U.S. markets ended in the red on Wednesday after strong labor data sparked investor concerns about further rate hikes by the Federal Reserve. There were 1.8 job openings for every unemployed person in April, up from 1.7 in the previous month, according to a Reuters report. Market participants are still watching out for the vote on the crucial debt ceiling bill in Congress on Wednesday night, at the time of writing. Meanwhile, the following are the five stocks that are drawing investor attention:

1. Tesla Inc (NASDAQ:TSLA): Shares of Tesla closed 1.38% higher on Wednesday. The EV maker plans to give an early glimpse of its revamped Model 3 sedan as part of Elon Musk's first visit to the company's Shanghai factory in years, reported Bloomberg citing people familiar with the matter. The CEO is visiting the country for the first time in about three years.

2. C3.ai Inc (NYSE:AI): Shares of the company closed 8.96% lower and lost another 22.22% in extended trading. C3.ai announced fourth-quarter revenue of $72.4 million, up from $72.3 million in the same time period last year. The company expects first-quarter revenue to come in the range of $70 million to $72.5 million, which came in below Wall Street expectations, according to a CNBC report.

3. Salesforce Inc (NYSE:CRM): Shares of the company closed 2.06% higher but lost 5.79% in extended trading. The company reported a revenue of $8.25 billion that beat an estimate of $8.18 billion. Salesforce said it repurchased $2.1 billion of its stock in the first quarter.

4. Crowdstrike Holdings Inc (NASDAQ:CRWD): Shares of the company closed 0.97% higher but lost 11.7% in extended trading. The company reported first-quarter revenue of $692.58 million which beat an estimate of $677.37 million. However, Crowdstrike's 42% year-over-year revenue growth was slower than the 61% growth in the year-ago quarter, according to a CNBC report.

5. Okta Inc (NASDAQ:OKTA): Shares of the company closed 0.88% higher but lost 16.19% in extended trading. Okta's total revenue stood at $518 million, registering an increase of 25% year-over-year. However, GAAP operating loss stood at $160 million.