QUOTE (thorya @ May 3 2012, 08:39 PM)

Isn't AT&T essentially a "media" company? I've always assumed that telecommunications and advertising was lumped in with media. I would assume that Horizon probably has a huge matrix provider services division.
AT&T primary business remains telecommunications. Their interest in media doesn't go further than moving Internet media content, video sharing services and the like. But they do not create content (if you except funding political ads during electoral year, that's it).
According to
Corporate Enclaves and
Corporate Guide, Horizon has assets in medias at large, advertising, PR communications, online services, software, personal electronics, Matrix infrastructures, satellites, space launch, and real estate.
QUOTE (thorya @ May 3 2012, 08:39 PM)

Honestly, I have a lot of trouble figuring out what AA and A corps do when you have the mega's controlling everything. And what companies are the banks and energy suppliers of Shadowrun, since as far as I know, no company is known for Oil, Electricity, and other utilities? Though, S-K is in finance and chemicals and Wuxing is the only one that seems to be heavily banking focused.
First, AA-rated corporation also are megacorporations. AAA-rated corporation are
prime megacorporations.
AAA control the world much like the US and Soviet Union controlled the world during the Cold War. They have a lot of influence, and anyone that really bother them is canned. But there nonetheless are a lot of smaller players around, which play their own role in keeping the balance. In Seattle, take Federated-Boeing for instance: it was big enough to fend off a takeover attempt by MCT in the early 40ies, but at the same time, its main supplier and reseller is Ares Macrotechnology. A corporation like Evo or Wuxing that doesn't have enough buildings in Seattle to justify running its own power plant would buy electricity from Gaeatronics instead of Shiawase Atomics. And Shiawase and Horizon probably prefered to deal with police forces from a smaller corp like Lone Star than with Ares-owned Knight Errant, rather than trying to compete for the contract. AAA prime megacorporations are huge and very diversified, but they all have locations and fields were they are weak.
SR often treated oil as a fading industry, with lots of electrical cars and the likes. Most of the oil companies, United Oil, Global Sandstorm..., are in the second- or third-tier. Aztechnology owns Pemex, Saeder-Krupp also has several oil subsidiaries and used to pull the strings in the Middle East (though maybe with Halliburton-type activities rather than just oil production), with a now growing competition from Evo. Saeder-Krupp and Shiawase also have large energy division (Ruhr Nuklear and Shiawase Atomics).
Banking has been also mostly left out at start, but the trend has been changing. Ares Macrotechnology owns Bank of America, Neonet owns Silveril Investments, Renraku owns Globank, Saeder-Krupp owns Commerbank, Schweizere Bankverein and Nippon Credit & Trust, Shiawase owns Shiwase House Bank, Wuxing owns Wuxing Financial Services, Albion Mutual Funds and now the Malaysian Independant Bank. There also are independent AA HKB, Frankfurter Bankverein and Pacific Rim Bank & Financial Services.
The fact that SR major economical actors are very diversified conglomerates would radically change the way the financial sector would work. Within a megacorporation, there would always be a number of subsidiaries with cash excess who can lend to subsidiaries with growth potential. Megacorporation also needs their own banking system to pay their employees, issue corporate scrip and handle intra-corporate business. This would actually be very similar to how Japanese zaibatsu worked prior to WW2.