🕵️ 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 $12.4M against $1.0M of open-market buying. Kevin R. Sayer sold $8.3M through a 10b5-1 trading plan in 6 lots (May–Aug). 2 planned sales are pending, the largest $160K (Mark G. Foletta). 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, $12.4M (29 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Kevin R. Sayer | 0 | – | 6 | $8.3M | Aug 20, 2026 |
| Leach Jacob Steven | 2 | $1.0M | 0 | – | Nov 10, 2025 |
| Michael Brown | 0 | – | 7 | $873K | Sep 15, 2026 |
| Jon C. Coleman | 0 | – | 2 | $723K | Jun 4, 2026 |
| Augustinos Nicholas | 0 | – | 2 | $680K | Sep 15, 2026 |
| Mark G. Foletta | 0 | – | 4 | $627K | Aug 3, 2026 |
| Collins Richard Alexander | 0 | – | 2 | $389K | Nov 14, 2025 |
| Jereme M. Sylvain | 0 | – | 1 | $303K | Sep 10, 2026 |
| Bridgette P. Heller | 0 | – | 4 | $278K | Aug 12, 2026 |
| Stern Sadie | 0 | – | 1 | $227K | Aug 27, 2026 |
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 | |
|---|---|---|---|
| Augustinos Nicholas | $550K | Sep 15, 2026 | filing ↗ |
| Michael Brown | $143K | Sep 15, 2026 | filing ↗ |
| Augustinos Nicholas | $130K | Sep 14, 2026 | filing ↗ |
| Jereme Sylvain | $303K | Sep 10, 2026 | filing ↗ |
| Sadie Stern | $227K | Aug 27, 2026 | filing ↗ |
| Kevin R. Sayer | $2.4M | Aug 20, 2026 | filing ↗ |
| Michael Brown | $156K | Aug 14, 2026 | filing ↗ |
| Bridgette P. Heller | $89K | Aug 12, 2026 | filing ↗ |
| Mark G. Foletta | $171K | Aug 3, 2026 | filing ↗ |
| Mark G. Foletta | $160K | Jul 31, 2026 | filing ↗ |
| 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 ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Sep 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 10, 2026 | filing ↗ |
| Officer/director changes (5.02) | Sep 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 10, 2026 | filing ↗ |
| Earnings (2.02) | Jul 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2026 | filing ↗ |
| 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 ↗ |