Arkolith/Insider Trading/UPB/Form 4

Ambrose Allison

General CounselUpstream Bio, Inc. (UPB) · full profile →Form 4 · filed Mar 17, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$4K
Net Open-Market Flow
-$4K
Transactions
1
1 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 16, 2026Sell(S)475$9.29$4K17K

Transaction Codes

S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001193125-26-111121) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML