Check out the companies making headlines in extended trading. BOK Financial — The Oklahoma bank's shares slid 3% after earnings per share for the first quarter missed Wall Street expectations. BOK earned $1.86 per share, while the consensus estimate of analysts polled by FactSet came in at $1.99 a share. The firm also posted a net interest margin of 2.78%, under the Street's projection of 2.84%. Zions Bancorporation — The Utah-based bank's shares dropped nearly 6% following weaker-than-expected earnings per share. Zions recorded $1.13 in EPS for the first quarter, while analysts polled by LSEG penciled in $1.18 per share. Calix — The technology services stock jumped 14% on stronger-than-expected earnings for the first quarter and upbeat current-quarter guidance. Calix earned 19 cents a share, excluding items, on $220.2 million in revenue, while analysts surveyed by FactSet anticipated 13 cents a share and $207.1 million, respectively. MongoDB — Shares retreated 2% after the developer data platform said Srdjan Tanjga was resigning as interim CFO, effective May 8. MongoDB said its expects to announce a new finance chief in the next seven to 10 days. Western Alliance Bancorp — Shares of the Arizona-based bank fell 2%. Despite the company posting a slight beat on earnings per share for the first quarter, its net interest income and net interest margin came in lower than analysts anticipated, per FactSet. Medpace Holdings – Shares of the clinical research organization slid 6%. Net new business awards in the first quarter came in at $500 million, reflecting a decline of nearly 19% from the year-ago period. — CNBC's Darla Mercado contributed reporting Get Your Ticket to Pro LIVE Join us at the New York Stock Exchange! Uncertain markets? Gain an edge with CNBC Pro LIVE , an exclusive, inaugural event at the historic New York Stock Exchange. In today's dynamic financial landscape, access to expert insights is paramount. As a CNBC Pro subscriber, we invite you to join us for our first exclusive, in-person CNBC Pro LIVE event at the iconic NYSE on Thursday, June 12. Join interactive Pro clinics led by our Pros Carter Worth, Dan Niles and Dan Ives, with a special edition of Pro Talks with Tom Lee. You'll also get the opportunity to network with CNBC experts, talent and other Pro subscribers during an exciting cocktail hour on the legendary trading floor. Tickets are limited!