DexCom, Inc. (DXCM) Insider Trading
Over the last 3 months, DXCM insiders made 0 open-market buys and 15 sales, a net sale of -$8.3M (SEC Form 4). Over the last 6 months, 778 institutions increased and 686 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
15
Net (3m)
-$8.3M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price +20.5%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 28, 2026 | Stern Sadieofficer: EVP Chief People & Culture Off | Sell | 2,565 | $88.37 |
| Aug 25, 2026 | Leach Jacob Stevendirector, officer: President, CEO, and Director | Tax | 1,451 | $92.34 |
| Aug 25, 2026 | Sylvain Jereme Mofficer: EVP, Chief Financal Officer | Tax | 1,451 | $92.34 |
| Aug 25, 2026 | Brown Michael Jonofficer: EVP Chief Legal Compliance Off | Tax | 1,451 | $92.34 |
| Aug 25, 2026 | Stern Sadieofficer: EVP Chief People & Culture Off | Tax | 1,451 | $92.34 |
| Aug 24, 2026 | SAYER KEVIN Rdirector, officer: Executive Chair | Sell | 19,308 | $89.71 |
| Aug 24, 2026 | SAYER KEVIN Rdirector, officer: Executive Chair | Sell | 7,351 | $90.78 |
| Aug 24, 2026 | SAYER KEVIN Rdirector, officer: Executive Chair | Sell | 97 | $91.41 |
| Aug 17, 2026 | Brown Michael Jonofficer: EVP Chief Legal Compliance Off | Sell | 1,700 | $91.93 |
| Aug 13, 2026 | Heller Bridgette Pdirector | Sell | 1,012 | $88.29 |
| Aug 4, 2026 | FOLETTA MARK Gdirector | Sell | 2,000 | $80.00 |
| Jul 21, 2026 | SAYER KEVIN Rdirector, officer: Executive Chair | Sell | 26,756 | $76.32 |
| Jul 16, 2026 | Brown Michael Jonofficer: EVP Chief Legal Compliance Off | Sell | 1,700 | $74.42 |
| Jul 7, 2026 | SAYER KEVIN Rdirector, officer: Executive Chair | Sell | 26,756 | $72.00 |
| Jun 17, 2026 | Brown Michael Jonofficer: EVP Chief Legal Compliance Off | Sell | 1,700 | $75.55 |
| Jun 17, 2026 | FOLETTA MARK Gdirector | Sell | 3,801 | $74.10 |
| Jun 17, 2026 | FOLETTA MARK Gdirector | Sell | 199 | $74.82 |
| Jun 5, 2026 | Coleman Jonofficer: EVP, Chief Commercial Officer | Sell | 4,912 | $73.00 |
| Jun 5, 2026 | Coleman Jonofficer: EVP, Chief Commercial Officer | Sell | 4,911 | $74.13 |
| Jun 1, 2026 | Ashley Euan A.director | Grant | 5,565 | — |
| Jun 1, 2026 | AUGUSTINOS NICHOLASdirector | Grant | 5,575 | — |
| Jun 1, 2026 | Collins Richard Alexanderdirector | Grant | 5,605 | — |
| Jun 1, 2026 | Malady Kyledirector | Grant | 5,575 | — |
| Jun 1, 2026 | Osterloh Albert Frederick IVdirector | Grant | 1,630 | — |
| Jun 1, 2026 | GALA RENEE Ddirector | Grant | 5,605 | — |
| Jun 1, 2026 | Heller Bridgette Pdirector | Grant | 5,575 | — |
| Jun 1, 2026 | Driscoll Rimmadirector | Grant | 5,605 | — |
| Jun 1, 2026 | ALTMAN STEVEN Rdirector | Grant | 5,565 | — |
| Jun 1, 2026 | FOLETTA MARK Gdirector | Grant | 6,331 | — |
| May 27, 2026 | Leach Jacob Stevendirector, officer: President, CEO, and Director | Tax | 1,451 | $71.90 |
Source: DXCM SEC Form 4 filings, latest Aug 28, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their DXCM positions over the last 6 months (SEC Form 13F).
Increased
778
New positions
272
Reduced
686
Sold out
105
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Reduced | 39.0M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 38.2M | Aug 7, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 25.2M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 25.0M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 19.7M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 19.2M | May 8, 2026 |
| STATE STREET CORP | Increased | 18.4M | Aug 7, 2026 |
| STATE STREET CORP | Reduced | 17.9M | May 15, 2026 |
| BAILLIE GIFFORD & CO | Increased | 15.6M | May 8, 2026 |
| Invesco Ltd. | Increased | 15.3M | Aug 14, 2026 |
| BAILLIE GIFFORD & CO | Reduced | 14.8M | Aug 6, 2026 |
| ALLIANCEBERNSTEIN L.P. | Increased | 12.9M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 12.4M | Aug 12, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 12.3M | May 15, 2026 |
| ALLIANCEBERNSTEIN L.P. | Reduced | 11.7M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.