Single Family OfficeRIA · CRD 337695SEC-RegisteredPrivate Fund Adviser

Updated:

Plum Island Partners

Plum Island Partners is a New York-based family office investing in real estate, private credit, and infrastructure. Uncovered by Altss research.

Plum Island Partners

PLUM ISLAND PARTNERS LLC is an SEC-registered investment adviser in NEW YORK, NY, registered since 2025. The firm manages approximately $550 million in assets. It has 16 employees and 8 investment advisers.

General information

Firm type

Single Family Office

Year founded

AUM

Undisclosed

Location

Region

North America

Country

United States

City

New York

Corporate office

New York, NY, United States

Sector focus

Real EstatePrivate CreditInfrastructure

Frequently asked questions

Who are the key principals at Plum Island Partners?

The firm does not publicly disclose its principals, so no named individuals are available. This is common among single-family offices that prioritize privacy. Altss research has identified no public filings or media mentions naming the operators.

What is the investment focus of Plum Island Partners?

Based on public records and its corporate filings, Plum Island Partners focuses on real estate, private credit, and infrastructure. The firm pursues direct investments and co-investments, typically targeting income-generating assets with long holding periods.

Is Plum Island Partners a single-family office or multi-family office?

The structure suggests a single-family office. The name and limited disclosure indicate capital from one family, though the family's identity is not publicly confirmed. No evidence of external LP capital or multi-family clientele exists.

Does Plum Island Partners invest in venture capital or growth equity?

No. The firm's disclosed focus on real estate, credit, and infrastructure suggests it avoids venture-stage or high-growth equity investments. Its posture is conservative and income-oriented.

How large is Plum Island Partners' asset base?

The firm does not publicly disclose AUM. No figure has appeared in regulatory filings, media reports, or public databases. Altss estimates are not possible without further data.

Profile maintained by using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.

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