Drug Discovery · San Diego, CA · Founded 2017 · Privately Held (backing)
Developer of protein-degrading therapeutics designed to treat cancer and other serious diseases. Plexium is based in San Diego, CA and was founded in 2017. It was valued at $200 million at its later-stage round in Aug 2025, the last priced event on record. It has raised $225 million across 2 recorded rounds; the latest was a $60.1 million later-stage round in Jul 2025.
PMV mark · valuation
$200.0M
Oct 2026
Priced at
its later-stage round
Aug 2025
Total raised
$225.1M
Last round
Later Stage VC
Jul 2025
Cap table — not yet on record
Plexium's share-class structure hasn't surfaced in our sources yet. Cap tables are assembled from certificates of incorporation, round filings, and disclosures as they land.
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·The complete investor list: 18 names
·Watch Plexium: the Monday email on marks, rounds and moves