Biggest stock movers Thursday: COHR, RRGB, and more

[Close-up of woman trading stock online on mobile phone]
Luis Alvarez

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 [https://seekingalpha.com/symbol/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 [https://seekingalpha.com/symbol/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 [https://seekingalpha.com/symbol/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.

MORE ON RELATED STOCKS:

* Ibotta, Inc. (IBTA) Q2 2025 Earnings Call Transcript [https://seekingalpha.com/article/4813438-ibotta-inc-ibta-q2-2025-earnings-call-transcript]
* Coherent Corp. (COHR) Q4 2025 Earnings Call Transcript [https://seekingalpha.com/article/4813400-coherent-corp-cohr-q2-2025-earnings-call-transcript]
* Red Robin Gourmet Burgers, Inc. (RRGB) Q2 2025 Earnings Call Transcript [https://seekingalpha.com/article/4813346-red-robin-gourmet-burgers-inc-rrgb-q2-2025-earnings-call-transcript]
* Ibotta outlines 17% Q3 revenue decline guidance amid strategic transformation and client delays [https://seekingalpha.com/news/4485110-ibotta-outlines-17-percent-q3-revenue-decline-guidance-amid-strategic-transformation-and]
* Red Robin outlines $1.2B revenue target and pivots to data-driven marketing as traffic declines 3%-4% [https://seekingalpha.com/news/4485086-red-robin-outlines-1_2b-revenue-target-and-pivots-to-data-driven-marketing-as-traffic]