"Form D is a filing with the Securities and Exchange Commission (SEC) that allows companies under a Regulation D exemption or Section 4(6) exemption to offer stock to finance their businesses without going through the IPO process and selling stock to the public."
Someone has given sino some money in exchange for stock, but the company or investor doesn't want us to know who it is.
"The only thing necessary for evil to succeed is for good men to do nothing"