Check out the companies making headlines in early morning trading. Southwest Airlines — The carrier slid 6% premarket after reporting a mixed financial update early Thursday. Southwest said business revenues are continuing to recover, but not yet back to back to pre-pandemic levels, cited higher costs, including raising its jet fuel forecast for the full year to $2.70-2.80 per gallon from an earlier $2.60-2.70. Chipotle Mexican Grill — Shares of the burrito chain fell more than 8% after its latest financial update showed sales fell short of Wall Street expectations. Chipotle reported $2.51 billion in revenue, while analysts polled by…