Hi Gill!

Thanks for the reply. The plant mostly lives inside and I expose to sunlight approx 6 hours daily. I've thoroughly checked for snails, and I can honestly say there is no culprit in sight. Maybe I am over watering now that it's cold. I've opted for growing light instead of sunlight as it's in the 30s (degrees Fahrenheit) here. It was so healthy a week ago.

greenclaws thought you have a Sempervivum but I think its an Aeonium. Perhaps Aeonium 'Kiwi' or something close to that. The pics of 'Kiwi' I found had a bit more red.

Could the leaf damage be caused by edema?

Maybe edema, but maybe insect damage. Do check carefully everywhere (under leaves, on stems) for a small caterpillar, especially if the damage continues. I agree with Poly above, it's aeonium kiwi, grows more actively in the winter and rests in the hot summer weather. You could be overwatering as the soil looks dark (wet?). Be sure you have the plant in a pot with a hole and a fast draining mix (preferably commercial cactus and succulent mix, best mixed 50/50 with perlite from your nursery).

Ooh, sorry If I got the ID wrong, didn’t mean too mislead anyone. Didn’t realise aeoniums had the toothed leaf edges, sorry guys and gals!

Gill

I also think it may be damage cause by insects or pests chewing. Oedema is usually darker - I get it on my A. Kiwi. Little black spots/pimples. Sometimes there are bigger spots, but they are not indented as shown on OP's plant:

I believe you are right Rina, the lesions look too big.

Looks like snail or slug damage to me also. Have you been out to check it over on a rainy night? That's when you will find them.