Summer Street Capital Partners
- Company typePrivate
- Founded1999
- HeadquartersBuffalo, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
Summer Street Capital Partners firmographics
Firmographics- Name
- Summer Street Capital Partners
- Legal name
- Summer Street Capital Partners LLC
- Website
- https://summerstreetcapital.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
Summer Street Capital Partners industry classification
Industry- Product category
- Private Equity / Middle-Market Investment
- NAICS
- Other Financial Investment Activities (5239), Other Investment Pools and Funds (5259), Funds, Trusts, and Other Financial Vehicles (525)
- SIC
- Investment Advice (6282)
- akta.pro primary industry
- Business Services (B2B) Growth Equity (FSANACAD)
- akta.pro secondary industry
- Sustainable Private Markets (Impact PE/VC, Private Credit, Infrastructure) (FSAAALAG)
Keywords
Where Summer Street Capital Partners is headquartered
LocationHeadquarters
- HQ city
- Buffalo
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Summer Street Capital Partners business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Others
Revenue model
- Fund Management Fees and Carried Interest: Summer Street Capital generates revenue through traditional private equity fund management structures, including management fees on committed capital and carried interest (performance fees) on investment returns. The firm has raised three institutional funds, with their third fund (Summer Street Capital III, L.P.) raising approximately $280 million in 2013, exceeding their $250 million target. Total committed capital exceeds $550 million across all funds.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Summer Street Capital Partners product offering
Product offeringCore offering
Summer Street Capital Partners is a private equity firm that provides equity capital to middle-market companies, typically investing $10–$40 million per transaction alongside management teams. Their capital supports management buyouts, recapitalizations, growth financings, family transitions, and corporate divestitures, with a sector focus on environmental services (solid waste, recycling, medical waste), niche manufacturing, and route-based business services. The firm partners with operators to execute buy-and-build strategies across underserved geographies in the US and Canada.
Product overview
Summer Street Capital Partners is a private equity investment firm offering equity capital and partnership services to middle-market companies. Their core offering is investment capital for buyouts, growth financing, recapitalizations, family transitions, and corporate divestitures. They focus on three primary sectors: environmental services (solid waste collection, recycling, medical waste), manufacturing, and business services. The firm typically invests $10-$40 million in companies with revenue greater than $10 million annually across the US and Canada. Summer Street provides portfolio companies with not only capital but also operational support including organizational development, customer satisfaction initiatives, lean manufacturing, and executive coaching. Their portfolio includes multiple solid waste platforms (Coastal Waste & Recycling, Frontier Waste Solutions, Interstate Waste Services), medical waste services (Curtis Bay Medical Waste Services), manufacturing companies (Multisorb Technologies, Ira Green, Halco Lighting, etc.), and business service companies (Dwellworks).
Differentiator
Problem solved
Functional benefit
Products and services
- Private Equity Investment Services Equity capital investment services for middle-market companies, typically investing $10–$40 million to support management buyouts, family transitions, corporate divestitures, growth financings, and recapitalizations. The firm partners with management teams who retain meaningful equity interests and provides operational resources including organizational development, customer satisfaction initiatives, lean manufacturing support, and executive coaching.
- Environmental Services Sector Investment Focused private equity investment in solid waste collection and post-collection, recycling, industrial waste, wastewater treatment, and medical waste sectors, executing buy-and-build strategies to transform local providers into regional leaders through over 50 add-on acquisitions.
- Manufacturing Sector Investment
Quantifiable outcome
- 50% increase in EBITDA over 3.5 year period at Multisorb Technologies
- +3 more outcomes
Companies that use Summer Street Capital Partners
Customer profileNamed customers8 records
Segments3 records
Ideal customer profiles2 records
Summer Street Capital Partners technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Summer Street Capital Partners partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and flagship.
- Brown Gibbons Lang & CompanycoreBrown Gibbons Lang & Company acted as lead transaction advisor to Frontier, Concentric, and Summer Street on the sale to GFL Environmental.
- Alvarez & MarsalcoreAlvarez & Marsal acted as financial advisor to Frontier, Concentric, and Summer Street on the sale to GFL Environmental.
- A&O ShearmancoreA&O Shearman acted as lead counsel to Frontier, Concentric, and Summer Street on the sale to GFL Environmental.
- Houlihan LokeycoreHoulihan Lokey acted as lead financial advisor to Coastal Waste & Recycling, Summer Street, and CEP on the exit of their Coastal investment to Macquarie Asset Management.
- Winston & StrawncoreWinston & Strawn acted as legal counsel to Coastal, Summer Street, and CEP on the exit of their Coastal investment to Macquarie Asset Management.
- Concentric Equity PartnersflagshipConcentric Equity Partners (the direct investing arm of Financial Investments Corporation, a family office with over $2.5 billion in investment commitments) and Summer Street Capital have a 20-year working relationship. They partnered on forming and building both Coastal Waste & Recycling and Frontier Waste Solutions. Concentric focuses on route-based service businesses serving residential, commercial, and industrial customers.
- Sixpoint PartnerscoreSixpoint Partners served as Summer Street's exclusive financial advisor on the Coastal Waste & Recycling continuation fund transaction.
- StifelcoreStifel managed the competitive auction for Curtis Bay Medical Waste Services, which Summer Street sold to Aurora Capital Partners.
- Baird (Robert W. Baird & Co.)coreBaird's Global Investment Banking Group acted as financial advisor to Summer Street Capital on the sale of both Multisorb Technologies and Dwellworks portfolio companies.
- Mooreland PartnerscoreMooreland Partners LLC acted as exclusive financial advisor to Full Spectrum Laser LLC in connection with the $10 million growth equity investment from Summer Street Capital.
Scale indicators4 records
Recent moves13 records
Expansion highlights4 records
Summer Street Capital Partners competitors and assessment
Company assessmentDirect peers
- Concentric Equity Partners: Family-office backed direct investing arm that has co-invested alongside Summer Street in Coastal Waste & Recycling and Frontier Waste Solutions for ~20 years. Concentric shares Summer Street's route-based service business focus and lower middle market check size.
- Aurora Capital Partners: Los Angeles-based middle-market PE firm that acquired Curtis Bay Medical Waste Services from Summer Street in 2021. Comparable check sizes and sector mix including industrials and business services.
- Arsenal Capital Partners: Middle-market PE firm investing in business services, industrial, and healthcare companies with comparable equity check sizes to Summer Street. Overlapping environmental services and route-based business exposure.
- Wynnchurch Capital: Middle-market PE firm with similar AUM scale and operational improvement playbook focused on industrial, services, and consumer businesses. Comparable transaction size range and sector overlap.
- HCI Equity Partners: Lower middle market PE firm investing in services, distribution, and industrial businesses with equity checks in Summer Street's range. Overlap in route-based and recurring-revenue business models.
- Trinity Hunt Partners: Lower middle market growth-oriented PE firm partnering with founders and management teams. Similar check sizes, sector mix in business services, and partnership-based investment approach.
- Avista Capital Partners: Middle-market PE firm focused on healthcare, industrial, and consumer services with comparable fund sizes and partner-led model. Direct overlap in healthcare-adjacent portfolio like Curtis Bay Medical Waste.
- Sterling Group: Houston-based middle market PE firm focused on industrial, distribution, and services businesses with similar check sizes and operating-focused value creation thesis.
- Littlejohn & Co. Middle-market PE firm that co-invested alongside Summer Street in the Interstate Waste Services merger. Comparable sector mix in industrial services and business services with similar transaction sizes.
- PA Capital (Private Advisors): Specialized private investment firm managing over $6 billion that led Summer Street's 2021 continuation fund for Coastal Waste & Recycling. Comparable lower middle market focus with strong continuation fund capability.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Summer Street Capital Partners social profiles
Digital presenceSummer Street Capital Partners financial estimates
Financial estimateRevenue estimate
Valuation estimate
Summer Street Capital Partners leadership team
Management profileNumber of profiles
Profiles7 records
Summer Street Capital Partners funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Summer Street Capital Partners M&A and investment
M&A and investmentM&A2 records
Investments13 records
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Summer Street Capital Partners
What does Summer Street Capital Partners do?
Summer Street Capital Partners is a private equity firm that provides equity capital to middle-market companies, typically investing $10–$40 million per transaction alongside management teams. Their capital supports management buyouts, recapitalizations, growth financings, family transitions, and corporate divestitures, with a sector focus on environmental services (solid waste, recycling, medical waste), niche manufacturing, and route-based business services. The firm partners with operators to execute buy-and-build strategies across underserved geographies in the US and Canada.
Is Summer Street Capital Partners a public or private company?
Summer Street Capital Partners is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Summer Street Capital Partners founded?
Summer Street Capital Partners was founded in 1999. It employs 11 to 50 people.
Where is Summer Street Capital Partners based?
Summer Street Capital Partners is headquartered in Buffalo, United States, in the North America region.
How does Summer Street Capital Partners make money?
One revenue line is on record: fund Management Fees and Carried Interest.
Who are Summer Street Capital Partners's main competitors?
Direct peers on record are Concentric Equity Partners, Aurora Capital Partners, Arsenal Capital Partners, Wynnchurch Capital, HCI Equity Partners, Trinity Hunt Partners, Avista Capital Partners, Sterling Group, Littlejohn & Co. and PA Capital (Private Advisors).
Does Summer Street Capital Partners have an API?
No public API is recorded for Summer Street Capital Partners.
What industry is Summer Street Capital Partners in?
Summer Street Capital Partners's product category is Private Equity / Middle-Market Investment. Its primary akta.pro industry code is FSANACAD, Business Services (B2B) Growth Equity, with a secondary code of FSAAALAG, Sustainable Private Markets (Impact PE/VC, Private Credit, Infrastructure). Its NAICS code is 5239 and its SIC code is 6282.