Stock futures are trading lower this Tuesday morning, but several companies are already making noise in pre-market action. Here's what's catching investor attention today.

The biggest mover is ZIM Integrated Shipping Services Ltd. (ZIM), which jumped 11.7% to $22.20 in after-hours trading Monday. The shipping company announced it has received acquisition proposals from multiple parties looking to buy all outstanding shares, and management is currently evaluating the offers. When a company gets multiple suitors knocking at the door, investors tend to pay attention.

Parsons Corp. (PSN) also had a strong showing, climbing 6.2% to $66.00 in extended trading after announcing it secured a contract under the Missile Defense Agency's SHIELD program. Government defense contracts can be lucrative and long-term, which explains the market's enthusiasm.

On the earnings front, analysts expect Limoneira Co. (LMNR) to report a quarterly loss of 10 cents per share on revenue of $35.25 million when it releases results after the closing bell today, according to data from Benzinga Pro. The agricultural company's shares gained 0.9% to $14.53 in after-hours trading as investors positioned ahead of the announcement.

Good Times Restaurants Inc. (GTIM) is also scheduled to report fourth-quarter earnings after the market closes today. Shares edged up 0.8% to $1.26 in the after-hours session as traders awaited the results.

Meanwhile, XMax Inc. (XWIN) moved in the opposite direction, dropping 4.5% to $5.80 after filing for a public offering of 1.1875 million shares priced at $4.21 per share. Stock offerings tend to dilute existing shareholders, which typically pressures the share price lower.