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Mantel Capture, Inc.

Develops carbon capture systems for industrial facilities and power plants.

Updated Nov 9, 2026·Latest SEC filing Aug 24, 2026·Suggest an edit

About Mantel

Mantel is a private company based in Cambridge, Massachusetts, incorporated in 2022 in Delaware. It has reported $50,466,523 raised in four offerings on Form D since September 2022. Its chief executive is Cameron Halliday.

Funding Rounds (SEC Form D)

First saleFiled with SECAmount soldInvestorsAvg. checkTermsFiling
Jul 10, 2026Aug 24, 2026$18,336,764of $24.9M target7$2.6MEquityRule 506(b)Form D ↗
Jun 20, 2024Sep 5, 2024$29,424,989of $30.0M target13$2.2MEquityRule 506(b)Form D ↗
Dec 20, 2023Jan 4, 2024$700,000fully sold1$700KEquity, OptionsRule 506(b)Form D ↗
Aug 19, 2022Sep 6, 2022$2,004,770fully sold2$1.0MEquityRule 506(b)Form D ↗
Total, four offerings$50,466,523

First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.

Leadership Team

Executive officers and directors listed on Mantel's Form D filed Aug 24, 2026.

HO
Hoosiweng Ow
Director
CH
Cameron Halliday
Co-founder and CEO, director
MK
DL
Dan Leff
Director

Earlier filings also listed Hooisweng Ow (director, last listed Sep 2024), Danielle Colson (executive officer and director, last listed Jan 2024) and Sean Robertson (director, last listed Sep 2022).

Sources

  1. SECMantel Capture, Inc. filing history
  2. ResearchMantel comments to the Environmental Protection Agency
  3. InvestorMantel at Engine Ventures