Fieldstone Bio
fieldstone.bio
Actively hiring
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Overview
News
Salaries
Products
People
Growth
Offices
Financials
Funding and backers
Total raised
$5.9M
1 round on record
Latest round
$5.9M
Venture round · Dec 2024 · 21 mo ago
Team
11
US Form 5500 (plan participants) · Dec 2025 · +83% in a year
Hiring now
4
+1 posted in 30 days
Backers
2
LDV Capital, Ubiquity Ventures
The money's age
Due for its next round
21 months since the last round · and hiring
Momentum
25/100
hiring for its size, in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
2025
Team of 11 was 6 · US Form 5500 (plan participants)
Dec 16, 2024
Raised a round Venture round $5.9M · SEC Form D
2023
Founded
Tractionpublic signals, read monthly
Web presence
top 5%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Venture round | Dec 2024 | $5.9M | — | SEC Form D |
Registers and programsofficial lists and records that name the company
| Legal entity | Fieldstone Bio, Inc. | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Patrick StoneExecutive Officer, DirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
LDV Capital 
Ubiquity Ventures Similar startupsby what they do, their industry and backers
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Overview
Find Critical Minerals Faster With Accuracy. Fieldstone sensors provide high-resolution decision intelligence at scale.
News
What This Microbiologist Learned at Future of Mining Australia 2026
Michelle shares her takeaways on the exciting future of microbiology in mining.
Read more
Report
Fieldstone Bio, TerraCore, MIT Awarded $2M U.S. DOE Contract
New field-deployable approach "reads" gold, rare earths, nickel & more, cutting assay time from weeks to hours.
Read more
Report
Fieldstone Bio, TerraCore, and MIT Awarded U.S. Department of Energy Contract to Accelerate Critical Mineral Discovery
Fieldstone Bio, TerraCore, and MIT Awarded U.S. Department of Energy Contract to Accelerate Critical Mineral Discovery
Read more
Report
Fieldstone Bio, TerraCore, and MIT Awarded U.S. Department of Energy Contract to Accelerate ...
Read more
Report
Fieldstone Bio, Terracore, And MIT Awarded U.S. Department Of Energy Contract To Accelerate Critical Mineral Discovery
Fieldstone Bio, Terracore, And MIT Awarded U.S. Department Of Energy Contract To Accelerate Critical Mineral Discovery. New field-deployable approach uses engineered microbial sensors and compact imaging to read gold, rare earth elements, nickel, and more
Read more
Report
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People
Patrick Stone
Executive Officer, Director
Calvin Chin
Director
Brandon Fields
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Growth
Hiring Momentum
40/100
Stable
Open positions
4
1 opened / 0 closed in 30 days
ATS activity
Every ~8 hours
09/29/2026
Hiring Dynamics
0%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Science & Research
100%
Offices
Where the company hires and what each office is for
Cities
3
Hiring now
1
Countries
1
Busiest office
Woburn
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Headquarters
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Office with open vacancies
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Andover
United States
HQ
Woburn
United States
Engineering / R&D
Fieldstone Bio
4 open roles 3 posted in 90 days 100% engineering 50-200 est. staff
hires for Science & Research
Reno
United States
Regional office
UNR Office
Financials
Total raised
$5.9M
Latest round
Venture - Series Unknown
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Venture - Series Unknown | 2024 | $5.9M | Details |