What Isthmus Partners does

Isthmus Partners, LLC is a privately held, 100% employee-owned investment management and wealth advisory firm headquartered at One South Pinckney Street, Suite 800, Madison, Wisconsin. Founded in 2014 by three partners (Frank J. Gambino, Joel C. McNeil, and Victor E. Rodriguez) who previously co-built HGMR Investment Management, the firm manages more than $1 billion in assets across two client segments: institutional investors (public funds, corporations, foundations, endowments, and Taft-Hartley plans) and high-net-worth individuals and families with at least $2 million in investable assets. As of Q1 2026, the firm disclosed $593M in its Large Cap Core Equity strategy, $194M in its Small Cap Core Equity strategy, and $19M in its Small-Mid Cap Core Equity strategy, with all products managed from a single Madison office.

The firm's investment platform is built around ExRISM (Excess Return Identifier), a proprietary process that applies Economic Value Added (EVA) screening to identify sector-specific drivers of future excess return, layered on independent fundamental equity research. The product set spans three domestic equity strategies (Large Cap Core, Small-Mid Cap Core, Small Cap Core), fixed income management focused on U.S. Treasuries, FDIC-insured CDs, and high-quality municipal and corporate bonds, and an international equity sleeve implemented via third-party mutual funds and ETFs. Adjacent to investment management, the firm offers comprehensive financial planning (investment policy statement construction, portfolio allocation design) and ongoing wealth advisory services that coordinate with clients' external accounting and legal advisors, plus the Isthmus Pathways financial literacy program for younger generations.

The firm generates revenue primarily through recurring investment advisory fees on assets under management, supplemented by fees for financial planning and wealth advisory services. Distribution is conducted via direct relationship management rather than third-party intermediaries; the firm invests in top-of-funnel content marketing (Isthmus Forum blog, whitepapers, Isthmus Forum podcast) to attract both institutional and HNW prospects. The firm is SEC-registered (per its website Form CRS disclosure) and operated with a 19-person team at the time of input.

Name

Isthmus Partners

Legal name

Isthmus Partners, LLC

Website

https://isthmuspartnersllc.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

Isthmus Partners is a Madison, Wisconsin-based, 100% employee-owned investment management firm founded in 2014. It manages over $1 billion across domestic equity strategies, fixed income, and wealth advisory services for institutional investors and high-net-worth individuals with $2M+ in investable assets.

Ownership category

akta.pro rank

Product category

Investment Management

NAICS

Portfolio Management and Investment Advice (523940)

SIC

Investment Advice (6282)

akta.pro primary industry

Financial Planning–Led RIAs (FSAAACAB)

akta.pro secondary industries

Portfolio Management–Led RIAs (Discretionary/Model-Based) (FSAAACAC), Registered Investment Advisor (RIA) Wealth Management (FSAEABAA)

Keywords

• Investment management services
• Equity portfolio management
• Financial planning advisory
• Wealth management services
• Institutional asset management

Headquarters

HQ city

Madison

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Investment Advisory Fees: The firm charges fees for investment advisory and management services, typically based on assets under management (AUM). As a registered investment adviser, the firm provides ongoing portfolio management and investment oversight.
2. Financial Planning Services: The firm provides comprehensive financial planning services including investment policy statement creation, portfolio allocation design, and ongoing financial advisory services.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Isthmus Partners is a registered investment adviser that provides active domestic equity portfolio management through three core strategies (Large Cap Core, Small-Mid Cap Core, and Small Cap Core Equity) for institutional investors, alongside fixed income management, international allocation via third-party funds, financial planning, and wealth advisory services for high-net-worth individuals and families. The firm employs a proprietary ExRISM investment process built on Economic Value Added (EVA) principles to identify high-quality companies with sector-specific drivers of future excess return.

Product overview

Isthmus Partners operates as an investment management and financial advisory firm offering three core domestic equity strategies (Large Cap Core, Small-Mid Cap Core, and Small Cap Core Equity) alongside complementary fixed income and international stock services managed through third-party funds. The firm's integrated service model combines financial planning, investment management, and wealth advisory services, with additional educational programming through its Pathways next-generation initiative. The company serves both institutional investors (public funds, foundations, endowments, Taft-Hartley plans) and high-net-worth individuals and families with at least $2 million in investable assets.

Differentiator

Problem solved

Functional benefit

Brands

• Isthmus Pathways: A program designed to empower the next generation with skills and knowledge to make informed decisions about money.

Products and services

• Large Cap Core Equity Strategy Domestic equity strategy targeting the S&P 500 Index benchmark, holding 40-45 securities with expected turnover of 15-25% and $593 million in total product assets as of Q1 2026, designed for institutional investors seeking competitive long-term performance.
• Small-Mid Cap Core Equity Strategy Domestic equity strategy targeting the Russell 2500 Index benchmark, holding 55-60 securities with expected turnover of 25-30% and $19 million in total product assets as of Q1 2026, designed for institutional investors seeking small-mid cap exposure.
• Small Cap Core Equity Strategy Domestic equity strategy targeting the Russell 2000 Index benchmark, holding 60-65 securities with expected turnover of 25-30% and $194 million in total product assets as of Q1 2026, designed for institutional investors seeking small cap exposure.
• Fixed Income Management Fixed income portfolio management service focusing on U.S. Treasury and FDIC-insured certificates of deposit, along with highest-quality municipal and corporate bonds, structured to align with specific client risk tolerances.
• International Stock Strategy International equity allocation service utilizing third-party managed mutual funds and ETFs rather than individual securities, with the firm monitoring and evaluating third-party international managers on behalf of clients.
• Financial Planning Comprehensive personalized financial planning service for individuals and families, building investment policy statements that govern portfolio allocation and adapt as client life circumstances change over time.
• Wealth Advisory Ongoing wealth advisory service providing continual care, capital preservation during financial crises, and participation in market growth opportunities over the long-term, including coordination of accounting and legal expert relationships for clients.

Quantifiable outcome

• Low turnover (15-25% for Large Cap, 25-30% for Small-Mid Cap and Small Cap) relative to mutual fund averages
• +1 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Geneva Capital Management: Wisconsin-based active equity manager with strategies across multiple market caps and a similar institutional and HNW client mix. Most directly comparable by geography, size, and active-equity product set.
• Vaughan Nelson Investment Management: Houston-based active U.S. equity manager running small-cap, mid-cap, and large-cap value strategies for institutional and HNW clients. Comparable by strategy breadth, AUM scale, and client segmentation.
• Edgar Lomax Company: Virginia-based active equity manager with a long-tenured team running large-cap and small-cap strategies for institutional clients. Comparable by independent, employee-owned structure and active equity focus.
• BBR Partners: New York-based multi-family office providing integrated investment management, financial planning, and wealth advisory to ultra-high-net-worth families. Comparable by integrated planning-led RIA model and HNW focus; Maggie McNeil joined Isthmus from BBR, signaling direct talent overlap.
• Johnson Investment Counsel: Cincinnati-based RIA offering active domestic equity strategies (including large cap and small-mid cap) to institutional and high-net-worth clients. Highly comparable operating model with discretionary portfolio management, financial planning, and a similar client segmentation between institutions and HNW families.
• Ancora Holdings: Cleveland-based RIA offering active equity, fixed income, and wealth advisory services to institutional and high-net-worth clients. Highly comparable integrated model combining portfolio management and financial planning.
• Tributary Capital Management: Colorado-based active small- and mid-cap equity manager serving institutional clients. Comparable by active small/mid-cap equity strategy focus and institutional client base.
• Riverbridge Capital Partners: Minneapolis-based active U.S. equity manager with multi-cap strategies primarily serving institutional clients. Comparable by active equity philosophy, AUM scale, and concentration in equity strategies.

Broad incumbents

• Mesirow Financial: Chicago-based diversified financial services firm with active equity investment management, wealth advisory, and institutional services. Comparable by integrated investment-and-planning model and Midwest footprint, though operating at substantially larger scale.
• Robert W. Baird (Wealth Management): Large Midwest-based wealth manager and parent of Baird Investment Management, where several Isthmus partners previously worked. Comparable by Wisconsin roots and overlapping HNW client base, but operates at materially larger scale with a much broader product set.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/isthmus-partners-llc

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 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 Isthmus Partners