Supply breakdown
Shares as of Oct 22, 2026| Category | Shares | % | Value | Status |
|---|---|---|---|---|
| Circulating | 372.95M | 100.0% | $25.12B | Estimated |
| Free float | - | - | - | Unavailable |
| Insider-held, unrestricted | - | - | - | Unavailable |
| Locked team funds | - | - | - | Unavailable |
| Other restricted (unlisted classes only) | - | - | - | Unavailable |
| Total outstanding | 372.95M | 100.0% | $25.12B | Verified |
| Ownership views (overlap the categories above, never added) | ||||
| Institutional holdings (13F; over 100%, double counted) | 385.94M | 103.5% | $25.99B | Estimated |
| Insider-held, all (Forms 3, 4, 5) | - | - | - | Unavailable |
Institutional and insider holdings can include both tradable and locked shares, so they are shown for reference and never added to the total. Check: no class has more shares deducted than it has outstanding, and the review found no shares that may be counted twice: reconciles.
Valuation
- Traditional$25.12B
- Fully diluted$25.71B
- Circulating$25.12B
- Free float-
- Locked team value$0
- Other restricted value$0
Locked and restricted shares
Not reviewed yet.
Institutional holders
13F, quarter ended Jun 30, 2026| Holder | Shares | % of total |
|---|---|---|
| BlackRock, Inc. | 38.24M | 10.25% |
| VANGUARD CAPITAL MANAGEMENT LLC | 25.21M | 6.76% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 19.66M | 5.27% |
| STATE STREET CORP | 18.38M | 4.93% |
| Invesco Ltd. | 15.29M | 4.10% |
| BAILLIE GIFFORD & CO | 14.80M | 3.97% |
| GEODE CAPITAL MANAGEMENT, LLC | 12.43M | 3.33% |
| ALLIANCEBERNSTEIN L.P. | 11.69M | 3.14% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 11.26M | 3.02% |
| WELLINGTON MANAGEMENT GROUP LLP | 8.53M | 2.29% |
Sum of long share positions in Form 13F reports for the quarter. 13F covers managers with over $100M in US equities; some positions are reported by more than one filer. The total is 103% of shares outstanding, so it counts some shares twice: positions reported by more than one manager, and lent shares that appear at both the lender and the buyer. Read it as an upper bound.
Insiders
Forms 3, 4 and 5Form 4 aggregation pending
Share classes
| Class | Listing | Shares outstanding | As of |
|---|---|---|---|
| Common stock | DXCM on Nasdaq | 372,950,922 | Oct 22, 2026 |
Notes and sources
- DEXCOM INC 10-Q for period ended 2026-09-30, Cover page (0001093557-26-000195)
- SEC public float (non-affiliates): $34.20B as of Jun 30, 2025, from the 10-K cover. It is a dollar value at a past date, not circulating supply.