DexCom, Inc.
DexCom, Inc. (DXCM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · DXCM · as of Mar 31, 2025
Ownership Breakdown
1,003
Institutional Holders
▼ 18 vs Q4
$24.86B
Total Inst. Value
▼ $3.04B vs Q4
385.87M
Shares Outstanding
freeFloat 99.62%
364.70M
13F Shares Held
▲ 6.04M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
DXCM largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 47.46M | 12.13% | 12.13% | $3.24T | May 9, 2025 | ▲ 925.9K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 39.24M | 10.03% | 10.03% | $2.68T | May 2, 2025 | ▼ 358.4K |
STATE STREET CORP surgical & medical instruments & apparatus | 16.68M | 4.27% | 4.27% | $1.14T | May 15, 2025 | ▼ 3.4K |
BAILLIE GIFFORD & CO surgical & medical instruments & apparatus | 14.18M | 3.63% | 3.63% | $968.34B | May 7, 2025 | ▼ 433.0K |
CAPITAL RESEARCH GLOBAL INVESTORS surgical & medical instruments & apparatus | 12.04M | 3.08% | 3.08% | $821.98B | May 12, 2025 | ▼ 2.34M |
JENNISON ASSOCIATES LLC surgical & medical instruments & apparatus | 10.52M | 2.69% | 2.69% | $718.63B | May 5, 2025 | ▲ 2.88M |
SANDS CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 10.41M | 2.66% | 2.66% | $711.18B | May 14, 2025 | ▼ 695.3K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 10.41M | 2.66% | 2.66% | $708.59B | May 13, 2025 | ▲ 414.0K |
UBS ASSET MANAGEMENT AMERICAS INC surgical & medical instruments & apparatus | 10.12M | 2.59% | 2.59% | $691.34B | May 19, 2025 | ▲ 2.93M |
NUVEEN, LLC surgical & medical instruments & apparatus | 8.13M | 2.08% | 2.08% | $554.89B | May 12, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
26
Increased
+21.23M shares1
New Positions
first time holders23
Decreased
−10.29M shares0
Sold Out
fully exitedNet shares change (top 50)
+10.95M
+21.23M / −10.29M
Net new holders
+4
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
DXCM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
14
Buy transactions
15
Sell transactions
0.93
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Coleman Jon EVP, Chief Commercial Officer | Jun 3, 2026 | Sale | 4,912 | $73.00 | $358.6K | 100.4K | Form 4 ↗ |
Coleman Jon EVP, Chief Commercial Officer | Jun 4, 2026 | Sale | 4,911 | $74.13 | $364.1K | 95.5K | Form 4 ↗ |
ALTMAN STEVEN R director | May 28, 2026 | Award | 5,565 | — | — | 5.6K | Form 4 ↗ |
Malady Kyle director | May 28, 2026 | Award | 5,575 | — | — | 28.2K | Form 4 ↗ |
AUGUSTINOS NICHOLAS director | May 28, 2026 | Award | 5,575 | — | — | 5.6K | Form 4 ↗ |
FOLETTA MARK G director | May 28, 2026 | Award | 6,331 | — | — | 6.3K | Form 4 ↗ |
Heller Bridgette P director | May 28, 2026 | Award | 5,575 | — | — | 30.6K | Form 4 ↗ |
Osterloh Albert Frederick IV director | May 28, 2026 | Award | 1,630 | — | — | 8.7K | Form 4 ↗ |
Driscoll Rimma director | May 28, 2026 | Award | 5,605 | — | — | 17.3K | Form 4 ↗ |
Ashley Euan A. director | May 28, 2026 | Award | 5,565 | — | — | 12.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
DexCom, Inc. (DXCM) is primarily owned by institutional investors, who hold approximately 94.5% of total shares outstanding. Company insiders own approximately 0.38%, while retail and public investors account for the remaining 5.11%.
The largest institutional shareholder of DexCom, Inc. is VANGUARD GROUP INC, holding approximately 47.46 million shares — equal to 12.13% of outstanding shares — as of March 31, 2025.
A total of 1,003 institutional investors currently hold DXCM stock, with a combined institutional value of approximately $24.86 billion as of the most recent 13F filing period.
Frequently asked questions
DXCM ownershipDexCom, Inc. (DXCM) is primarily owned by institutional investors, who hold approximately 94.5% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.13% stake. Company insiders hold 0.38%. Data sourced from SEC Form 13F as of March 31, 2025.