Why These Defense Stocks Are Declining This Week

3. Momentus Inc. (NASDAQ:MNTS)

Weekly Decline: -12.50%

Momentus Inc. (NASDAQ:MNTS) is a commercial space company that offers satellite buses and in-space infrastructure services, including hosted payloads, in-space transportation, and other in-orbit services. It is also working on several space-related defense contracts.

The stock has had a continuous slide in 2025, having lost 78% of its value year-to-date. The company has been under pressure after receiving several delisting warnings and deficiency notices over the last few months. It is among the defense stocks that are declining this week, with a 12.50% dip over the period.

However, Momentus Inc. (NASDAQ:MNTS) shares gained toward the end of the week after the company announced a strategic partnership with Solstar Space for on-demand communication for space systems. The stock closed at $1.75 per share on Friday, March 14, up 4.16% from the prior day.