I went to my local HSBC bank and noticed a sticker on the door for "Wells Fargo Alarm Services".
You can see the sticker on the lower-left corner of the following picture:
While I was waiting to have my check cashed, I asked the teller if HSBC is affiliated with Wells Fargo Bank. She said, "no". I looked up Wells Fargo Alarm Services, and they are indeed an Alarm Services company. I find it funny, like finding a "Burger King Alarm Services" sign at McDonalds. Personally if I were in charge as HSBC I would have chosen a different Alarm Services company based on the name alone, but that's just me.