# WILLIAM O'NEIL + CO. INCORPORATED

WILLIAM O'NEIL + CO. INCORPORATED of LOS ANGELES, CA is an SEC-registered investment adviser.

## Registration

- CRD: 152620
- Type: SEC-registered investment adviser
- SEC file number: 801-120403
- Location: 12655 BEATRICE STREET, SUITE 2A, LOS ANGELES, CA, 90066
- Phone: 310-448-6800
- Latest filing: 2026-03-20
- Clients: 39

## Business model

- Compensation: Fixed, Subscription
- Clients served: Corporations, Other

## Officers, owners & control persons (10)

| Name | Role | Location |
| --- | --- | --- |
| Alexander Victor Masotti | GENERAL COUNSEL & CHIEF COMPLIANCE OFFICER | — |
| Jose Castulo Olivas | CHIEF FINANCIAL OFFICER | — |
| Gregory Samuel Jannetta | CHIEF EXECUTIVE OFFICER | — |
| ONEIL JAMES JOSEPH | SHAREHOLDER | — |
| MASOTTI ALEXANDER VICTOR | CHIEF COMPLIANCE OFFICER; GENERAL COUNSEL; GENERAL COUNSEL & CHIEF COMPLIANCE OFFICER | — |
| BIRCH STEVEN LAWRENCE | CHIEF EXECUTIVE OFFICER | — |
| O'NEIL WILLIAM SCOTT | TRUSTEE | — |
| Kumamoto Eugene Masakazu | CHIEF FINANCIAL OFFICER | — |
| JANNETTA GREGORY SAMUEL | CHIEF EXECUTIVE OFFICER; CHIEF OPERATING OFFICER | — |
| LEE PAN-YUN BEN | CHIEF FINANCIAL OFFICER | — |


## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/152620/brochure
- Similar advisers: https://search.stillhousedata.com/firm/152620/similar
- Related entities: https://search.stillhousedata.com/firm/152620/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/152620

---

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.