In accordance with the SWS USA SPA3 Investor (Stocks) Public Portfolio Investment Plan, ATVI was sold from the Public Portfolio on the 25th February, after its takeover was announced.
You can refer to the takeover rule in the Investment plan here.
As a result of the takeover ATVI will be removed from the SWS USA stocks for SPA3 Investor Watchlist at the forthcoming update release of Beyond Charts.