Key TakeawaysUnited Parcel Service on Tuesday released first-quarter results that beat adjusted profit estimates but fell short of revenue expectations.The shipping giant affirmed its full-year guidance, projecting revenue of $92.0 billion to $94.5 billion and an adjusted operating margin of 10.0% to 10.6%.UPS and other shipping companies like FedEx have had to adjust as shipping demand and revenue that hit record highs during the pandemic have fallen in recent quarters. United Parcel Service (UPS) on Tuesd ...