● GE Aerospace (GE) closed at $318.24 on Monday, down from $327.09, as the S&P 500 lost 59.72 points.
● Amprius Technologies (AMPX) closed at $9.60 on Monday, down about 1.5% from $9.75, after touching $11.23 early in the session.
Voyager Technologies (NYSE:VOYG) was among the gainers in US markets on Monday, September 28, 2026, closing the session up 5.84% at $33.18. The company operates in space and defense technology, an area that has drawn heightened investor interest.
On Monday, September 28, 2026, Intercont (NASDAQ:NCT), a penny stock, tumbled 43.57% to finish at $2.50. It is a small-capitalization, low-float company whose shares have traded with pronounced volatility in September.
ModineManufacturing(NYSE:MOD) closed down 11.63% at $175.04 on Monday, September 28, 2026. September 28 was the record date for the spin-off of its Performance Technologies business, with the closing expected on October 1.
One set ofMargincomments at aSell-Sidewebcast sent ModineManufacturing(NYSE:MOD) plunging on Monday, September 28, and knocked Vertiv (NYSE:VRT), EMCOR (NYSE:EME) and Comfort Systems (NYSE:FIX) lower in a test of the AI data-center boom.
SpaceX (NASDAQ:SPCX)'s giant Starship rocket reached orbit for the first time, yet the company's shares slipped slightly on Monday, September 28, as a broad selloff and multi-year-high bond yields outweighed a landmark engineering moment.
● Primech Holdings (PMEC) traded down by roughly a sixth during Monday's session, according to an intraday movers list.
● Modine fell 11.63% to $175.04 on Monday, while Vertiv, a larger data-center cooling supplier, closed down 3.65% at $244.04.
● ModineManufacturingclosed at $175.04 on Monday, down 11.63% from $198.07, one of the sharpest declines among mid-sized US stocks.