CIK 1222765
Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.
Firm-level facts as reported by the adviser on Form ADV Part 1A (latest filing 2026-03-30). Regulatory assets under management (RAUM) is Form ADV's gross figure and can differ from a 13F long book — it includes private-fund assets, leverage and non-13(f) securities. Titles and figures as-filed. Latest ADV filing 2026-03-30. Form ADV ↗
| Name | Title (as filed) | Since | Ownership |
|---|---|---|---|
| BUNTIC, CAROLYN, MARIE | MANAGEMENT COMMITTEE MEMBER | 2025-04 | <5% ·◆ |
| CASADEI, ERIC, MICHAEL | MANAGEMENT COMMITTEE MEMBER | 2020-01 | <5% ·◆ |
| DUNLEAVY, JUSTIN, MICHAEL | MANAGEMENT COMMITTEE MEMBER | 2017-01 | <5% ·◆ |
| HICKEY, JONATHON, THOMAS | SENIOR MANAGING PARTNER, CHIEF OPERATING OFFICER, AND MANAGEMENT COMMITTEE MEMBER | 2014-11 | <5% ·◆ |
| ORRICO, JOHN, SABBOTT | MANAGING MEMBER, CO-CHIEF INVESTMENT OFFICER, AND MANAGEMENT COMMITTEE MEMBER | 2000-01 | <5% ·◆ |
| OSOWIECKI, MATTHEW, JAMES | CO-CHIEF INVESTMENT OFFICER AND MANAGEMENT COMMITTEE MEMBER | 2024-03 | <5% ·◆ |
| PLUNKETT, CHRISTOPHER, JOHN | MANAGEMENT COMMITTEE MEMBER | 2022-01 | <5% ·◆ |
| CHANNEN, PHILIP, EDWARD | CHIEF COMPLIANCE OFFICER | 2019-11 | <5% |
| WATER ISLAND CAPITAL PARTNERS LPentity | MANAGING MEMBER | 2018-02 | 75%+ ·◆ |
Direct owners and executive officers as filed on the adviser's Form ADV Schedule A (as-filed titles; ADV updates annually and on material change). This lists officers and 5%+ owners — not necessarily the full portfolio-management team.
Signed this manager's latest 13F (2026-Q1). The filing's authorized signatory — frequently a compliance officer, general counsel, or CFO — not necessarily the portfolio manager or firm leadership.
| Name | Role (as filed) | Departed after | Now at (if tracked) |
|---|---|---|---|
| CHEW, CHRISTINA | SENIOR MANAGING PARTNER AND MANAGEMENT COMMITTEE MEMBER · SENIOR MANAGING PARTNER & MANAGEMENT COMMITTEE MEMBER | 2024-03 | — not seen at a tracked firm |
| FOLTYNOWICZ, ROGER, PHILLIP | MANAGEMENT COMMITTEE MEMBER · MINORITY OWNER | 2023-03 | — not seen at a tracked firm |
| Watkins, Curtis, Barger | MANAGEMENT COMMITTEE MEMBER | 2020-03 | — not seen at a tracked firm |
| CHWAZIK, LUDMILA | CHIEF COMPLIANCE OFFICER | 2019-03 | — not seen at a tracked firm |
| MUNN, TODD, WISTAR | MINORITY OWNER | 2018-03 | — not seen at a tracked firm |
| CAMPBELL, MARK, ALLEN | MINORITY OWNER | 2018-03 | — not seen at a tracked firm |
| BINDAL, ADITYA | CHIEF RISK OFFICER | 2018-03 | — not seen at a tracked firm |
| SCHONBERG, JONATHAN, NEAL | MINORITY OWNER | 2017-03 | — not seen at a tracked firm |
| KEENA, WILLIAM, B. | CHIEF ADMINISTRATIVE OFFICER & MANAGEMENT COMMITTEE MEMBER · CHIEF ADMINISTRATIVE OFFICER & MINORITY OWNER | 2016-11 | — not seen at a tracked firm |
| WAJS, LAURA, KIMBERLY | CHIEF COMPLIANCE OFFICER | 2016-08 | — not seen at a tracked firm |
| AVICOLLI, JENNIFER, ANN | GENERAL COUNSEL & CHIEF COMPLIANCE OFFICER · CHIEF COMPLIANCE OFFICER | 2016-03 | — not seen at a tracked firm |
| HEMBERGER, MATTHEW | ELECTED MANAGER/CHIEF FINANCIAL OFFICER · ELECTED MANAGER/ CHIEF FINANCIAL OFFICER | 2013-12 | — not seen at a tracked firm |
| JACKSON, CARISA, LYNNE | MINORITY OWNER | 2012-03 | — not seen at a tracked firm |
Named owners/officers on a past Form ADV Schedule A who are gone from the firm's latest filing. “Departed after” is the last dated filing they appear on. A landing shows only when the destination is another SEC-registered adviser we track.
