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.
SL

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.
ES

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 TechnologyRule 506(b)
▶$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
▶$500KraisedFeb 2021 · 3 investors · Other TechnologyRule 506(b)
▶$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
▶$150KraisedFeb 2020 · 2 investors · Other TechnologyRule 506(b)
▶$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
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.