Mark G Foletta insider trades: Dexcom (DXCM) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
and 5 more companies
Open-market buys and sales
60 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 3, 2026 | DXCM | ↓ Sell10b5-1 | 4,000 | $82.66 | $331K | by Trust | Aug 4, 2026 (1d) |
| Jun 15, 2026 | DXCM | ↓ Sell10b5-1 | 4,000 | $74.13 | $297K | by Trust | Jun 17, 2026 (2d) |
| Jun 15, 2026 | AMN | ↓ Sell | 3,681 | $31.07 | $114K | by Trust | Jun 17, 2026 (2d) |
| Aug 15, 2025 | DXCM | ↓ Sell10b5-1 | 2,750 | $81.06 | $223K | by Trust | Aug 18, 2025 (3d) |
| Jul 15, 2025 | DXCM | ↓ Sell10b5-1 | 2,750 | $85.17 | $234K | by Trust | Jul 17, 2025 (2d) |
| Jun 16, 2025 | DXCM | ↓ Sell10b5-1 | 2,750 | $83.13 | $229K | by Trust | Jun 18, 2025 (2d) |
| Jun 18, 2024 | DXCM | ↓ Sell10b5-1 | 6,000 | $117.00 | $702K | by Trust | Jun 20, 2024 (2d) |
| Feb 29, 2024 | AMN | ↑ Buy | 500 | $56.90 | $28K | Direct | Mar 1, 2024 (1d) |
| Apr 21, 2023 | AMN | ↓ Sell | 1,458 | $88.78 | $129K | Direct | Apr 25, 2023 (4d) |
| Apr 11, 2023 | AMN | ↓ Sell | 6,042 | $84.35 | $510K | Direct | Apr 13, 2023 (2d) |
| Dec 1, 2021 | DXCM | ↓ Sell10b5-1 | 500 | $562.83 | $281K | by Trust | Dec 2, 2021 (1d) |
| Nov 1, 2021 | DXCM | ↓ Sell10b5-1 | 500 | $626.32 | $313K | by Trust | Nov 2, 2021 (1d) |
| Oct 1, 2021 | DXCM | ↓ Sell10b5-1 | 500 | $543.09 | $272K | by Trust | Oct 5, 2021 (4d) |
| Jun 11, 2021 | AMN | ↓ Sell | 2,500 | $95.02 | $238K | Direct | Jun 15, 2021 (4d) |
| Nov 16, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $341.32 | $341K | by Trust | Nov 18, 2020 (2d) |
| Oct 15, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $396.82 | $397K | by Trust | Oct 19, 2020 (4d) |
| Sep 14, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $394.14 | $394K | by Trust | Sep 16, 2020 (2d) |
| Mar 3, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $277.08 | $277K | by Trust | Mar 4, 2020 (1d) |
| Feb 3, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $237.84 | $238K | by Trust | Feb 5, 2020 (2d) |
| Jan 3, 2020 | DXCM | ↓ Sell10b5-1 | 1,000 | $218.05 | $218K | by Trust | Jan 7, 2020 (4d) |
| Dec 3, 2019 | DXCM | ↓ Sell10b5-1 | 1,000 | $227.59 | $228K | by Trust | Dec 5, 2019 (2d) |
| May 28, 2019 | TOCA | ↑ Buy | 5,000 | $4.29 | $21K | Direct | May 29, 2019 (1d) |
| May 15, 2019 | DXCM | ↓ Sell10b5-1 | 1,000 | $121.89 | $122K | by Trust | May 17, 2019 (2d) |
| Apr 15, 2019 | DXCM | ↓ Sell10b5-1 | 1,000 | $118.98 | $119K | by Trust | Apr 17, 2019 (2d) |
| Mar 15, 2019 | DXCM | ↓ Sell10b5-1 | 1,000 | $150.28 | $150K | by Trust | Mar 19, 2019 (4d) |
| Feb 15, 2019 | DXCM | ↓ Sell10b5-1 | 1,000 | $148.72 | $149K | by Trust | Feb 20, 2019 (5d) |
| Aug 24, 2018 | DXCM | ↓ Sell | 1,000 | $137.50 | $138K | by Trust | Aug 28, 2018 (4d) |
| Nov 27, 2017 | DXCM | ↓ Sell | 2,500 | $54.95 | $137K | by Trust | Nov 29, 2017 (2d) |
| Nov 27, 2017 | AMN | ↓ Sell | 2,500 | $47.03 | $118K | Direct | Nov 28, 2017 (1d) |
| Jun 13, 2017 | AMN | ↓ Sell | 1,500 | $36.70 | $55K | Direct | Jun 14, 2017 (1d) |
| Apr 19, 2017 | TOCA | ↑ Buy | 5,000 | $10.00 | $50K | Direct | Apr 21, 2017 (2d) |
| Dec 15, 2016 | AMN | ↓ Sell | 1,800 | $37.81 | $68K | Direct | Dec 16, 2016 (1d) |
| Sep 7, 2016 | DXCM | ↓ Sell | 1,800 | $94.63 | $170K | Direct | Sep 9, 2016 (2d) |
| Aug 13, 2015 | RGLS | ↑ Buy | 10,000 | $7.64 | $76K | Direct | Aug 13, 2015 (0d) |
| Mar 1, 2012 | AMLN | ↓ Sell | 1,846 | $17.11 | $32K | Direct | Mar 2, 2012 (1d) |
| Feb 23, 2012 | AMLN | ↓ Sell | 5,638 | $17.03 | $96K | Direct | Feb 24, 2012 (1d) |
| Sep 28, 2007 | AMLN | ↓ Sell | 3,000 | $49.98 | $150K | Direct | Sep 28, 2007 (0d) |
| Aug 31, 2007 | AMLN | ↓ Sell | 3,000 | $48.86 | $147K | Direct | Aug 31, 2007 (0d) |
| Jul 31, 2007 | AMLN | ↓ Sell | 3,500 | $47.43 | $166K | Direct | Aug 1, 2007 (1d) |
| Jun 29, 2007 | AMLN | ↓ Sell | 2,500 | $41.38 | $103K | Direct | Jul 2, 2007 (3d) |
| May 31, 2007 | AMLN | ↓ Sell | 6,500 | $45.79 | $298K | Direct | Jun 1, 2007 (1d) |
| Apr 30, 2007 | AMLN | ↓ Sell | 2,500 | $42.32 | $106K | Direct | May 1, 2007 (1d) |
| Mar 30, 2007 | AMLN | ↓ Sell | 2,500 | $37.61 | $94K | Direct | Apr 3, 2007 (4d) |
| Feb 28, 2007 | AMLN | ↓ Sell | 2,500 | $38.82 | $97K | Direct | Mar 2, 2007 (2d) |
| Jan 31, 2007 | AMLN | ↓ Sell | 2,500 | $39.00 | $98K | Direct | Jan 31, 2007 (0d) |
| Dec 29, 2006 | AMLN | ↓ Sell | 2,500 | $35.89 | $90K | Direct | Jan 4, 2007 (6d) |
| Nov 30, 2006 | AMLN | ↓ Sell | 2,500 | $40.76 | $102K | Direct | Dec 4, 2006 (4d) |
| Oct 31, 2006 | AMLN | ↓ Sell | 2,500 | $43.91 | $110K | Direct | Nov 1, 2006 (1d) |
| Sep 15, 2006 | AMLN | ↓ Sell | 2,000 | $44.35 | $89K | Direct | Sep 18, 2006 (3d) |
| Aug 15, 2006 | AMLN | ↓ Sell | 2,000 | $41.76 | $84K | Direct | Aug 15, 2006 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other DXCM insiders
Open-market trades in the last 12 months
About Mark G Foletta's insider trades
Mark G Foletta is a director at Dexcom (DXCM). Since Oct 17, 2005, Mark has reported 4 open-market purchases worth $176K and 56 sales worth $10.0M on SEC Form 4. In the last 12 months: 3 sales ($742K).
20 sales (55% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (70 filings), option exercises (37 filings), other transactions (6 filings), gifts (5 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every DXCM insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.