Largely? Pharmaceutical companies only make up 3.8% of revenue according to the document you posted.
Food producers pay the AHA for use of the “Heart-Check” certification mark on certain products, like meat and cereal.
The maker of Crisco virtually launched the AHA as a nation-wide powerhouse in 1948 by designating a $17 million grant.
Where is and how much of that type of funding accounted?
Largely pharmaceutical companies[1] https://www.heart.org/-/media/Files/Finance/21_22_Pharma_Fun...
Novartis Novo Nordisk Inc. Pfizer Alexion Pharmaceuticals Inc. Bayer Healthcare Pharmaceuticals Inc Boehringer Ingelheim Pharmaceuticals
all being the top contributors.