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Form 990-PFTax year 2024EIN 81-4429034

Additional Ventures Foundation

A private foundation in Palo Alto, CA. Its return for tax year 2024 lists 68 grants and $17.2 million paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

Tax year 2024 (period ending Dec 31, 2024), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

7 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2024

    $17,151,264

    Grants listed
    68
    Assets, end of year
    $220,336,715

  • Tax year 2023

    $16,550,146

    Grants listed
    79
    Assets, end of year
    $206,084,034

  • Tax year 2022

    $11,920,946

    Grants listed
    64
    Assets, end of year
    $180,921,457

  • Tax year 2021

    $8,270,706

    Grants listed
    41
    Assets, end of year
    $212,172,958

  • Tax year 2020

    $3,952,577

    Grants listed
    6
    Assets, end of year
    $175,487,786

  • Tax year 2019

    $7,049,988

    Grants listed
    11
    Assets, end of year
    $144,395,484

  • Tax year 2018

    $1,673,868

    Grants listed
    3
    Assets, end of year
    $120,152,270

Grants paid in 2024

68 grants, largest first

As listed on the return.

  1. The J David Gladstone InstitutesSan Francisco, CA

    Innovation award

    $1,200,000
  2. Renata Medical IncNewport Beach, CA

    Transcatheter fontan shunt development

    $1,100,000
  3. Boston Children's HospitalBoston, MA

    Force fund

    $934,317
  4. Nationwide Children's Hospital IncColumbus, OH

    Cures collaborative

    $594,872
  5. Carnegie Mellon UniversityPittsburgh, PA

    Cures collaborative

    $493,452
  6. Washington University in St LouisSt Louis, MO

    Cures collaborative

    $381,383
  7. The Board of Trustees of the Leland Stanford Junior UniversityRedwood City, CA

    Cures collaborative

    $322,050
  8. Emory UniversityAtlanta, GA

    Cures collaborative

    $302,993
  9. Irccs Azienda Ospedaliero Universitaria Di BolognaBologna, Italy

    Single ventricle research fund

    $295,918
  10. The Rector & Visitors of the University of VirginiaCharlottesvle, VA

    Single ventricle research fund

    $282,614
  11. Imperial College of Science Technology and MedicineLondon, United Kingdom

    Single ventricle research fund

    $264,436
  12. Icahn School of Medicine at Mount SinaiNew York, NY

    Cures collaborative

    $261,404
  13. Sanford Burnham Prebys Medical Discovery InstituteLa Jolla, CA

    Catalyst to independence award

    $247,933
  14. The Board of Trustees of the Leland Stanford Junior UniversityRedwood City, CA

    Catalyst to independence award

    $241,941
  15. The Board of Trustees of the Leland Stanford Junior UniversityRedwood City, CA

    Cures collaborative

    $233,359
  16. Catholic University of LeuvenBelgium

    Single ventricle research fund

    $230,000
  17. Children's Hospital Los AngelesLos Angeles, CA

    Single ventricle research fund

    $227,998
  18. Research Institute at Nationwide Children's HospitalColumbus, OH

    Single ventricle research fund

    $225,412
  19. Yale UniversityNew Haven, CT

    Single ventricle research fund

    $221,347
  20. The Hospital for Sick ChildrenToronto, Canada

    Single ventricle research fund

    $221,200
  21. California Institute of TechnologyPasadena, CA

    Single ventricle research fund

    $220,000
  22. Children's Hospital Medical CenterCincinnati, OH

    Single ventricle research fund

    $220,000
  23. Children's Hospital Medical CenterCincinnati, OH

    Single ventricle research fund

    $220,000
  24. Cornell UniversityIthaca, NY

    Single ventricle research fund

    $220,000
  25. Duke UniversityDurham, NC

    Single ventricle research fund

    $220,000
  26. Emory UniversityAtlanta, GA

    Single ventricle research fund

    $220,000
  27. Icahn School of Medicine at Mount SinaiNew York, NY

    Single ventricle research fund

    $220,000
  28. Imagine InstituteParis, France

    Single ventricle research fund

    $220,000
  29. Indiana UniversityBloomington, IN

    Single ventricle research fund

    $220,000
  30. Massachusetts General HospitalBoston, MA

    Single ventricle research fund

    $220,000
  31. Nationwide Children's Hospital IncColumbus, OH

    Single ventricle research fund

    $220,000
  32. New York UniversityNew York, NY

    Single ventricle research fund

    $220,000
  33. Regents of the University of California at San DiegoLa Jolla, CA

    Single ventricle research fund

    $220,000
  34. Regents of the University of California at San DiegoLa Jolla, CA

    Single ventricle research fund

    $220,000
  35. Regents of the University of California San FranciscoSan Francisco, CA

    Single ventricle research fund

    $220,000
  36. The Board of Trustees of the Leland Stanford Junior UniversityRedwood City, CA

    Single ventricle research fund

    $220,000
  37. The Children's Hospital of PhiladelphiaPhiladelphia, PA

    Single ventricle research fund

    $220,000
  38. Universita Degli Studi Di TorinoTorino, Italy

    Single ventricle research fund

    $220,000
  39. University Health NetworkToronto, Canada

    Single ventricle research fund

    $220,000
  40. University of PittsburghPittsburgh, PA

    Single ventricle research fund

    $220,000
  41. University of South FloridaTampa, FL

    Single ventricle research fund

    $220,000
  42. Washington University in St LouisSt Louis, MO

    Single ventricle research fund

    $220,000
  43. Boston Children's HospitalBoston, MA

    Single ventricle research fund

    $219,901
  44. Baylor College of MedicineHouston, TX

    Single ventricle research fund

    $219,877
  45. The University of Texas Southwestern Medical CenterDallas, TX

    Single ventricle research fund

    $219,773
  46. Seattle Children's HospitalSeattle, WA

    Single ventricle research fund

    $219,095
  47. Icahn School of Medicine at Mount SinaiNew York, NY

    Single ventricle research fund

    $218,508
  48. The Children's Hospital of PhiladelphiaPhiladelphia, PA

    Single ventricle research fund

    $217,637
  49. The Children's Mercy HospitalKansas City, MO

    Single ventricle research fund

    $216,710
  50. The Children's Hospital of PhiladelphiaPhiladelphia, PA

    Single ventricle research fund

    $209,923
  51. Baylor College of MedicineHouston, TX

    Single ventricle research fund

    $208,396
  52. University of Southern CaliforniaLos Angeles, CA

    Single ventricle research fund

    $208,162
  53. The Chancellor Masters and Scholars of the University of OxfordOxford, United Kingdom

    Single ventricle research fund

    $198,736
  54. Regents of the University of ColoradoDenver, CO

    Single ventricle research fund

    $198,578
  55. The Medical College of Wisconsin IncMilwaukee, WI

    Single ventricle research fund

    $191,518
  56. Northwestern UniversityEvanston, IL

    Catalyst to independence award

    $185,538
  57. The Governors of the University of AlbertaEdmonton, Canada

    Single ventricle research fund

    $177,483
  58. Yale UniversityNew Haven, CT

    Cures collaborative

    $150,420
  59. The J David Gladstone InstitutesSan Francisco, CA

    Catalyst to independence award

    $145,098
  60. Trustees of the University of PennsylvaniaPhiladelphia, PA

    Catalyst to independence award

    $130,257
  61. University College LondonLondon, United Kingdom

    Single ventricle research fund

    $130,081
  62. Renata Medical IncNewport Beach, CA

    Research surrounding viability of fontan growth shunt

    $130,000
  63. Boston Children's HospitalBoston, MA

    Catalyst to independence award

    $125,444
  64. Life Sciences Research FoundationCharlotte, NC

    Postdoctoral award program

    $70,000
  65. Centre Hospitalier Universitaire Sainte-JustineCanada

    2024 weinstein conference

    $20,000
  66. North American Vascular Biology Organization IncGermantown, MD

    Vascular biology 2024 event

    $10,000
  67. Charles UniversityCzech Republic

    International cardiovascular development and regeneration meeting

    $5,000
  68. Gordon Research ConferencesE Greenwich, RI

    Cardiac arrhythmia mechanisms event

    $2,500

Approved for future payment

19 grants

Approved in 2024 and not yet paid.

  1. Monash UniversityMulgrave, Australia

    Single ventricle research fund

    $546,113
  2. Sanford Burnham Prebys Medical Discovery InstituteLa Jolla, CA

    Catalyst to independence award

    $503,608
  3. The Governors of the University of AlbertaEdmonton, Canada

    Single ventricle research fund

    $482,223
  4. The Medical College of Wisconsin IncMilwaukee, WI

    Single ventricle research fund

    $468,482
  5. Baylor College of MedicineHouston, TX

    Single ventricle research fund

    $451,604
  6. The Children's Hospital of PhiladelphiaPhiladelphia, PA

    Single ventricle research fund

    $450,077
  7. Icahn School of Medicine at Mount SinaiNew York, NY

    Single ventricle research fund

    $441,417
  8. The University of Texas Southwestern Medical CenterDallas, TX

    Single ventricle research fund

    $440,227
  9. Children's Hospital Medical CenterCincinnati, OH

    Single ventricle research fund

    $440,000
  10. Nationwide Children's Hospital IncColumbus, OH

    Single ventricle research fund

    $440,000
  11. University Health NetworkToronto, Canada

    Single ventricle research fund

    $440,000
  12. University of PittsburghPittsburgh, PA

    Single ventricle research fund

    $440,000
  13. Washington University in St LouisSt Louis, MO

    Single ventricle research fund

    $440,000
  14. Research Institute at Nationwide Children's HospitalColumbus, OH

    Single ventricle research fund

    $434,588
  15. University of Southern CaliforniaLos Angeles, CA

    Single ventricle research fund

    $417,325
  16. Trustees of the University of PennsylvaniaPhiladelphia, PA

    Catalyst to independence award

    $378,854
  17. Irccs Azienda Ospedaliero Universitaria Di BolognaBologna, Italy

    Single ventricle research fund

    $362,986
  18. Children's National Medical CenterWashington, DC

    12th annual symposium on pediatric device innovation

    $150,000
  19. The Children's Hospital of PhiladelphiaPhiladelphia, PA

    Cardiology 2025 educational grant

    $10,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education17 grants $3,568,08345% of the total
  2. Health9 grants $2,604,37033% of the total
  3. Medical research3 grants $1,593,03120% of the total
  4. Sports and recreation1 grant $185,5382% of the total
  5. Science and technology1 grant $2,500<1% of the total

By State

Grants to organizations with a US address, latest year.

  1. California15 grants $5,156,541
  2. Massachusetts4 grants $1,499,662
  3. Pennsylvania6 grants $1,491,269
  4. Ohio5 grants $1,480,284
  5. New York5 grants $1,139,912
  6. Missouri3 grants $818,093
  7. Texas3 grants $648,046
  8. Georgia2 grants $522,993
  9. Connecticut2 grants $371,767
  10. North Carolina2 grants $290,000

Officers, directors and trustees

4 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Erin HoffmannPRESIDENT/CHAIRMAN/DIRECTOR Hours 6Pay $0
  • Michael SchroepferCFO/DIRECTOR Hours 1Pay $0
  • Tom Van Loben SelsSECRETARY Hours 1Pay $0
  • Kirstie KellerCEO Hours 40Pay $309,728

The return

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