Arkolith/Insider Trading/MTSR/Form 4

ARCH Venture Partners XII, LLC

Director, 10% OwnerMetsera, Inc. (MTSR) · full profile →Form 4 · filed Nov 14, 2025
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
2
2 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Nov 13, 2025Disposed to issuer(D)8.3M——0
Nov 13, 2025Disposed to issuer(D)18.5M——0

Transaction Codes

D
Disposition to the issuer

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001012975-25-000791) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML