John Riolo - Net Worth and Insider Trading

John Riolo Net Worth

The estimated net worth of John Riolo is at least $9 Million dollars as of 2024-11-13. John Riolo is the VP of Quality Assurance of DexCom Inc and owns about 120,000 shares of DexCom Inc (DXCM) stock worth over $9 Million. Details can be seen in John Riolo's Latest Holdings Summary section.

Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that John Riolo has not made any transactions after 2007-07-30 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

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Transaction Summary of John Riolo

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John Riolo Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, John Riolo owns 1 companies in total, including DexCom Inc (DXCM) .

Click here to see the complete history of John Riolo’s form 4 insider trades.

Insider Ownership Summary of John Riolo

Ticker Comapny Transaction Date Type of Owner
DXCM DexCom Inc 2007-07-30 VP of Quality Assurance

John Riolo Latest Holdings Summary

John Riolo currently owns a total of 1 stock. John Riolo owns 120,000 shares of DexCom Inc (DXCM) as of July 30, 2007, with a value of $9 Million.

Latest Holdings of John Riolo

Ticker Comapny Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
DXCM DexCom Inc 2007-07-30 120,000 74.34 8,920,800

Holding Weightings of John Riolo


John Riolo Form 4 Trading Tracker

According to the SEC Form 4 filings, John Riolo has made a total of 0 transactions in DexCom Inc (DXCM) over the past 5 years. The most-recent trade in DexCom Inc is the sale of 0 shares on July 30, 2007, which brought John Riolo around $0.

Insider Trading History of John Riolo

No transactions are available. GuruFocus only tracks and displays the purchase and sale of non-derivative security in open market or private transactions from SEC filings with the transaction code of P or S.
Total 0
  • 1
Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as conversion of derivative security or exercise of options are not included. Insiders are limited to only officers and/or directors of the company.

John Riolo Trading Performance

Please note GuruFocus will not track the insiders’ transaction performance if he/she does not have buying transactions.

John Riolo Ownership Network

Ownership Network List of John Riolo

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Ownership Network Relation of John Riolo

Insider Network Chart

John Riolo Owned Company Details

What does DexCom Inc do?

Who are the key executives at DexCom Inc?

John Riolo is the VP of Quality Assurance of DexCom Inc. Other key executives at DexCom Inc include Chief Human Resources Officer Sadie Stern , SVP & Research & Development Jacob Steven Leach , and SVP & Finance & CAO Jereme M Sylvain .

DexCom Inc (DXCM) Insider Trades Summary

Over the past 18 months, John Riolo made no insider transaction in DexCom Inc (DXCM). Other recent insider transactions involving DexCom Inc (DXCM) include a net sale of 30,958 shares made by Sadie Stern , a net sale of 18,313 shares made by Micheal Jon Brown , and a net sale of 7,911 shares made by Steven Robert Pacelli .

In summary, during the past 3 months, insiders sold 3,604 shares of DexCom Inc (DXCM) in total and bought 0 shares, with a net sale of 3,604 shares. During the past 18 months, 316,886 shares of DexCom Inc (DXCM) were sold and 0 shares were bought by its insiders, resulting in a net sale of 316,886 shares.

DexCom Inc (DXCM)'s detailed insider trading history can be found in Insider Trading Tracker table.

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DexCom Inc Insider Transactions

No Available Data

John Riolo Mailing Address

Above is the net worth, insider trading, and ownership report for John Riolo. You might contact John Riolo via mailing address: C/o Dexcom, Inc., 5555 Oberlin Drive, San Diego Ca 92121.