Arts, Culture & Humanities (A50Z) 990 on File

ALTADENA HISTORICAL SOCIETY

EIN: 23-7372694 · ALTADENA, CA 91001-2351 · United States · FY 2025 Data

3 out of 5 59 / 100 Based on one year of filings

Financial strength (30%) 94/100

Reliability (20%) 55/100

Effectiveness (25%) 78/100

Impact (25%) No data yet

Financial data: FY 2025 · Scored 10/18/2026

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CharityAI™ Score

Not yet evaluated

Financial Overview — FY 2025

$438K

Total Revenue

$36K

Total Expenses

$447K

Net Assets

Employees

Revenue Sources

Expense Breakdown

Program Expense Ratio 77.2%

Fundraising Efficiency N/A

Operating Reserve 148.30x

Liability-to-Asset 0.8%

Revenue Diversification 95.5%

Executive Compensation $0

Compared with Peers

FY 2025

Compared with 8,067 similar organizations (United States, Arts, Culture & Humanities, under $100K in expenses), FY 2025.

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	77.2%	82.0%	P10P90	Below median
Admin expense ratio Management and general / total expenses · lower is better	13.2%	10.3%	P10P90	Below median
Fundraising expense ratio Fundraising expenses / total expenses · lower is better	9.6%	0.0%	P10P90	Bottom quarter
Operating reserve Months of expenses covered by net assets · higher is better	148.3 mo	16.0 mo	P10P90	Top quarter
Liabilities to assets Total liabilities / total assets · lower is better	0.8%	0.0%	P10P90	Bottom quarter
Revenue concentration Share of revenue from the largest source · lower is better	95.5%	86.5%	P10P90	Below median
Surplus margin Surplus as a share of revenue	91.7%	9.1%	P10P90

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Organization Details

EIN: 23-7372694
State: CA
City: ALTADENA
ZIP: 91001-2351
Classification: A50Z
Category: Arts, Culture & Humanities
Rating: 3★
Coverage: B
Last Updated: Aug 2026
Form 990: On File

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CharityAI™ rates charities from 0 to 100 using public filings (IRS Form 990 and the equivalent registries outside the US) together with the information the charity itself provides on DonationX. Ratings are recalculated every quarter, without human bias, and shown as stars.

Four pillars

Financial strength30%

Program expense ratio, fundraising efficiency, operating reserves, liabilities and revenue diversification, compared with similar organizations.

Reliability20%

Standing with the registry, filing history, verification and how complete the profile is.

Effectiveness25%

How much goes to programs and how consistently the organization delivers them.

Impact25%

The outcomes the charity reports on DonationX: people served, cost per service and results.

Stars

★★★★★ 80–100 ★★★★☆ 60–79 ★★★☆☆ 40–59 ★★☆☆☆ 20–39 ★☆☆☆☆ 1–19

A pillar with no data counts as zero. Without impact metrics the score is capped at 59 (three stars): only the charity can supply that data.
The coverage grade (A to D) says how much filing data the score rests on; NONE means there is not enough to rate.
An organization that is not in good standing with its registry (for example a revoked tax exemption) is shown as Not rated.
"Compared with peers" places the charity's key ratios against organizations of the same country, sector and size.

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