# JOHN P CALAMOS SR FOUNDATION

JOHN P CALAMOS SR FOUNDATION is a Private Foundation based in NAPERVILLE, United States.

## Overview

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

## About

JOHN P CALAMOS SR FOUNDATION is listed by the Internal Revenue Service as a private grantmaking foundation exempt under Section 501(c)(3), with employer identification number 20-1383344. The IRS filing address is in NAPERVILLE, IL, United States. For the tax period ending December 2025, the IRS Exempt Organizations Business Master File lists year-end book assets of USD 56,507,546 and an IRS-computed Income Amount of USD 8,211,123. For private foundations, this extract field combines total revenue with specified cost-of-goods and cost-basis amounts from Form 990-PF. The IRS ruling date on file is June 2006. These tax-filing amounts are not assets under management or net profit.

## Questions

### What is JOHN P CALAMOS SR FOUNDATION?

The IRS lists JOHN P CALAMOS SR FOUNDATION as a private grantmaking foundation exempt under Section 501(c)(3), with EIN 20-1383344.

### What filing locality does the IRS record for JOHN P CALAMOS SR FOUNDATION?

The IRS filing address is in NAPERVILLE, IL, United States.

### What book assets does the IRS report for JOHN P CALAMOS SR FOUNDATION?

For the tax period ending December 2025, the IRS lists year-end book assets of USD 56,507,546.

### What does the IRS Income Amount for JOHN P CALAMOS SR FOUNDATION represent?

For the tax period ending December 2025, the IRS-computed Income Amount is USD 8,211,123. For private foundations, this extract field combines total revenue with specified cost-of-goods and cost-basis amounts from Form 990-PF.

---

Updated: 2026-10-15T14:30:23.520Z

Canonical page: https://altss.com/profile/john-p-calamos-sr-foundation

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology