Jonathan Seiffer is an Investor at Leonard Green & Partners, whose known portfolio counts 9 companies.
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Investment focus
- Stage
- Late-Stage
Contacts
Affiliated funds' portfolios
Investor at Leonard Green & Partners, whose known portfolio counts 9 companies
- Vital Care
- MedVet
- Fullscript
- RedSail Technologies
- HUB International
- Pye-Barker Fire & Safety
- Mister Car Wash
- Prometheus Group
- Williams-Sonoma
Investor Profile
Leonard Green & Partners appears in Late-Stage rounds across its known deals.
The firm portfolio and the focus above give founders context on whether Jonathan Seiffer matches their raise.
Frequently asked questions
Who is Jonathan Seiffer?
Jonathan Seiffer is a private equity investor based in Manhattan Beach, California, United States, listed as Investor at Leonard Green & Partners. The known portfolio of that firm counts 9 companies. That portfolio belongs to the firm, not to Jonathan Seiffer personally.
What stage does Jonathan Seiffer invest at?
Leonard Green & Partners appears in Late-Stage rounds across its known deals, and Jonathan Seiffer 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 Jonathan Seiffer listed at?
Jonathan Seiffer is listed as Investor at Leonard Green & Partners, whose known portfolio counts 9 companies.
How do I contact Jonathan Seiffer?
An email address, a phone number and a LinkedIn page are on file for Jonathan Seiffer. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal