Boston Materials

Billerica, MA · Founded 2016 · Privately Held (backing)

Manufacturer of advanced composite materials intended for semiconductor and datacenter thermal management and lightweight aerospace structures. Boston Materials is based in Billerica, MA and was founded in 2016. Its last reported valuation was $56 million in Nov 2022. It has raised $52.6 million across 7 recorded rounds; the latest was a $28.3 million early-stage round in Sep 2024.

Last reported valuation
$56.0M
Oct 2026
Priced at
—
Total raised
$52.6M
Last round
Early Stage VC
Sep 2024
What is Boston Materials worth?
$56.0Mlast reported valuation · Oct 2026

Boston Materials's last reported valuation, Nov 2022. Nothing priced has surfaced 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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Boston Materials funding history

7 rounds
DateRoundRaisedPost-money
Sep 2024Early Stage VC$28.3M▮
Dec 2022Debt$2.0M▮
Oct 2022Early Stage VC$12.0M▮
May 2021Early Stage VC$10.5M▮
May 2020Seed Round$565K▮
Oct 2019Debt$1.5M▮
+ 1 earlier rounds · a free account shows the full history
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Boston Materials valuation

Boston Materials's last reported valuation was $56 million in Nov 2022. No priced round, secondary trade or fund mark has surfaced since.

How much has Boston Materials raised?

Boston Materials has raised $52.6 million across 7 recorded rounds since 2018. The largest was a $565,000 seed round in May 2020; the most recent was a $28.3 million early-stage round in Sep 2024.

Boston Materials has filed 8 Form Ds with the SEC since 2018, most recently in Sep 2025 ($18.2 million sold to 9 investors).

How Boston Materials'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 Boston Materials, 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 last reported valuation. Question about this number? Full methodology →

Frequently asked about Boston Materials

What is Boston Materials worth?
Boston Materials is valued at $56.0M as of Oct 2026. Boston Materials's last reported valuation, Nov 2022. Nothing priced has surfaced since.
How much has Boston Materials raised?
Boston Materials has raised $52.6M in total funding across 7 recorded rounds.
When did Boston Materials last raise?
Boston Materials last raised in Sep 2024 (Early Stage VC), raising $28.3M.