Organization · Private Equity
Summer Street Capital Partners
Summer Street Capital Partners is a private equity firm based in Buffalo, NY, focused on investing in small to mid-market companies across the United States and Canada. They specialize in buyouts and growth investments, particularly in the environmental services sector.
Overview
What Summer Street Capital Partners does
What Summer Street Capital Partners is
Summer Street Capital Partners is a private equity firm based in Buffalo, NY, focused on investing in small to mid-market companies across the United States and Canada. They specialize in buyouts and growth investments, particularly in the environmental services sector.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Private Equity
- Founded
- Founded in 1999
- Approximate age
- About 27 years
- Structured capabilities
- Funder
- Last reviewed
- March 4, 2026
Official channels
Find Summer Street Capital Partners elsewhere
Open the official website or a supported primary organization account.
Capability profile
Summer Street Capital Partners as a funder
Investment thesis
Summer Street Capital specializes in equity investments in the environmental services sector, targeting companies with annual revenues over $10 million. They engage in various transaction scenarios including buyouts and growth financing.
Focus narrative
Summer Street Capital specializes in equity investments, particularly in the environmental services sector, which includes solid waste collection, recycling, industrial waste, wastewater treatment, and medical waste. The firm typically engages in buyouts, growth financing, recapitalizations, family transitions, and corporate divestitures.
Terms and economics
- Typical check
- $10,000,000
Focus and fit
- Stages
- Growth Equity · Recap
- Sectors
- Climate & Sustainability
- Regions
- North America
Availability
- Currently deploying
- Not published
Portfolio and track record
- Recorded portfolio count
- 5
Portfolio context
Notable portfolio companies include: Coastal Waste & Recycling: A provider of solid waste disposal and recycling services in South Florida. Dwellworks: A business services provider that supports relocation management companies. Interstate Waste Services: An independent provider of waste management services. Multisorb: A manufacturer of sorbent and specialty products for various industries. Curtis Bay Medical Waste: A provider of medical waste transportation and disposal services.
Common questions
What to know about Summer Street Capital Partners
Upseed classifies Summer Street Capital Partners under the Private Equity organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
March 4, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.