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Plexium

Plexium

Private
San Diego, CaliforniaHealthcare & Life Scienceshttps://plexium.com/

Last Round

VC Round

Aug 25, 2025

Total Funding Raised

$165.1M

Momentum

Top 10%

of companies Caplight tracks

Company Overview

Plexium is a biotechnology company that develops targeted protein degradation therapeutics for the treatment of cancer and other serious diseases.

Sector

Healthcare & Life Sciences

Verticals

Biotechnology, Drug Discovery

Business Model

B2B

Customer Profile

Services & Consulting

AI Layer

Application

Keywords

targeted protein degradationmolecular glueTPDdrug discovery platformprotein degraderbiotechundruggable targetsbiobuckstherapeutic candidatessmall molecule inhibitorsproteomicsdrug developmentoncologyneurologybiopharma

Historical Pricing

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Caplight Momentum Score

Proprietary index based on bid/ask volume and sentiment.

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Plexium Comparables

Compare Plexium with similar companies based on industry and business-model similarity.

Plexium comparables — related companies by embedding similarity
CompanySimilarityMarket Cap
Proxygen
93%
Amphista Therapeutics
90%
Ambagon Therapeutics
90%

Plexium Funding Rounds

Historical fundraising activity

Data table
RoundDateAmount RaisedValuationInvestorsSources
VC RoundAug 25, 2025
VC RoundAug 25, 2024
Series BFeb 23, 2022
Series A ExtensionJan 21, 2021
Series AOct 17, 2019
Seed
Feb 1, 2018

Key People

Founding team and executive leadership

Serge Messerlian

Chief Executive Officer

Executive Team

Plexium Investors

Notable investors and investment history

Plexium investors
InvestorRounds
The Column GroupSeries B, Series A, Series A Extension
Surveyor CapitalSeries B
SoftBank Investment AdvisersSeries B
RA Capital ManagementSeries B
TCG CrossoverSeries B
A. M. Pappas & AssociatesSeries B
DCVC BioSeries A Extension, Series B, Series A

Market signals

Structured signals derived from secondary market and firmographic data.

  • Aug 21, 2026

    Monthly visitors grew 73% MoM.

  • Apr 28, 2025

    Developing selective monovalent degrader programs targeting SMARCA2, IKZF2, and CDK2.

Plexium Filings

Explore SEC and related filing metadata, where available.

Plexium filings preview — column headings only; records require access
TypeDateAmount OfferedAmount SoldFilingPagesDownload

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Frequently Asked Questions

Common questions about Plexium's valuation, stock price, and market status.

Is Plexium a public or private company?

Plexium is a private company.

What is the current stock price of Plexium?

Plexium is a private company with no public stock price. No recent secondary market data is available.

How much is Plexium worth (valuation)?

Valuation information for Plexium is not publicly available.

Can I buy Plexium stock?

Plexium shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.

When was Plexium's last funding round?

Plexium's most recent funding round was VC Round on August 25, 2024.

Who are the main investors in Plexium?

Key investors in Plexium include The Column Group, TCG Crossover, DCVC Bio, Lux Capital, The Chernin Group.

Will Plexium IPO soon?

No public IPO plans have been announced for Plexium.

How can I track Plexium secondary market activity?

Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Plexium's secondary market activity and sign up for updates.

Firmographic Details

HeadquartersSan Diego, California
Employee Range30
Year Founded2017
Last FundingAug 25, 2025

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