William S Hayes - Net Worth and Insider Trading
William S Hayes Net Worth
The estimated net worth of William S Hayes is at least $2 Million dollars as of 2025-05-03. William S Hayes is the SVP, Government Affairs of Kosmos Energy Ltd and owns about 1,204,177 shares of Kosmos Energy Ltd (KOS) stock worth over $2 Million. Details can be seen in William S Hayes'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 William S Hayes has not made any transactions after 2014-09-02 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of William S Hayes
William S Hayes Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, William S Hayes owns 1 companies in total, including Kosmos Energy Ltd (KOS) .
Click here to see the complete history of William S Hayes’s form 4 insider trades.
Insider Ownership Summary of William S Hayes
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
KOS | Kosmos Energy Ltd | 2014-09-02 | Senior VP and General Counsel |
William S Hayes Latest Holdings Summary
William S Hayes currently owns a total of 1 stock. William S Hayes owns 1,204,177 shares of Kosmos Energy Ltd (KOS) as of September 2, 2014, with a value of $2 Million.
Latest Holdings of William S Hayes
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
KOS | Kosmos Energy Ltd | 2014-09-02 | 1,204,177 | 1.70 | 2,047,101 |
Holding Weightings of William S Hayes
William S Hayes Form 4 Trading Tracker
According to the SEC Form 4 filings, William S Hayes has made a total of 0 transactions in Kosmos Energy Ltd (KOS) over the past 5 years. The most-recent trade in Kosmos Energy Ltd is the sale of 21,326 shares on September 2, 2014, which brought William S Hayes around $210,274.
Insider Trading History of William S Hayes
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William S Hayes Trading Performance
GuruFocus tracks the stock performance after each of William S Hayes's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by William S Hayes is -31.06%. GuruFocus also compares William S Hayes's trading performance to market benchmark return within the same time period. The performance of stocks bought by William S Hayes within 3 months outperforms 0 times out of 1 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how William S Hayes's insider trading performs compared to the benchmark.
Performance of William S Hayes
William S Hayes Ownership Network
Ownership Network List of William S Hayes
Ownership Network Relation of William S Hayes

William S Hayes Owned Company Details
What does Kosmos Energy Ltd do?
Who are the key executives at Kosmos Energy Ltd?
William S Hayes is the Senior VP and General Counsel of Kosmos Energy Ltd. Other key executives at Kosmos Energy Ltd include director & Director and CEO Andrew G Inglis , VP & Chief Accounting Officer Ronald W. Glass , and SVP and CFO Nealesh D. Shah .
Kosmos Energy Ltd (KOS) Insider Trades Summary
Over the past 18 months, William S Hayes made no insider transaction in Kosmos Energy Ltd (KOS). Other recent insider transactions involving Kosmos Energy Ltd (KOS) include a net sale of 1,079,235 shares made by Andrew G Inglis , a net sale of 569,241 shares made by Nealesh D. Shah , and a net sale of 110,522 shares made by Ronald W. Glass .
In summary, during the past 3 months, insiders sold 698,845 shares of Kosmos Energy Ltd (KOS) in total and bought 0 shares, with a net sale of 698,845 shares. During the past 18 months, 2,779,856 shares of Kosmos Energy Ltd (KOS) were sold and 0 shares were bought by its insiders, resulting in a net sale of 2,779,856 shares.
Kosmos Energy Ltd (KOS)'s detailed insider trading history can be found in Insider Trading Tracker table.
Kosmos Energy Ltd Insider Transactions
William S Hayes Mailing Address
Above is the net worth, insider trading, and ownership report for William S Hayes. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, William S Hayes's mailing address is: Dallas Tx 75231.