Companies

These are all significant private sector companies, appearing in Season 1, 2 and 3 of House of Cards.

Characters are listed after importance (times of appearance with the company). Italic marked characters left the corresponding company. The length of characters appearance with a company is marked right off the character.

News companies

• Washington Herald - Zoe Barnes (Chapter 1-4), Janine Skorsky (Chapter 1-9), Lucas Goodwin (Chapter 1-17), Tom Hammerschmidt (Chapter 1-5), Margaret Tilden (before Chapter 1-?)
• Slugline - Zoe Barnes (Chapter 5-14), Janine Skorsky (Chapter 10-14), Carly Heath (Chapter 5-13)
• The Wall Street Telegraph - Ayla Sayyad (Chapter ?-29), Kate Baldwin (Chapter 30-?)
• NY Examiner - No character - Responsible for leaking photos evidencing Claire Underwood's affair with Adam Galloway.

Environment oriented companies

• Clean Water Initiative - Claire Underwood (Chapter 1-14), Gillian Cole (Chapter ?-?), Evelyn Baxter (Chapter 1-2)
• SanCorp - Remy Danton (Chapter 1-26)
• Clayton West - Raymond Tusk (founder and owner of a majority of shares), Xander Feng (shares holder),
• Province Trust - No character (Henry Chapman (lobbyist seen in Chapter 1))
• Corbet Rafting Inc. - Tim Corbet (Never appeared with - just mentioned as the CEO in Chapter 37)

Transportation companies

• Pioneer Airlines - Raymond Tusk (shares holder), Garrett Walker (unknown - left before Chapter 1)
• Dunbar Armored Cars - Heather Dunbar (financial support for Democratic nomination race)
• SpaceX - Connor Ellis (Chapter 20-?)

Gambling companies

• Adaho Gaming Casino - Daniel Lanagin (Chapter 20), Tammy (Chapter 20)

Telecommunication companies

• AT&T - No character - Mentioned as Lucas Goodwin is trying to break into their data plant and later, as Gavin Orsay is coercing the FBI with publishing the gained AT&T access codes.

Photography oriented companies

• Cannon - Adam Galloway (indirectly by using their photographing equipment)

Law companies

• Glandon Hill - Remy Danton (Chapter 1-26)

Food oriented companies

• Freddy's BBQ Joint - Freddy Hayes (Chapter 1-24)

Web companies

• Google - Gillian Cole (unknown status)