Check out the companies making headlines after the bell : International Business Machines — The technology giant slipped 6% after IBM failed to raise its full-year guidance after posting an earnings beat. IBM reported first-quarter earnings of $1.91 per share, excluding items, beating forecasts of $1.81, according to LSEG. The company’s $15.92 billion in revenue also came in above the expected $15.62 billion. Tesla — Shares popped 4% after the electric vehicle maker posted first-quarter adjusted earnings of 41 cents per share, beating the 37 cents analysts polled by LSEG had expected. However, Tesla’s $22.39 billion in revenue came in below the $22.64 billion consensus estimate. CSX — The transportation stock popped 6% after posting first-quarter earnings of 43 cents per share, beating the expected 39 cents analysts surveyed by FactSet had penciled in. However, CSX’s $3.48 billion revenue came in slightly below the forecast $3.49 billion. Texas Instruments — The semiconductor stock soared 10% after it forecast that its current-quarter earnings would come in the range of $1.77 to $2.05 per share, versus the $1.57 consensus, according to LSEG. Similarly, it sees its revenue coming in between $5 billion to $5.4 billion, while analysts were anticipating $4.86 billion. Texas Instruments also posted a beat on both the top and bottom lines for its first quarter. Southwest Airlines — Shares …
