Additional Ventures Foundation
ActivePhilanthropy & VoluntarismFunds Individuals
About Additional Ventures Foundation
Additional Ventures' mission is to cure single ventricle heart disease through transformative research and strategic investments that revolutionize treatment and care.
Focus Areas
single ventricle heart diseasegenetics and developmental originstissue engineering and regenerative medicinecomputational modelingtranslational device and therapeutic developmentlymphatic biologyFontan-associated liver diseasearrhythmia and ventricular failurepersonalized medicineclinical outcomes and sequelae
Who They Fund
infants and children with single ventricle/congenital heart defects
About Additional Ventures Foundation
Additional Ventures Foundation concentrates its grantmaking on curing single ventricle heart disease, and that focus shows up in a mix of large research awards and targeted investments in therapies and devices. Two of its largest recent grants went to The J David Gladstone Institutes, with $1,200,000 in both 2024 and 2025 for an Innovation Award, signaling repeated support for research aimed at advancing the field. The foundation also backed Renata Medical Inc with $1,100,000 in 2025 for transcatheter Fontan shunt development, a clear example of its interest in translating research into clinical solutions. Other major awards support collaborative research networks, device design, and cardiovascular studies for children and adults living with single ventricle conditions. The recipient mix includes universities, children’s hospitals, research institutes, and medtech companies, which fits a strategy that links discovery science, translational development, and clinical care. Across the recent grant list, the foundation appears to favor funding that can move from lab-based investigation toward practical treatment advances for infants, children, and cardiac patients with complex congenital heart disease.
What Additional Ventures Foundation Funds
In collaborative research, Additional Ventures Foundation has supported multi-institution work through CURES Collaborative grants, including $717,975 to Nationwide Children's Hospital Inc in 2024 and $556,817 to Carnegie Mellon University in 2024. It has also backed clinical-network work with $415,000 to Cincinnati Children's Hospital Medical Center in 2023 for the Advanced Cardiac Therapies Improving Outcomes Network. For single ventricle research specifically, the foundation funded New York University with $440,000 in 2024 and the University of Virginia with $282,614 in 2025 for the Single Ventricle Research Fund. It also supports device development, including $500,000 to Star Bp Inc in 2024 for pediatric ventricular assist device design and $1,100,000 to Renata Medical Inc in 2025 for transcatheter Fontan shunt development.
How Additional Ventures Foundation Gives
Typical grant sizes cluster tightly around the mid-six-figure range: p25 is $112,644, median is $219,877, and p75 is $220,000. The recent record includes repeated awards to the same organizations across multiple years, such as The J David Gladstone Institutes, Boston Children's Hospital, Nationwide Children's Hospital Inc, Carnegie Mellon University, Washington University in St Louis, Stanford-related entities, and the University of Virginia. That pattern suggests ongoing programmatic support rather than one-off gifts. Additional Ventures Foundation is a regular funder and also funds individuals. The grant list reflects a research-grant style of giving, with awards tied to named programs, collaboratives, and innovation or career-development tracks.
Financial Snapshot
Annual Giving
$14.9M
Total Assets
$220.3M
Total Revenue
$29.1M
Total Expenses
$19.5M
Typical Grant Size
Most grants fall between $113K and $220K, with a median of $220K.
25th Percentile
$113K
Median
$220K
75th Percentile
$220K
Geographic Reach
National20 states funded
Funding intensity
LowHigh
Headquarters
Funding intensity
LowHigh
Where Additional Ventures Foundation Funds
Top 9 recipient countries by grant volume for Additional Ventures Foundation.
| Rank | Country | Grants | Total | Share |
|---|---|---|---|---|
| 1 | United StatesDomestic | 190 | $43.4M | 84.1% |
| 2 | United Kingdom |
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