# SUNRIVER MANAGEMENT LLC

SUNRIVER MANAGEMENT LLC of GREENWICH, CT is an SEC-registered investment adviser.

## Registration

- CRD: 281277
- Type: SEC-registered investment adviser
- SEC file number: 801-106651
- Location: 2 SOUND VIEW DRIVE, 2ND FLOOR, GREENWICH, CT, 06830
- Phone: (203) 900-3900
- Latest filing: 2026-03-30
- Regulatory AUM: $1.2B
- Discretionary AUM: $1.2B
- Clients: 9
- Accounts: 7

## Business model

- Compensation: % of AUM, Performance
- Clients served: Investment cos

## Officers, owners & control persons (6)

| Name | Role | Location |
| --- | --- | --- |
| Randolph Willett Cook | FOUNDER AND PORTFOLIO MANAGER; LIMITED PARTNER; MANAGING MEMBER | Stamford, CT |
| John Nmn Stadnyk | CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER; CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER | — |
| MORGAN OWAIN DAVID | CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER; CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER - REGISTRANT; CHIEF OPERATING OFFICER AND CHIEF COMPLIANCE OFFICER - REGISTRANT | — |
| MORGAN DEANN D | CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER | — |
| COOK RANDOLPH WILLETT | FOUNDER AND PORTFOLIO MANAGER; FOUNDER AND PORTFOLIO MANAGER - REGISTRANT; LIMITED PARTNER (+4 more) | — |
| STADNYK JOHN NMN | CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER; CHIEF FINANCIAL OFFICER AND CHIEF COMPLIANCE OFFICER - REGISTRANT; CHIEF FINANCIAL OFFICER - REGISTRANT | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/281277/brochure
- Similar advisers: https://search.stillhousedata.com/firm/281277/similar
- Related entities: https://search.stillhousedata.com/firm/281277/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/281277

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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.