Each figure is one return, as filed. A grantee's grants out are not shown to be the money it received: money is interchangeable, and two organizations' tax years can cover different months, so a grant received in one organization's 2023 can sit beside grants made in the other's 2023 without being the same dollars. Only grants over $5,000 are itemized, and a private foundation's grants are not followed here: it reports them in its 990-PF's Part XV, which names no recipient EIN to join.

1. CHILDRENS HOSPITAL CORPORATION EIN 04-2774441

   Received $216,392 from PHELAN MCDERMID SYNDROME FOUNDATION · 2023, 2024 returns

   Its grants paid, 2023: $15,211,936

   Its grants paid, 2024: $16,371,788

   • City of Boston · 2024

     $2,686,243

   • City of Boston · 2023

     $2,007,287

   • Boston Public Schools · 2024

     $1,210,230

   • Boston Public Schools · 2023

     $822,000

   • Boston Public Health Commission · 2023

     $410,000

2. ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI EIN 13-6171197

   Received $120,900 from PHELAN MCDERMID SYNDROME FOUNDATION · 2022, 2024 returns

   Its grants paid, 2022: $7,913,268

   Its grants paid, 2024: $12,258,080

   • THE MOUNT SINAI HOSPITAL · 2024

     $559,300

   • THE MOUNT SINAI MEDICAL CENTER · 2024

     $559,300

   • THE MOUNT SINAI HOSPITAL · 2022

     $91,757

   • THE MOUNT SINAI MEDICAL CENTER · 2022

     $91,757

3. CHILDRENS HOSPITAL LOS ANGELES EIN 95-1690977

   Received $100,000 from PHELAN MCDERMID SYNDROME FOUNDATION · 2025 return

   No itemized grants on its 2025 return.

4. NORTHEASTERN UNIVERSITY EIN 04-1679980

   Received $55,000 from PHELAN MCDERMID SYNDROME FOUNDATION · 2024 return

   No itemized grants on its 2024 return.

5. CLEMSON UNIVERSITY FOUNDATION EIN 57-0426335

   Received $55,000 from PHELAN MCDERMID SYNDROME FOUNDATION · 2023 return

   Its grants paid, 2023: $36,717,831

   • CLEMSON UNIVERSITY · 2023

     $33,446,392

   • CLEMSON UNIVERSITY CONTINUING EDUCATION & CONFERENCE COMPLEX CORPORATION · 2023

     $2,587,705

6. UNIVERSITY OF MIAMI EIN 59-0624458

   Received $55,000 from PHELAN MCDERMID SYNDROME FOUNDATION · 2023 return

   Its grants paid, 2023: $743,540,372

   • THE HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE · 2023

     $6,085,390

   • THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK · 2023

     $5,026,024

   • EMORY UNIVERSITY · 2023

     $3,175,625

   • THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA · 2023

     $2,953,760

   • SAN JOSE STATE UNIVERSITY RESEARCH FOUNDATION · 2023

     $2,936,566

7. AUTISM SCIENCE FOUNDATION EIN 26-4522309

   Received $10,000 from PHELAN MCDERMID SYNDROME FOUNDATION · 2023 return

   Its grants paid, 2023: $301,347

   • UNIVERSITY OF CALIFORNIA LOS ANGELES · 2023

     $60,000

   • JOHNS HOPKINS SCHOOL OF MEDICINE · 2023

     $50,000

   • UNIVERSITY OF CALIFORNIA SAN DIEGO · 2023

     $50,000

   • UNIVERSITY OF NORTH CAROLINA CHAPEL HILL · 2023

     $39,000

   • RUTGERS UNIVERSITY · 2023

     $35,000

The API serves every itemized grant, in both directions.