# SANDBOX HOLDINGS, LLC

SANDBOX HOLDINGS, LLC of CHICAGO, IL is an SEC exempt reporting adviser.

## Registration

- CRD: 167419
- Type: SEC exempt reporting adviser
- SEC file number: 802-77934
- Location: 200 N. GREEN STREET, FLOOR 3, C/O SANDBOX INDUSTRIES, CHICAGO, IL, 60607
- Phone: 312-243-4100
- Latest filing: 2026-03-25

## Officers, owners & control persons (22)

| Name | Role | Location |
| --- | --- | --- |
| [Christopher Zock](https://search.stillhousedata.com/person/111931) | MANAGING MEMBER | Boston, MA |
| [Matthew John Downs](https://search.stillhousedata.com/person/122882) | MANAGING MEMBER; MEMBER, CHIEF EXECUTIVE OFFICER | Maryland Heights, MO |
| [Nicholas Rosa](https://search.stillhousedata.com/person/489284) | MEMBER | Chicago, IL |
| [Robert Bernard Shapiro](https://search.stillhousedata.com/person/497091) | MEMBER | Chicago, IL |
| [Steven Engelberg](https://search.stillhousedata.com/person/499230) | MEMBER | Chicago, IL |
| [Jennifer Charity Naylor](https://search.stillhousedata.com/person/719882) | CHIEF FINANCIAL OFFICER | — |
| [Ariel Meeyun Choi](https://search.stillhousedata.com/person/719979) | GENERAL COUNSEL | — |
| [BROWN JOHN F](https://search.stillhousedata.com/person/749049) | MEMBER; MEMBER, MANAGER | — |
| [PHILLIPS ROY THOMAS](https://search.stillhousedata.com/person/811235) | MANAGER | — |
| [SHAPIRO HARRY BERNARD](https://search.stillhousedata.com/person/841551) | MANAGER; MANAGING MEMBER; MEMBER (+1 more) | — |
| [EISENBERG MAX BENJAMIN](https://search.stillhousedata.com/person/848389) | GENERAL COUNSEL; MANAGER; MEMBER, GENERAL COUNSEL | — |
| [NASHIF MARINA](https://search.stillhousedata.com/person/886314) | MEMBER | — |
| [ROSA NICHOLAS](https://search.stillhousedata.com/person/886315) | MANAGER; MANAGING MEMBER; MEMBER (+2 more) | — |
| [DOWNS MATTHEW JOHN](https://search.stillhousedata.com/person/886316) | MANAGER; MANAGING MEMBER; MEMBER, CHIEF EXECUTIVE OFFICER (+1 more) | — |
| [ENGELBERG STEVEN](https://search.stillhousedata.com/person/890642) | MANAGER; MEMBER; MEMBER, MANAGER | — |
| [HAGHGOOIE ANNAHITA](https://search.stillhousedata.com/person/892891) | MANAGER; MEMBER | — |
| [HAWES THOMAS](https://search.stillhousedata.com/person/892892) | MANAGER; MEMBER | — |
| [GIANNIS VANESSA ROLLINGS](https://search.stillhousedata.com/person/893009) | MANAGER; MEMBER, CHIEF FINANCIAL OFFICER | — |
| [LEUTHEUSER SHANNON MUDD](https://search.stillhousedata.com/person/895154) | GENERAL COUNSEL | — |
| [Naylor Jennifer Charity](https://search.stillhousedata.com/person/896517) | CHIEF FINANCIAL OFFICER | — |
| [Choi Ariel Meeyun](https://search.stillhousedata.com/person/903322) | GENERAL COUNSEL | — |
| [Zock Christopher](https://search.stillhousedata.com/person/906750) | MANAGING MEMBER | — |


## Private funds (1)

| Fund | Type | Formed | Owners | GAV | Min investment |
| --- | --- | --- | --- | --- | --- |
| BLUECROSS BLUESHIELD VENTURE PARTNERS III, LLC | Venture Capital Fund | Delaware | 35 | $457.2M | $2.0M |


## Fund service providers (1)

- administrator: ULTIMUS FUND SOLUTIONS LLC

## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/167419/brochure
- Similar advisers: https://search.stillhousedata.com/firm/167419/similar
- Related entities: https://search.stillhousedata.com/firm/167419/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/167419

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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.