Brown Michael Jon
Officer · DXCM
As of 2026-09-16, Brown Michael Jon has 20 Form 4 transactions on record across 1 company — 13 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $8.7M
- Indirect $0
| DXCM | direct | 99,885 sh | $8.7M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | DXCM | Sale | 1,700 @ $84.04 | $143K | −1.7% of holding | 99,885 | Form 4 |
| 2026-08-14 | DXCM | Sale | 1,700 @ $91.93 | $156K | −1.6% of holding | 102,953 | Form 4 |
| 2026-07-15 | DXCM | Sale | 1,700 @ $74.42 | $127K | −1.6% of holding | 104,653 | Form 4 |
| 2026-06-15 | DXCM | Sale | 1,700 @ $75.55 | $128K | −1.6% of holding | 106,353 | Form 4 |
| 2026-05-15 | DXCM | Sale | 1,700 @ $59.91 | $102K | −1.5% of holding | 109,504 | Form 4 |
| 2026-04-15 | DXCM | Sale | 1,700 @ $63.04 | $107K | −1.5% of holding | 111,204 | Form 4 |
| 2026-03-16 | DXCM | Sale | 1,700 @ $64.85 | $110K | −1.5% of holding | 112,904 | Form 4 |
| 2025-08-15 | DXCM | Sale | 500 @ $80.29 | $40K | −0.5% of holding | 94,102 | Form 4 |
| 2025-07-15 | DXCM | Sale | 500 @ $86.03 | $43K | −0.5% of holding | 94,602 | Form 4 |
| 2025-06-16 | DXCM | Sale | 500 @ $82.80 | $41K | −0.5% of holding | 95,102 | Form 4 |
| 2025-05-23 | DXCM | Sale | 10,000 @ $84.28 | $843K | −9.5% of holding | 95,602 | Form 4 |
| 2025-03-12 | DXCM | Sale | 13,000 @ $70.38 | $915K | −11.0% of holding | 105,602 | Form 4 |
8 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-08-22 | DXCM | Withheld for tax | 1,451 | 101,502 | Form 4 |
| 2026-05-22 | DXCM | Withheld for tax | 1,451 | 108,053 | Form 4 |
| 2026-03-08 | DXCM | Withheld for tax | 23,325 | 114,604 | Form 4 |
| 2026-03-08 | DXCM | Award / grant | 39,019 | 137,929 | Form 4 |
| 2026-01-29 | DXCM | Withheld for tax | 2,653 | 98,655 | Form 4 |
| 2026-01-29 | DXCM | Award / grant | 7,123 | 101,308 | Form 4 |
| 2025-03-08 | DXCM | Award / grant | 22,798 | 118,602 | Form 4 |
| 2025-03-08 | DXCM | Award / grant | 29,922 | 95,804 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.