# CASTLEARK MANAGEMENT LLC

CASTLEARK MANAGEMENT LLC of CHICAGO, IL is an SEC-registered investment adviser.

## Registration

- CRD: 109587
- Type: SEC-registered investment adviser
- SEC file number: 801-56239
- Location: 1 N. WACKER DRIVE, SUITE 3950, CHICAGO, IL, 60606
- Phone: 312-456-9682
- Latest filing: 2026-04-01
- Regulatory AUM: $4.6B
- Discretionary AUM: $4.6B
- Clients: 28
- Accounts: 66

## Business model

- Compensation: % of AUM
- Clients served: High net worth, Pooled vehicles, Investment cos

## Officers, owners & control persons (24)

| Name | Role | Location |
| --- | --- | --- |
| Jerome A Castellini | CHIEF EXECUTIVE, CO-CHIEF INVESTMENT OFFICER; MANAGING MEMBER; MANAGING MEMBER, PREFERRED AND COMMON | Chicago, IL |
| Ajoy Reddi | MEMBER; MEMBER, PREFERRED AND COMMON; PORTFOIO MANAGER | — |
| James H Castellini | CHIEF LEGAL OFFICER | Seattle, WA |
| James Arthur Stark | CO-PORTFOLIO MANAGER; MEMBER; MEMBER, COMMON UNITS | — |
| Gregory Peter Baxter | MEMBER; MEMBER, COMMON UNIT; MEMBER, COMMON UNITS (+1 more) | — |
| Joseph M Hagan | CO-PORTFOLIO MANAGER; MEMBER; MEMBER, PREFERRED AND COMMON | — |
| Quentin Michael Ostrowski | CO-PORTFOLIO MANAGER; MEMBER; MEMBER, COMMON UNITS | — |
| Daniel P Becker | CO-CHIEF INVESTMENT OFFICER; MEMBER | — |
| Sarah Williams Johnson | CHIEF COMPLIANCE OFFICER | — |
| BRANCAZIO CHRISTOPHER JOHN | CHIEF COMPLIANCE OFFICER | — |
| CASTELLINI JEROME A | MANAGING MEMBER, PREFERRED AND COMMON; PRESIDENT | — |
| CLARK EDWARD | VICE PRESIDENT & SECRETARY | — |
| CASTELLINI JAMES H | CHIEF COMPLIANCE OFFICER; CHIEF LEGAL OFFICER; GENERAL COUNSEL | — |
| BAXTER PETER | MEMBER, COMMON UNITS | — |
| LUPIEN WILLIAM ALBERT | OWNER | — |
| BECKER TED P | CO-CHIEF INVESTMENT OFFICER; EXECUTIVE OFFICER | — |
| TAKAZAWA ROBERT SATORU | MEMBER, PREFERRED AND COMMON; SENIOR VICE PRESIDENT; SENIOR VP | — |
| SIMEK RICHARD J | CHIEF COMPLIANCE OFFICER | — |
| STARK JAMES ARTHUR | MEMBER, COMMON; MEMBER, COMMON UNITS; SENIOR VICE PRESIDENT | — |
| DOLSEN KEVIN M | CHEIF EXECUTIVE OFFICER; MEMBER, PREFERRED AND COMMON | — |
| ROCKEY JOAN KATHRYN | CHEIF FINANCIAL OFFICER; MEMBER, PREFERRED AND COMMON | — |
| REDDI AJOY | MEMBER, PREFERRED AND COMMON | — |
| Hagan Joseph M | MEMBER, PREFERRED AND COMMON | — |
| OSTROWSKI QUENTIN MICHAEL | MEMBER, COMMON UNITS | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/109587/brochure
- Similar advisers: https://search.stillhousedata.com/firm/109587/similar
- Related entities: https://search.stillhousedata.com/firm/109587/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/109587

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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.