# WATER ISLAND CAPITAL, LLC

WATER ISLAND CAPITAL, LLC of NEW YORK, NY is an SEC-registered investment adviser.

## Registration

- CRD: 113358
- Type: SEC-registered investment adviser
- SEC file number: 801-57341
- Location: 104 5TH AVENUE, NEW YORK, NY, 10011-6901
- Phone: 800-560-8210
- Latest filing: 2026-03-30
- Regulatory AUM: $1.2B
- Discretionary AUM: $1.2B
- Clients: 26
- Accounts: 7

## Business model

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

## Officers, owners & control persons (29)

_Showing 25 of 29 people._

| Name | Role | Location |
| --- | --- | --- |
| Christina Chew | SENIOR MANAGING PARTNER AND MANAGEMENT COMMITTEE MEMBER | — |
| Jonathon Thomas Hickey | CHIEF OPERATING OFFICER AND MANAGEMENT COMMITTEE MEMBER; SENIOR MANAGING PARTNER, CHIEF OPERATING OFFICER, AND MANAGEMENT COMMITTEE MEMBER | — |
| John Sabbott Orrico | LIMITED PARTNER; MANAGING MEMBER; MANAGING MEMBER, CO-CHIEF INVESTMENT OFFICER, AND MANAGEMENT COMMITTEE MEMBER | — |
| Justin Michael Dunleavy | MANAGEMENT COMMITTEE MEMBER | — |
| Philip Edward Channen | CHIEF COMPLIANCE OFFICER | — |
| Eric Michael Casadei | MANAGEMENT COMMITTEE MEMBER | — |
| Christopher John Plunkett | MANAGEMENT COMMITTEE MEMBER | — |
| Matthew James Osowiecki | CO-CHIEF INVESTMENT OFFICER; CO-CHIEF INVESTMENT OFFICER AND MANAGEMENT COMMITTEE MEMBER | — |
| HICKEY DANIEL THOMAS | CHIEF OPERATING OFFICER AND MANAGEMENT COMMITTEE MEMBER; MANAGEMENT COMMITTEE MEMBER | — |
| HEMBERGER MATTHEW | ELECTED MANAGER; ELECTED MANAGER/ CHIEF COMPLIANCE OFFICER; ELECTED MANAGER/ CHIEF FINANCIAL OFFICER (+1 more) | — |
| AVICOLLI JENNIFER ANN | CHIEF COMPLIANCE OFFICER; GENERAL COUNSEL & CHIEF COMPLIANCE OFFICER | — |
| ORRICO JOHN SABBOTT | LIMITED PARTNER; MANAGING MEMBER; MANAGING MEMBER AND MANAGEMENT COMMITTEE MEMBER (+3 more) | — |
| CHANNEN PHILIP EDWARD | CHIEF COMPLIANCE OFFICER | — |
| WAJS LAURA KIMBERLY | CHIEF COMPLIANCE OFFICER | — |
| FOLTYNOWICZ ROGER PHILLIP | MANAGEMENT COMMITTEE MEMBER; MINORITY OWNER | — |
| MUNN TODD WISTAR | MINORITY OWNER | — |
| KEENA WILLIAM B | CHIEF ADMINISTRATIVE OFFICER & MANAGEMENT COMMITTEE MEMBER; CHIEF ADMINISTRATIVE OFFICER & MINORITY OWNER | — |
| SCHONBERG JONATHAN NEAL | MINORITY OWNER | — |
| CASADEI ERIC MICHAEL | MANAGEMENT COMMITTEE MEMBER; MINORITY OWNER | — |
| JACKSON CARISA LYNNE | MINORITY OWNER | — |
| CAMPBELL MARK ALLEN | MINORITY OWNER | — |
| OSOWIECKI MATTHEW JAMES | CO-CHIEF INVESTMENT OFFICER; MANAGEMENT COMMITEE MEMBER; MINORITY OWNER | — |
| CHWAZIK LUDMILA | CHIEF COMPLIANCE OFFICER | — |
| CHEW CHRISTINA | SENIOR MANAGING PARTNER AND MANAGEMENT COMMITTEE MEMBER; SENIOR MANAGING PARTNER & MANAGEMENT COMMITTEE MEMBER | — |
| BINDAL ADITYA | CHIEF RISK OFFICER | — |


## Disclosures (1)

| Initiated | Type | Allegations | Status | Amount |
| --- | --- | --- | --- | --- |
| 2013-10-18 | regulatory | ALLEGED VIOLATIONS RELATED TO SECTION 7(F), RULE 12B-1(H) AND 38A-1 OF THE INVESTMENT COMPANY ACT OF 1940. | Final | $50K |


## Branch offices (2)

| City | State | Employees | Phone |
| --- | --- | --- | --- |
| — | — | 1 | 212-584-2366 |
| — | — | 1 | 212-584-2366 |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/113358/brochure
- Similar advisers: https://search.stillhousedata.com/firm/113358/similar
- Related entities: https://search.stillhousedata.com/firm/113358/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/113358

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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.