Video game company Activision Blizzard Inc. is preparing to lay off nearly 400 employees in its mobile gaming divisions in Santa Monica and Irvine, as part of efforts to eliminate staff redundancies following its $75.4 billion merger with Microsoft Corp. last year.

These new layoffs add to the 1,003 job cuts Activision has already implemented over the past year, affecting various locations from Novato and Foster City in Northern California to offices in Southern California, according to filings with the state’s Employment Development Department (EDD).

Activision Blizzard, acquired during last year’s merger with Microsoft, informed the EDD that 140 positions would be cut starting Oct. 11 at its Blizzard Entertainment office in Irvine. The affected jobs span across multiple roles, including accountants, software engineers, human resources directors, artists, game designers, producers, and a vice president, as detailed in a letter from Leslie Campbell, Activision Blizzard’s HR director.

Campbell was unavailable for comment on the recently announced 393 layoffs. However, Activision Blizzard spokesperson Delay Simmons confirmed via email that these cuts are part of previously announced reductions, focusing primarily on corporate and support roles, along with some gaming teams.

The layoffs also impact mobile game developers working on Call of Duty: Warzone, World of Warcraft (WoW), and an underperforming third game developed in Irvine, according to Michael Pachter, a gaming analyst at Wedbush Securities. Pachter pointed out that overlapping teams contributed to the redundancies, especially in mobile game design.

Additionally, the EDD filings show that 143 jobs will be cut at Activision’s Playa Vista studio and 110 at the Santa Monica studio. Layoffs at all three locations will be completed by the end of the year.

These layoffs follow Microsoft Gaming’s previous announcements of 1,900 layoffs in January across its Activision Blizzard, Xbox, and ZeniMax Media units, along with another 650 job cuts earlier this month. The reductions come after regulatory concerns that Microsoft’s acquisition of Activision Blizzard would reduce competition in the gaming industry.