What Stonybrook Capital does

Stonybrook Capital, LLC is a boutique investment banking and reinsurance brokerage firm founded in 2012 and headquartered at 122 East 42nd Street, New York. The firm operates exclusively in the insurance and reinsurance industry, serving middle-market insurance companies, mutual insurers, MGAs, and reinsurance intermediaries with three integrated service lines: investment banking advisory (M&A, capital raising, valuation, divestiture), reinsurance brokerage through its wholly-owned subsidiary Stonybrook Risk Management (a licensed reinsurance intermediary offering treaty reinsurance, MGA fronting, industry loss warranties, and legacy liability solutions), and alternative investments placement (insurtech funds, Funds at Lloyd's, surplus notes). Securities transactions are executed through Weild & Co. (member FINRA/SIPC).

The firm employs approximately 20 professionals across partner, managing director, VP, and analyst tiers, organized as a partner-led boutique with no proprietary technology product. Revenue is generated through professional services fees (advisory mandates, capital raises) and transaction-based commissions (reinsurance brokerage, placement agent fees), with no publicly disclosed pricing. Notable disclosed engagements include a $35 million senior unsecured note placement for Maine Mutual Group, a $30 million senior unsecured note for United Fire Group with Ares Alternative Credit, and a $20 million senior secured term loan for AM Specialty Insurance Company. The firm was ranked #2 behind Goldman Sachs in the S&P advisory league tables for 2022 and reported its best year ever in 2024.

Stonybrook differentiates through vertical specialization, an independent "no products to sell" advisory posture, and deep executive relationships built over more than a decade. Recent strategic activity has focused on senior talent acquisition (former AM Best CEO Matt Mosher as Strategic Advisor, board appointments of Peter McGuire and Paul Kneuer), geographic broadening (London and Bermuda partners), and renewal of its position as the only dedicated investment bank in NAMIC's membership.

Name

Stonybrook Capital

Legal name

Stonybrook Capital, LLC

Website

https://stonybrookcapital.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

11–50 employees

Short description

Stonybrook Capital is a boutique investment banking and reinsurance brokerage firm founded in 2012 that exclusively serves middle-market insurance companies, mutual insurers, MGAs, and reinsurance intermediaries with M&A advisory, capital raising, and treaty reinsurance services.

Ownership category

akta.pro rank

Product category

Investment Banking & Reinsurance Advisory

NAICS

Portfolio Management and Investment Advice (523940), Insurance Agencies and Brokerages (52421)

SIC

Investment Advice (6282)

akta.pro primary industry

P&C Reinsurance Brokerage (FSAOAHAG)

akta.pro secondary industry

Reinsurance Claims, Accounting & Contract Administration (Broker Services) (FSAOAHAI)

Keywords

• Investment banking services
• Reinsurance brokerage
• Insurance M&A advisory
• Capital raising advisory
• Reinsurance intermediary

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Investment Banking Advisory Fees: Fees earned for providing strategic advisory services including M&A transactions, capital raising (debt and equity), valuation analyses, and divestiture advisory to insurance and reinsurance clients. Securities transactions are executed through Weild & Co., member FINRA/SIPC.
2. Reinsurance Brokerage Commissions: Stonybrook Risk Management, a licensed reinsurance intermediary, earns commissions for treaty reinsurance placement, carrier partnerships, fronting arrangements for MGAs, industry loss warranties execution, and legacy liability solutions.
3. Placement Agent Fees: Fees for placing insurance-related funds including insurtech funds, Funds at Lloyd's, and surplus notes as a placement agent.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

Stonybrook Capital is a boutique investment banking and reinsurance advisory firm focused exclusively on the insurance and reinsurance industry. It delivers strategic advisory services including M&A advisory, capital raising (debt and equity), valuation analyses, and divestiture support, and operates Stonybrook Risk Management, a licensed reinsurance intermediary offering treaty reinsurance placement, fronting arrangements for MGAs, industry loss warranties, and legacy liability solutions. The firm also serves as a placement agent for insurance-related funds such as insurtech funds, Funds at Lloyd's, and surplus notes.

Product overview

Stonybrook Capital is a global investment banking and reinsurance advisory boutique offering three core service lines: Investment Banking Services (M&A advisory, capital raising, asset divestment, valuation), Reinsurance Brokerage through its Stonybrook Risk Management subsidiary (treaty reinsurance, carrier partnerships, fronting for MGAs, industry loss warranties, legacy liability solutions), and Alternative Investments (placement agent for Insuretech, Funds at Lloyds, and Surplus Notes). The firm focuses exclusively on the insurance and reinsurance industry and publishes periodic white papers and market outlook reports.

Differentiator

Problem solved

Functional benefit

Products and services

• Investment Banking Services Strategic advisory services for insurance and reinsurance clients including mergers and acquisitions, capital raising (debt and equity), divestiture of non-core assets, and valuation analyses. Securities transactions are executed through Weild & Co., member FINRA/SIPC.
• Reinsurance Brokerage (Stonybrook Risk Management) Licensed reinsurance intermediary providing treaty reinsurance placement, carrier partnerships and fronting arrangements for MGAs, industry loss warranties intelligence and execution, and legacy liability solutions.
• Alternative Investments Placement Agent Services Placement agent services for insurance-related funds including insurtech funds, Funds at Lloyd's, and surplus notes, supporting insurance clients with access to alternative capital pools.

Quantifiable outcome

• Ranked #2 behind Goldman Sachs in S&P advisory league tables for 2022
• +1 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core and minor.

• NAMIC (National Association of Mutual Insurance Companies)coreStrategic or Co-development Partner · 11 May 2026Stonybrook renewed its membership with NAMIC, reinforcing its long-standing commitment to the mutual insurance sector. Stonybrook stands apart as the only dedicated investment bank within NAMIC's membership, reflecting focused expertise and deep experience advising mutual insurers on strategic advisory and capital markets initiatives.
• Clear Blue Insurance CompanycoreChannel Partner/ Reseller/ Distributor · 25 April 2025Clear Blue Insurance Company partnered with NEC Specialty (brokered by Stonybrook) for a New York Contractors General Liability program. Clear Blue is a leading US Fronting Carrier group headquartered in Charlotte, North Carolina, with carriers domiciled in Texas and ability to write in all 50 states.
• Knight GroupminorStrategic or Co-development Partner · 7 November 2024Knight Group established a new partnership with First Surety Corp (subsidiary of Jacobs Financial Group) with support from Stonybrook Capital. First Surety also entered the trade credit reinsurance market with Stonybrook's support.
• AM Specialty Insurance CompanycoreStrategic or Co-development Partner · 1 November 2024Joseph M. Scheerer, CEO and Principal of Stonybrook Capital, was appointed to the board of AM Specialty Insurance Company as Non-Executive Director, strengthening the strategic relationship with this specialty insurance client.

Scale indicators6 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Houlihan Lokey: Independent global investment bank with a dedicated Insurance practice advising on M&A and capital raising — comparable in providing strategic advisory to insurance clients though at a much larger scale.
• Aon plc: Global professional services firm with a major reinsurance brokerage practice (Aon Reinsurance Solutions) and insurance M&A advisory — competes for the same insurance carrier and reinsurance mandates at the upper end of the market.
• Guy Carpenter & Company: Reinsurance broking and advisory arm of Marsh McLennan, specializing in reinsurance intermediary services and capital solutions for insurers — direct overlap with Stonybrook Risk Management's reinsurance brokerage and advisory offering.
• Willis Towers Watson (WTW): Global advisory, broking, and solutions firm with insurance and reinsurance advisory capabilities — overlaps with Stonybrook's investment banking and reinsurance brokerage services for insurance carriers.

Emerging players

• Keefe, Bruyette & Woods (KBW): Specialty investment bank focused on financial services with insurance sector expertise — comparable in providing M&A and capital markets advisory to insurance clients, particularly smaller and mid-cap carriers.
• Brown & Riding Insurance Services: Specialty insurance brokerage and advisory firm serving niche and excess & surplus lines — overlaps with Stonybrook's specialty insurance advisory work for MGAs and program managers.
• FTI Consulting: Global advisory firm with insurance industry consulting practice including transactions, restructuring, and strategic advisory — partial overlap with Stonybrook's strategic advisory and M&A work in the insurance sector.

Direct peers

• TigerRisk Partners: Boutique reinsurance and insurance-linked securities advisory and capital markets firm with a similar structure providing advisory, capital raising, and reinsurance solutions — closest direct peer given shared focus on middle-market reinsurance advisory.
• Howden Tiger: Reinsurance and ILS advisory platform formed via Howden's acquisition of TigerRisk capital markets capabilities — directly comparable reinsurance intermediary and capital advisory offering to insurance carriers.

Regional players

• Lockton Companies: World's largest independent insurance brokerage with growing advisory and capital markets capabilities for insurance clients — competes for MGA and specialty insurance mandates with broader geographic reach.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments6 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Stonybrook Capital