Stock Scorer

DexCom Inc (DXCM) · Insider trading

What DexCom's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months
$1.00M
1 insider, 2 trades
Sold, 12 months
$12.62M
9 insiders, 100% under a plan
Net, 12 months
−$11.62M
bought less sold
Latest filing
2026-09-30
filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

2024-11: $582,560 sold 2024-12: $223,845 sold 2025-01: $3.59M sold 2025-01 2025-03: $6.37M sold 2025-05: $1.37M sold 2025-06: $912,611 sold 2025-07: $407,699 sold 2025-07 2025-08: $263,051 sold 2025-09: $529,010 sold 2025-11: $1.00M bought 2025-11: $448,177 sold 2026-01 2026-02: $68,826 sold 2026-03: $110,245 sold 2026-04: $107,168 sold 2026-05: $2.09M sold 2026-06: $1.15M sold 2026-07: $4.25M sold 2026-07 2026-08: $3.05M sold 2026-09: $1.35M sold
Bought Sold Largest month: $6.37M

Who traded, two years

InsiderBoughtSold TradesLast tradeHolds after
Sayer Kevin RDirector, Executive Chair – $13.49M 8 2026-08-20 309,662
Brown Michael JonEVP Chief Legal Compliance Off – $2.76M 12 2026-09-15 99,885
Stern SadieEVP Chief People & Culture Off – $2.67M 10 2026-09-28 123,478
Sylvain Jereme MEVP, Chief Financal Officer – $2.53M 9 2026-09-10 146,828
Leach Jacob StevenPresident & COO $1.00M $1.28M 5 2025-11-10 329,197
Foletta Mark GDirector – $1.31M 9 2026-08-03 –
Augustinos NicholasDirector – $1.20M 4 2026-09-15 –
Coleman JonEVP, Chief Commercial Officer – $722,628 2 2026-06-04 95,450
Collins Richard AlexanderDirector – $389,410 2 2025-11-14 –
Heller Bridgette PDirector – $379,299 6 2026-08-12 29,570
Dolan Matthew VincentEVP, Strategy & Corporate Dev – $102,815 1 2025-01-29 42,044
Malady KyleDirector – $53,934 1 2025-09-05 22,667

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

DateInsiderTradeShares PriceValueHolds afterFiling
2026-09-28 Stern SadieEVP Chief People & Culture Off Saleplan 2,565 86.15 $220,975 123,478 Form 4
2026-09-15 Brown Michael JonEVP Chief Legal Compliance Off Saleplan 1,700 84.04 $142,868 99,885 Form 4
2026-09-15 Augustinos NicholasDirector Saleplanindirect 6,539 84.04 $549,538 29,293 Form 4
2026-09-14 Augustinos NicholasDirector Saleplanindirect 1,550 84.02 $130,231 35,832 Form 4
2026-09-10 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 3,638 83.27 $302,936 146,828 Form 4
2026-08-27 Stern SadieEVP Chief People & Culture Off Saleplan 2,565 88.37 $226,669 126,043 Form 4
2026-08-20 Sayer Kevin RDirector, Executive Chair Saleplan 19,308 89.71 $1.73M 309,662 Form 4
2026-08-20 Sayer Kevin RDirector, Executive Chair Saleplan 7,351 90.78 $667,324 302,311 Form 4
2026-08-20 Sayer Kevin RDirector, Executive Chair Saleplan 97 91.41 $8,867 302,214 Form 4
2026-08-14 Brown Michael JonEVP Chief Legal Compliance Off Saleplan 1,700 91.93 $156,281 102,953 Form 4
2026-08-12 Heller Bridgette PDirector Saleplan 1,012 88.29 $89,349 29,570 Form 4
2026-08-03 Foletta Mark GDirector Saleplanindirect 2,000 85.32 $170,640 48,852 Form 4
2026-07-31 Foletta Mark GDirector Saleplanindirect 2,000 80.00 $160,000 50,852 Form 4
2026-07-20 Sayer Kevin RDirector, Executive Chair Saleplan 26,756 76.32 $2.04M 328,970 Form 4
2026-07-15 Brown Michael JonEVP Chief Legal Compliance Off Saleplan 1,700 74.42 $126,514 104,653 Form 4
2026-07-06 Sayer Kevin RDirector, Executive Chair Saleplan 26,756 72.00 $1.93M 355,726 Form 4
2026-06-15 Foletta Mark GDirector Saleplanindirect 3,801 74.10 $281,654 53,051 Form 4
2026-06-15 Foletta Mark GDirector Saleplanindirect 199 74.82 $14,889 52,852 Form 4
2026-06-15 Brown Michael JonEVP Chief Legal Compliance Off Saleplan 1,700 75.55 $128,435 106,353 Form 4
2026-06-04 Coleman JonEVP, Chief Commercial Officer Saleplan 4,911 74.13 $364,052 95,450 Form 4
2026-06-03 Coleman JonEVP, Chief Commercial Officer Saleplan 4,912 73.00 $358,576 100,361 Form 4
2026-05-21 Sayer Kevin RDirector, Executive Chair Saleplan 26,759 72.00 $1.93M 382,482 Form 4
2026-05-15 Brown Michael JonEVP, Chief Legal Officer Saleplan 1,700 59.91 $101,847 109,504 Form 4
2026-05-12 Heller Bridgette PDirector Saleplan 1,012 60.01 $60,730 25,007 Form 4
2026-04-15 Brown Michael JonEVP, Chief Legal Officer Saleplan 1,700 63.04 $107,168 111,204 Form 4
2026-03-16 Brown Michael JonEVP, Chief Legal Officer Saleplan 1,700 64.85 $110,245 112,904 Form 4
2026-02-12 Heller Bridgette PDirector Saleplan 1,012 68.01 $68,826 26,019 Form 4
2025-11-14 Collins Richard AlexanderDirector Saleplanindirect 2,906 59.05 $171,599 35,088 Form 4
2025-11-12 Heller Bridgette PDirector Saleplan 1,012 58.07 $58,767 27,031 Form 4
2025-11-10 Collins Richard AlexanderDirector Saleplanindirect 3,948 55.17 $217,811 37,994 Form 4
2025-11-10 Leach Jacob StevenPresident & COO Buy 15,700 54.98 $863,186 329,197 Form 4
2025-11-10 Leach Jacob StevenPresident & COO Buy 2,500 55.43 $138,575 331,697 Form 4
2025-09-05 Malady KyleDirector Saleplan 667 80.86 $53,934 22,667 Form 4
2025-09-04 Stern SadieEVP, Chief HR Officer Saleplan 1,466 80.00 $117,280 105,223 Form 4
2025-09-02 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 4,824 74.17 $357,796 118,657 Form 4
2025-08-15 Foletta Mark GDirector Saleplanindirect 2,555 81.02 $207,006 51,316 Form 4
2025-08-15 Foletta Mark GDirector Saleplanindirect 195 81.54 $15,900 51,121 Form 4
2025-08-15 Brown Michael JonEVP, Chief Legal Officer Saleplan 500 80.29 $40,145 94,102 Form 4
2025-07-28 Stern SadieEVP, Chief HR Officer Saleplan 1,466 88.99 $130,459 106,689 Form 4
2025-07-15 Brown Michael JonEVP, Chief Legal Officer Saleplan 500 86.03 $43,015 94,602 Form 4
29 more
2025-07-15 Foletta Mark GDirector Saleplanindirect 2,742 85.17 $233,536 53,879 Form 4
2025-07-15 Foletta Mark GDirector Saleplanindirect 8 86.03 $688 53,871 Form 4
2025-06-26 Stern SadieEVP, Chief HR Officer Saleplan 1,466 85.06 $124,698 108,155 Form 4
2025-06-16 Brown Michael JonEVP, Chief Legal Officer Saleplan 500 82.80 $41,400 95,102 Form 4
2025-06-16 Foletta Mark GDirector Saleplanindirect 2,750 83.13 $228,608 56,621 Form 4
2025-06-16 Augustinos NicholasDirector Saleplanindirect 3,672 82.80 $304,042 33,411 Form 4
2025-06-13 Augustinos NicholasDirector Saleplanindirect 2,618 81.69 $213,864 37,083 Form 4
2025-05-27 Stern SadieEVP, Chief HR Officer Saleplan 6,184 85.11 $526,320 109,621 Form 4
2025-05-23 Brown Michael JonEVP, Chief Legal Officer Saleplan 10,000 84.28 $842,800 95,602 Form 4
2025-03-17 Heller Bridgette PDirector Saleplan 352 70.33 $24,756 22,997 Form 4
2025-03-12 Sayer Kevin RDirector, Chairman, CEO & President Sale 32,498 70.38 $2.29M 372,029 Form 4
2025-03-12 Stern SadieEVP, Chief HR Officer Sale 11,176 70.38 $786,567 115,805 Form 4
2025-03-12 Sylvain Jereme MEVP, Chief Financal Officer Sale 12,001 70.38 $844,630 123,481 Form 4
2025-03-12 Brown Michael JonEVP, Chief Legal Officer Sale 13,000 70.38 $914,940 105,602 Form 4
2025-03-12 Leach Jacob StevenEVP, Chief Operating Officer Sale 14,076 70.38 $990,669 313,497 Form 4
2025-03-10 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 2,670 73.22 $195,497 139,812 Form 4
2025-03-10 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 3,203 74.04 $237,150 136,609 Form 4
2025-03-10 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 1,127 74.70 $84,187 135,482 Form 4
2025-01-29 Sayer Kevin RDirector, Chairman, CEO & President Sale 33,359 86.91 $2.90M 319,037 Form 4
2025-01-29 Leach Jacob StevenEVP, Chief Operating Officer Sale 2,634 86.91 $228,921 268,644 Form 4
2025-01-29 Stern SadieEVP, Chief HR Officer Sale 2,093 86.91 $181,903 74,261 Form 4
2025-01-29 Dolan Matthew VincentEVP, Strategy & Corporate Dev Sale 1,183 86.91 $102,815 42,044 Form 4
2025-01-29 Sylvain Jereme MEVP, Chief Financal Officer Sale 2,090 86.91 $181,642 83,526 Form 4
2024-12-16 Heller Bridgette PDirector Saleplan 1,000 76.87 $76,870 23,349 Form 4
2024-12-16 Leach Jacob StevenEVP, Chief Operating Officer Sale 744 76.87 $57,191 264,171 Form 4
2024-12-16 Sylvain Jereme MEVP, Chief Financal Officer Sale 744 76.87 $57,191 80,030 Form 4
2024-12-16 Stern SadieEVP, Chief HR Officer Sale 424 76.87 $32,593 70,768 Form 4
2024-11-20 Stern SadieEVP, Chief HR Officer Sale 4,259 74.73 $318,275 71,192 Form 4
2024-11-15 Sylvain Jereme MEVP, Chief Financal Officer Saleplan 3,500 75.51 $264,285 80,774 Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

48 × grant or award21 × gift19 × shares withheld for tax
Show them
DateInsiderWhatShares PriceHolds afterFiling
2026-09-10 Boehnlein Glenn SDirector Grant or award A +5,841 – 5,841 Form 4
2026-08-22 Stern SadieEVP Chief People & Culture Off Shares withheld for tax F −1,451 92.34 128,608 Form 4
2026-08-22 Brown Michael JonEVP Chief Legal Compliance Off Shares withheld for tax F −1,451 92.34 101,502 Form 4
2026-08-22 Sylvain Jereme MEVP, Chief Financal Officer Shares withheld for tax F −1,451 92.34 150,390 Form 4
2026-08-22 Leach Jacob StevenDirector, President, CEO, and Director Shares withheld for tax F −1,451 92.34 418,908 Form 4
2026-08-12 Augustinos NicholasDirector Gift G −1,075 – 37,382 Form 4
2026-05-28 Gala Renee DDirector Grant or award A +5,605 – 12,486 Form 4
2026-05-28 Collins Richard AlexanderDirector Grant or award A +5,605 – 5,605 Form 4
2026-05-28 Ashley Euan A.Director Grant or award A +5,565 – 12,731 Form 4
2026-05-28 Driscoll RimmaDirector Grant or award A +5,605 – 17,319 Form 4
2026-05-28 Osterloh Albert Frederick IVDirector Grant or award A +1,630 – 8,691 Form 4
2026-05-28 Heller Bridgette PDirector Grant or award A +5,575 – 30,582 Form 4
2026-05-28 Foletta Mark GDirector Grant or award A +6,331 – 6,331 Form 4
2026-05-28 Augustinos NicholasDirector Grant or award A +5,575 – 5,575 Form 4
2026-05-28 Malady KyleDirector Grant or award A +5,575 – 28,242 Form 4
2026-05-28 Altman Steven RDirector Grant or award A +5,565 – 5,565 Form 4
2026-05-22 Coleman JonEVP, Chief Commercial Officer Shares withheld for tax F −7,362 71.90 105,273 Form 4
2026-05-22 Stern SadieEVP Chief People & Culture Off Shares withheld for tax F −1,451 71.90 130,059 Form 4
2026-05-22 Sylvain Jereme MEVP, Chief Financal Officer Shares withheld for tax F −1,451 71.90 151,841 Form 4
2026-05-22 Brown Michael JonEVP Chief Legal Compliance Off Shares withheld for tax F −1,451 71.90 108,053 Form 4
2026-05-22 Leach Jacob StevenDirector, President, CEO, and Director Shares withheld for tax F −1,451 71.90 420,359 Form 4
2026-05-08 Altman Steven RDirector Gift G −5,037 – 0 Form 4
2026-05-08 Altman Steven RDirector Gift G +5,037 – 63,667 Form 4
2026-05-08 Foletta Mark GDirector Gift G −5,731 – 0 Form 4
2026-05-08 Foletta Mark GDirector Gift G +5,731 – 56,852 Form 4
2026-05-08 Collins Richard AlexanderDirector Gift G −5,074 – 0 Form 4
2026-05-08 Collins Richard AlexanderDirector Gift G +5,074 – 40,162 Form 4
2026-05-08 Augustinos NicholasDirector Gift G −5,046 – 0 Form 4
2026-05-08 Augustinos NicholasDirector Gift G +5,046 – 38,457 Form 4
2026-03-08 Coleman JonEVP, Chief Commercial Officer Grant or award A +43,897 – 112,635 Form 4
2026-03-08 Leach Jacob StevenDirector, President, CEO, and Director Grant or award A +104,516 – 441,567 Form 4
2026-03-08 Leach Jacob StevenDirector, President, CEO, and Director Shares withheld for tax F −19,757 68.10 421,810 Form 4
2026-03-08 Stern SadieEVP, Chief HR Officer Grant or award A +39,019 – 148,709 Form 4
2026-03-08 Stern SadieEVP, Chief HR Officer Shares withheld for tax F −17,199 68.10 131,510 Form 4
2026-03-08 Brown Michael JonEVP, Chief Legal Officer Grant or award A +39,019 – 137,929 Form 4
2026-03-08 Brown Michael JonEVP, Chief Legal Officer Shares withheld for tax F −23,325 68.10 114,604 Form 4
2026-03-08 Sylvain Jereme MEVP, Chief Financal Officer Grant or award A +48,774 – 172,242 Form 4
2026-03-08 Sylvain Jereme MEVP, Chief Financal Officer Shares withheld for tax F −18,950 68.10 153,292 Form 4
2026-03-08 Sayer Kevin RDirector, Executive Chair Grant or award A +32,749 – 441,739 Form 4
2026-03-08 Sayer Kevin RDirector, Executive Chair Shares withheld for tax F −32,498 68.10 409,241 Form 4
2026-02-26 Osterloh Albert Frederick IVDirector Grant or award A +7,061 – 7,061 Form 4
2026-01-29 Sayer Kevin RDirector, Executive Chair Grant or award A +71,218 – 443,247 Form 4
2026-01-29 Sayer Kevin RDirector, Executive Chair Shares withheld for tax F −34,257 73.36 408,990 Form 4
2026-01-29 Brown Michael JonEVP, Chief Legal Officer Grant or award A +7,123 – 101,308 Form 4
2026-01-29 Brown Michael JonEVP, Chief Legal Officer Shares withheld for tax F −2,653 73.36 98,655 Form 4
2026-01-29 Sylvain Jereme MEVP, Chief Financal Officer Grant or award A +7,123 – 125,859 Form 4
2026-01-29 Sylvain Jereme MEVP, Chief Financal Officer Shares withheld for tax F −2,652 73.36 123,207 Form 4
2026-01-29 Stern SadieEVP, Chief HR Officer Grant or award A +7,123 – 112,346 Form 4
2026-01-29 Stern SadieEVP, Chief HR Officer Shares withheld for tax F −2,656 73.36 109,690 Form 4
2026-01-29 Leach Jacob StevenDirector, President, CEO, and Director Grant or award A +8,310 – 340,109 Form 4
2026-01-29 Leach Jacob StevenDirector, President, CEO, and Director Shares withheld for tax F −3,058 73.36 337,051 Form 4
2025-10-24 Ashley Euan A.Director Grant or award A +7,166 – 7,166 Form 4
2025-05-22 Coleman JonEVP, Chief Commercial Officer Grant or award A +68,738 – 68,738 Form 4
2025-05-08 Gala Renee DDirector Grant or award A +1,161 – 6,881 Form 4/A
2025-05-08 Topol EricDirector Gift G −2,618 – 0 Form 4
2025-05-08 Topol EricDirector Gift G +2,618 – 380,545 Form 4
2025-05-08 Altman Steven RDirector Gift G −2,613 – 0 Form 4
2025-05-08 Altman Steven RDirector Gift G +2,613 – 58,630 Form 4
2025-05-08 Altman Steven RDirector Grant or award A +5,037 – 5,037 Form 4
2025-05-08 Collins Richard AlexanderDirector Gift G −2,632 – 0 Form 4
2025-05-08 Collins Richard AlexanderDirector Gift G +2,632 – 41,942 Form 4
2025-05-08 Collins Richard AlexanderDirector Grant or award A +5,074 – 5,074 Form 4
2025-05-08 Foletta Mark GDirector Gift G −2,973 – 0 Form 4
2025-05-08 Foletta Mark GDirector Gift G +2,973 – 59,371 Form 4
2025-05-08 Foletta Mark GDirector Grant or award A +5,731 – 5,731 Form 4
2025-05-08 Augustinos NicholasDirector Gift G −2,618 – 0 Form 4
2025-05-08 Augustinos NicholasDirector Gift G +2,618 – 39,701 Form 4
2025-05-08 Augustinos NicholasDirector Grant or award A +5,046 – 5,046 Form 4
2025-05-08 Heller Bridgette PDirector Grant or award A +5,046 – 28,043 Form 4
2025-05-08 Dahut Karen MDirector Gift G −2,613 – 0 Form 4
2025-05-08 Dahut Karen MDirector Gift G +2,613 – 17,779 Form 4
2025-05-08 Malady KyleDirector Grant or award A +5,192 – 23,334 Form 4
2025-05-08 Driscoll RimmaDirector Grant or award A +5,074 – 11,714 Form 4
2025-03-08 Sylvain Jereme MEVP, Chief Financal Officer Grant or award A +35,906 – 119,684 Form 4
2025-03-08 Sylvain Jereme MEVP, Chief Financal Officer Grant or award A +22,798 – 142,482 Form 4
2025-03-08 Brown Michael JonEVP, Chief Legal Officer Grant or award A +29,922 – 95,804 Form 4
2025-03-08 Brown Michael JonEVP, Chief Legal Officer Grant or award A +22,798 – 118,602 Form 4
2025-03-08 Stern SadieEVP, Chief HR Officer Grant or award A +29,922 – 104,183 Form 4
2025-03-08 Stern SadieEVP, Chief HR Officer Grant or award A +22,798 – 126,981 Form 4
2025-03-08 Leach Jacob StevenEVP, Chief Operating Officer Grant or award A +35,906 – 304,775 Form 4
2025-03-08 Leach Jacob StevenEVP, Chief Operating Officer Grant or award A +22,798 – 327,573 Form 4
2025-03-08 Sayer Kevin RDirector, Chairman, CEO & President Grant or award A +85,490 – 404,527 Form 4
2025-03-06 Gala Renee DDirector Grant or award A +5,720 – 5,720 Form 4
2025-01-28 Sayer Kevin RDirector, Chairman, CEO & President Grant or award A +68,503 – 352,396 Form 4
2025-01-28 Leach Jacob StevenEVP, Chief Operating Officer Grant or award A +7,107 – 271,278 Form 4
2025-01-28 Stern SadieEVP, Chief HR Officer Grant or award A +5,586 – 76,354 Form 4
2025-01-28 Dolan Matthew VincentEVP, Strategy & Corporate Dev Grant or award A +3,048 – 43,227 Form 4
2025-01-28 Sylvain Jereme MEVP, Chief Financal Officer Grant or award A +5,586 – 85,616 Form 4

How to read it

Buy, sale
Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan
A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after
The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value
Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

DexCom's scores and multiples ›