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DXCM DexCom, Inc.
Insider figures are trailing 90 days, open-market Form 4 only. Institutional figures are the latest reported quarter. These windows are not simultaneous.
-$6.6M net selling - trailing 90 days
0 buyers - 9 unique sellers
Historical context: most recent complete month (2026-09) is the 27th percentile of this ticker's monthly net P/S flow over 24 complete months. Lower percentiles are more selling; higher are more buying. P10–P90: -$3.4M to $0.
10 accumulating - 2 trimming - 2 unchanged
14 comparable institutions - Q2 2026
open-market Form 4 only - grants, exercises, tax withholding excluded. ~ derived from SEC-reported shares x price.
Who is responsible
| Insider | Role | Net activity | Rows |
|---|---|---|---|
| SAYER KEVIN R | Executive Chair | -~$4.5M | 4 |
| AUGUSTINOS NICHOLAS | — | -~$0.7M | 2 |
| FOLETTA MARK G | — | -~$0.3M | 2 |
| Sylvain Jereme M | EVP, Chief Financal Officer | -~$0.3M | 1 |
| Stern Sadie | EVP Chief People & Culture Off | -~$0.2M | 1 |
| Stern Sadie | EVP Chief People & Culture Off | -~$0.2M | 1 |
| Brown Michael Jon | EVP Chief Legal Compliance Off | -~$0.2M | 1 |
| Brown Michael Jon | EVP Chief Legal Compliance Off | -~$0.1M | 1 |
| Heller Bridgette P | — | -~$89K | 1 |
Transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| September 28, 2026 | Stern Sadie | EVP Chief People & Culture Off | S | -2565 | 86.15 | ~$0.2M |
| September 15, 2026 | AUGUSTINOS NICHOLAS | — | S | -6539 | 84.04 | ~$0.5M |
| September 15, 2026 | Brown Michael Jon | EVP Chief Legal Compliance Off | S | -1700 | 84.04 | ~$0.1M |
| September 14, 2026 | AUGUSTINOS NICHOLAS | — | S | -1550 | 84.02 | ~$0.1M |
| September 10, 2026 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -3638 | 83.27 | ~$0.3M |
| August 27, 2026 | Stern Sadie | EVP Chief People & Culture Off | S | -2565 | 88.37 | ~$0.2M |
| August 20, 2026 | SAYER KEVIN R | Executive Chair | 3 reported sale rows | 26756 | — | ~$2.4M |
| August 20, 2026 | SAYER KEVIN R | Executive Chair | S | -7351 | 90.7811 | ~$0.7M |
| August 20, 2026 | SAYER KEVIN R | Executive Chair | S | -97 | 91.41 | ~$9K |
| August 20, 2026 | SAYER KEVIN R | Executive Chair | S | -19308 | 89.706 | ~$1.7M |
| August 14, 2026 | Brown Michael Jon | EVP Chief Legal Compliance Off | S | -1700 | 91.93 | ~$0.2M |
| August 12, 2026 | Heller Bridgette P | — | S | -1012 | 88.29 | ~$89K |
| August 3, 2026 | FOLETTA MARK G | — | S | -2000 | 85.32 | ~$0.2M |
| July 31, 2026 | FOLETTA MARK G | — | S | -2000 | 80 | ~$0.2M |
| July 20, 2026 | SAYER KEVIN R | Executive Chair | S | -26756 | 76.3193 | ~$2.0M |
| July 15, 2026 | Brown Michael Jon | EVP Chief Legal Compliance Off | S | -1700 | 74.42 | ~$0.1M |
| July 6, 2026 | SAYER KEVIN R | Executive Chair | S | -26756 | 72 | ~$1.9M |
| June 15, 2026 | FOLETTA MARK G | — | 2 reported sale rows | 4000 | — | ~$0.3M |
| June 15, 2026 | FOLETTA MARK G | — | S | -199 | 74.8187 | ~$15K |
| June 15, 2026 | FOLETTA MARK G | — | S | -3801 | 74.0991 | ~$0.3M |
| June 15, 2026 | Brown Michael Jon | EVP Chief Legal Compliance Off | S | -1700 | 75.55 | ~$0.1M |
| June 4, 2026 | Coleman Jon | EVP, Chief Commercial Officer | S | -4911 | 74.13 | ~$0.4M |
| June 3, 2026 | Coleman Jon | EVP, Chief Commercial Officer | S | -4912 | 73 | ~$0.4M |
| May 21, 2026 | SAYER KEVIN R | Executive Chair | S | -26759 | 72 | ~$1.9M |
| May 15, 2026 | Brown Michael Jon | EVP, Chief Legal Officer | S | -1700 | 59.91 | ~$0.1M |
| May 12, 2026 | Heller Bridgette P | — | S | -1012 | 60.01 | ~$61K |
| April 15, 2026 | Brown Michael Jon | EVP, Chief Legal Officer | S | -1700 | 63.04 | ~$0.1M |
| March 16, 2026 | Brown Michael Jon | EVP, Chief Legal Officer | S | -1700 | 64.85 | ~$0.1M |
| February 12, 2026 | Heller Bridgette P | — | S | -1012 | 68.01 | ~$69K |
| November 14, 2025 | Collins Richard Alexander | — | S | -2906 | 59.05 | ~$0.2M |
| November 12, 2025 | Heller Bridgette P | — | S | -1012 | 58.07 | ~$59K |
| November 10, 2025 | Collins Richard Alexander | — | S | -3948 | 55.17 | ~$0.2M |
| November 10, 2025 | Leach Jacob Steven | President & COO | 2 reported purchase rows | 18200 | — | ~$1.0M |
| November 10, 2025 | Leach Jacob Steven | President & COO | P | 15700 | 54.977 | ~$0.9M |
| November 10, 2025 | Leach Jacob Steven | President & COO | P | 2500 | 55.4252 | ~$0.1M |
| September 5, 2025 | Malady Kyle | — | S | -667 | 80.86 | ~$54K |
| September 4, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -1466 | 80 | ~$0.1M |
| September 2, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -4824 | 74.17 | ~$0.4M |
| August 15, 2025 | Brown Michael Jon | EVP, Chief Legal Officer | S | -500 | 80.29 | ~$40K |
| August 15, 2025 | FOLETTA MARK G | — | 2 reported sale rows | 2750 | — | ~$0.2M |
| August 15, 2025 | FOLETTA MARK G | — | S | -195 | 81.54 | ~$16K |
| August 15, 2025 | FOLETTA MARK G | — | S | -2555 | 81.0186 | ~$0.2M |
| July 28, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -1466 | 88.99 | ~$0.1M |
| July 15, 2025 | FOLETTA MARK G | — | 2 reported sale rows | 2750 | — | ~$0.2M |
| July 15, 2025 | FOLETTA MARK G | — | S | -8 | 86.03 | ~$1K |
| July 15, 2025 | FOLETTA MARK G | — | S | -2742 | 85.1672 | ~$0.2M |
| July 15, 2025 | Brown Michael Jon | EVP, Chief Legal Officer | S | -500 | 86.03 | ~$43K |
| June 26, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -1466 | 85.06 | ~$0.1M |
| June 16, 2025 | AUGUSTINOS NICHOLAS | — | S | -3672 | 82.8 | ~$0.3M |
| June 16, 2025 | Brown Michael Jon | EVP, Chief Legal Officer | S | -500 | 82.8 | ~$41K |
| June 16, 2025 | FOLETTA MARK G | — | S | -2750 | 83.129 | ~$0.2M |
| June 13, 2025 | AUGUSTINOS NICHOLAS | — | S | -2618 | 81.69 | ~$0.2M |
| May 27, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -6184 | 85.1097 | ~$0.5M |
| May 23, 2025 | Brown Michael Jon | EVP, Chief Legal Officer | S | -10000 | 84.2849 | ~$0.8M |
| March 17, 2025 | Heller Bridgette P | — | S | -352 | 70.33 | ~$25K |
| March 12, 2025 | Leach Jacob Steven | EVP, Chief Operating Officer | S | -14076 | 70.3801 | ~$1.0M |
| March 12, 2025 | SAYER KEVIN R | Chairman, CEO & President | S | -32498 | 70.3801 | ~$2.3M |
| March 12, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -11176 | 70.3801 | ~$0.8M |
| March 12, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -12001 | 70.3801 | ~$0.8M |
| March 12, 2025 | Brown Michael Jon | EVP, Chief Legal Officer | S | -13000 | 70.3801 | ~$0.9M |
| March 10, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | 3 reported sale rows | 7000 | — | ~$0.5M |
| March 10, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -3203 | 74.0404 | ~$0.2M |
| March 10, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -1127 | 74.7023 | ~$84K |
| March 10, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -2670 | 73.217 | ~$0.2M |
| January 29, 2025 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -2090 | 86.9141 | ~$0.2M |
| January 29, 2025 | Dolan Matthew Vincent | EVP, Strategy & Corporate Dev | S | -1183 | 86.9144 | ~$0.1M |
| January 29, 2025 | Stern Sadie | EVP, Chief HR Officer | S | -2093 | 86.9141 | ~$0.2M |
| January 29, 2025 | Leach Jacob Steven | EVP, Chief Operating Officer | S | -2634 | 86.9142 | ~$0.2M |
| January 29, 2025 | SAYER KEVIN R | Chairman, CEO & President | S | -33359 | 86.9141 | ~$2.9M |
| December 16, 2024 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -744 | 76.87 | ~$57K jointly filed |
| December 16, 2024 | Leach Jacob Steven | EVP, Chief Operating Officer | S | -744 | 76.87 | ~$57K jointly filed |
| December 16, 2024 | Stern Sadie | EVP, Chief HR Officer | S | -424 | 76.87 | ~$33K |
| December 16, 2024 | Heller Bridgette P | — | S | -1000 | 76.87 | ~$77K |
| November 20, 2024 | Stern Sadie | EVP, Chief HR Officer | S | -4259 | 74.73 | ~$0.3M |
| November 15, 2024 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -3500 | 75.51 | ~$0.3M |
| September 16, 2024 | Heller Bridgette P | — | S | -1000 | 70 | ~$70K |
| September 9, 2024 | Sylvain Jereme M | EVP, Chief Financal Officer | S | -746 | 69.15 | ~$52K jointly filed |
| September 9, 2024 | Stern Sadie | EVP, Chief HR Officer | S | -426 | 69.15 | ~$29K |
| September 9, 2024 | Leach Jacob Steven | EVP, Chief Operating Officer | S | -746 | 69.15 | ~$52K jointly filed |