Form D · Venture Capital Fund

Castle Island Ventures IV, L.P.

Boston, MA · CIK 0002060993

Offering snapshot reported Sep 29, 2025 · SEC filing

Reported sold: Yet to sell
Investors reported: 0
Minimum accepted: $0
First sale: Yet to occur

What changed?

Latest filing versus its linked predecessor, where available.

No comparable changes in the displayed metrics.

Filing history

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Filed	Filing type	Reported sold	Change vs linked filing	Investors	Source
Sep 29, 2025	Initial	Yet to sell	No comparison	0	SEC filing

Offering details

Securities: Pooled investment fund
Exemptions: 06b, 3C, 3C.7
Duration over one year: No
Business combination: No

Sales commissions: $0
Finders' fees: $0
Form D file number: 021-559173

Source: Form D, filed Sep 29, 2025. Minimum accepted may differ from a standard advertised minimum.

Fund connections

The linked fund shows its most recently reported ADV details.

Matched by reported Form D file number

CASTLE ISLAND VENTURES IV, LP

Investment adviser: CASTLE ISLAND MANAGEMENT, LLC

Gross asset value: $143M
Beneficial owners: 89
ADV minimum commitment: $0

Reported in Form ADV on Mar 31, 2026. Fund assets and beneficial owners measure different things from Form D sales and investors.

Service providers

Fund administrator JUNIPER SQUARE SAN FRANCISCO, California, United States Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor CBIZ CPAS P.C. BOSTON, Massachusetts, United States

Custodian CITIZENS PRIVATE BANK RIVERSIDE, Rhode Island, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

CBIZ CPAS P.C.
PCAOB 199

Filing source

Form ADV 2079262 · Mar 31, 2026 · Schedule D 7.B.(1), fund 805-9934911948

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Related funds

Funds whose names form a numbered series with this one and that share its city or the name of a related person. Form D does not state how these funds are related.

Fund	Latest Form D	Reported sold	Investors
Castle Island Ventures I, L.P.	Jun 21, 2018	Yet to sell	0
Castle Island Ventures IV, L.P. (this fund)	Sep 29, 2025	Yet to sell	0

People & organizations

Current and past Form D appearances. These existing records do not establish a person's current role or uniquely identify them across issuers.

People and organizations reported in Form D filings
Name	Reported role
Nicolas Carter	Executive
General Partner Castle Island Gp Iv, Llc	Promoter
Management Company Castle Island Management, Llc	Promoter
Sean Judge	Executive
Matthew Walsh	Executive

Issuer details

Industry: Pooled Investment Fund (See others in industry)

Address:

374 Congress Street, Suite 301
Boston, MA, 02210