"Here, the shareholders' claims fail because their allegations do not adequately tie Stratasys's knowledge of the product quality issues or their financial repercussions to the timing of the statements," the court states. "The shareholders' allegations about Stratasys's knowledge of the 5G printers' issues, from confidential witness accounts, do not provide particular details about when Stratasys knew of these issues. The shareholders argue the district court erred in considering their confidential witness accounts when evaluating scienter because those accounts were meant to demonstrate only that the statements were materially false. However, adequately pled scienter must demonstrate that a defendant knew a statement was false at the moment it was made. Without tying the timing of the knowledge to the allegedly misleading statements, the shareholders do not plead facts sufficient to support a strong inference of scienter."