That's pretty dumb, IMHO. Even if someone owns $50k in stock in a company, that's small beans compared to the total value of all shares outstanding. Yeah, I'm going to be a bit more concerned about the company's financial well being, but to go so far as giving them preferential treatment on the job? Get real.
Making someone take a capital loss on some stock because they own a couple hundred shares of a company is just plain dumb. If there's no way for them to directly monitor that (very doubtful...it is none of their business frankly), I'd just hold onto the shares until they recover, then sell them. Unless you own enough to be subject to having to report any sale to the SEC what you hold in a personal portfolio that was part of an ESOP or other similar program is your business alone.