Montague Street Capital

What Montague Street Capital does

Montague Street Capital operates through Montague Street Private Partners (MSPP), the private equity strategy of the Greenblatt Family Office. Founded in 2017 by William Greenblatt and headquartered in New York, the firm acquires and operates small businesses in the business services sector, with a stated preference for "must have" services generating recurring revenue and positive cash flow. Unlike traditional private equity, MSPP deploys family office assets rather than financial leverage, operates without a fixed fund life, and holds portfolio companies on a multi-generational basis.

The portfolio spans 7 wholly-owned operating subsidiaries and more than 10 minority investments. Operating holdings include Sterling (employment screening, serving 25,000+ clients globally since 1975), Precision Reporters and Action Reporting (stenographic court reporting in Central New York), openDoctor (patient scheduling), Remote Legal (remote deposition and court reporting), Field Control Analytics (worker productivity analytics, acquired out of bankruptcy in 2020), and Fairygodboss (women-in-workplace community). Minority stakes span cybersecurity, global mobility, domain registry, digital media, education, pharmacy management, earned wage access, media intelligence, and private aviation. No underlying technology platform, proprietary software product, or pricing model is disclosed; revenue and financial statements are not publicly available.

MSPP's commercial model rests on long-duration capital deployment, operational knowledge transfer, and roll-up activity within fragmented business services verticals. The firm does not charge management fees to external LPs — returns are generated through portfolio company growth and operational value creation. Leadership is concentrated within the Greenblatt family (William as Chairman/Co-Founder; sons Jake and Brandon as Co-Founders), supplemented by operating partners such as Reid Rubinstein (CEO of Field Control Analytics) and a Controller.

Name

Montague Street Capital

Legal name

Montague Street Private Partners

Website

https://montaguestreetprivatepartners.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

11–50 employees

Short description

Montague Street Private Partners is the Greenblatt Family Office's private equity strategy, founded in 2017, that acquires and operates small, recurring-revenue business services companies for multi-generational ownership using patient family-office capital rather than traditional PE leverage.

Ownership category

akta.pro rank

Product category

Private Equity / Family Office Investment

NAICS

Portfolio Management and Investment Advice (52394)

SIC

Investment Advice (6282)

akta.pro primary industry

Family Office Investment Platforms & Direct Investing (PE/VC/Co-Invest) (FSAAADAH)

Keywords

• Family office investing
• Private equity strategy
• Growth equity investments
• Business services acquisitions
• Long-term capital deployment

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, Others

Revenue model

1. Investment Returns / Portfolio Company Operations: Montague Street Private Partners operates as the private equity strategy of the Greenblatt Family Office. The firm deploys family office assets to support and grow portfolio companies through growth equity investments or full buyouts of small businesses in the business services sector. Unlike traditional private equity with fixed fund life, they maintain long-term ownership across multiple generations, generating returns through portfolio company growth and operational value creation.

Core offering

Montague Street Private Partners (MSPP), the private equity strategy of the Greenblatt Family Office, provides long-term capital and operational expertise to small businesses in the business services sector through growth equity investments or full buyouts. The firm owns and operates portfolio companies rather than reselling or distributing third-party products, and targets fragmented industries with recurring-revenue, "must-have" services.

Differentiator

Problem solved

Functional benefit

Products and services

• Sterling Employment screening and hiring solutions helping employers make confident people decisions; serves 25,000+ clients globally.
• Precision Reporters Stenographic court reporting services preserving the record for legal clients in Syracuse and Central New York since 1983.
• Action Reporting Innovative and cost-effective court reporting services with 30+ employees, serving clients in Syracuse and Central New York since 1984.
• Fairygodboss Professional community for women to review companies and share job information.
• openDoctor Real-time patient engagement and patient access platform for scheduling.
• Field Control Analytics Worker data analytics and productivity technology for job sites.
• Remote Legal Remote deposition platform and court reporting services for legal proceedings.
• Andover National Corporation Public holding company engaged in essential services that acquires majority interests in private businesses.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Trinity Hunt Partners: Lower-middle-market PE firm focused on founder-led business services companies in fragmented industries. Directly comparable thesis around partnering with operators and building market leaders.
• New Mountain Capital: Growth-oriented middle-market PE firm with deep focus on business services and information services. Comparable to MSPP in targeting defensive, recurring-revenue service businesses in fragmented markets.
• Stone Point Capital: Lower-middle-market private equity firm with a longstanding focus on business and financial services. Targets founder- and family-owned businesses with recurring revenue — directly comparable to MSPP's stated thesis.
• Audax Group: Middle-market private equity firm focused on buy-and-build platforms across business services and consumer services. Comparable on lower-middle-market focus and fragmented-industry roll-up thesis.
• Huron Capital Partners: Lower-middle-market PE firm focused on fragmented, founder-led business services companies with recurring revenue. Comparable sector focus and founder-partnering approach.
• Pritzker Private Capital: Family-office-backed private equity firm investing in middle-market operating companies, often partnering with founders and management for the long term. Most directly comparable to MSPP's permanent-capital, lower-middle-market, business-services focus.
• Waud Capital Partners: Lower-middle-market private equity firm investing in business services, healthcare services, and industrial companies, often partnering with operators. Comparable in size band, sector focus, and approach to founder-led businesses.
• Alpine Investors: People-driven lower-middle-market PE firm focused on services and software businesses, with an emphasis on operating talent and long-term value creation. Comparable target sectors and approach to owner-operators.
• Markel Ventures: Permanent-capital acquisition arm of Markel Corporation, investing in operating businesses for the long term. Closely aligned with MSPP's family-office/holding-company model of long-duration, multi-generational ownership.

Broad incumbents

• Berkshire Hathaway: Broad incumbent with a permanent-capital, hold-forever acquisition philosophy across services and industrial businesses. Larger and more diversified than MSPP but operates with the same long-duration, no-fund-life discipline that defines MSPP's family-office model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks2 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries18 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Montague Street Capital