The Onion Foundation concentrates its giving on land conservation capacity, providing significant, targeted support to organizations that strengthen land trusts. Its grants are directed toward technical and financial assistance rather than direct program delivery, suggesting a preference for building the infrastructure and effectiveness of conservation nonprofits—likely with a regional focus around Maine/New England.
Onion Foundation’s largest recent grant was $625,000 to Momentum Conservation in Portland for technical and financial support to land trusts, and that same intermediary support appears again at $470,000 the year before. That pattern points to a funder focused less on direct project delivery than on strengthening the organizations that hold conservation work together. The foundation also backs work at the intersection of environment, arts, and public access, including funding for Maine organizations that expand nature learning, support outdoor equity, and sustain arts engagement. Recent grants show a mix of large infrastructure-oriented awards and smaller operating or program grants, with recipients ranging from conservation collaboratives and land trusts to arts groups, education organizations, and Wabanaki-serving programs. The foundation’s giving is heavily tied to Maine, and its recent portfolio suggests a consistent interest in building capacity: helping land trusts, arts nonprofits, and environmental education groups add staff skills, fundraising strength, and program reach. That combination of conservation infrastructure and community access is the clearest throughline in the grant record.
A major theme is land conservation capacity. Onion Foundation gave $40,000 to Southern Maine Conservation Collaborative for a land trust intermediary role, and $30,000 to Brunswick-Topsham Land Trust Inc. to support nature-based education programs. It also funded Maine Lakes with $41,000 for general support, showing attention to the organizations that steward conservation work over time. In environmental education, the foundation awarded $52,500 to Maine Audubon to expand science-based environmental education to Lewiston and Bangor schools, and $46,000 to the Maine Environmental Education Association for outdoor learning mini-grants to Maine public schools. Arts funding is another distinct strand: $88,000 went to Maine Association of Nonprofits for the Cultural Alliance of Maine’s arts and culture advocacy, while $42,500 supported SPACE Gallery’s weekend-long gathering for the Maine dance community. A fourth area is outdoor access, including $50,000 to Maine Initiatives for the Maine Outdoor Equity Fund.
Onion Foundation’s recent grants cluster around a median size of $11,750, with a lower quartile of $7,000 and an upper quartile of $15,000. The pattern is mixed: a few large awards support land-trust infrastructure, while many other grants sit in the low five-figure range. Recipients appear across multiple years, including Momentum Conservation, Maine Association of Nonprofits, Maine Environmental Education Association, Maine GearShare, and Maine Mathematics and Science Alliance, which indicates repeat support rather than one-off funding alone. The foundation is a regular funder and also makes program-related investments. It accepts unsolicited applications for several programs, especially in environment and arts areas, while one arts capacity-building track is by invitation only.
$4.4M
$63.6M
$3.1M
$5.6M
Most grants fall between $7K and $15K, with a median of $12K.
25th Percentile
$7K
Median
$12K
75th Percentile
$15K
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Highly concentrated giving: large grants directed to a single repeat grantee (Momentum Conservation). The foundation favors substantial, focused donations that bolster intermediary or capacity-building organizations rather than many small or diverse recipients.
Notable grantees: Momentum Conservation
Grantmaking is overwhelmingly local. Ninety-six percent of grants go to recipients in Maine, and every listed recipient country is the United States. The strongest city-level clusters are in Portland, Brunswick, and Augusta, with additional awards in Bangor, Lewiston, Rockland, Falmouth, and Yarmouth. A few grants also reach beyond Maine for Maine-focused work, including organizations in Fayston, Vermont; Boston, Massachusetts; Newmarket, New Hampshire; and Valley Cottage, New York.
Its grant record centers on conservation infrastructure, nature learning, outdoor access, and arts engagement in Maine. Recent awards include support for land trusts, environmental education, the Maine Outdoor Equity Fund, and arts advocacy and public engagement work.
Yes, for several active programs. The environment and arts programs listed as open to unsolicited proposals include Equitable Outdoor Access, Nature Learning, Arts Engagement, Arts Education & Arts Engagement, Arts Education & Arts Public Engagement, and Arts Education.
Typical recent grants are modest to mid-sized: the 25th percentile is $7,000, the median is $11,750, and the 75th percentile is $15,000. The recent record also includes larger awards for land-trust support and other capacity-building work.
Maine is the clear geographic focus. Ninety-six percent of grants go to recipients in the foundation’s headquarters state, and the recipient distribution in the data shows grants only in the United States.
Yes. Momentum Conservation, Maine Association of Nonprofits, Maine Environmental Education Association, Maine GearShare, and Maine Mathematics and Science Alliance all appear in multiple grant years, suggesting repeat relationships rather than one-time awards.
2025
Source: IRS Form 990-PF, fiscal year 2025.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| Momentum Conservation | Portland, ME | $625,000 | 2025 | To provide technical and financial support to land trusts |
| Maine Association of Nonprofits | Portland, ME | $88,000 | 2025 | To support the Cultural Alliance of Maine's arts and for culture advocacy |
| New Learning Journey | Fayston, VT | $75,000 | 2025 | To support the First Light program in increasing access to land and water for Wabanaki people |
| Maine Environmental Education Association | Brunswick, ME | $75,000 | 2025 | To conduct a landscape analysis of Maines Youth Climate Movement |
| Maine Mathematics and Science Alliance | Augusta, ME | $71,000 | 2025 | To support the professional development of educators |
| Mayo Street Arts | Portland, ME | $57,500 | 2025 | To provide general support |
| Maine Audubon | Falmouth, ME | $52,500 | 2025 | To expand science-based environmental education to Lewiston and Bangor schools |
| Maine Initiatives | Portland, ME | $50,000 | 2025 | To support the Maine Outdoor Equity Fund |
| SPACE Gallery | Portland, ME | $42,500 | 2025 | To support a weekend-long gathering for the Maine dance community |
| Maine Lakes | Yarmouth, ME | $41,000 | 2025 | To provide general support |
| President And Trustees Of Bates College | Lewiston, ME | $40,000 | 2025 | To support the Bates Dance Festival |
| Wabanaki Public Health and Wellness | Bangor, ME | $40,000 | 2025 | To support the ongoing development and sustainability of its fundraising team |
| Maine GearShare | Brunswick, ME | $40,000 | 2025 | To provide general support |
| OUT Maine | Rockland, ME | $35,000 | 2025 | To support an arts retreat at Haystack for Maine LGBTQ+ high school students |
| New England Grassroots Environment Fund Inc | Newmarket, NH | $30,000 | 2025 | To support grantmaking and convening in Maine |
| Climate Change for All Educators Inc | Valley Cottage, NY | $30,000 | 2025 | To establish the Maine Climate Education Hub |
| The Climate Initiative | Kennebunkport, ME | $30,000 | 2025 | To launch the Maine Collegiate Climate Policy Institute |
| Maine Coast Heritage Trust | Topsham, ME | $30,000 | 2025 | To support Maine Land Trust Network's Land Trust Census |
| Rippleffect | Portland, ME | $30,000 | 2025 | To support the ROLE program |
| Wild Seed Project | North Yarmouth, ME | $30,000 | 2025 | To implement experiential ecology programs in schools with accompanying teacher training |
| Appalachian Mountain Club | Boston, MA | $30,000 | 2025 | To support the Maine Woods Community Youth and Environment Program |
| Lake Stewards of Maine | Auburn, ME | $27,000 | 2025 | To support general operations and professional development |
| Northeastern University | Boston, MA | $27,000 | 2025 | For the Roux Institute to help environmental nonprofit organizations develop income |
| University of Maine Foundation | Orono, ME | $25,700 | 2025 | To support training for teachers to bring their classroom outdoors |
| Tree Street Youth | Lewiston, ME | $25,000 | 2025 | To expand three outdoor programs for youth of all ages |
| Maine Community Integration | Lewiston, ME | $25,000 | 2025 | To support programs that connect youth and adults to the outdoors with field trips and education |
| Natural Resources Council of Maine (NRCM) | Augusta, ME | $25,000 | 2025 | To provide general support |
| Quebec-Labrador Foundation | Farmington, ME | $25,000 | 2025 | Trail assessments and training on access for people with disabilities |
| Chewonki Foundation Inc | Wiscasset, ME | $25,000 | 2025 | To enable Maine students to participate in the Outdoor Classroom |
| Kennebec Estuary Land Trust | Bath, ME | $25,000 | 2025 | To support the Maine Trails Coalition |
| Gateway Community Services Maine | Portland, ME | $25,000 | 2025 | To support transportation, lodging, and staffing for outdoor experiences |
| Sierra Club Foundation | Oakland, CA | $25,000 | 2025 | To support education and mobilization activities conducted by Sierra Club Maine |
| The Ecology School | Saco, ME | $25,000 | 2025 | To provide Maine students with immersive ecology education |
| Lakes Environmental Association | Bridgton, ME | $25,000 | 2025 | To provide general support |
| Schoodic Institute at Acadia National Park | Winter Harbor, ME | $25,000 | 2025 | To expand the Schoodic Education Adventure for underserved Maine schools |
| Friends of Katahdin Woods and Waters | Portland, ME | $25,000 | 2025 | To support the Katahdin Learning Project |
| Maine Public | Lewiston, ME | $25,000 | 2025 | To enable the Climate Desk to hire a full-time editor |
| Cobscook Institute | Trescott Township, ME | $23,000 | 2025 | To expand the Midden Minders program to engage more students in Washington County |
| Khmer Maine | Portland, ME | $22,500 | 2025 | To host a monthly series of Indigenous learning events and outdoor trips |
| The Allagash Wilderness Waterway Foundation | Casco, ME | $22,000 | 2025 | To develop the canoe and leadership skills of Wabanaki Youth |
| Maine Academy of Modern Music | Portland, ME | $20,000 | 2025 | To provide general support |
| Center for an Ecology Based Economy | Norway, ME | $20,000 | 2025 | To provide general support |
| Waldo Theatre | Waldoboro, ME | $20,000 | 2025 | To provide general support |
| Healthy Acadia | Ellsworth, ME | $20,000 | 2025 | To coordinate and host Juneteenth Weekend on the Water events and a new swim program |
| IFKA Community Services | Lewiston, ME | $20,000 | 2025 | To connect immigrant youth to nature through hands-on activities |
| Portland Museum of Art | Portland, ME | $20,000 | 2025 | To support Learning and Community Collaboration |
| Palaver Strings | Portland, ME | $20,000 | 2025 | To provide general support |
| The Strand Theatre | Rockland, ME | $20,000 | 2025 | To provide general support |
| Portland Parks Conservancy | Portland, ME | $20,000 | 2025 | To run three sessions of Portland Youth Corps |
| Niweskok From the Stars to Seeds | Milford, ME | $20,000 | 2025 | To support Wabanaki Rematriation School |
Momentum Conservation
$625,000To provide technical and financial support to land trusts
Maine Association of Nonprofits
$88,000To support the Cultural Alliance of Maine's arts and for culture advocacy
To support the First Light program in increasing access to land and water for Wabanaki people
To conduct a landscape analysis of Maines Youth Climate Movement
To support the professional development of educators
Mayo Street Arts
$57,500To provide general support
Maine Audubon
$52,500To expand science-based environmental education to Lewiston and Bangor schools
To support a weekend-long gathering for the Maine dance community
Maine Lakes
$41,000To provide general support
President And Trustees Of Bates College
$40,000To support the Bates Dance Festival
Wabanaki Public Health and Wellness
$40,000To support the ongoing development and sustainability of its fundraising team
Maine GearShare
$40,000To provide general support
To support an arts retreat at Haystack for Maine LGBTQ+ high school students
To support grantmaking and convening in Maine
Climate Change for All Educators Inc
$30,000To establish the Maine Climate Education Hub
The Climate Initiative
$30,000To launch the Maine Collegiate Climate Policy Institute
To support Maine Land Trust Network's Land Trust Census
Rippleffect
$30,000To support the ROLE program
To implement experiential ecology programs in schools with accompanying teacher training
To support the Maine Woods Community Youth and Environment Program
Lake Stewards of Maine
$27,000To support general operations and professional development
For the Roux Institute to help environmental nonprofit organizations develop income
To support training for teachers to bring their classroom outdoors
To support programs that connect youth and adults to the outdoors with field trips and education
Quebec-Labrador Foundation
$25,000Trail assessments and training on access for people with disabilities
To enable Maine students to participate in the Outdoor Classroom
To support transportation, lodging, and staffing for outdoor experiences
To support education and mobilization activities conducted by Sierra Club Maine
The Ecology School
$25,000To provide Maine students with immersive ecology education
To expand the Schoodic Education Adventure for underserved Maine schools
Maine Public
$25,000To enable the Climate Desk to hire a full-time editor
Cobscook Institute
$23,000To expand the Midden Minders program to engage more students in Washington County
Khmer Maine
$22,500To host a monthly series of Indigenous learning events and outdoor trips
The Allagash Wilderness Waterway Foundation
$22,000To develop the canoe and leadership skills of Wabanaki Youth
Maine Academy of Modern Music
$20,000To provide general support
Center for an Ecology Based Economy
$20,000To provide general support
Waldo Theatre
$20,000To provide general support
To coordinate and host Juneteenth Weekend on the Water events and a new swim program
IFKA Community Services
$20,000To connect immigrant youth to nature through hands-on activities
Portland Museum of Art
$20,000To support Learning and Community Collaboration
Palaver Strings
$20,000To provide general support
The Strand Theatre
$20,000To provide general support
Portland Parks Conservancy
$20,000To run three sessions of Portland Youth Corps
Niweskok From the Stars to Seeds
$20,000To support Wabanaki Rematriation School