The Ronald and Maxine Linde Foundation
The Ronald and Maxine Linde Foundation is a private foundation, based in Paradise Valley, AZ. IRS filing data is available from 2021 through 2025. As of 2025, the organization holds $36.5M in total assets. In 2025, it awarded 5 grants totaling $1.6M. Net investment income was $2.2M.
The Ronald and Maxine Linde Foundation at a glance
In short: The Ronald and Maxine Linde Foundation gave $1.6M across 5 grants in 2025 (avg $315K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $1,575,000
- +44.5% vs 2024
- Grants made (2025)
- 5
- +25.0% vs 2024
- Average grant
- $315,000
- +15.6% vs 2024
- Median grant
- $20,000
- Total assets
- $36,548,537
- +5.6% vs 2024
- Primary geography
- California (99% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who The Ronald and Maxine Linde Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2025
The largest 2025 recipient was California Institute of Technology (Tax Id # 95-1643307) ($1.6M across 4 grants). Together the top 2 received $1.6M.
Grant Size Distribution
15 grants across all recorded years
The most common grant size was under $50K: 10 grants of 15 (67%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 5 itemized grants.
States
Cities
How The Ronald and Maxine Linde Foundation gives
- Giving grew 31% from 2022 to 2025. Method
- In 2025 it paid out 90% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2021 to 2025, annual grant giving ranged from $1.1M (2024) to $1.8M (2023). In 2025 it made 5 grants totaling $1.6M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| California Institute of Technology (Tax Id # 95-1643307) Pasadena, CA | Center for SCIENCE,SOCIETY, and Policy (LCSSP) Endowment | $1,515,000 |
| California Institute of Technology (Tax Id # 95-1643307) Pasadena, CA | Scholarship Endowment (LSE) Fund | $25,000 |
| California Institute of Technology (Tax Id # 95-1643307) Pasadena, CA | Unrestricted | $20,000 |
| American Academy of Arts & Sciences (Tax Id# 04-2103651) Cambridge, MA | Unrestricted | $10,000 |
| California Institute of Technology (Tax Id # 95-1643307) Pasadena, CA | Disaster Relief Fund | $5,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $36,548,537 | $4,418,238 | $2,331,709 | $1,575,000 | 5 | $1,576,284 | $2,155,877 | $1,744,294 |
| 2024 | $34,614,596 | $4,879,036 | $1,779,066 | $1,090,000 | 4 | $1,094,625 | $3,096,421 | $1,575,228 |
| 2023 | $32,218,912 | $2,864,372 | $2,125,731 | $1,830,000 | 2 | $1,835,312 | $1,046,470 | $1,587,361 |
| 2022 | $30,656,458 | $3,198,032 | $1,448,718 | $1,200,000 | 1 | $1,204,812 | $2,936,951 | $1,358,772 |
| 2021 | $24,517,191 | $894,625 | $1,744,431 | $1,225,000 | 3 | — | $378,605 | $1,184,971 |
Under IRS private-foundation payout rules, The Ronald and Maxine Linde Foundation reported a distributable amount of $1.7M for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Ronald and Maxine Linde Foundation is led by Maxine H. Linde, President & Director on every filing since 2021; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Maxine H. Linde
President & Director
On filings since 2021
0.5 hrs/week
No compensation reported
Ronald K. Linde
Chair, Treasurer, Secretary & Director
On filings since 2021
1.5 hrs/week
No compensation reported
Jennings J. Newcom
Director
On filings since 2021
0.1 hrs/week
No compensation reported
Lester G. Traub
Director
On filings since 2021
0.1 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2021–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about The Ronald and Maxine Linde Foundation
How much does The Ronald and Maxine Linde Foundation give each year?
The Ronald and Maxine Linde Foundation gave $1.6M across 5 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $1.1M across 4 grants.
What is The Ronald and Maxine Linde Foundation's typical grant size?
The Ronald and Maxine Linde Foundation's median grant in 2025 was $20,000, and its average grant was $315,000, across 5 grants on its 2025 IRS Form 990-PF.
Where does The Ronald and Maxine Linde Foundation give grants?
The Ronald and Maxine Linde Foundation gives mostly in California: 99% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Pasadena, CA (4 grants).
Does The Ronald and Maxine Linde Foundation give general operating support?
Yes: 40% of The Ronald and Maxine Linde Foundation's 2025 grants with a stated purpose (2 of 5) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is The Ronald and Maxine Linde Foundation?
The Ronald and Maxine Linde Foundation reported $36.5M in total assets on its 2025 IRS Form 990-PF. It paid out $1.6M in qualifying distributions that year, against a required minimum of $1.7M (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What is The Ronald and Maxine Linde Foundation's EIN?
The Ronald and Maxine Linde Foundation's EIN (Employer Identification Number) is 36-3635349. IRS Form 990 filing data is available on this page for 2021–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2021–2025
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