Brandon Sack works as an Investor at Addition. The firm's known portfolio counts 17 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Investor at Addition, whose known portfolio counts 17 companies
- Anthropic
- Stedi
- Snyk
- Chapter
- Airwallex
- Frore Systems
- Chainalysis
- Biologica
- CloudX
- Fauna
- Render
- Xscape Photonics
- and 5 more
Investor Profile
Brandon Sack is listed against sectors AI, Commerce, Education and FinTech, and focus areas Analytics, Biotech, Cloud Infrastructure and Creator Economy in the database.
Addition appears in Growth, Seed and Series A rounds across its known deals.
The firm portfolio and the focus above give founders context on whether Brandon Sack matches their raise.
Colleagues at Addition
Zander Lurie
Operating Partner
Los Angeles, United States
Lee Fixel
Investor
New York, United States
Aaron Schildkrout
Partner
New York, United States
Todd Arfman
Partner
New York, United States
Jason Schneider
Investor
New York, United States
Jack Spiegel
Investor
New York, United States
Robbie Horwitz
Partner
New York, United States
Frequently asked questions
Who is Brandon Sack?
Brandon Sack is a private equity investor and venture capital investor based in New York, United States, listed as Investor at Addition. The known portfolio of that firm counts 17 companies. That portfolio belongs to the firm, not to Brandon Sack personally.
What does Brandon Sack invest in?
Listed sectors include AI, Commerce, Education and FinTech; listed focus areas include Analytics, Biotech, Cloud Infrastructure and Creator Economy. 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 Brandon Sack invest at?
Addition appears in Growth, Seed and Series A rounds across its known deals, and Brandon Sack is listed there as Investor. 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 Brandon Sack listed at?
Brandon Sack is listed as Investor at Addition. 7 other people in the database share a firm with Brandon Sack.
How do I contact Brandon Sack?
An email address and a LinkedIn page are on file for Brandon Sack. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal