Steven Metro appeals from the 46-month sentence of imprisonment imposed by the District Court as a consequence of his guilty plea to one count of conspiracy to violate federal securities laws and one count of insider trading. He contends that the Court wrongly attributed to him illicit financial gains actually attributable to someone with whom he was not acting in concert and to whom he did not provide inside information. Because the District Court's factual findings are insufficient to support the sentence, we will vacate and remand for resentencing.