Universal Music Group | UMG explicitly states that they do not accept song demo submissions.
Please read the disclaimer below to better understand their policies.

How to submit a demo to Universal Music Group or UMG? Submissions should be directed to UMG’s record labels, but kindly note that they are unable to accept unsolicited material. Typically, demos are recommended to one of our labels’ A&R departments by a manager, agent, producer, radio DJ or other industry professional. Another option for unsigned artists is UMG’s site, Spinnup, which offers both digital distribution and has a network of scouts who have a relationship with many of Universal Music’s labels.

Please be aware: UMG employees will NEVER request anything of value in exchange for submitting music or securing a contract with our labels, or for your participation in any other activities in which UMG is engaged. Such action is directly contrary to UMG’s Code of Conduct. If anyone claiming to be affiliated with UMG fraudulently demands money from you to submit a demo, or as a purported “contract fee” or to defray “travel costs,” please be aware that this is a scam.

It’s clear that Universal Music Group cannot take unsolicited material from an independent musician.
This is why we are here and recommend that you submit your music to an A&R executive on AVENUEAR. A&R executives on AVENUEAR accept demo submissions. Some of our A&R executives work for, or have worked with some of these labels and their A7R managers. Additionally, if our A&R executives don’t currently work for Universal Music Group they can most likely help you submit a demo song to another A&R manager at Universal Music Group.