Biomason

Durham, NC · Founded 2012 · Privately Held (backing)

Developer of a building materials technology designed to harness biology to produce high-quality concrete, replace Portland cement, and cut carbon emissions. Biomason is based in Durham, NC and was founded in 2012. It was valued at $187 million at its later-stage round in Dec 2024, the last priced event on record. It has raised $133 million across 6 recorded rounds; the latest was a $36.7 million early-stage round in Dec 2024.

PMV mark · valuation
$186.7M
Oct 2026
Priced at
its later-stage round
Dec 2024
Total raised
$132.9M
Last round
Early Stage VC
Dec 2024
What is Biomason worth?
$186.7MPrivateMarketView mark · Oct 2026

Valued at $186.7M at its later-stage round, Dec 2024. Nothing has traded since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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Biomason funding history

6 rounds
DateRoundRaisedPost-money
Dec 2024Early Stage VC$36.7M▮
Feb 2022Later Stage VC$65.0M▮
Nov 2019Seed Round$5.0M▮
Apr 2017Debt$3.4M▮
Dec 2015Seed Round$1.5M▮
Sep 2013Seed Round$500K▮
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Biomason valuation

Biomason was valued at $187 million at its later-stage round in Dec 2024. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Biomason raised?

Biomason has raised $133 million across 6 recorded rounds since 2013. The largest was a $65 million later-stage round in Feb 2022; the most recent was a $36.7 million early-stage round in Dec 2024.

Biomason has filed 7 Form Ds with the SEC since 2013, most recently in Jan 2025 ($36.7 million sold to 6 investors).

How Biomason's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For Biomason, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by its last priced round. Question about this number? Full methodology →

Frequently asked about Biomason

What is Biomason worth?
Biomason is valued at $186.7M as of Oct 2026. Valued at $186.7M at its later-stage round, Dec 2024. Nothing has traded since.
How much has Biomason raised?
Biomason has raised $132.9M in total funding across 6 recorded rounds.
When did Biomason last raise?
Biomason last raised in Dec 2024 (Early Stage VC), raising $36.7M.