The only game publisher that comes close to THQ in its commitment to mobile is Ubisoft. Well, sort of.

The Guillemot brothers who founded and own Ubisoft started Gameloft as
a dedicated mobile game publisher in 1999, but it was never a proper
subsidiary. Instead it was majority-owned by the brothers as a separate
private company (albeit one with exclusive access to the Ubi crown
jewels). Since then it has been floated to leave the main shareholders
as the brothers with 30 percent, Ubi with 29 percent, and the public
with 34 percent.

In its six years Gameloft has devoured money. But in 2005 the payoff
started to come. It posted revenues of $12 million (9.9 million euros)
in the first quarter of 2005, a 146 percent increase over the previous
year, and the eighth straight quarter in which the company achieved
three-figure growth.

Amazingly, Gameloft has nearly one thousand employees at development
studios and offices in New York, San Francisco, Montreal, Quebec,
Paris, London, Düsseldorf, Milan, Barcelona, Beijing, Tokyo, and Hong
Kong. It has released games through more than 130 partner operators.

The financial success of 2005 has silenced voices that said Gameloft
was too reliant on hardcore gamer Ubi licences such as Prince of
Persia, Splinter Cell, and Rainbow Six. Gameloft has addressed this by
signing partnership agreements with media giants such as Universal
Pictures, Paramount, and DreamWorks. This has yielded titles such as
War of the Worlds and King Kong. Meanwhile there’s also been an effort
to develop more casual fare: Solitaire and Football Trivia, for example.