16 2015-09-30 13F DEXCOM COM 252131107 22,498 22,498 -51.59 1,932 -49.24 0.1645
2015-08-14 2015-06-30 13F DEXCOM COM 252131107 0 -19,570 -100.00 0 -100.00
2015-05-15 2015-03-31 13F DEXCOM COM 252131107 19,570 9,193 88.59 1,220 113.66 0.1622
2015-02-17 2014-12-31 13F DEXCOM COM 252131107 10,377 10,377 571 0.1626
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.