sorry did not see ur 11:41 post...form 4 vs 144.
Forms 3, 4, and 5
Corporate insiders must file Forms 3, 4, and 5. The SEC defines a corporate insider as "a company's officers and directors, and any beneficial owners of more than ten percent of a class of the company's equity securities registered under Section 12 of the Securities Exchange Act of 1934." These forms are meant to reveal more information about the securities that company insiders own.
Form 144
Form 144 is required when corporate insiders want to dispose of company stock. Form 144 is a notice of the intent to sell restricted stock, typically acquired by insiders or affiliates in a transaction not involving a public offering. The stock is restricted because it must meet certain conditions before becoming transferable. The transaction, or at least part of it, is made within 90 days of filing. Form 144 is required when the amount sold during any three-month period exceeds 5,000 shares or $50,000.13