IRS organization
THE HENRI AND FLORE LESIEUR FOUNDATION
This listing describes a nonprofit organization. Tax classification is separate from state registration and operating status.
Record reference date: October 13, 2026. Details may be incomplete or outdated.
- Record type
- IRS organization
- Record identifier
- 510378395
- Status
- Unconditional Exemption
- City
- Chicago
- State or territory
- Illinois
- Address
- 10 S DEARBORN IL1-0111
- Postal code
- 60603-2300
- Record date
- Not reported
- EIN
- 510378395
- IRS subsection code
- 03
- IRS ruling month (YYYYMM)
- 199703
- NTEE classification
- T20Z
Names and reported roles
Roles are shown as reported. Agents, officers and principals are not automatically owners.
Business names
- IRS organization name
- THE HENRI AND FLORE LESIEUR FOUNDATION
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Directory details
Identifiers
- Ein
- 51-0378395
Names
- Legal
- THE HENRI AND FLORE LESIEUR FOUNDATION
Addresses
- Mailing · Street 1
- 10 S DEARBORN IL1-0111
- Mailing · City
- Chicago
- Mailing · Region
- IL
- Mailing · Postal Code
- 60603-2300
Tax
- Group Exemption Number
- 0000
- Subsection
- 501(c)(3)
- Affiliation
- Independent organization
- Classification Codes
- 1000
- Deductibility
- Contributions deductible
- Foundation Classification
- Private nonoperating foundation
- Activity Codes
- 602000000
- Irs Status
- Unconditional Exemption
- Return Filing Requirement
- No Form 990 filing required: other
- Private Foundation Filing Requirement
- Form 990-PF required
- Accounting Period Month
- 3
Dates
- Irs Ruling Month
- 1997-03
- Tax Period
- 2026-03
Entity
- Irs Organization Form
- Trust
Financial
- Asset Band
- $5,000,000–$9,999,999
- Income Band
- $1,000,000–$4,999,999
- Assets Usd
- 9603591
- Income Usd
- 2016743
Industry
- Ntee Code
- T20Z
All reported fields
Other reported details
- EIN
- 510378395
- STATUS
- 01
Names and reported roles
- IRS organization name
- THE HENRI AND FLORE LESIEUR FOUNDATION
Mailing information
- IRS mailing street
- 10 S DEARBORN IL1-0111
- IRS mailing city
- CHICAGO
- IRS mailing state
- IL
- IRS mailing postal code
- 60603-2300
IRS reported fields and codes
- GROUP
- 0000
- SUBSECTION
- 03
- AFFILIATION
- 3
- CLASSIFICATION
- 1000
- IRS ruling month (YYYYMM)
- 199703
- DEDUCTIBILITY
- 1
- FOUNDATION
- 04
- ORGANIZATION
- 2
- IRS tax period (YYYYMM)
- 202603
- ASSET CD
- 7
- INCOME CD
- 6
- FILING REQ CD
- 00
- PF FILING REQ CD
- 1
- ACCT PD
- 03
- Reported assets (USD)
- 9603591
- Reported income (USD)
- 2016743
Industry and classification
- ACTIVITY
- 602000000
- NTEE classification
- T20Z