# John Marshall Williams

John Marshall Williams of Cincinnati, OH appears across SEC filings — Form ADV advisers, Form D, Reg A, and crowdfunding offerings. 3 filing roles across Form D (2), Form ADV (1).

## Filings (3)

| Filed | Source | Entity | Role | Location |
| --- | --- | --- | --- | --- |
| 2025-08-01 | Form ADV | [QUADRANT CAPITAL GROUP LLC](https://search.stillhousedata.com/firm/147253) | MANAGING PARTNER & CO-FOUNDER | CINCINNATI, OH |
| 2018-07-13 | Form D | [Blue Water Quadrant LLC](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1692434&type=&dateb=&owner=include&count=40) | Director | CINCINNATI, OH |
| 2021-05-19 | Form D | [Tulco Quadrant LLC](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1763974&type=&dateb=&owner=include&count=40) | Executive Officer | CINCINNATI, OH |


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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.