Shareholders who got in before that last round, that is. Employees who joined in the last few years will likely have underwater options unless Loom internally repriced already-granted options.
Loom is an odd case because the timing of their last round was simply perfect. It was announced in May 2021, which means the terms would've been set in Jan or Feb, when Tiger and other firms were on a rampage and competition to get into rounds was at its height. That last $130m has to have been on very favorable terms, not just the valuation but e.g. no crazy liquidation preference. So, unless Loom's founders made some inexplicably bad deals, I'd expect even recent hires to still make a little money. Nobody should be getting zeroed out.