Biggest stock movers Thursday: COHR, RRGB, and more

Stock futures were largely unchanged in the premarket hours of Thursday after the S&P 500 and Nasdaq Composite closed at record highs for a second straight session as investors awaited fresh economic data to gauge the health of the U.S. economy.

Here are some of Thursday’s biggest stock movers:

Biggest stock gainers

• Red Robin Gourmet Burgers (NASDAQ:RRGB) +14% – Shares climbed after the company swung to a Q2 net profit of $4M from a year-ago loss and reported a 64% surge in adjusted EBITDA to $22.4M, driven by improved operational efficiencies and margin expansion. The launch of the value-focused Big YUMMM Burger Deal delivered meaningful traffic gains late in the quarter, boosting investor sentiment despite a 5.5% drop in revenue and continued sales challenges. Management maintained its adjusted EBITDA guidance at $60M–$65M for the year but notably cut its full-year revenue outlook to approximately $1.2B from a prior $1.21B–$1.23B, reflecting expectations for a 3%–4% decline in comparable restaurant sales. The company remains focused on executing its First Choice comeback plan, aiming for sustainable growth amid a competitive restaurant landscape.

Biggest stock losers

• Ibotta (NYSE:IBTA) -31% – Shares plunged after Q2 results missed expectations and Q3 sales guidance came in well below forecasts. Adjusted EPS fell 28% Y/Y to $0.49, missing by $0.07, while adjusted EBITDA dropped 29% to $17.9M, with margin contracting 800 bps to 21%. Net sales declined 2.2% to $86M, $4.5M short of estimates. Direct-to-consumer redemptions fell 23% and redeemers dropped 11%, while third-party publisher redemptions rose 12% and redeemers jumped 32%. For Q3, revenue is expected at $79M–$85M (vs. $101.8M est.) and adjusted EBITDA at $9.5M–$13.5M, with margins down sharply 35% from the prior quarter.
• Coherent (NYSE:COHR) -18% – Shares dropped as soft FY2026 Q1 revenue guidance outweighed a strong FQ4. The company expects FQ1 revenue of $1.46B–$1.60B (midpoint $1.53B vs. $1.55B consensus) and non-GAAP EPS of $0.93–$1.13 (midpoint in line with estimates). Coherent also announced the $400M sale of its Aerospace and Defense business to Advent, with proceeds earmarked for debt reduction and expected to be immediately accretive to EPS. The unit, with ~550 employees across 10 sites, will operate under a new name post-closing in Q3 2025.