Spear Bio

Woburn, MA · Founded 2021 · Privately Held (backing)

Developer of ultrasensitive protein detection technology designed to offer significant benefits across the healthcare value chain. Spear Bio is based in Woburn, MA and was founded in 2021. Its last known valuation is $134 million. It has raised $69.8 million across 4 recorded rounds; the latest was a $45 million early-stage round in Jul 2024.

Last price · $/share
—
Implied valuation
$134.0M
Total raised
$69.8M
Last round
Early Stage VC
Jul 2024
What is Spear Bio worth?
$134.0Mlast known valuation

Spear Bio last raised $45.0M in its Early Stage VC (Jul 2024).

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Spear Bio funding history

4 rounds
DateRoundRaisedPost-money
Jul 2024Early Stage VC$45.0M▮
Oct 2022Seed Round$2.4M▮
Sep 2021Debt$1.6M▮
Mar 2021Seed Round$1.1M▮
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Spear Bio valuation

Spear Bio's last known valuation is $134 million. The figure stands until a priced round, a secondary trade or an institutional fund mark prices the stock again.

How much has Spear Bio raised?

Spear Bio has raised $69.8 million across 4 recorded rounds since 2021. The largest was a $45 million early-stage round in Jul 2024.

Spear Bio has filed 4 Form Ds with the SEC since 2021, most recently in Aug 2024 ($45 million sold to 8 investors).

How Spear Bio'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 Spear Bio, too few pricing signals exist to publish a composite mark; the figures above reflect the most recent observed valuation event. Full methodology →

Frequently asked about Spear Bio

What is Spear Bio worth?
Spear Bio's last known valuation is $134.0M.
How much has Spear Bio raised?
Spear Bio has raised $69.8M in total funding across 4 recorded rounds.
When did Spear Bio last raise?
Spear Bio last raised in Jul 2024 (Early Stage VC), raising $45.0M.