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Boston Electrometallurgical

Woburn, US · Delaware corporation · 2 known investors

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Founders & leadership

DSDonald Sadoway
Donald SadowayFounder
TCTadeu Carneiro
Tadeu CarneiroExecutiveTadeu Carneiro joined Boston Metal in 2017 and has served as an executive officer and director; he previously spent nearly three decades at CBMM, including a tenure as CEO, and holds degrees in metallurgical engineering from Escola Politécnica da USP and an MBA from University of Pittsburgh Katz Graduate School of Business.
CP
Christopher PoirierNamed on SEC filing
IW
Ingo WenderNamed on SEC filing

Board

MCMark Cupta
Mark CuptaBoard directorManaging Director at Prelude Ventures
SK
Shyan KamadolliBoard director
IG
Irina GorbounovaBoard director
KR
Katie RaeBoard director
RC
Rick CutrightBoard director
CP
Christopher PoirerBoard director
ED
Eduardo De Salles BartolomeoBoard director

Investors · 2

ArcelorMittalreported

How we know: funding news · press coverage · Not right? Tell us

Prelude VenturesinferredSan Francisco · $100K – $5Mvia Mark Cupta · board

How we know: board seat on SEC Form D · Not right? Tell us

Reported raises · per SEC filings

Form D private placements

$240.9M disclosed across 4 of 5 rounds · 2018–2026

▶$100MofferedMar 2026 · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Eduardo De Salles BartolomeoDirector
  • Katie RaeDirector
  • Ingo WenderDirector
  • Irina GorbounovaDirector
  • Tadeu CarneiroExecutive Officer, Director
  • Rick CutrightDirector
  • Shyam KamadolliDirector
  • Roy HarveyDirector
  • Mark CuptaDirector
Offering amount
$100M
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$51MraisedJul 2025 · 5 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Mark CuptaDirector
  • Shyan KamadolliDirector
  • Irina GorbounovaDirector
  • Katie RaeDirector
  • Tadeu CarneiroExecutive Officer, Director
  • Rick CutrightDirector
  • Christopher PoirerDirector
  • Eduardo De Salles BartolomeoDirector
Offering amount
$75M
Amount sold
$51M
First sale
Jun 2025
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$120.7MraisedFeb 2023 · 13 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • DONALD SADOWAYDirector
  • SHYAM KAMADOLLIDirector
  • KATIE RAEDirector
  • INGO WENDERDirector
  • CHRISTOPHER POIRIERDirector
  • Tadeu CarneiroExecutive Officer, Director
  • RICK CUTRIGHTDirector
  • IRINA GORBOUNOVADirector
  • MARK CUPTADirector
Offering amount
$300M
Amount sold
$120.7M
First sale
Jan 2023
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$50.1MraisedJan 2021 · 8 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Donald SadowayDirector
  • Mark CuptaDirector
  • Katie RaeDirector
  • Christopher PoirierDirector
  • Ingo WenderDirector
  • Tadeu CarneiroExecutive Officer, Director
  • Shyam KamadolliDirector
Offering amount
$60M
Amount sold
$50.1M
First sale
Dec 2020
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$19.1MraisedJan 2019 · 6 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Katie RaeDirector
  • Mark CuptaDirector
  • Tadeu CarneiroExecutive Officer, Director
  • Donald SadowayDirector
  • Christopher PoirierDirector
  • Ingo WenderDirector
Offering amount
$26M
Amount sold
$19.1M
First sale
Dec 2018
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Frequently asked questions

Who founded Boston Electrometallurgical?
Boston Electrometallurgical was founded by Donald Sadoway.
Who are Boston Electrometallurgical's investors?
Boston Electrometallurgical's investors include ArcelorMittal, Prelude Ventures.
How much funding has Boston Electrometallurgical raised?
Boston Electrometallurgical has disclosed $240.9M raised across 4 of its 5 known rounds.
Where is Boston Electrometallurgical headquartered?
Boston Electrometallurgical is headquartered in Woburn, US.