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Mad River Investors

Updated today

Client assets under management

$287,888,038

Clients

89

76% high-net-worth

Advisors

4

of 6 employees

Firm type

Supported

1-4 advisors or >$200M in AUM

Clients per advisor

22

Low

Average account size

$3,234,697

About

Mad River Investors serves individuals, high‑net‑worth clients, companies, and trusts through discretionary separately managed accounts (the Managed Opportunities program) and, as general partner and investment adviser, through the private partnership Long Point Investors, L.P., which is offered only to accredited and qualified investors. As of early 2026 the firm reports managing roughly $333.8 million in Managed Opportunities and $69.7 million in Long Point and provides portfolio management, sub‑advisory services, and fund management for pooled vehicles.

The firm follows an opportunistic, long‑term, equity‑oriented approach that typically concentrates portfolios in about 20–30 positions and accepts material short‑term volatility; portfolios may include covered options, long puts/calls, preferreds, convertibles, corporate and high‑yield bonds, distressed securities, foreign securities, short sales, and a modest allocation to digital assets such as Bitcoin. Mad River selects and oversees third‑party managers (notably a sub‑advisory relationship with Horizon Asset Management) and emphasizes that principals invest alongside clients.

Distinctive aspects disclosed in the brochure include Mad River’s role as general partner and adviser to a long‑running private fund (Long Point, formed in 1992) with fund administration and annual audits in place, its presentation of a firm Model and historical performance (net of fees) dating to the Managed Opportunities inception in 1999, and an alternative performance‑based fee option for qualified clients (an asset fee plus a 5% performance fee using a high‑water mark and a Loss Recovery Account). The firm also discloses potential conflicts tied to owner‑operator investments (for example, holdings in FRMO) and the material reliance on Horizon’s services for managing the Model.

Client services

Portfolio management Selection of other advisers

Expertise

Private / alternative investments Concentrated stock management Options & derivatives strategies

Occupation focus

Executive Founder/Business Owner

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Fee options

Percentage

$0+: 1.5% annually $0+: 1.0% annually (for clients opting for performance-based fee schedule)

Performance-based

5% of investment returns (realized and unrealized) for qualified Managed Opportunities clients opting for performance-based fee schedule, subject to high-water mark.

Other

Account minimum: $500,000 Fee-only: 1.5% annually on assets managed for Managed Opportunities; negotiable fees possible; includes sub-advisor fees; 1.0% annually plus 5% performance fee on investment returns (realized and unrealized) for qualified clients opting for performance-based fees.

Main office location

Mad River Investors

84 State Street, Suite 1060

Boston MA 02109, United States

Number of offices

2

Most active in

Florida · Illinois · Massachusetts · New York · Pennsylvania

Disclosures

Exclamation point means they have disclosures of this type. Check mark means no disclosures of this type were found.

Business activities & affiliations

Advisors at this firm

user avatar

Stephen C

Series 65

Boston, MA

Mad River Investors

Stephen Carluccio is a financial advisor at Mad River Investors in Boston, MA, holding a Series 65 credential with 18 years of industry experience. He has been with Mad River Investors since 2012 and concurrently operates SCC Legal and Business Services, where he performs a limited amount of outside legal work for former clients with employer approval. Mad River Investors provides discretionary investment management to individuals, high-net-worth clients, companies, trusts, and other entities through its Managed Opportunities separate-account program and as general partner and advisor to Long Point Investors, L.P., a private partnership for accredited investors. The firm employs a concentrated, long-term equity-oriented approach with a range of strategies including contrarian and special-situation investments, digital assets, and hedging, managing approximately $338 million in assets across about 115 client relationships.

Private / alternative investments Concentrated stock management Options & derivatives strategies Executive Founder/Business Owner
user avatar

Michael G

Series 65

Saint Petersburg, FL

Mad River Investors

Michael Gagne is a financial advisor at Mad River Investors with a Series 65 designation and no prior industry experience. Before joining Mad River Investors, he held roles in sales and marketing strategy development as owner and CEO of Egmont LLC. Mad River Investors provides discretionary investment management to individuals, high-net-worth clients, companies, trusts, and other entities through its Managed Opportunities separate-account program and as general partner and investment advisor to Long Point Investors, L.P., a private partnership. The firm employs a concentrated, opportunistic, long-term equity-oriented approach with a focus on contrarian, special-situation, hedging, and emerging-asset strategies.

Private / alternative investments Concentrated stock management Options & derivatives strategies Executive Founder/Business Owner
user avatar

Joshua S

Series 63, Series 65

Boston, MA

Mad River Investors

Joshua Stewart is a financial advisor at Mad River Investors in Boston, MA, with 21 years of industry experience. He has been with Mad River Investors, operating as Mrm Horizon Advisors LLC, since 2002. He holds Series 63 and Series 65 licenses. Mad River Investors provides discretionary investment management to individuals, high-net-worth clients, companies, trusts, and other entities through its Managed Opportunities separate-account program and as general partner and investment advisor to Long Point Investors, L.P., a private partnership for accredited and qualified investors. The firm employs a concentrated, opportunistic, long-term equity-oriented approach and manages approximately $338 million in assets across about 115 client relationships.

Private / alternative investments Concentrated stock management Options & derivatives strategies Executive Founder/Business Owner
user avatar

Richard S

Series 63, Series 65

St Petersburg, FL

Mad River Investors

Richard Silver is a financial advisor with Mad River Investors in St. Petersburg, FL, holding Series 63 and Series 65 credentials and possessing 26 years of industry experience. He has been with Mad River Investors, formerly MRM-Horizon Advisors, LLC, since 1999. Mad River Investors provides discretionary investment management to individuals, high-net-worth clients, companies, trusts, and other entities through its Managed Opportunities separate-account program and as general partner and investment advisor to Long Point Investors, L.P., a private partnership. The firm employs a concentrated, opportunistic, long-term equity-oriented approach with a focus on contrarian, special-situation, hedging, and emerging-asset strategies, managing approximately $338 million in assets across about 115 client relationships.

Private / alternative investments Concentrated stock management Options & derivatives strategies Executive Founder/Business Owner
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