Foundation directory

Foundations starting with S

964 private foundations with profiled giving history. Figures from IRS 990-PF filings.

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Typical grant is the median of grants reported in the filing data.

1–24 of 964 foundations in this list

The Susan Thompson Buffett Foundation

Latest IRS filing: 2025 · Current application dates need confirmation.

Most reported giving: KIGALI, DC, NY

Typical grant
$503.1K
Total giving
$2.4B
Grants reported
815
The Sherwood Foundation

Latest IRS filing: 2025 · Current application dates need confirmation.

Most reported giving: NE, IA, DC

Typical grant
$80K
Total giving
$552.5M
Grants reported
1,620
Sequoia Climate Foundation

Latest IRS filing: 2023 · Current application dates need confirmation.

Most reported giving: NY, DC, CA

Typical grant
$1M
Total giving
$305.4M
Grants reported
187
The Sunderland Foundation

Latest IRS filing: 2025 · Current application dates need confirmation.

Most reported giving: MO, KS, NY

Typical grant
$495K
Total giving
$279.1M
Grants reported
121
The Simons Foundation Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: NY, CA, MA

Typical grant
$72K
Total giving
$272M
Grants reported
1,727
The Schmidt Family Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CA, NY, DC

Typical grant
$130K
Total giving
$185.4M
Grants reported
695
The Snider Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: PA, CA, DC

Typical grant
$25K
Total giving
$174.5M
Grants reported
249
Steven & Alexandra Cohen Foundation Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CT, NY, CA

Typical grant
$100K
Total giving
$130M
Grants reported
191
Shelby Cullom Davis Charitable Fund Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: NM, NY, CA

Typical grant
$200K
Total giving
$120.2M
Grants reported
118
Surdna Foundation Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: NY, CA, DC

Typical grant
$78K
Total giving
$115.4M
Grants reported
789
The Sarofim Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: TX, NJ, NY

Typical grant
$150K
Total giving
$114.9M
Grants reported
152
Susquehanna Foundation

Latest IRS filing: 2025 · Current application dates need confirmation.

Most reported giving: MA, RI, DC

Typical grant
$72.5K
Total giving
$90.4M
Grants reported
46
The Shubert Foundation Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: NY, CA, IL

Typical grant
$35K
Total giving
$82.1M
Grants reported
1,323
Samueli Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CA, NY, VA

Typical grant
$39.5K
Total giving
$80.6M
Grants reported
366
Skyline Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CA, NY, DC

Typical grant
$250K
Total giving
$80.4M
Grants reported
194
Stephen A Schwarzman Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: MA, NY, OH

Typical grant
$1.2M
Total giving
$76.1M
Grants reported
18
Stanley M Herzog Charitable Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: MO, VA, KY

Typical grant
$5K
Total giving
$74.4M
Grants reported
154
The Starr Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: NY, DC, CT

Typical grant
$27.5K
Total giving
$73.5M
Grants reported
90
The Sobrato Family Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CA, MD, DC

Typical grant
$75K
Total giving
$69.3M
Grants reported
526
The Skip Viragh Foundation Inc

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: CA, MD, MO

Typical grant
$242.5K
Total giving
$66M
Grants reported
98
Stanley Family Foundation

Latest IRS filing: 2024 · Current application dates need confirmation.

Most reported giving: MA, VA, PA

Typical grant
$10K
Total giving
$60.8M
Grants reported
19

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