Three Billionaires Behind Pfizer's Vaccine Partner BioNTech Are $2 Billion Richer After It Announces Covid-19 Vaccine Results The announcement that the Pfizer-BioNTech vaccine could be up to 90% effective against the coronavirus led to a surge in BioNTech’s stock, adding billions to the net worths of its  founder Uğur Şahin and its largest investors, Thomas and Andreas Struengmann.