Businesses with K 

 Shop names
Pop group names
 Novel U

At the beginning of a word the choice for the 'k' sound is usually the letter 'c' before 'o', 'a', 'u', 'r', or 'l', the letter 'k' before 'e' or 'i', and 'q' for words sounding 'kw'. Hence businesses use 'k' for many novel spellings.

All Kleen N Fix
Cabbages and Kinx
Kat Tracks Productions
Canadian KidsKamp
The Cutting Korner
Kar spelling for car  
Easi-Kleen Distributors
Fab-Kote Industries
K K Korner Grocery
Karibu Smoke Shop
Karpet KingKem-Tec
Kennedy Kobbler Shoe Repair
Kiddee Kare Childminding
Kiddies Korner Preschool
Klub spelling for club
Kidz Kutz Hair Design
Kindness Skool Koncept
King Koin Dry Cleaning Centre
Kleen-Flo Tumbler
Kool Zone Beverages
Krazy Kangaroo
Krystal Limousines Service
Krustys Bakery
Kuddel Muddel Kids
Kustom Kolors
Kwality Sweets
Kwik Air
Kwick Clean & Green Ltd
Kwik Kafe Ltd
Kwik Kopy Printing
Kwik Mart
Squeegee Kleen

Kw spelling for qu

Kleen spelling for clean

kutz spelling for cuts

This use of 'k' for 'c' has occurred in product-names etc since at least the 1920s, when Louise Pound said 'All in all, there is no mistaking the kall of "k" over our kountry, our kurious kontemporary kraving for it, and its konspicuous use in the klever koinages of kommerce'.

Korner spelling for Corner                      Kook spelling for Cook