David J. Portman
David J. Portman has made 1 open-market purchase worth $0 since Oct 29, 2026, in 1 company. The latest: $0 of LONA, filed Oct 29, 2026, scored 30 out of 100.
10% owner, LeonaBio, Inc.
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Purchases
| Filed | Stock | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Oct 29 Form 4 (opens sec.gov) |
LONALeonaBio, Inc. · 10% owner10% owner | New position | 30 | $0 3,149,470 at $3149.47 |
— | — |
Questions
What stock has David J. Portman bought?
LONA (LeonaBio, Inc.), all on the open market and reported on SEC Form 4.
When did David J. Portman last buy?
Oct 29, 2026: 3,149,470 shares of LONA at $3149.47, $0 in all (Form 4 (opens sec.gov)).
Has David J. Portman filed a notice of a planned sale?
Not in the filings on record. A Form 144 is the notice an insider must file before selling restricted or control shares, and it lands on EDGAR before the sale is reported.
Is David J. Portman a routine or an opportunistic buyer?
There isn't enough history to say yet.
Data as of Oct 29, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer