Are Z shares worth purchasing as part of my company equity program?

Our company allows us to purchase Z shares up to 5K per calendar year with a match up to 5K.

Are Z shares worth purchasing? I just don’t want our company to get acquired and I don’t even get paid out and just funded money for them.

Any thoughts? I’m pretty sure it’s common Z shares that are given. Stock is around $2.5 but we’re in a rapid growth phase right now.