The Indian stock market on January 12, 2026, is set to observe heightened activity around several prominent companies due to recent impactful developments. ITC, a significant player in the consumer goods and tobacco sector, is under close watch following a substantial increase in cigarette excise duties, effective January 1, 2026. This regulatory change has prompted multiple brokerage downgrades and a noticeable dip in ITC's stock value, making its performance a key indicator for investors today. Public sector power giant NTPC is also a focal point, driven by its strategic initiatives in the energy sector. The company has committed a substantial Rs 10,000 crore investment towards a coal-to-synthetic natural gas (SNG) project in Chhattisgarh, signaling its diversification efforts. Furthermore, NTPC Green Energy has invited bids for a 6 MW floating solar project, with today being the last date for submissions, highlighting its renewable energy ambitions. Additionally, NTPC Ltd, in partnership with Mahagenco, recently formalized an agreement to acquire the 1350 MW Sinnar Thermal Plant, bolstering its generation capacity. Automotive major Mahindra & Mahindra (M&M) is positioned for investor interest, buoyed by strong growth projections for 2026. These projections are supported by favorable GST reforms, the introduction of new electric vehicle (EV) models, and robust sales performance in December 2025. While there was news of price adjustments for one of its SUV models in Australia, the overall domestic growth trajectory keeps M&M firmly on the radar of market participants. Mining conglomerate Vedanta is another key stock, having achieved a significant corporate milestone with the National Company Law Tribunal (NCLT) approving its power business demerger scheme on January 9-10, 2026. This major restructuring aims to unlock shareholder value by spinning off four businesses into separate listed entities. The tragic passing of Agnivesh Agarwal, son of Chairman Anil Agarwal, also presents a significant leadership discussion point for the group. Lastly, Lemon Tree Hotels is attracting attention due to a major strategic reorganization. The company announced a comprehensive scheme of arrangement involving a substantial investment of up to Rs 960 crore by global private equity firm Warburg Pincus in its subsidiary Fleur Hotels. This restructuring aims to transform Lemon Tree into an asset-light hotel management and franchising business, with Fleur emerging as a dedicated hotel ownership and development platform slated for a separate listing. These diverse corporate actions across these companies make them essential for investors to monitor on January 12, 2026.