/Companies

Metalmark Innovations

Allston, US · Founded 2017 · Incorporated in Delaware

Find your way into Metalmark Innovations

Sign up to see every warm intro you have to Metalmark Innovations

  • Paths you didn't know you had: your email and LinkedIn already hold routes to the Metalmark Innovations team. We find them for you
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Founders & leadership

Metalmark Innovations was founded in 2017 by Sissi Liu, Elijah Shirman, and Joanna Aizenberg.

SLSissi Liu
Sissi LiuChief Executive OfficerSissi Liu is Chief Executive Officer and Co-Founder of Metalmark Innovations, which develops air cleaning and filtration products. She has over 20 years of experience in climate technology and serves on technical committees for ASHRAE.
ESElijah Shirman
Elijah ShirmanVice President, TechnologyElijah Shirman is Vice President of Technology at Metalmark Innovations, where he leads R&D efforts spanning materials science, physics, and chemistry. He has experience guiding projects from concept through prototyping and manufacturing readiness.
JA
Joanna AizenbergTreasurer

Reported raises · per SEC filings

Form D private placements

$3.9M disclosed across 3 rounds · 2020–2022

▶$3.3MraisedFeb 2022 · 4 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Denise ChenDirector
  • Sissi LiuExecutive Officer, Director
  • Elijah ShirmanExecutive Officer
  • Tanya ShirmanExecutive Officer, Director
Offering amount
$3.5M
Amount sold
$3.3M
Minimum investment
$50K
First sale
Feb 2022
Incorporated
Other, Delaware, 2017
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$500KraisedFeb 2021 · 3 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Sissi LiuExecutive Officer, Director
  • Joanna AizenbergExecutive Officer, Director
  • Tanya ShirmanExecutive Officer
  • Elijah ShirmanExecutive Officer, Director
Offering amount
$500K
Amount sold
$500K
Minimum investment
$50K
First sale
Feb 2021
Incorporated
Corporation, Delaware, 2017
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$150KraisedFeb 2020 · 2 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Sissi LiuExecutive Officer, Director
  • Elijah ShirmanExecutive Officer, Director
  • Joanna AizenbergExecutive Officer, Director
Offering amount
$150K
Amount sold
$150K
Minimum investment
$50K
Proceeds to insiders
$70K
First sale
Feb 2020
Incorporated
Corporation, Delaware, 2017
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 Metalmark Innovations?
Metalmark Innovations was founded by Sissi Liu, Elijah Shirman, Joanna Aizenberg in 2017.
How much funding has Metalmark Innovations raised?
Metalmark Innovations has disclosed $3.9M raised across 3 rounds.
Where is Metalmark Innovations headquartered?
Metalmark Innovations is headquartered in Allston, US.