Help with pulling values

Hello everyone! I had expose an Ultrafine extreme 400 iso neg at 100 iso. The conditions where normal, normal contrast, sunny day. I can't manage to find how much to pull it, on The Massive Dev Chart says only for 400 iso : "Ultrafine Xtreme 400 HC-110 dilution F 400 16 min"
Any experience or ideas?

Thank you!

You have over-exposed the film by 2 stops. This is well within the latitude of the film. Develop it normally. The negatives will be denser than normal but just print through. Pulling the film will decrease contrast and require a higher grade of paper or filter. The prints will be fine. Many photographers typically over-expose by 1 stop for better gradation.

By the way a film has only one ISO speed and that is the box speed given by the manufacturer. Anything else is an exposure index EI.

http://www.guidetofilmphotography.com/exposure-index.html

Thank you! Developed normal, got very nice negs!