David Portnoy is a Partner at American Securities, whose known portfolio counts 10 companies.
Is David Portnoy a fit for your startup?
Paste your website. AI checks the fit and scores every other investor too.
Investment focus
- Stage
- Late-Stage
Contacts
Affiliated funds' portfolios
Partner at American Securities, whose known portfolio counts 10 companies
- Presidio
- RPAC
- Unison Site Management
- Acuren
- Advanced Drainage Systems
- Amentum
- Anthony International
- Dauch
- Lakeside Energy
- RealManage
Investor Profile
Founders in the listed sectors Climate, Hardware and Real Estate, and focus areas Clean Energy, Construction Tech, Defense and Mobility fall inside that listing.
American Securities appears in Late-Stage rounds across its known deals.
What the affiliated firm has backed is the closest available signal on whether David Portnoy is worth approaching.
Colleagues at American Securities
Showing 20 of 30
Natasha Kingshott
Principal
New York, United States
Michael Counihan
Investor
New York, United States
Kevin Penn
Managing Director
New York, United States
Kevin Gattshall
Principal
New York, United States
Noah Scherz
Partner
New York, United States
Ryan Nolan
Principal
New York, United States
Michael Sand
Partner
New York, United States
Michael Fisch
Founder & CEO
New York, United States
Ben Dickson
Partner
New York, United States
Brett Roston
Vice President
New York, United States
Connor Wentzell
Principal
New York, United States
Aaron Maeng
Managing Director
United States
David Horing
Managing Director
New York, United States
Ian R.
Director
New York, United States
William Gao
Vice President
Shanghai, China
Nikhil Chopra
Director
New York, United States
Stephen Yan
Vice President
Shanghai, China
Bill Fry
Managing Director
New York, United States
Samuel Jong
Vice President
New York, United States
Ross Andrese
Director
New York, United States
Frequently asked questions
Who is David Portnoy?
David Portnoy is a private equity investor based in New York, United States, listed as Partner at American Securities. The known portfolio of that firm counts 10 companies. That portfolio belongs to the firm, not to David Portnoy personally.
What does David Portnoy invest in?
Listed sectors include Climate, Hardware and Real Estate; listed focus areas include Clean Energy, Construction Tech, Defense and Mobility. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does David Portnoy invest at?
American Securities appears in Late-Stage rounds across its known deals, and David Portnoy is listed there as Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is David Portnoy listed at?
David Portnoy is listed as Partner at American Securities. 30 other people in the database share a firm with David Portnoy.
How do I contact David Portnoy?
An email address, a phone number and a LinkedIn page are on file for David Portnoy. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
Skip the browsing. Let AI find your ideal investors in one minute.
Paste your startup website and AI picks your best-fit investors out of 135,000+ profiles.
Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal