DP
David J. Portman
10% Owner
David J. Portman10% Owner
David J. Portman insider trades: LeonaBio (LONA) SEC Form 4 filings
10% Owner, LeonaBio 1 Form 4 filing
1
Form 4 filings
last Oct 28, 2026
1
Other transactions
filings
1
Company
Companies
Where David reports to the SEC
Other LONA insiders
Open-market trades in the last 12 months
About David J. Portman's insider trades
David J. Portman is a 10% owner of LeonaBio (LONA). David has not reported an open-market purchase or sale.
Their filings also include other transactions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every LONA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.