 Oshkosh Corp. shares OSK, 1.16 slid 5.4 in premarket trade Friday, after the maker of trucks and emergency vehicles warned that supply-chain and logistics disruptions were hurting its ability to make and ship units, as it lowered guidance for its fiscal fourth quarter. We implemented multiple price increases in our non-Defense segments over the past six to nine months to combat unprecedented raw material inflation and freight cost escalation, Chief Executive John C. 