This form is required to be filed annually for those insiders who have had exempt transactions and had not reported them previously on a Form 4. It must be filed within 45 days after the close of the issuer's fiscal year to disclose transactions exempt from prior reporting, as well as transactions that should have been reported previously, but were not. A Form 5 is not necessary if there have not been any transactions to report
It meant Rip made symbolic purchases of around 10 shares of IDCC stock on the last day of each month at open market price pursuant to company's ESPP. basically nonevent.