DXCM insider buying and SEC filings, explained
Dexcom Inc. · CIK 1093557
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$1.0M
Insiders who bought
1
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$13.0M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 27, 2026 | Planned (10b5-1) | Sadie Stern (EVP Chief People & Culture Off) sold 2,565 shares at $78.62 ($202K), marked as a 10b5-1 plan trade. Holdings down 2% to 120,913 shares. | SEC filing Filed Oct 28, 2026, 7:08 PM ET |
| Oct 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP Chief Legal Compliance Off) sold 1,700 shares at $85.48 ($145K), marked as a 10b5-1 plan trade. Holdings down 2% to 98,185 shares. | SEC filing Filed Oct 19, 2026, 6:42 PM ET |
| Sep 28, 2026 | Planned (10b5-1) | Sadie Stern (EVP Chief People & Culture Off) sold 2,565 shares at $86.15 ($221K), marked as a 10b5-1 plan trade. Holdings down 2% to 123,478 shares. | SEC filing Filed Sep 30, 2026 |
| Sep 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP Chief Legal Compliance Off) sold 1,700 shares at $84.04 ($143K), marked as a 10b5-1 plan trade. Holdings down 2% to 99,885 shares. | SEC filing Filed Sep 16, 2026 |
| Sep 14–15, 2026 | Planned (10b5-1) | Nicholas Augustinos (Director) sold 8,089 shares indirectly (by trust) between Sep 14 and Sep 15 at about $84.04 ($680K), marked as a 10b5-1 plan trade. Holdings by trust down 22% to 29,293 shares. | SEC filing Filed Sep 16, 2026 |
| Sep 10, 2026 | Planned (10b5-1) | Jereme M Sylvain (EVP, Chief Financal Officer) sold 3,638 shares at $83.27 ($303K), marked as a 10b5-1 plan trade. Holdings down 2% to 146,828 shares. | SEC filing Filed Sep 14, 2026 |
| Aug 27, 2026 | Planned (10b5-1) | Sadie Stern (EVP Chief People & Culture Off) sold 2,565 shares at $88.37 ($227K), marked as a 10b5-1 plan trade. Holdings down 2% to 126,043 shares. | SEC filing Filed Aug 28, 2026 |
| Aug 20, 2026 | Planned (10b5-1) | Kevin R. Sayer (Chair and Director) sold 26,756 shares at about $90.01 ($2.4M), marked as a 10b5-1 plan trade. Holdings down 8% to 302,214 shares. | SEC filing Filed Aug 24, 2026 |
| Aug 14, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP Chief Legal Compliance Off) sold 1,700 shares at $91.93 ($156K), marked as a 10b5-1 plan trade. Holdings down 2% to 102,953 shares. | SEC filing Filed Aug 17, 2026 |
| Aug 12, 2026 | Planned (10b5-1) | Bridgette P Heller (Director) sold 1,012 shares at $88.29 ($89K), marked as a 10b5-1 plan trade. Holdings down 3% to 29,570 shares. | SEC filing Filed Aug 13, 2026 |
| Jul 31–Aug 3, 2026 | Planned (10b5-1) | Mark G. Foletta (Director) sold 4,000 shares indirectly (by trust) between Jul 31 and Aug 3 at about $82.66 ($331K), marked as a 10b5-1 plan trade. Holdings by trust down 8% to 48,852 shares. | SEC filing Filed Aug 4, 2026 |
| Jul 20, 2026 | Planned (10b5-1) | Kevin R. Sayer (Chair and Director) sold 26,756 shares at about $76.32 ($2.0M), marked as a 10b5-1 plan trade. Holdings down 8% to 328,970 shares. | SEC filing Filed Jul 21, 2026 |
| Jul 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP Chief Legal Compliance Off) sold 1,700 shares at $74.42 ($127K), marked as a 10b5-1 plan trade. Holdings down 2% to 104,653 shares. | SEC filing Filed Jul 16, 2026 |
| Jul 6, 2026 | Planned (10b5-1) | Kevin R. Sayer (Chair and Director) sold 26,756 shares at $72.00 ($1.9M), marked as a 10b5-1 plan trade. Holdings down 7% to 355,726 shares. | SEC filing Filed Jul 7, 2026 |
| Jun 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP Chief Legal Compliance Off) sold 1,700 shares at $75.55 ($128K), marked as a 10b5-1 plan trade. Holdings down 2% to 106,353 shares. | SEC filing Filed Jun 17, 2026 |
| Jun 15, 2026 | Planned (10b5-1) | Mark G. Foletta (Director) sold 4,000 shares indirectly (by trust) at about $74.14 ($297K), marked as a 10b5-1 plan trade. Holdings by trust down 7% to 52,852 shares. | SEC filing Filed Jun 17, 2026 |
| Jun 3–4, 2026 | Planned (10b5-1) | Jon Coleman (EVP, Chief Commercial Officer) sold 9,823 shares between Jun 3 and Jun 4 at about $73.56 ($723K), marked as a 10b5-1 plan trade. Holdings down 9% to 95,450 shares. | SEC filing Filed Jun 5, 2026 |
| May 21, 2026 | Planned (10b5-1) | Kevin R. Sayer (Chair and Director) sold 26,759 shares at $72.00 ($1.9M), marked as a 10b5-1 plan trade. Holdings down 7% to 382,482 shares. | SEC filing Filed May 26, 2026 |
| May 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP, Chief Legal Officer) sold 1,700 shares at $59.91 ($102K), marked as a 10b5-1 plan trade. Holdings down 2% to 109,504 shares. | SEC filing Filed May 19, 2026 |
| May 12, 2026 | Planned (10b5-1) | Bridgette P Heller (Director) sold 1,012 shares at $60.01 ($61K), marked as a 10b5-1 plan trade. Holdings down 4% to 25,007 shares. | SEC filing Filed May 14, 2026 |
| Apr 15, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP, Chief Legal Officer) sold 1,700 shares at $63.04 ($107K), marked as a 10b5-1 plan trade. Holdings down 2% to 111,204 shares. | SEC filing Filed Apr 16, 2026 |
| Mar 16, 2026 | Planned (10b5-1) | Michael Jon Brown (EVP, Chief Legal Officer) sold 1,700 shares at $64.85 ($110K), marked as a 10b5-1 plan trade. Holdings down 1% to 112,904 shares. | SEC filing Filed Mar 18, 2026 |
| Feb 12, 2026 | Planned (10b5-1) | Bridgette P Heller (Director) sold 1,012 shares at $68.01 ($69K), marked as a 10b5-1 plan trade. Holdings down 4% to 26,019 shares. | SEC filing Filed Feb 17, 2026 |
| Nov 14, 2025 | Planned (10b5-1) | Richard Alexander Collins (Director) sold 2,906 shares indirectly (by trust) at $59.05 ($172K), marked as a 10b5-1 plan trade. Holdings by trust down 8% to 35,088 shares. | SEC filing Filed Nov 17, 2025 |
| Nov 12, 2025 | Planned (10b5-1) | Bridgette P Heller (Director) sold 1,012 shares at $58.07 ($59K), marked as a 10b5-1 plan trade. Holdings down 4% to 27,031 shares. | SEC filing Filed Nov 12, 2025 |
| Nov 10, 2025 | Purchase (code P) | Jacob Steven Leach (President / COO) bought 18,200 shares at about $55.04 ($1.0M), reported as a purchase (code P). Holdings up 6% to 331,697 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 10, 2025 |
| Nov 10, 2025 | Planned (10b5-1) | Richard Alexander Collins (Director) sold 3,948 shares indirectly (by trust) at $55.17 ($218K), marked as a 10b5-1 plan trade. Holdings by trust down 9% to 37,994 shares. | SEC filing Filed Nov 10, 2025 |
37 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
Follow DXCM in the Insider Ledger app
Get the appA plain-English brief of insider purchases, 8-Ks and red flags at the companies you pick. No account needed.