Charity Search / CARLOS AND MARGUERITE MASON FOUNDATION
Philanthropy & Grantmaking (T20) 990 on File

CARLOS AND MARGUERITE MASON FOUNDATION

EIN: 58-1996431 · SAINT LOUIS, MO 63166-0505 · United States · FY 2024 Data
3 out of 5 50 / 100 Based on 2+ years of filings
Financial strength (30%) 89/100
Reliability (20%) 55/100
Effectiveness (25%) 51/100
Impact (25%) No data yet
Financial data: FY 2024 · Scored 9/13/2026
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CharityAI™ Score
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Financial Overview — FY 2024
$13.5M
Total Revenue
$6.3M
Total Expenses
$102.8M
Net Assets
N/A
Employees
Revenue Sources
Expense Breakdown
Program Expense Ratio 87.6%
Fundraising Efficiency N/A
Operating Reserve 195.17x
Liability-to-Asset 0.0%
Revenue Diversification 94.3%
Executive Compensation $500K
Compared with Peers
FY 2024
Compared with 5,337 similar organizations (United States, Philanthropy & Grantmaking, $1M–$10M in expenses), FY 2024.
This organization Middle half of peers (P25–P75) Peer median
Ratio This org Peer median Position (P10 → P90)
Program expense ratio
Program expenses / total expenses · higher is better
87.6% 90.9%
P10P90
Below median
Operating reserve
Months of expenses covered by net assets · higher is better
195.2 mo 80.9 mo
P10P90
Top quarter
Liabilities to assets
Total liabilities / total assets · lower is better
0.0% 0.0%
P10P90
Top quarter
Revenue concentration
Share of revenue from the largest source · lower is better
94.3% 89.7%
P10P90
Below median
Revenue growth
Year over year revenue growth
169.3% 21.6%
P10P90
Expense growth
Year over year expense growth
14.7% 9.6%
P10P90
Surplus margin
Surplus as a share of revenue
53.3% 2.5%
P10P90
Financial History
Year Revenue Expenses Net Assets Program % Staff
2024 $13.5M $6.3M $102.8M 87.6% —
2023 $5.0M $5.5M $95.6M 90.6% —
2022 $3.3M $6.6M $97.5M 91.8% —
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Organization Details
EIN
58-1996431
State
MO
City
SAINT LOUIS
ZIP
63166-0505
Classification
T20
Category
Philanthropy & Grantmaking
Rating
3★
Coverage
A
Last Updated
Aug 2026
Form 990
On File
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