Mark P Long - Net Worth and Insider Trading
Mark P Long Net Worth
The estimated net worth of Mark P Long is at least $10 Million dollars as of 2025-07-25. Mark P Long is the Pres WD Capital, CSO & CFO of Western Digital Corp and owns about 141,221 shares of Western Digital Corp (WDC) stock worth over $10 Million. Details can be seen in Mark P Long'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 Mark P Long has not made any transactions after 2019-03-12 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Mark P Long
Mark P Long Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Mark P Long owns 3 companies in total, including Prime Impact Acquisition I (PRIUF) , Western Digital Corp (WDC) , and Prime Impact Acquisition I (PRIAF) .
Click here to see the complete history of Mark P Long’s form 4 insider trades.
Insider Ownership Summary of Mark P Long
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
PRIUF | Prime Impact Acquisition I | 2020-09-09 | director & Co-Chief Exec. Officer and CFO |
WDC | Western Digital Corp | 2019-03-12 | EVP & Corporate Development |
PRIAF | Prime Impact Acquisition I | 2020-09-09 | director & Co-Chief Exec. Officer and CFO |
Mark P Long Latest Holdings Summary
Mark P Long currently owns a total of 1 stock. Mark P Long owns 141,221 shares of Western Digital Corp (WDC) as of March 12, 2019, with a value of $10 Million.
Latest Holdings of Mark P Long
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
WDC | Western Digital Corp | 2019-03-12 | 141,221 | 69.31 | 9,787,321 |
Holding Weightings of Mark P Long
Mark P Long Form 4 Trading Tracker
According to the SEC Form 4 filings, Mark P Long has made a total of 0 transactions in Western Digital Corp (WDC) over the past 5 years. The most-recent trade in Western Digital Corp is the sale of 17,623 shares on March 12, 2019, which brought Mark P Long around $881,150.
Insider Trading History of Mark P Long
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Mark P Long Trading Performance
Mark P Long Ownership Network
Ownership Network List of Mark P Long
Ownership Network Relation of Mark P Long

Mark P Long Owned Company Details
What does Prime Impact Acquisition I do?
Who are the key executives at Prime Impact Acquisition I?
Mark P Long is the director & Co-Chief Exec. Officer and CFO of Prime Impact Acquisition I. Other key executives at Prime Impact Acquisition I include 10 percent owner Frank Brosens , 10 percent owner Taconic Capital Advisors Uk Llp , and 10 percent owner Taconic Capital Advisors Lp .
Prime Impact Acquisition I (PRIUF) Insider Trades Summary
In summary, during the past 3 months, insiders sold 0 shares of Prime Impact Acquisition I (PRIUF) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Prime Impact Acquisition I (PRIUF) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.
Prime Impact Acquisition I (PRIUF)'s detailed insider trading history can be found in Insider Trading Tracker table.
Prime Impact Acquisition I Insider Transactions
Mark P Long Mailing Address
Above is the net worth, insider trading, and ownership report for Mark P Long. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Mark P Long's mailing address is: San Jose Ca 95119.