DexCom, Inc. (DXCM) ownership: Top institutional holder: VANGUARD GROUP INC ($3.26B). Insider activity: Net Seller (3 buys, 17 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 49074378.00 | $3.26B | 2025-12-31 |
| BlackRock, Inc. | 38964371.00 | $2.45B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 25020961.00 | $1.57B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 19219953.00 | $1.21B | 2026-03-31 |
| STATE STREET CORP | 17934847.00 | $1.13B | 2026-03-31 |
| BAILLIE GIFFORD & CO | 15599525.00 | $979.65M | 2026-03-31 |
| ALLIANCEBERNSTEIN L.P. | 12923644.00 | $857.74M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 12346638.00 | $772.91M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-05-28 | |
| Sell | null | 2026-05-28 | |
| Sell | null | 2026-05-28 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.