Barcelona delayed triggering the clause immediately in the hope they could negotiate a deal with Atletico that would allow them to pay the fee in installments. The numbers BarcaTimes highlighted on Twitter, citing Opta, speak for themselves.
The France global becomes Barca's third signing of the summer, following the arrivals of Frenkie de Jong and Neto.
According to the same story, FC Barcelona are hoping to use Coutinho as part of a package deal for the world's most expensive player Neymar this summer. Atletico claim they are due €80m more, because they feel the agreement between Barcelona and Griezmann predates the reduction in the buyout clause.
The buyout clause for the Frenchman, who rejected a move to FC Barcelona in 2018, has been set at €800 million.
He rejected an offer from Barcelona previous year and revealed his thought process in a documentary called The Decision.
The World Cup victor, 28, has signed a five-year deal with the Spanish giants after they activated the £107m clause in his deal with Atleti.
During five years with Atletico, Griezmann, a World Cup victor with France last summer, scored 133 goals in 257 appearances.
"It was also prior to the date on which the clause was modified the communication that the player made on May 14 announcing his disengagement from the club".
"I wanted to tell you that I've made the decision to leave, to experience different things and have new challenges", Griezmann told the Atletico website. He also won the Europa League, the UEFA Super Cup and the Spanish Super Cup in that time.
United Kingdom police investigate Kim Darroch cables
Speaking to reporters at the White House, Mr Trump said he had since been told Sir Kim had said "some very good things" about him. Meanwhile, Mr Trump has suggested he was too quick to denounce Sir Kim following the leak.