Stock futures were falling Tuesday as the tech-led rally continued to lose momentum and investors monitored developments in the Iran war.

These stocks were making moves:

Home Depot rose 1.2% after the home-improvement retailer posted first-quarter earnings that beat analysts' estimates and revenue rose 4.8% to $41.8 billion, with comparable sales up 0.6%. Home Depot also reiterated guidance.

ServiceNow gained 4% and was set to build on its 9% jump in the previous session after Bank of America reinstated coverage of the software company with a Buy rating and a $130 price target.

Agilysys jumped more than 15% after the hospitality software provider beat earnings and revenue estimates in its fiscal fourth quarter. It was the company's 17th consecutive of record revenue, driven by subscription sales growth of 24%.

Alphabet rose 0.5% to $398.88 and edged closer to the $5 trillion market cap mark. The Google parent closed with a market capitalization of $4.79 trillion Monday, just over 4% off the milestone.

Akamai Technologies fell 4% after the cloud computing company announced a $2.6 billion convertible notes offering. The company said the proceeds would be used to fund the "rapid buildout" of its cloud infrastructure services business.

Recent tech winners were under pressure as memory chip player Sandisk fell 3% and optical-networking companies Coherent and Lumentum were both down 2% after sharp falls Monday.