Co. Abbreviation and Punctuation
Co. is a written abbreviation for “company,” while dictionaries also show unpunctuated Co in some varieties and names. Official company styling and house style should control the final form.
“Co.” means “company.” Preserve the organization’s official name; outside a name, follow the relevant house style on whether to use the period.
Key details
Important caveats
Name Boundary
When Co/Co. is part of an official company name, reproduce the organization’s published styling rather than normalizing it.
Further guidance
Meaning
Cambridge records Co. as an abbreviation for company and also shows Co without a period in Learner’s Dictionary examples.
Practical Application
Preserve Co. or Co exactly when it is part of an organization’s official name. Outside a proper name, follow the governing dictionary/house style for the abbreviation and its period rather than normalizing all occurrences to one form.
Reader Check
Is this an official organization name whose published styling must be preserved, or a generic abbreviation governed by house style?
Worked Example
Write “Example Co. Ltd.” if that is the entity’s official styling; do not silently change it to “Example Co Ltd.” merely for internal consistency.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Co. — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Company abbreviation and documented punctuation variants