Foundations · IRS 990 filings

Foundations in Portsmouth, New Hampshire

34
foundations with a Portsmouth address
$11.3M
grants paid, FY2024–FY2025
4
say they accept unsolicited
$9,969
median grant

Grantlas lists 34 foundations that gave a Portsmouth, New Hampshire address on their tax filing — 32 private foundations and 2 grantmaking charities such as community foundations and United Ways — from filings for FY2024–FY2025. Together they paid out $11.3 million in grants in their latest filing year, and 4 of them (12%) say they accept unsolicited requests.

Not every foundation here is a Portsmouth foundation. The city is the mailing address on the foundation’s tax filing, and when a bank or a law firm runs the trust that is the bank’s address, not the place it gives to. Check where a foundation gives before you write.

Top 25 of 34 foundations

Ranked by what they paid in grants in their latest filing, with the ones that accept unsolicited requests first, then the ones whose filing doesn’t say.

Foundations in Portsmouth, New Hampshire
Service Credit Union Impact FoundationAccepts$5,000$909,699$2,500–$894,158FY2025Locked: fit score and contacts
Foundation for Seacoast HealthAccepts$20,000$908,420$150–$50,000FY2025Locked: fit score and contacts
Dorr FoundationAccepts$485,607$513,312$457,902–$513,312FY2025Locked: fit score and contacts
The Sicot FoundationAccepts$500$8,560$60–$1,200FY2025Locked: fit score and contacts
The Charitable Division of the Rotary Club of PortsmouthPublic foundationNot stated$9,938Over $5k only$235,733$5,274–$37,054FY2025Locked: fit score and contacts
OPL CharitiesGrantmaking charityNot stated$25,100Over $5k only$103,200$10,000–$43,000FY2024Locked: fit score and contacts
Peter and Anna Kolchinsky FoundationInvitation only$75,000$3M$15,000–$1MFY2024Locked: fit score and contacts
Jaffe FoundationInvitation only$57,049$1.2M$48,020–$750,623FY2024Locked: fit score and contacts
Ten Fingers FoundationInvitation only$10,000$1.1M$400–$915,000FY2024Locked: fit score and contacts
Louis P Singer Fund IncInvitation only$10,000$480,000$500–$134,500FY2025Locked: fit score and contacts
Stephen M Ross FoundationInvitation only$25,000$396,414$14,811–$250,000FY2024Locked: fit score and contacts
The Dennis A O'Toole Family FoundationInvitation only$6,250$352,000$1,000–$48,000FY2025Locked: fit score and contacts
Weatherlow FoundationInvitation only$3,000$327,000$1,000–$36,000FY2025Locked: fit score and contacts
Chase Home for ChildrenInvitation only$240,362$271,458$209,266–$271,458FY2024Locked: fit score and contacts
The Holtzman Family FoundationInvitation only$10,000$221,800$200–$35,000FY2025Locked: fit score and contacts
The Campbell's Family Foundation IncInvitation only$5,000$210,000$1,000–$30,000FY2025Locked: fit score and contacts
AllattWalsh FoundationInvitation only$25,000$200,000$5,000–$50,000FY2025Locked: fit score and contacts
Windhover FoundationInvitation only$3,000$175,000$500–$30,000FY2025Locked: fit score and contacts
Third Street FoundationInvitation only$3,000$124,000$1,000–$66,000FY2025Locked: fit score and contacts
B Longworth TrustInvitation only$116,529$108,927$108,927–$124,131FY2025Locked: fit score and contacts
R & T Thompson EndowmentInvitation only$18,000$95,000$12,000–$25,000FY2025Locked: fit score and contacts
The Webs FoundationInvitation only$5,000$48,500$500–$28,950FY2025Locked: fit score and contacts
The MORF Foundation IncInvitation only$4,250$45,761$500–$15,000FY2025Locked: fit score and contacts
Equilibrium Project FoundationInvitation only$5,000$35,000$5,000–$10,000FY2025Locked: fit score and contacts
The Emerson and Ruth McCourtInvitation only$32,750$32,750$28,625–$33,625FY2025Locked: fit score and contacts
  • Median grant and grant range come from each funder’s grant schedule; a dash means there is none to report. Community foundations and other charities list only grants over $5,000, so their figures run high.
  • “One grant” means a schedule with a single grant — no median, nothing to range over. “One amount” means several grants, all the same size.
  • A median grant larger than the grants paid is not a mistake: the grant schedule and the year’s total come from different parts of the tax filing, and a foundation can list a grant it approved in a year it paid out less.

9 more foundations — see all in Grantlas

Data from 990-PF and Form 990 filings, FY2024–FY2025. Updated November 8, 2026.