# Gustavus & Louise Pfeiffer

Gustavus & Louise Pfeiffer is a Private Foundation based in Wilmington, United States.

## Overview

- **Organization type:** Private Foundation
- **Headquarters:** Wilmington, United States
- **Region:** North America

## About

The IRS Exempt Organizations Business Master File snapshot retrieved on 2026-10-14 identifies Gustavus & Louise Pfeiffer as a private grantmaking foundation exempt under Section 501(c)(3). Its Employer Identification Number is 13-6086299. Its reported mailing city is Wilmington, Delaware, United States. For the tax period ending December 2024, the retained IRS record reports total assets of USD 19,610,601. Reported income for that tax period is USD 1,679,117. The IRS ruling year recorded in this snapshot is 1952. Total assets are balance-sheet assets, not assets under management. These are dated IRS records; they do not establish current finances or a present investment mandate.

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Updated: 2026-10-23T09:41:15Z

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