Formal:
* "The document contained information pertaining to the company's financial performance."
* "The professor will be giving a lecture pertaining to the history of the American Revolution."
* "The research study focused on issues pertaining to environmental sustainability."
Informal:
* "I have a question pertaining to the new software update."
* "The meeting will discuss matters pertaining to the upcoming holiday season."
* "Let's focus on the issues pertaining to the project deadline."
Note: "Pertaining to" is often used interchangeably with "related to," "concerning," or "regarding."