Michael Jon Brown
CIK 1899922 · EVP Chief Legal Compliance Off · last filed 2026-11-10
Michael Jon Brown is an EVP Chief Legal Compliance Off who has filed 51 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing shows the insider had shares withheld for taxes covering $115.2K of DXCM on Nov 10, 2026. Across all open-market trades the lifetime net is −$5.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $8.1M across reported positions. 19 Form 144 notices of planned sales are also on file; the latest, for DXCM on Oct 15, 2026, lists the filer as an officer.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
DXCM price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
SAN DIEGO, CA 92121
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| DXCM | EVP Chief Legal Compliance Off | 96,734 | $83.58 | $8.09M | -$5.60M | 32 | 2026-11-10 |
Recent Filings
51 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-11-10 | DXCM | Tax (F) | −1,451 | -$115.2K | EDGAR |
| 2026-10-19 | DXCM | Sell (S) | −1,700 | -$145.3K | EDGAR |
| 2026-10-15 | DXCM | Notice (144) Officer · Planned Oct 15, 2026 · 10b5-1 plan Sold: Form 4 filed Oct 19, 2026 |
−1,700 | -$145.3K | EDGAR |
| 2026-09-16 | DXCM | Sell (S) | −1,700 | -$142.9K | EDGAR |
| 2026-09-15 | DXCM | Notice (144) Officer · Planned Sep 15, 2026 · 10b5-1 plan Sold: Form 4 filed Sep 16, 2026 |
−1,700 | -$142.9K | EDGAR |
| 2026-08-25 | DXCM | Tax (F) | −1,451 | -$134.0K | EDGAR |
| 2026-08-17 | DXCM | Sell (S) | −1,700 | -$156.3K | EDGAR |
| 2026-08-14 | DXCM | Notice (144) Officer · Planned Aug 14, 2026 · 10b5-1 plan Sold: Form 4 filed Aug 17, 2026 |
−1,700 | -$156.3K | EDGAR |
| 2026-07-16 | DXCM | Sell (S) | −1,700 | -$126.5K | EDGAR |
| 2026-07-15 | DXCM | Notice (144) Officer · Planned Jul 15, 2026 · 10b5-1 plan Sold: Form 4 filed Jul 16, 2026 |
−1,700 | -$126.5K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment, and an amended or cancelled notice is not listed. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes. Someone who is no longer an officer or director (or never was) files no Form 4, so for them a sale shows up only on a later notice, which lists the seller's sales from the 3 months before it. "No sale on file" means neither record shows one; a dash in Net $ means the value filed on the notice doesn't fit the stock's price (likely a typo).