Keith Grinstein - Net Worth and Insider Trading
Keith Grinstein Net Worth
The estimated net worth of Keith Grinstein is at least $4 Million dollars as of 2025-04-30. Keith Grinstein is the Director of F5 Inc and owns about 17,000 shares of F5 Inc (FFIV) stock worth over $4 Million. Details can be seen in Keith Grinstein'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 Keith Grinstein has not made any transactions after 2007-02-07 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Keith Grinstein
Keith Grinstein Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Keith Grinstein owns 2 companies in total, including F5 Inc (FFIV) , and TrueBlue Inc (TBI) .
Click here to see the complete history of Keith Grinstein’s form 4 insider trades.
Insider Ownership Summary of Keith Grinstein
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
FFIV | F5 Inc | 2007-02-07 | director |
TBI | TrueBlue Inc | 2004-11-16 | director |
Keith Grinstein Latest Holdings Summary
Keith Grinstein currently owns a total of 1 stock. Keith Grinstein owns 17,000 shares of F5 Inc (FFIV) as of February 7, 2007, with a value of $4 Million.
Keith Grinstein Form 4 Trading Tracker
According to the SEC Form 4 filings, Keith Grinstein has made a total of 0 transactions in F5 Inc (FFIV) over the past 5 years. The most-recent trade in F5 Inc is the sale of 10,000 shares on February 7, 2007, which brought Keith Grinstein around $365,000.
Insider Trading History of Keith Grinstein
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Keith Grinstein Trading Performance
Keith Grinstein Ownership Network
Ownership Network List of Keith Grinstein
Ownership Network Relation of Keith Grinstein

Keith Grinstein Owned Company Details
What does F5 Inc do?
Who are the key executives at F5 Inc?
Keith Grinstein is the director of F5 Inc. Other key executives at F5 Inc include director & President & CEO & Director Francois Locoh-donou , Interim General Counsel Scot Frazier Rogers , and EVP & Worldwide Sales Chad Michael Whalen .
F5 Inc (FFIV) Insider Trades Summary
Over the past 18 months, Keith Grinstein made no insider transaction in F5 Inc (FFIV). Other recent insider transactions involving F5 Inc (FFIV) include a net sale of 30,750 shares made by Francois Locoh-donou , a net sale of 9,100 shares made by Francis J. Pelzer , and a net sale of 16,256 shares made by Scot Frazier Rogers .
In summary, during the past 3 months, insiders sold 19,865 shares of F5 Inc (FFIV) in total and bought 0 shares, with a net sale of 19,865 shares. During the past 18 months, 93,697 shares of F5 Inc (FFIV) were sold and 0 shares were bought by its insiders, resulting in a net sale of 93,697 shares.
F5 Inc (FFIV)'s detailed insider trading history can be found in Insider Trading Tracker table.
F5 Inc Insider Transactions
Keith Grinstein Mailing Address
Above is the net worth, insider trading, and ownership report for Keith Grinstein. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Keith Grinstein's mailing address is: Rutherford Nj 07070.