DFX Intelligence

Matthew P Walsh

Managing Memberat Castle Island Management, LLC· MA

As of 2026-09-23 · this person's identity; each section below carries its own date

Current roles: 2
Investments attributed: 0
Board seats: 0

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As of 2026-09-23 · this person's identity; each section below carries its own date

What matters now

2018
since
Managing Member at Castle Island Management, LLC since 1 May 2018.
Tenure says how settled this partner is at the firm.
FactForm ADV Schedule A and the firm's team pageFor Founders, LPsRoles →

Relationship network

1 connected entity

From the roles sources name this person in, the investments a source attributes to them, and the boards and funds Form D names them on.

Matthew P Walsh

Managing Member

Reading the network

Organization

Venture relationships are not scored. Each line names its claim: a round led or joined, a board seat or a filing that names the firm, a listing on a portfolio page (dated by when DFX saw it, never by when the investment was made), a disclosed LP commitment, or a co-investor pair counted from observed participations. Observed means a named source says so; Derived means DFX counted it from observed rows; Inferred means a match that may be wrong.

Darker lines were active in the last 24 months or are current; lighter lines are older or undated.

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Which companies and boards is Matthew P Walsh connected to?

How am I connected?

Name your firm, a company or a person, and DFX finds the published routes to Matthew P Walsh: a shared portfolio company or board, a prior employer, a co-investor, a shared LP or service provider. Every step is a filed or published record with its source; none is a guess about who knows whom.

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Drawing the relationship network…

Roles

1 current, 0 past

Castle Island Management, LLC Managing Member
May 1, 2018 to present · “Schedule A: WALSH, MATTHEW, P, MANAGING MEMBER, since 05/2018, ownership C, control person Y”
Fact Form ADV

Investments attributed to this person

No investment attributed yet. Attribution needs a source naming this person on the deal: a quote, a board seat, a portfolio page credit.

Board seats and vehicles

0 boards, 0 vehicles

None on record.

Timeline

1 dated entry: events, attributed deals, board seats and role changes

May 1, 2018
Joined Castle Island Management, LLC as Managing Member
Role began Fact Castle Island Management, LLC Form ADV