🕵️ Dexcom, Inc. ($DXCM)
SEC insider & ownership activity, last 12 months · CIK 1093557 · every row links its SEC filing
Over the last 12 months insiders sold $8.9M against $1.0M of open-market buying. Kevin R Sayer sold $5.9M through a 10b5-1 trading plan in 3 lots (May–Jul). 1 planned sale is pending, the largest $359K (Jon C Coleman). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $1.0M (2 lots) · 9 sellers, $8.9M (23 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Kevin R Sayer | 0 | – | 3 | $5.9M | Jul 20, 2026 |
| Leach Jacob Steven | 2 | $1.0M | 0 | – | Nov 10, 2025 |
| Jon C Coleman | 0 | – | 2 | $723K | Jun 4, 2026 |
| Michael Brown | 0 | – | 6 | $614K | Jul 15, 2026 |
| Mark G. Foletta | 0 | – | 4 | $519K | Jun 15, 2026 |
| Collins Richard Alexander | 0 | – | 2 | $389K | Nov 14, 2025 |
| Jereme M. Sylvain | 0 | – | 1 | $358K | Sep 2, 2025 |
| Bridgette P. Heller | 0 | – | 3 | $188K | May 12, 2026 |
| Stern Sadie | 0 | – | 1 | $117K | Sep 4, 2025 |
| Malady Kyle | 0 | – | 1 | $54K | Sep 5, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 8.3% | 13G | Apr 24, 2025 | filing ↗ | |
| Vanguard Capital Management | 7.5% | 13G | Apr 29, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.0% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Kevin R Sayer | $2.0M | Jul 20, 2026 | filing ↗ |
| Michael Brown | $127K | Jul 15, 2026 | filing ↗ |
| Kevin R Sayer | $1.9M | Jul 6, 2026 | filing ↗ |
| Mark G. Foletta | $303K | Jun 15, 2026 | filing ↗ |
| Michael Brown | $128K | Jun 15, 2026 | filing ↗ |
| Jon C Coleman | $364K | Jun 4, 2026 | filing ↗ |
| Jon C Coleman | $359K | Jun 3, 2026 | filing ↗ |
| Kevin R Sayer | $1.9M | May 21, 2026 | filing ↗ |
| Michael Brown | $102K | May 15, 2026 | filing ↗ |
| Bridgette P. Heller | $61K | May 12, 2026 | filing ↗ |
| Michael Brown | $107K | Apr 15, 2026 | filing ↗ |
| Michael Brown | $110K | Mar 16, 2026 | filing ↗ |
| Bridgette P. Heller | $69K | Feb 12, 2026 | filing ↗ |
| Collins Richard Alexander | $172K | Nov 14, 2025 | filing ↗ |
| Bridgette P. Heller | $59K | Nov 12, 2025 | filing ↗ |
| Collins Richard Alexander | $218K | Nov 10, 2025 | filing ↗ |
| Malady Kyle | $54K | Sep 5, 2025 | filing ↗ |
| Sadie Stern | $117K | Sep 4, 2025 | filing ↗ |
| Jereme Sylvain | $358K | Sep 2, 2025 | filing ↗ |
| Mark G. Foletta | $221K | Aug 15, 2025 | filing ↗ |
| Michael Brown | $40K | Aug 15, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | May 27, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 14, 2026 | filing ↗ |
| Other events (8.01) | May 14, 2026 | filing ↗ |
| Earnings (2.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 27, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Earnings (2.02) | Feb 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 12, 2026 | filing ↗ |
| Earnings (2.02) | Jan 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 19, 2025 | filing ↗ |
| Earnings (2.02) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 24, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 24, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 24, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 14, 2025 | filing ↗ |
| Earnings (2.02) | Jul 25, 2025 | filing ↗ |
| Officer/director changes (5.02) | Jul 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 25, 2025 | filing ↗ |