Biggest stock movers Tuesday: Pot stocks, BBAI, and more

Stock futures inched up in the premarket hours of Tuesday as investors awaited July’s Consumer Price Index (CPI) report due later today, a key indicator that could shape the Federal Reserve’s next interest rate decision.

Here are some of Tuesday’s biggest stock movers:

Biggest stock gainers

• AST SpaceMobile (NASDAQ:ASTS) +14% – Shares surged despite missing Q2 earnings, as investors reacted positively to several key updates from the company’s conference call. AST announced plans to deploy intermittent service in the United States by the end of 2025, with expansion to the UK, Japan, and Canada scheduled for the first quarter of 2026. The company, which is building a space-based cellular broadband network, also confirmed its goal to launch between 45 and 60 satellites by next year, with orbital launches planned every one to two months on average. Furthermore, CEO Abel Avellan noted that revenue from its U.S. government business, for which it has already signed eight contracts, is expected to ramp up significantly in the coming quarters.
• Tilray Brands (NASDAQ:TLRY) +13% – Cannabis producer stocks surged in premarket trading on Tuesday, extending their rally from Monday after President Donald Trump publicly stated that his administration is “looking at reclassification” of marijuana as a less dangerous drug. Trump mentioned that a determination on its federal classification would be made “over the next few weeks,” signaling potential reclassification from Schedule I to Schedule III, which would lower the drug’s legal restrictions and possibly encourage more research and investment in the sector. Key gainers include Canopy Growth (NASDAQ:CGC) +17%, Aurora Cannabis (NASDAQ:ACB) +7%, SNDL (NASDAQ:SNDL) +4%, GrowGeneration (NASDAQ:GRWG) +6%, and Organigram (NASDAQ:OGI) +3%.

Biggest stock losers

• PubMatic’s (NASDAQ:PUBM) -30% – Shares declined as the disappointing Q3 revenue outlook overshadowed upbeat Q2 results and strong adjusted EBITDA, which exceeded estimates by nearly 30%. Q3 revenue is expected to be between $61M and $66M, about 10.8% below analyst estimates, along with an EBITDA midpoint of $8.5M, significantly lower than expected. Additionally, issues with a major legacy demand-side platform (DSP) partner, which reduced available inventory and pressured ad spending from key advertisers, also weighed on the stock. Although the CEO emphasized strong growth in connected TV (CTV) and ongoing AI-driven platform innovations, the market reacted negatively to the softer outlook and operational headwinds, causing the shares to drop sharply.
• BigBear.ai Holdings (NYSE:BBAI) -28% – Shares plunged after Q2 2025 results and guidance badly missed estimates. The company reported a much wider loss per share of $0.71, compared to the consensus estimate of a $0.06 loss. Q2 revenue of $32.5M not only fell short of forecasts but also fell 18% Y/Y. BBAI also cut its full-year revenue outlook to $125M–$140M from $160M–$180M vs. the consensus of $155.82M, citing challenges in federal government contracting.