I thought you'd want to know...

Meaning

I believe this information is relevant to you.

Examples

• John: <b>I thought you'd want to know</b>, the conference is fully booked.
• Alice: Oh, that's good to know. Thanks for letting me know.
• John: No problem. <b>I thought you'd want to know</b>, as you were planning to attend.
• Alice: I appreciate the heads-up.