Mark James Litton - Net Worth and Insider Trading
Mark James Litton Net Worth
The estimated net worth of Mark James Litton is at least $3 Million dollars as of 2026-09-11. Mark James Litton is the Chief Business Officer of Alder BioPharmaceuticals Inc and owns about 128,189 shares of Alder BioPharmaceuticals Inc (ALDR) stock worth over $2 Million. Mark James Litton is also the PRESIDENT and CEO of LeonaBio Inc and owns about 59,894 shares of LeonaBio Inc (LONA) stock worth over $419,192. Details can be seen in Mark James Litton'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 James Litton has not made any transactions after 2026-03-04 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.
Transaction Summary of Mark James Litton
Mark James Litton Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Mark James Litton owns 3 companies in total, including LeonaBio Inc (LONA) , Alpine Immune Sciences Inc (ALPN) , and Alder BioPharmaceuticals Inc (ALDR) .
Click here to see the complete history of Mark James Litton’s form 4 insider trades.
Insider Ownership Summary of Mark James Litton
| Ticker | Company | Transaction Date | Type of Owner |
|---|---|---|---|
| LONA | LeonaBio Inc | 2026-03-04 | Chief Operating Officer |
| ALPN | Alpine Immune Sciences Inc | 2018-08-06 | See Remarks |
| ALDR | Alder BioPharmaceuticals Inc | 2018-06-01 | Chief Business Officer |
Mark James Litton Latest Holdings Summary
Mark James Litton currently owns a total of 2 stocks. Among these stocks, Mark James Litton owns 128,189 shares of Alder BioPharmaceuticals Inc (ALDR) as of June 1, 2018, with a value of $2 Million and a weighting of 85.24%. Mark James Litton also owns 59,894 shares of LeonaBio Inc (LONA) as of March 4, 2026, with a value of $419,192 and a weighting of 14.76%.
Latest Holdings of Mark James Litton
| Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
|---|---|---|---|---|---|
| ALDR | Alder BioPharmaceuticals Inc | 2018-06-01 | 128,189 | 18.88 | 2,420,208 |
| LONA | LeonaBio Inc | 2026-03-04 | 59,894 | 7.00 | 419,192 |
Holding Weightings of Mark James Litton
Mark James Litton Form 4 Trading Tracker
According to the SEC Form 4 filings, Mark James Litton has made a total of 0 transactions in Alder BioPharmaceuticals Inc (ALDR) over the past 5 years. The most-recent trade in Alder BioPharmaceuticals Inc is the sale of 22,727 shares on June 1, 2018, which brought Mark James Litton around $405,450.
According to the SEC Form 4 filings, Mark James Litton has made a total of 8 transactions in LeonaBio Inc (LONA) over the past 5 years, including 0 buys and 8 sells. The most-recent trade in LeonaBio Inc is the sale of 5,156 shares on March 4, 2026, which brought Mark James Litton around $27,688.
Insider Trading History of Mark James Litton
* 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.
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Mark James Litton Trading Performance
Mark James Litton Ownership Network
Ownership Network List of Mark James Litton
Ownership Network Relation of Mark James Litton
Mark James Litton Owned Company Details
What does LeonaBio Inc do?
Who are the key executives at LeonaBio Inc?
Mark James Litton is the Chief Operating Officer of LeonaBio Inc. Other key executives at LeonaBio Inc include CHIEF MEDICAL OFFICER Martin Javier San , Vice President of Discovery Kevin Church , and General Counsel Mark Worthington .
LeonaBio Inc (LONA) Insider Trades Summary
Over the past 18 months, Mark James Litton made 3 insider transaction in LeonaBio Inc (LONA) with a net sale of 32,865. Other recent insider transactions involving LeonaBio Inc (LONA) include a net sale of 14,206 shares made by Martin Javier San , a net sale of 10,761 shares made by Kevin Church , and a net sale of 10,730 shares made by Mark Worthington .
In summary, during the past 3 months, insiders sold 0 shares of LeonaBio Inc (LONA) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 22,339 shares of LeonaBio Inc (LONA) were sold and 0 shares were bought by its insiders, resulting in a net sale of 22,339 shares.
LeonaBio Inc (LONA)'s detailed insider trading history can be found in Insider Trading Tracker table.
LeonaBio Inc Insider Transactions
Mark James Litton Mailing Address
Above is the net worth, insider trading, and ownership report for Mark James Litton. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Mark James Litton's mailing address is: Bothell Wa 98011.
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