These are the headline-grabbing companies in midday trading.

Nikola — The electric truck maker saw its stock surging more than 16% a day after the company announced on Twitter that its first customer delivery is done and signaled there’s more to come.

Novavax — Vaccine producer Novavax fell 2.3% despite reporting on Wednesday that a two-dose treatmentIts Covid-19 vaccine showed strong immunity against the omicron strain. According to it, the amount of immune responses against omicron were lower than that for the original virus strain. Therefore, the company suggested that booster doses be administered.

JD.com — Shares of JD.com fell about 6.4% after the Chinese social media company Tencent said it will distribute most of its stakeIn the Chinese ecommerce giant, to shareholders in form of $16.4 billion dividend.

Las Vegas Sands, Wynn — Casino stocks with exposure to Macao rose on Thursday after the local government released the results of a review of the gaming industry. StreetAccount reports that the review concluded there ought to be six operators. Wynn’s shares gained 3% and Las Vegas Sands gained 3.4%. Both shares are trading lower than they were mid-September, when Macao revealed the review.

Stitch Fix — Shares of Stitch Fix gained 5.4% after one of its shareholders, Working Capital Advisors, disclosed that it purchased 3.4 million shares in the company, bringing its total holdings to 10.6 million shares.

Crocs — Shares of Crocs dropped more than 14% after the footwear maker announced it would buy privately held rival HeydudePurchase of $2.5 Billion in stock and cash Both companies stated that they expected the deal close during the first quarter in next year.

Tesla — Tesla shares rose more than 5% after CEO Elon Musk announced he’s “almost done”After having sold more than $15 million worth of shares for over a month, he decided to sell his shares. He suggested that he might have had earlier in the week. completed “enough”To reach his goal to sell 10% of his shares, he will need transactions.

Ortho Clinical Diagnostics, Quidel — Shares of the in-vitro diagnostics company climbed more than 6% following news that Ortho will be acquired by QuidelThe company is a provider of diagnostics technology. This cash-and stock deal was valued at approximately $24.68 each share. Quidel shares plunged approximately 17%

Sciplay, Scientific Games — SciPlay, a digital games developer and publisher, saw its shares slide more than 15% a day after Scientific Games, one of its largest shareholders, withdrew its offer to acquire the remaining 19% equity interest in the company. Scientific Games’ shares increased by more than 10 percent.

Mission Produce — The produce company’s shares tumbled more than 8% after it reported a quarterly miss on both earnings and revenue, noting that its results were affected by supply challenges.

 — CNBC’s Hannah Miao, Jesse Pound and Yun Li contributed reporting