Video game-maker Sega Sammy Holdings has offered to buy Rovio Entertainment in a deal that values the Finland-based creator of Angry Birds at about €706 million (¥103.6 billion).

Sega offered €9.25 per share in cash to the shareholders and €1.48 per option to the option holders of Rovio, according to a statement Monday. The Finnish company’s board unanimously recommended shareholders accept the offer, which is backed by 49% of shareholders including Rovio’s founding Hed family.

Rovio shares rose as much as 19% to trade at €9.17 each in Helsinki on Monday. The stock has surged more than 50% for the year to date amid deal speculation.