Nicholas Augustinos
CIK 1238485 · last filed 2026-09-16
Nicholas Augustinos is a corporate insider who has filed 43 SEC Form 4 insider transactions across 1 company since 2009. The most recent filing shows the insider sold $679.8K of DXCM on Sep 16, 2026. Across all open-market trades the lifetime net is −$13.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.5M across reported positions. 4 Form 144 notices of planned sales are also on file; the latest, for DXCM on Sep 15, 2026, lists the filer as a director.
"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 FRANCISCO, CA 94114
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| DXCM | Director | 41,407 | $83.58 | $3.46M | -$13.00M | 39 | 2026-09-16 |
Holdings By Holder
| Symbol | Holder | Shares | Share of Total | Reported |
|---|---|---|---|---|
| DXCM | Direct | 5,575 | 13.5% | 2026-09-16 |
| Kirschner/Augustinos Revocable Trust by Trust |
35,832 | 86.5% | 2026-09-16 | |
| Total | 41,407 |
Recent Filings
43 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-16 | DXCM | Sell (S) | −8,089 | -$679.8K | EDGAR |
| 2026-09-15 | DXCM | Notice (144) Director · Planned Sep 15, 2026 · 10b5-1 plan Sold: Form 4 filed Sep 16, 2026 |
−6,539 | -$549.5K | EDGAR |
| 2026-09-14 | DXCM | Notice (144) Director · Planned Sep 14, 2026 · 10b5-1 plan Sold: Form 4 filed Sep 16, 2026 |
−1,550 | -$130.2K | EDGAR |
| 2026-08-13 | DXCM | Gift (G) | −1,075 | $0 | EDGAR |
| 2026-06-01 | DXCM | Grant (A) | +5,575 | $0 | EDGAR |
| 2026-05-11 | DXCM | Gift (G) | — | $0 | EDGAR |
| 2025-06-17 | DXCM | Sell (S) | −6,290 | -$517.9K | EDGAR |
| 2025-06-09 | DXCM | Notice (144) Director · Planned Jun 9, 2025 · 10b5-1 plan Sold: Form 4 filed Jun 17, 2025 |
−6,290 | -$546.7K | EDGAR |
| 2025-05-12 | DXCM | Mixed | +5,046 | $0 | EDGAR |
| 2024-05-24 | DXCM | Grant (A) | +2,618 | $0 | 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).