# HALLIDAY WILLIAM P

HALLIDAY WILLIAM P appears across SEC filings — Form ADV advisers, Form D, Reg A, and crowdfunding offerings. 3 filing roles across Form ADV (3).

## Filings (3)

| Filed | Source | Entity | Role | Location |
| --- | --- | --- | --- | --- |
| — | Form ADV | [SOUTHERNSUN ASSET MANAGEMENT LLC](https://search.stillhousedata.com/firm/154572) | CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER/PRINCIPAL/MGMT COMM MBR | MEMPHIS, TN |
| — | Form ADV | [SOUTHERNSUN ASSET MANAGEMENT, INC](https://search.stillhousedata.com/firm/108741) | CHIEF OPERATING OFFICER / CHIEF COMPLIANCE OFFICER | MEMPHIS, TN |
| — | Form ADV | [NEW RIVER ADVISERS LLC](https://search.stillhousedata.com/firm/127490) | CHIEF EXECUTIVE OFFICER / CHIEF COMPLIANCE OFFICER | MEMPHIS, TN |


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Source: public SEC filing 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.