Amusingly,

[Zphal]

This semiconductor company site I got on to look up their Executive Team and Board Members happens to be having a virtual Easter Egg hunt to win Netflix vouchers. rofl

https://www.xfab.com/about-x-fab/events/virtual-easter-egg-hunt

So far I've found two:
https://www.xfab.com/markets/ (14-E)
https://www.xfab.com/about-x-fab/ (9-S)  

[Zphal]

https://www.xfab.com/about-x-fab/news/ (U-5)  

[Zphal]

https://www.xfab.com/technology/sic/ (X-1)  

[Zphal]

https://www.xfab.com/technology/rf/ (F-2)  

[Zphal]

https://www.xfab.com/en/mems0/mems-foundry-service/ (3-A)  

[Zphal]

https://www.xfab.com/mems0/mems-sensors-actuators/integrated-cmosmems/ (I-6)

https://www.xfab.com/service/ (U-8 )  

[Zphal]

https://www.xfab.com/service/resourcexplorer/ (S-12)

https://www.xfab.com/service/prototyping-support/mpw-schedule/ (B-4)  

[Zphal]

https://www.xfab.com/about-x-fab/events/webinar-overview/ (E-10)

Just four more somewhere... ninja  

[Zphal]

https://www.xfab.com/about-x-fab/contact-overview/ (A-11)  

[Zphal]

My guess is that the answer is in another language, since at present I have:

X-FABUI_US EAS_E_

So much for finding most and then guessing. lol  

[Zphal]

But I can't find the last three anywhere. stressed  

[Zphal]

I don't suppose anyone else can find 7, 13, and 15?  

[Zphal]

This is theoretically the entire Site Map: https://www.xfab.com/sitemap/

It'd make more sense if I was just missing ONE.  

[Zphal]

I AM guessing the last word is Easter.

Maybe 6 was supposed to be an L instead of an I? So it'd say "x-fabulous easter"?  

[TheLuckyOne149]

This was somewhat nice of you to post about this interesting Information. I hope this helps answer your question. Take care of yourself!