DexCom, Inc. (DXCM) Ownership
DXCM ownership summary
as of October 18, 2026- Institutions
- 106.4% of shares outstanding
- Insiders
- 0.26% of shares outstanding
- Shares outstanding
- 377.4M
- Float
- 376.0M shares available to trade
- Short interest
- 4.29% 14.0M shares short
- Days to cover
- 3.52 short interest down 18.8% vs prior month
- Institutions 106.43%
- Insiders 0.26%
DXCM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 10.13% | 38.2M | $3.29B | −720,234 (−1.8%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.68% | 25.2M | $2.17B | +188,791 (+0.8%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.21% | 19.7M | $1.69B | +436,587 (+2.3%) | June 30, 2026 |
| 4 | State Street Corp | 4.87% | 18.4M | $1.58B | +445,959 (+2.5%) | June 30, 2026 |
| 5 | Amvescap Plc. | 4.05% | 15.3M | $1.32B | +1.6M (+11.8%) | June 30, 2026 |
| 6 | Baillie Gifford & Co Limited. | 3.92% | 14.8M | $1.27B | −797,935 (−5.1%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 3.29% | 12.4M | $1.07B | +79,877 (+0.6%) | June 30, 2026 |
| 8 | AllianceBernstein L.P. | 3.10% | 11.7M | $1.01B | −1.2M (−9.5%) | June 30, 2026 |
| 9 | UBS Asset Mgmt Americas Inc | 2.98% | 11.3M | $969.0M | +1.5M (+15.6%) | June 30, 2026 |
| 10 | Wellington Management Company LLP | 2.26% | 8.5M | $733.7M | −798,769 (−8.6%) | June 30, 2026 |
| 11 | Arrowstreet Capital Limited Partnership | 1.82% | 6.9M | $591.4M | +4.3M (+170.1%) | June 30, 2026 |
| 12 | NORGES BANK | 1.82% | 6.9M | $590.9M | −414,653 (−5.7%) | June 30, 2026 |
| 13 | UBS Group AG | 1.61% | 6.1M | $521.9M | +1.7M (+39.4%) | June 30, 2026 |
| 14 | Amundi | 1.48% | 5.6M | $482.1M | −729,071 (−11.5%) | June 30, 2026 |
| 15 | Morgan Stanley - Brokerage Accounts | 1.37% | 5.2M | $443.6M | +114,238 (+2.3%) | June 30, 2026 |
| 16 | Ameriprise Financial Inc | 1.28% | 4.8M | $414.8M | +579,991 (+13.7%) | June 30, 2026 |
| 17 | Castle Hook Partners LP | 1.03% | 3.9M | $333.0M | +3.1M (+382.7%) | June 30, 2026 |
| 18 | The Goldman Sachs Group Inc | 1.00% | 3.8M | $323.4M | +714,981 (+23.5%) | June 30, 2026 |
| 19 | Franklin Templeton Inc | 0.95% | 3.6M | $309.4M | +988,455 (+37.9%) | June 30, 2026 |
| 20 | Massachusetts Financial Services Company | 0.94% | 3.6M | $306.4M | +1.6M (+84.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 17.4M shares and 6 cut 4.7M.
DXCM top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.25% | 12.3M | $1.06B | −25,000 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.63% | 9.9M | $852.4M | −345,426 (−3.4%) | September 30, 2026 |
| 3 | Vanguard MStar Mid Cap Index Instl | 2.14% | 8.1M | $695.3M | −266,087 (−3.2%) | September 30, 2026 |
| 4 | Invesco QQQ Trust | 2.09% | 7.9M | $678.0M | −12,848 (−0.2%) | September 30, 2026 |
| 5 | Vanguard Health Care Inv | 1.54% | 5.8M | $499.7M | −254,382 (−4.2%) | June 30, 2026 |
| 6 | Vanguard MStar Growth Index Investor | 1.34% | 5.0M | $434.2M | +142,727 (+2.9%) | September 30, 2026 |
| 7 | iShares Core S&P 500 ETF | 1.33% | 5.0M | $432.6M | −8,103 (−0.2%) | September 30, 2026 |
| 8 | Fidelity 500 Index | 1.33% | 5.0M | $431.0M | +19,239 (+0.4%) | August 31, 2026 |
| 9 | State Street® SPDR® S&P 500® ETF | 1.22% | 4.6M | $396.8M | — | September 30, 2026 |
| 10 | AllianceBernstein US L/C Growth Eqty MF | 0.90% | 3.4M | $293.4M | — | June 30, 2026 |
| 11 | Vanguard MStar Mid Cap Growth ETF | 0.79% | 3.0M | $254.9M | −1,782 (−0.1%) | September 30, 2026 |
| 12 | State Street®HlthCrSelSectSPDR®ETF | 0.71% | 2.7M | $230.2M | +8,320 (+0.3%) | September 30, 2026 |
| 13 | Invesco S&P 500® Equal Weight ETF | 0.62% | 2.3M | $200.8M | −4,845 (−0.2%) | September 30, 2026 |
| 14 | MFS Mid Cap Growth A | 0.58% | 2.2M | $189.2M | — | August 31, 2026 |
| 15 | Xtrackers MSCI World Swap ETF 1C | 0.57% | 2.1M | $184.6M | −122,753 (−5.4%) | December 31, 2025 |
| 16 | iShares Russell Mid-Cap Growth ETF | 0.56% | 2.1M | $181.6M | −2,256 (−0.1%) | September 30, 2026 |
| 17 | Vanguard Institutional Index I | 0.53% | 2.0M | $171.7M | −66,893 (−3.2%) | September 30, 2026 |
| 18 | iShares US Medical Devices ETF | 0.49% | 1.9M | $159.3M | +32,400 (+1.8%) | September 30, 2026 |
| 19 | Invesco NASDAQ 100 ETF | 0.46% | 1.7M | $149.2M | +4,032 (+0.2%) | September 30, 2026 |
| 20 | iShares Russell Mid-Cap ETF | 0.41% | 1.5M | $133.3M | +2,850 (+0.2%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
DXCM insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-15 | Michael Jon Brown | Sell | $63.04 | 1,700 | $107,168 |
| 2026-03-30 | Ro Khanna | Sell | $61.90 | — | — |
| 2026-03-23 | Ro Khanna | Sell | $65.94 | — | — |
| 2026-03-16 | Michael Jon Brown | Sell | $64.85 | 1,700 | $110,245 |
| 2026-02-17 | Ro Khanna | Buy | $70.43 | — | — |
| 2026-02-05 | Ro Khanna | Sell | $69.89 | — | — |
| 2026-02-04 | Michael T. McCaul | Sell | $70.83 | — | — |
| 2026-01-29 | Ro Khanna | Buy | $74.00 | — | — |
| 2026-01-26 | John Boozman | Buy | $73.34 | — | — |
| 2025-11-14 | Richard Alexander Collins | Sell | $59.05 | 2,906 | $171,599 |
| 2025-11-12 | Bridgette P Heller | Sell | $58.07 | 1,012 | $58,767 |
| 2025-11-10 | Jacob Steven Leach | Buy | $55.04 | 18,200 | $1.0M |
| 2025-11-10 | Richard Alexander Collins | Sell | $55.17 | 3,948 | $217,811 |
| 2025-10-27 | Michael T. McCaul | Sell | $70.63 | — | — |
| 2025-09-29 | Ro Khanna | Sell | $66.46 | — | — |
| 2025-09-22 | Michael T. McCaul | Buy | $69.51 | — | — |
| 2025-09-05 | Kyle Malady | Sell | $80.86 | 667 | $53,934 |
| 2025-09-04 | Sadie Stern | Sell | $80.00 | 1,466 | $117,280 |
| 2025-08-21 | Michael T. McCaul | Sell | $80.62 | — | — |
| 2025-08-15 | Michael Jon Brown | Sell | $80.29 | 500 | $40,145 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
DXCM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns DXCM
Institutional investors own 106.4% of DexCom's shares and insiders 0.26%. The largest holder is BlackRock Inc with 10.13% of the shares (38.2M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 4.29% of the float, or 3.52 days of average trading volume. The share count rose 22.1% since 2014.
Related: DXCM analyst forecast, DXCM key metrics. See the DXCM stock overview for the latest quote and news.
DXCM ownership FAQ
Who owns the most DexCom stock?
The largest shareholders of DexCom are BlackRock Inc (10.13%), Vanguard Capital Management, LLC (6.68%), Vanguard Portfolio Management, LLC (5.21%), State Street Corp (4.87%), Amvescap Plc. (4.05%).
What percentage of DexCom is owned by institutions?
Institutions hold 106.4% of DexCom's shares outstanding; insiders hold 0.26%.
Which funds own DexCom?
The largest fund holders of DexCom are Vanguard MStar Total Stk Mkt Idx Invest (3.25%), Vanguard 500 Index Investor (2.63%), Vanguard MStar Mid Cap Index Instl (2.14%), Invesco QQQ Trust (2.09%), Vanguard Health Care Inv (1.54%).
What is DexCom's short interest?
14.0M shares of DexCom were sold short, 4.29% of the float; at the average daily volume it would take 3.52 days to cover.
Are insiders buying or selling DexCom?
Of the latest 20 reported insider transactions in DexCom (since August 15, 2025), 5 were purchases and 15 were sales.
How many shares of DexCom are outstanding?
DexCom has 377.4M shares outstanding, of which 376.0M are in the public float.