By Tom Sims and Alexander Hübner FRANKFURT (Reuters) -German insurer and asset manager Allianz on Thursday said it would set aside 3.7 billion euros ($4.20 billion) to deal with investigations and lawsuits resulting from the collapse of a multi-billion-euro set of investment funds. The provision resulted in a net loss attributable to shareholders of 292 million euros in the fourth quarter, the company said. Analysts had expected a profit. Allianz said that the outcome of various investigations and lawsuits “cannot be reliably estimated” and that it “expects to incur additional expenses before …