Longfellow Investment Management

What Longfellow Investment Management does

Longfellow Investment Management Co., LLC is a Boston-based, 100% employee-owned institutional investment management firm founded in 1986. The firm manages approximately $24 billion in assets under management across four strategy pillars: Fixed Income (spanning Enhanced Cash through Long Duration, Core Plus, Muni/Crossover, and TIPS), Equity (domestic, international, emerging markets, and global value and growth strategies), Alternatives/Absolute Return (Merger Arbitrage, SPACs, and Multi-Strategy), and Customized Solutions (liability-driven investing, ESG integration aligned with UN Sustainable Development Goals, and tax-sensitive strategies). The firm's investment approach is grounded in bottom-up fundamental analysis with a proprietary ESG scoring framework established in 2014 for fixed income credit research.

LIM serves institutional clients including corporations, public and private pension funds, endowments and foundations, healthcare and religious organizations, Taft-Hartley/multi-employer plans, banks and insurance companies, and family offices. Distribution is exclusively direct: there are no intermediaries or third-party distribution channels, and clients receive direct portfolio manager access. LIM is majority women-owned (over 51% of ownership held by women) and has been a certified Women's Business Enterprise through the Center for Women & Enterprise since 2010.

The firm is headquartered at 125 High Street, Oliver Tower, Suite 832, Boston, MA. As of April 2026, LIM employs approximately 52 people, 26 of whom are principals. Revenue is generated through asset-based management fees on separate accounts, with fee rates not publicly disclosed. The firm is GIPS compliant, a PRI signatory since 2014, a TCFD supporter since 2019, and has received multiple industry awards including PSN Top Guns Manager of the Decade for Core Plus Fixed Income (2023) and International Large Cap Equity (2026), as well as Pensions & Investments Best Places to Work in Money Management recognition in 2024 and 2025.

Name

Longfellow Investment Management

Legal name

Longfellow Investment Management Co., LLC

Website

https://longfellowim.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

11–50 employees

Short description

Longfellow Investment Management is a 100% employee-owned, majority women-owned Boston-based investment manager founded in 1986, managing approximately $24 billion across fixed income, equity, absolute return, and customized strategies for institutional investors, family offices, and high net worth individuals.

Ownership category

akta.pro rank

Product category

Institutional Asset Management

NAICS

Portfolio Management and Investment Advice (52394)

SIC

Investment Advice (6282)

akta.pro primary industry

Multi-Sector / Total Return Fixed Income (FSAAAHAJ)

akta.pro secondary industries

Multi-Strategy — Global Macro + Rates/FX Overlay (FSAHAFAC), Balanced & Allocation (Multi-Asset) Funds (FSAAAEAD), Large-Cap Equity (Active) (FSAAAIAA)

Keywords

• Institutional asset management
• Fixed income strategies
• Equity portfolio management
• Absolute return strategies
• ESG integration investing

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Asset Management Fees: LIM generates revenue through management fees based on assets under management (AUM). The firm manages fixed income, equity, absolute return, and alternative strategies for institutional investors and high-net-worth clients.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels8 records

Core offering

Longfellow Investment Management manages institutional investment portfolios across four core product lines: Fixed Income strategies (Enhanced Cash through Opportunistic and TIPS), Equity strategies (US, International, Emerging Markets, and Global), Alternatives/Absolute Return (Merger Arbitrage, SPACs, Multi-Strategy), and Customized Solutions (blended benchmarks, tax-sensitive, ESG, liability-driven, and treasury management). The firm delivers these strategies as separately managed accounts for institutional investors, family offices, and high net worth individuals, with direct portfolio manager access and customized investment guidelines.

Product overview

Longfellow Investment Management offers a multi-strategy investment management platform comprising four core product lines: Fixed Income (spanning Enhanced Cash through Opportunistic and TIPS strategies across various durations), Equity (covering US, International, Emerging Markets, and Global strategies across value and growth styles), Alternatives/Absolute Return (including Merger Arbitrage, SPACs, and Multi-Strategy offerings), and Customized Solutions (providing tailored benchmarks, tax strategies, ESG integration, liability-driven investing, and treasury management). These products work together as a unified investment platform serving institutional clients, family offices, and high net worth individuals with customized portfolios.

Differentiator

Problem solved

Functional benefit

Products and services

• Fixed Income Research-driven fixed income strategies spanning the maturity and quality spectrum for institutional clients, family offices, and high net worth individuals, including Enhanced Cash, Short Duration, Intermediate Duration, Core, Core Plus, Long Duration, Opportunistic, Government Only, Muni/Crossover, and TIPS strategies designed to protect assets from downside market risks.
• Equity Equity strategies covering domestic, international, emerging market, and global markets for institutional clients, including US Large Cap Value, International Large Cap Equity, Emerging Markets Large Cap Equity, Global Concentrated Value, US Quality Growth, Global Concentrated Quality Growth, and Midstream Energy strategies targeting strong risk-adjusted returns.
• Alternatives / Absolute Return Absolute return strategies combining top-down risk management with bottom-up security selection for institutional clients, including Merger Arbitrage, SPACs (Special Purpose Acquisition Companies), and Multi-Strategy offerings that seek positive returns with low realized volatility and low correlation to traditional markets.
• Customized Solutions Customized portfolio solutions for institutional clients, family offices, and high net worth individuals, including Blended and Custom Benchmarks, Taxable/Tax-Sensitive Strategies, Socially Responsible Investing, ESG Integration aligned with UN Sustainable Development Goals, Liability-Driven Investing, and Treasury Management Solutions tailored to specific client objectives, restrictions, and tax considerations.

Quantifiable outcome

• AUM growth from $700 million in 2005 to $23.7 billion as of March 2026
• +3 more outcomes

Named customers7 records

Segments7 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Two partnerships are on record, tiered core.

• Task Force on Climate-related Financial Disclosure (TCFD)coreStrategic or Co-development Partner · 1 January 2019LIM has been a supporter of TCFD since 2019, promoting accurate decision-useful disclosure of climate-related information including climate risks and carbon emissions associated with business operations.
• Principles for Responsible Investment (PRI)coreStrategic or Co-development Partner · 1 January 2014LIM has been a signatory to PRI since 2014, demonstrating commitment to incorporating ESG factors in investment decisions and contributing to a more sustainable global financial system. PRI assesses signatories annually based on responsible investment practices.

Scale indicators16 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Pzena Investment Management: Public, employee-owned, value-equity boutique managing global, international, and US value strategies for institutional clients. Comparable boutique scale, employee-ownership alignment, and institutional separate-account business model.
• Westwood Holdings Group: Mid-sized institutional asset manager offering multi-asset, equity, fixed income, and alternative strategies primarily to institutional clients. Similar boutique-to-mid scale and institutional distribution mix.
• Manning & Napier: Boutique multi-strategy manager offering equity, fixed income, and blended solutions to institutional and intermediary clients. Similar scale and customizable institutional separate-account approach.
• Eaton Vance Management: Boston-based, now part of Morgan Stanley Investment Management, offering fixed income, equity, and customized solutions for institutional and intermediary clients. Comparable scale, multi-strategy breadth, and Boston heritage mirror LIM's positioning.
• Loomis, Sayles & Company: Boston-based institutional asset manager with a deep fixed income platform and complementary equity and multi-asset strategies. Highly comparable as a Boston-headquartered fixed income specialist serving institutional clients with separate accounts and customized mandates.
• Breckinridge Capital Advisors: Boston-based fixed income specialist focused on investment-grade, tax-exempt, and ESG-aware strategies for institutional clients. Closely aligned with LIM's fixed income core and customized, tax-sensitive approach.
• Boston Partners: Mid-sized institutional value-oriented equity and fixed income manager serving pensions, endowments, and foundations. Similar boutique-to-mid-market positioning with a focus on fundamental active management for institutional separate accounts.
• Calvert Research and Management: ESG-led institutional asset manager (part of Morgan Stanley) offering fixed income, equity, and customized solutions to institutional clients. Closely parallels LIM's proprietary ESG framework and customized sustainable solutions.

Emerging players

• Trillium Asset Management: Boston-based ESG and impact-focused boutique serving institutional and intermediary clients with public equity and fixed income strategies. Comparable ESG specialization, Boston base, and institutional focus, though smaller in scale.

Broad incumbents

• Standish Mellon Asset Management: Large institutional fixed income manager within BNY Mellon Investment Management, with significant talent lineage overlap to LIM via former Standish, Ayer & Wood professionals. Relevant as a comparable fixed income platform and a key talent pipeline for LIM.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/longfellow-investment-management

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 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 Longfellow Investment Management