
Self-Managed
William K Bonac is a globally recognized bodybuilding star and 2019 Mr. O, known for his elite stage presence, intense training content, and powerful brand appeal. With a strong presence across competition prep, fitness lifestyle, and signature apparel promotions, he is a compelling partner for campaigns that want authenticity, performance, and serious reach in the bodybuilding world.
 William Bonac is an IFBB Professional bodybuilder and sponsored athlete from Netherlands. He was born in Ghana in the year 1982 and left the country when he was five (5) years old. William returned to Ghana at the age of 12 and went back to the Netherlands a year later. At age 13, William Bonac started his bodybuilding training. In 2008, William Bonac had his first Amateur show. COMPETITION AND CAREER • William “The Conqueror” Bonac has truly earned his nickname and few competitors in the open division have been as consistent as he has. Bonac continues to improve every year and that’s really what separates him from most bodybuilders. • Bonac garnered attention after placing third at the 2011 Arnold Amateur in the Men’s Heavyweight. And from there, we saw the gradual climb that would lead to his best Olympia finish in 2019, placing right behind the Mr. Olympia champion Brandon Curry. • He was the runner-up at the Arnold Classic as well and his most notable victories were the prestigious Arnold Classic shows in 2018 and 2020. COMPETITION HISTORY *2022- Boston pro - 1st *2022 - Arnold Classic - 2nd • 2020 Arnold Classic – • 2019 Olympia – 2nd • 2019 Arnold Classic Australia • 2019 Arnold Classic – • 2018 Olympia – 4th • 2018 Arnold Classic Australia • 2018 Arnold Classic – 1st – 1st 2nd – 2nd 1st • 2017 Prague Pro – 2nd • 2017 Arnold Classic Europe • 2017 Olympia – 3rd • 2016 Olympia Europe • 2016 Prague Pro – 1st – 2nd • 2016 Kuwait Pro • 2016 Arnold Classic Europe • 2016 Olympia – 5th • 2016 Nordic Pro – 1st – 3rd • 2015 San Marino Pro • 2015 Dayana Cadeau Pro • 2015 Nordic Pro – 1st • 2015 Prague Pro – 5th • 2015 Arnold Classic Europe • 2015 Olympia – 8th • 2015 San Marina Pro • 2014 Prague Pro – 8th • 2014 Arnold Classic Europe • 2014 Olympia – 15th • 2014 Tampa Pro – 2nd – 3rd – 5th – 2nd – 1st – 6th – 11th – 6th • 2014 Golden State Pro • 2014 Arnold Classic South America • 2014 Australia Pro Grand Prix – 2nd • 2013 Prague Pro – 5th • 2011 Arnold Amateur Men’s Bodybuilding Heavy – 3rd
Arnold Classic
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1 post & 1 story with the William K Bonac promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have William K Bonac make a live appearance at your next event
Brands can sponsor William K Bonac on OpenSponsorship by creating a free account, browsing William K Bonac's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this athlete.
William K Bonac is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this athlete.
According to OpenSponsorship, estimated pricing to sponsor William K Bonac starts at $11,520 for a social media post, $14,400 for a appearance and $86,400 for a brand ambassador campaign. Final rates depend on deliverables, usage rights, and campaign scope. Sign up on OpenSponsorship to view packages and send a proposal.
According to OpenSponsorship, William K Bonac's audience includes 908K+ Instagram followers, interests including Bodybuilding, Music, Fashion, Travel, based in Schiphol, North Holland, Netherlands. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

Genisys Credit Union, headquartered in Auburn Hills, Michigan, has done something most brands never do with athlete sponsorship: it kept renewing. What started as a single partnership with Detroit Lions tight end Sam LaPorta has become a multi-year, two-athlete program that Genisys has renewed and expanded every season since 2024, adding Lions wide receiver Isaac TeSlaa in 2025 and renewing him again in 2026.
October 6, 2026