YSS ▲ +0.8% - York Space Systems, Inc. $YSS - York Space Systems to Present at Jefferies Global Industrials Conference York Space Systems gained 0.8% today following news that the company will present at the Jefferies Global Industrials Conference. The stock's modest rise likely reflects investor interest in hearing directly from management about the company's business outlook and strategy. Conference presentations can attract institutional investor attention and generate positive sentiment around a company's prospects. 27-AUG-2026 06:21 PM ET