It's a registration to sell $500 million in "DEBT SECURITIES, COMMON STOCK, PREFERRED STOCK and WARRANTS" as it says in the title of the registration. This isn't for employee stock options.
Here's the first two paragraphs:
"We will provide specific terms of the securities offered to the public in supplements to this prospectus.
"This prospectus may be used to offer and sell securities only if accompanied by a prospectus supplement. The prospectus supplement is more specific than this prospectus and to the extent information differs from this prospectus, you should rely on the information in the prospectus supplement. You should read this prospectus and any supplement very carefully before you invest."
A little further digging reveals:
"Our growth has been achieved, in part, by acquisitions. As part of our overall business plan, we may from time to time consider strategic acquisitions of other companies or investments in joint ventures that we believe can benefit from our operations, management and access to capital or enhance our relationships with existing or potential new customers. Our ability to grow by acquisition is dependent upon, and may be limited by, the availability of suitable acquisition candidates and capital."
Management will not tell you in advance of any acuisition in the works, as that would be illegal. They have to make the information available to all at once.
An offering of this size would necessarily be dilutive. If there are more shares outstanding, then each share is worth less. Granted, there would be more cash in the coffers, but think about earnings per share, cash per share, etc.