Mark R Widmar - Net Worth and Insider Trading

Mark R Widmar Net Worth

The estimated net worth of Mark R Widmar is at least $17 Million dollars as of 2026-08-02. Mark R Widmar is the CEO of First Solar Inc and owns about 81,861 shares of First Solar Inc (FSLR) stock worth over $17 Million. Details can be seen in Mark R Widmar'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 R Widmar has not made any transactions after 2026-05-26 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Mark R Widmar

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Are these stocks worth buying? — GuruFocus analysis for each holding

Mark R Widmar Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, Mark R Widmar owns 4 companies in total, including First Solar Inc (FSLR) , 8point3 Energy Partners LP (CAFD) , and GrafTech International Ltd (EAF) among others .

Click here to see the complete history of Mark R Widmar’s form 4 insider trades.

Insider Ownership Summary of Mark R Widmar

Ticker Company Transaction Date Type of Owner
FSLR First Solar Inc 2026-05-26 Chief Financial Officer
CAFD 8point3 Energy Partners LP 2015-06-18 director & CFO and Director
EAF GrafTech International Ltd 2008-12-15 VP & CFO
LIMIT LIMIT 2026-02-26 director

Mark R Widmar Latest Holdings Summary

Mark R Widmar currently owns a total of 1 stock. Mark R Widmar owns 81,861 shares of First Solar Inc (FSLR) as of May 26, 2026, with a value of $17 Million.

Latest Holdings of Mark R Widmar

Ticker Company Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
FSLR First Solar Inc 2026-05-26 81,861 211.03 17,275,127

Holding Weightings of Mark R Widmar


Mark R Widmar Form 4 Trading Tracker

According to the SEC Form 4 filings, Mark R Widmar has made a total of 20 transactions in First Solar Inc (FSLR) over the past 5 years, including 0 buys and 20 sells. The most-recent trade in First Solar Inc is the sale of 7,172 shares on May 26, 2026, which brought Mark R Widmar around $2 Million.

Insider Trading History of Mark R Widmar

* The information on this page (including Insider Trading Shares, Share Changes, Cost, etc.) is sourced exclusively from Form 4 filings and does not incorporate any data from 13F or 13D/G filings. As a result, it may differ from the values shown on the Guru page.

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.

Mark R Widmar Trading Performance

GuruFocus tracks the stock performance after each of Mark R Widmar's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Mark R Widmar is -56.59%. GuruFocus also compares Mark R Widmar's trading performance to market benchmark return within the same time period. The performance of stocks bought by Mark R Widmar 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 Mark R Widmar's insider trading performs compared to the benchmark.

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

Performance of Mark R Widmar

Average Return

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Average return per transaction

Outperforming Transactions

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0 out of 1 outperforming transactions.
Each transaction is measured over a period and compared to .
1 Month 3 Months 6 Months 1 Year 2 Years 3 Years
Return(%) -26.67 LIMIT LIMIT LIMIT LIMIT LIMIT
Relative Return to S&P 500(%) -23.17 LIMIT LIMIT LIMIT LIMIT LIMIT

Get the full picture on these stocks
See GF Score, valuation, financials, and warning signs for every stock Mark R Widmar owns.
View FSLR Analysis

Mark R Widmar Ownership Network

Ownership Network List of Mark R Widmar

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Ownership Network Relation of Mark R Widmar

Insider Network Chart


Mark R Widmar Owned Company Details

What does First Solar Inc do?

Who are the key executives at First Solar Inc?

Mark R Widmar is the Chief Financial Officer of First Solar Inc. Other key executives at First Solar Inc include Chief Quality and Rel. Officer Patrick James Buehler , EVP & HR & Communications Caroline Stockdale , and Chief Mfg. Engineering Officer Kuntal Kumar Verma .

First Solar Inc (FSLR) Insider Trades Summary

Over the past 18 months, Mark R Widmar made 12 insider transaction in First Solar Inc (FSLR) with a net sale of 94,760. Other recent insider transactions involving First Solar Inc (FSLR) include a net sale of 20,896 shares made by Kuntal Kumar Verma , a net sale of 1,549 shares made by Nathan B. Theurer , and a net sale of 9,319 shares made by Patrick James Buehler .

In summary, during the past 3 months, insiders sold 46,265 shares of First Solar Inc (FSLR) in total and bought 0 shares, with a net sale of 46,265 shares. During the past 18 months, 265,399 shares of First Solar Inc (FSLR) were sold and 0 shares were bought by its insiders, resulting in a net sale of 265,399 shares.

First Solar Inc (FSLR)'s detailed insider trading history can be found in Insider Trading Tracker table.

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First Solar Inc Insider Transactions

No Available Data

Mark R Widmar Mailing Address

Above is the net worth, insider trading, and ownership report for Mark R Widmar. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Mark R Widmar's mailing address is: Parma Oh 44130.