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Mantle Energy Raises $5M in Seed Funding led by 17Shoals, Inc. to scale engineering teams and finalize logistics for subsurface pilot deployments.

PRIVATEJun 16, 2026

Amount Raised

$5 Million

Round Type

Seed

DallasEnergyOil And GasRenewable Energy

Investors

17Shoals, Inc.

Description

Mantle Energy, a Dallas-based developer of geothermal technologies, raised $5M in seed funding. The round, led by 17Shoals, Inc., aims to scale engineering teams and secure key partnerships. The funding will support operational logistics for upcoming pilot projects. The company has spun out from Hunt Energy’s incubator.

Quick answer

Mantle Energy raised $5 Million in a Seed round, dated June 16, 2026. Investors: 17Shoals, Inc. Mantle Energy is based in Dallas, Texas, United States.

How much did Mantle Energy raise?
Mantle Energy raised $5 Million in a Seed round on June 16, 2026.
Who invested in Mantle Energy?
17Shoals, Inc. is named as investors in this round.
What does Mantle Energy do?
Mantle Energy is a Dallas, Texas-based developer of an activated geothermal and enhanced energy recovery platform.
Where is Mantle Energy based and how big is it?
Mantle Energy is based in Dallas, Texas, United States.

Source: Fundz verified event record.

Who else raised in Energy and Oil And Gas around the same time

Companies in the same sectors as Mantle Energy that raised within 45 days of this round, from Fundz verified event records.

  • Lydian raised $43M (Series A) on July 30, 2026.
  • Airmo raised $12M on July 29, 2026.
  • Haffner Energy and IðunnH2 raised $740K (Corporate Round) on July 27, 2026.
  • Rock Tech Lithium raised $80M on July 27, 2026.
  • Dangote Petroleum Refinery and Petrochemicals FZE raised $2.5B (Private Equity) on July 24, 2026.
  • Sabanto raised an undisclosed amount (Series B) on July 14, 2026.

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Company Information

Company

Mantle Energy

Location

Dallas, Texas, United States

About

Mantle Energy is a Dallas, Texas-based developer of an activated geothermal and enhanced energy recovery platform. The company develops technology that repurposes depleted or low-yield oil and gas wells to generate controlled underground thermal combustion, capturing heat to deliver low-carbon baseload power directly to the electric grid. It was spun out from Hunt Energy's incubator and focuses on dual-benefit extraction and carbon emission storage protocols.

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Mantle Energy raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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