Top gainers and losers, Dec 18: Sun Pharma falls 3%, IndiGo up 3%, TCS jumps 2%; check full list

However, the foreign institutional investors (FIIs) purchased shares worth ₹1,171.71 crore, while the domestic institutional investors (DIIs) bought equities worth ₹768.94 crore on a net basis, according to exchange data.

The SENSEX dropped 77.84 points or 0.09% to end flat at 84,481.81. Similarly, NIFTY closed lower by 3 points or 0.01% at 25,815.55.

NIFTY50 top gainers and losers

The 50-share NIFTY index was weighed down by selling in the shares of Sun Pharmaceutical Industries, which closed 2.62% lower, as the US FDA inspected the company’s Baska facility from September 8, 2025, to September 19.

The US FDA subsequently determined that the inspection classification status of this facility was Official Action Indicated (OAI).

It was followed by Tata Steel (-1.40%), Power Grid Corporation of India (-1.23%), Asian Paints (-0.98%) and Tata Consumer Products (-0.92%), which were among the top losers of the day.

On the other hand, the top gainers pack was led by InterGlobe Aviation, which surged to close 2.90% higher.

IndiGo shares rallied after chief executive Pieter Elbers told employees on Thursday that the airline had stabilised operations following a period of disruption, adding that the worst was over and that India’s largest airline was now focused on resilience, a root-cause review, and rebuilding.

Tata Consultancy Services (1.97%), Max Healthcare Institute (1.64%), Tech Mahindra (1.62%) and Infosys (1.57%) trailed behind IndiGo.

Shares of Max Healthcare Institute surged as much as 2.89% to an intra-day high of ₹1,060.90 per unit on the National Stock Exchange (NSE) on Thursday, after its board of directors approved the proposal to enter into a share purchase agreement (SPA) for the acquisition of a 100% equity stake in Yerawada Properties Private Limited (YPPL), Pune.

Its board also approved setting up an approximately 450-bed super-specialty hospital on the land owned by YPPL, for an aggregate of up to ₹1,020 crore.

NIFTY Midcap 100 top gainers and losers

NSE’s midcap gauge, the NIFTY Midcap 100, advanced by 203.30 points, or 0.34%, to 59,592.15 on December 18.

The index was supported by buying in the shares of HDFC Asset Management Company, which ended 7.23% higher, as asset management companies and broking firms traded in the green after SEBI on Wednesday announced several tweaks to mutual fund regulations around expense ratios and exit loads, seeking to adopt a "balanced" stance.

The other top winners included PB Fintech (3.97%), Motilal Oswal Financial Services (3.74%), Mahindra & Mahindra Financial Services (3.64%) and Ashok Leyland (3.20%).

On the flip side, the top laggards included Hitachi Energy India (-5.25%), Cummins India (-3.03%), Steel Authority of India (-2.50%), Alkem Laboratories (2.18%) and Tata Communications (-1.95%).

NIFTY Smallcap 100 top gainers and losers

The NIFTY Smallcap 100 ended at 17,160.20, up by 21.65 points or 0.13%.

It was driven by gains in HBL Engineering (7.23%), Reliance Power (5.91%), Hindustan Copper (4.64%), Kfin Technologies (3.75%) and Radico Khaitan (2.81%), which were among the top gainers.

On the contrary, Ola Electric Mobility lost 4.38% after its founder-promoter Bhavish Aggarwal sold another 4.2 crore shares through open market transactions worth ₹142 crore.

This comes a day after Aggarwal undertook a one-time, limited monetisation of a small portion of his personal stake to fully repay a promoter-level loan amounting to ₹260 crore.

Kalpataru Projects International (-3.35%), Mangalore Refinery and Petrochemicals (-2.99%), Aster DM Healthcare (-2.72%) and Afcons Infrastructure (-2.22%) were among the other top losers.