Reporting owner · CIK 0001899922
Brown Michael Jon
SEC Form 4 history across 1 companies, 4 transactions and 4 filings.
ECLCOEVP Chief Legal Compliance OffDEXCOM INC
Open-market transaction mix0% buys0 buys · 3 sales
Available history · May 22, 2026 – Oct 15, 2026
Latest insider transactions
Form 4 filings from available history.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
DXCMDEXCOM INC | Brown Michael JonECLCO | S · sale10b5-1 detectedSEC filing ↗ | -$145kView disclosure → | |
DXCMDEXCOM INC | Brown Michael JonECLCO | S · sale10b5-1 detectedSEC filing ↗ | -$142kView disclosure → | |
DXCMDEXCOM INC | Brown Michael JonECLCO | S · sale10b5-1 detectedSEC filing ↗ | -$156kView disclosure → | |
DXCMDEXCOM INC | Brown Michael JonECLCO | F · withholdingSEC filing ↗ | -$104kView disclosure → |
Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
sale at DEXCOM INC on Oct 15, 2026 valued at $145,316.
Review SEC filingLatest buy
No open-market insider purchase is available.
Monthly open-market activity
Last 4 reported months · purchases and sales
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| May 2026 | 0 | 0 | $0.00 | $0.00 | $0.00 |
| Aug 2026 | 0 | 1 | $0.00 | $156,281.00 | -$156,281.00 |
| Sep 2026 | 0 | 1 | $0.00 | $142,868.00 | -$142,868.00 |
| Oct 2026 | 0 | 1 | $0.00 | $145,316.00 | -$145,316.00 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size$148.2K
Median P/S size$145.3K
Direct4
Indirect0
Oct 15, 2026sale
Filing-only signals
Deterministic matches in this insider's history
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
No open-market purchases in available history
A 90-day purchase return requires an open-market buy. No eligible purchases are recorded in this history.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
4 observations · May 22, 2026 – Oct 15, 2026. Window ends at the latest available report, not today.
Selected observation · Oct 15, 202698,185 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| May 22, 2026 | 108,053 | May 27, 2026 | View transaction |
| Aug 14, 2026 | 102,953 | Aug 17, 2026 | View transaction |
| Sep 15, 2026 | 99,885 | Sep 16, 2026 | View transaction |
| Oct 15, 2026 | 98,185 | Oct 19, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Brown Michael Jon Insider Activity FAQ
SEC Form 4 context
Who is Brown Michael Jon?
Brown Michael Jon is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001899922.
Which companies has Brown Michael Jon reported transactions for?
DEXCOM INC
When was Brown Michael Jon's latest insider buy?
No open-market insider purchase is available for this period.
When was Brown Michael Jon's latest insider sale?
sale at DEXCOM INC on Oct 15, 2026 valued at $145,316.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.