DEXCOM INC (DXCM) Stock Institutional Trading Activity
DEXCOM INC (DXCM) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Alta Fox Capital Management, Sequoia Financial Advisors, Cullen Value Fund, and Tiger Global Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q3 2017 | Engaged Capital | Buy | 60,000 | 60,000 | $2,936 |
| Q1 2017 | Renaissance Technologies LLC | Buy | 157,500 | 295,143 | $25,007 |
| Q4 2016 | Renaissance Technologies LLC | Sell | -204,163 | 137,643 | $8,217 |
| Q2 2016 | Renaissance Technologies LLC | Sell | -476,137 | 341,806 | $27,115 |
| Q1 2016 | Viking Global Investors | Buy | 486,489 | 486,489 | $33,037 |
| Q1 2016 | Renaissance Technologies LLC | Buy | 124,000 | 817,943 | $55,547 |
| Q4 2015 | Renaissance Technologies LLC | Buy | 557,300 | 693,943 | $56,834 |
| Q3 2015 | Renaissance Technologies LLC | Buy | 109,743 | 136,643 | $11,732 |
| Q2 2015 | Renaissance Technologies LLC | Sell | -42,443 | 26,900 | $2,151 |
| Q1 2015 | Renaissance Technologies LLC | Sell | -200,000 | 69,343 | $4,323 |
| Q4 2014 | Renaissance Technologies LLC | Sell | -111,500 | 269,343 | $14,827 |
| Q1 2014 | Renaissance Technologies LLC | Sell | -176,700 | 380,843 | $15,752 |
| Q4 2013 | Renaissance Technologies LLC | Buy | 350,200 | 557,543 | $19,743 |
| Q3 2013 | Renaissance Technologies LLC | Buy | 90,200 | 207,343 | $5,851 |
| Q2 2013 | Renaissance Technologies LLC | Buy | 117,143 | 117,143 | $2,630 |
Frequently asked questions about DXCM activity
Which institutional owners are buying DXCM?
Institutional owners buying DXCM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in DXCM activity?
"Buy" means an investor increased their reported position in DXCM compared to the prior reporting period. This reflects growing exposure to DEXCOM INC (DXCM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in DXCM increasing?
Institutional interest in DXCM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.