Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.

Systems2

Plasma Excavation System (PES)

Plasma-torch trenching and excavation machine that spalls hard rock without explosives or cutters.

Prototype

Tunnel Boring Robot (TBR)

Plasma tunnel-boring machine for utility, fibre and pipeline tunnels in hard rock.

Prototype

Newest unveiled first. Open a system for its milestone timeline, components and sources.

Supply Chain1 facility

Facilities1

Facilities
Facility	Kind	Location	Status	Confidence
EarthGrid Richmond Headquarters	Headquarters	Richmond, CA, United States	Operating	Reported

EarthGrid Richmond Headquarters
Headquarters · Richmond, CA, United States
Operating
Reported

People3

All 3 people →

Troy Helming
Founder & CEO
Mark Park
VP Engineering
Rachel Payne
Board of Directors

Company Metrics

LinkedIn employee profiles: 27; Observed Oct 11, 2026
Bright Data / LinkedIn · Source ↗
LinkedIn followers: 4,235; Observed Oct 11, 2026
Bright Data / LinkedIn · Source ↗

Employee-profile counts reflect LinkedIn profiles associated with the company, not verified headcount. One observation establishes a baseline; it does not establish growth.

Sources13

Show all 13 sources and supporting evidence

Profile4

1
CompanyEarthGrid™ Plasma Tunnel-Boring Technology
Earthgrid · Supports Organization · description, Organization · name, Organization · website
“EarthGrid™ is developing the world’s first way to tunnel, trench, and excavate using our patented plasma tunnel-boring technology.”
2
DatabaseEarthgrid - PitchBook company profile
PitchBook · Supports Organization · employee range, Organization · founded year, Organization · linkedin url, Organization · x url
“employee_range: 11-50 (profile: 27)”
3
DatabaseSixth-Domain public startups directory
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "USA", "hq_iso2": "US", "id": "ae53f646-cd85-48c7-b767-04ddbb91c167"}”
4
DatabaseEarthGrid PBC - Crunchbase company profile
Crunchbase · Supports Organization · legal name, Organization · status
“legal_name: EarthGrid PBC”

Systems3

5
NewsThe critical tech staying safe by going underground
BBC News · Aug 18, 2026 · Supports System · maturity
“During the California test this January, EarthGrid's cigar-shaped boring machine chewed through three metres of granite.”
6
CompanyEarthGrid Showcases Breakthrough Plasma Excavation Technology in Norway, Opens Door to European Pilot Projects
EarthGrid · Sep 24, 2025 · Supports Organization · aliases, Role, System
“EarthGrid PBC, in collaboration with Statnett SF, has successfully completed a breakthrough demonstration of its Plasma Excavation System (PES)”
7
CompanyNews - EarthGrid™
EarthGrid · Supports System · maturity
“In late June, EarthGrid PBC successfully deployed it's Plasma Excavation System (PES) in Raymond, California.”

Funding4

8
Regulatory filingEarthGrid PBC - SEC Form D (0001918687-26-000002)
U.S. Securities and Exchange Commission · Aug 10, 2026 · Supports Funding round · amount, Organization · ownership
“<totalAmountSold>52838297</totalAmountSold>”
9
DatabaseEarthGrid - CB Insights company profile
CB Insights · Oct 15, 2024 · Supports Funding round
“Angel - II”
10
NewsEarthGrid PBC Seed Funding Oversubscribed
Gulf Oil and Gas · Oct 18, 2023 · Supports Funding round · amount
“it has raised $30 million at the close of its seed funding”
11
DatabaseEarthGrid - Kingscrowd company profile
Kingscrowd · Aug 31, 2023 · Supports Funding round · amount, Funding round · post money valuation usd
“1.24 ($1,239,194)”

Supply chain1

12
DatabaseEarthGrid PBC - LinkedIn company profile
LinkedIn · Supports Facility, Organization · employee range, Organization · founded year, Organization · hq city, Organization · linkedin url, Organization metric · employees in linkedin, Organization metric · followers
“headquarters: Richmond, CA”

People1

13
CompanyTeam - EarthGrid™
EarthGrid · Supports Role
“Mark Park”

Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.