# CASTLE ISLAND MANAGEMENT, LLC

CASTLE ISLAND MANAGEMENT, LLC of BOSTON, MA is an SEC exempt reporting adviser.

## Registration

- CRD: 298999
- Type: SEC exempt reporting adviser
- SEC file number: 802-114283
- Location: 374 CONGRESS STREET, SUITE 301, BOSTON, MA, 02210
- Phone: 508-202-0432
- Latest filing: 2026-03-31

## Officers, owners & control persons (9)

| Name | Role | Location |
| --- | --- | --- |
| [Matthew P Walsh](https://search.stillhousedata.com/person/721108) | MANAGING MEMBER | — |
| [Nicolas Elliott Carter](https://search.stillhousedata.com/person/721109) | MANAGING MEMBER | — |
| [Gretchen Marie Mccarey](https://search.stillhousedata.com/person/721110) | CHIEF FINANCIAL OFFICER | — |
| [Sean Michael Judge](https://search.stillhousedata.com/person/721111) | MANAGING MEMBER | — |
| [MCCAREY GRETCHEN MARIE](https://search.stillhousedata.com/person/885502) | CHIEF FINANCIAL OFFICER | — |
| [WALSH MATTHEW P](https://search.stillhousedata.com/person/897553) | MANAGING MEMBER | — |
| [Carter Nicolas Elliott](https://search.stillhousedata.com/person/903293) | MANAGING MEMBER | — |
| [JUDGE SEAN MICHAEL](https://search.stillhousedata.com/person/905010) | MANAGING MEMBER | — |
| [Gus Peter Coldebella](https://search.stillhousedata.com/person/1024416) | CHIEF LEGAL OFFICER | — |


## Private funds (16)

_Showing 15 of 16 funds by gross asset value._

| Fund | Type | Formed | Owners | GAV | Min investment |
| --- | --- | --- | --- | --- | --- |
| CASTLE ISLAND VENTURES III, L.P. | Venture Capital Fund | Delaware | 127 | $213.6M | — |
| CASTLE ISLAND VENTURES III-A, L.P. | Venture Capital Fund | Delaware | 68 | $146.4M | — |
| CASTLE ISLAND VENTURES IV, LP | Venture Capital Fund | Delaware | 89 | $143.3M | — |
| CASTLE ISLAND VENTURES I, L.P. | Venture Capital Fund | Delaware | 47 | $134.7M | — |
| CASTLE ISLAND VENTURES II, L.P. | Venture Capital Fund | Delaware | 62 | $30.6M | — |
| CASTLE ISLAND VENTURES IV FEEDER, LP | Venture Capital Fund | Delaware | 11 | $26.1M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 9) | Venture Capital Fund | Delaware | 5 | $25.9M | — |
| CASTLE ISLAND VENTURES II-A, L.P. | Venture Capital Fund | Delaware | 39 | $20.4M | — |
| CASTLE ISLAND VENTURES I-A, L.P. | Venture Capital Fund | Delaware | 16 | $11.3M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 4) | Venture Capital Fund | Delaware | 13 | $11.3M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 8) | Venture Capital Fund | Delaware | 10 | $8.5M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 7) | Venture Capital Fund | Delaware | 3 | $6.5M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 6) | Venture Capital Fund | Delaware | 13 | $5.4M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 5) | Venture Capital Fund | Delaware | 70 | $2.5M | — |
| CIV OPPORTUNITY SERIES CO-INVEST I, L.P. - (SERIES 3) | Venture Capital Fund | Delaware | 11 | $2.3M | — |


## Fund service providers (1)

- administrator: JUNIPER SQUARE — 16 funds

## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/298999/brochure
- Similar advisers: https://search.stillhousedata.com/firm/298999/similar
- Related entities: https://search.stillhousedata.com/firm/298999/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/298999

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Source: public SEC Form ADV data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.