Its shares rose 37.5%, beating the wider market, and the discount to net asset value has narrowed sharply. Metir PLC (AIM:MET) has signed a deal to bring its rapid water toxicity testing tech to some of Britain's biggest water companies. Seraphim Space Investment Trust PLC (LSE:SSIT) has made its first investments from the £137 million it raised in May, backing Pixxel and Zeno Power. Bradda Head Lithium Ltd (AIM:BHL) has struck a deal letting a solar developer build on part of its Pennsylvania lease, while it keeps its lithium rights below ground. The company says the setup could even power a future lithium extraction pilot plant.