Several Nifty 500 stocks — the index tracking India's 500 largest listed companies by market capitalization — recorded notable moves at market open today, with pharmaceutical and chemical companies among the top gainers while power transmission and financial services stocks saw declines.

Top Gainers

Neuland Laboratories shares rose over 6% at market open following the company's strong Q1 results. A manufacturer of active pharmaceutical ingredients, Neuland operates in India's API sector, which supplies global drugmakers and has benefited from supply-chain diversification away from China. The stock has gained nearly 40% since the start of the year and over 64% in the past year. It currently trades about 3% below its 52-week high of ₹21,882 and 83% above its 52-week low of ₹11,500. More than 1 lakh shares changed hands in early trade.

Navin Fluorine shares climbed over 6% at market open. One of India's leading fluorochemicals producers, Navin Fluorine serves sectors including pharmaceuticals, agrochemicals, and refrigerants. The stock is up 36% year-to-date and 60% over the past year. It sits just 0.3% below its 52-week high of ₹8,131 and 80% above its 52-week low of ₹4,498.50. Over 5 lakh shares were traded.

Bandhan Bank shares advanced over 3% at market open. The Kolkata-based private lender focuses significantly on microfinance and retail banking. The stock has risen 22% since the beginning of the year and 7% over the past year. It is 25% below its 52-week high of ₹220.76 and 31% above its 52-week low of ₹134.25. Over 56 lakh shares were traded.

KPIT Technologies shares gained over 2% at market open. Despite today's rise, the stock has fallen nearly 46% year-to-date and approximately 48% over the past year, reflecting a broader selloff in Indian mid-cap IT stocks. The automotive software and engineering services provider trades 16% above its 52-week low of ₹543. Over 17 lakh shares were exchanged.

Tenneco Clean Air India shares gained up to 5% at market open. The auto component manufacturer supplies emission control and clean air systems. The stock has risen almost 10% since the start of the year and nearly 13% over the past year. It is 18% below its 52-week high of ₹657 and 26% above its 52-week low of ₹438.05. Over 6 lakh shares were traded.

Top Losers

GE Vernova T&D India shares fell 6% at market open. The company manufactures power transmission and distribution equipment, a segment that has drawn investor interest amid India's grid modernization push. The stock has risen approximately 35% year-to-date and 53% over the past year. It is 31% below its 52-week high of ₹5,650 and 70% above its 52-week low of ₹2,523.20. Over 9 lakh shares were traded.

eClerx Services shares declined nearly 4% at market open. The business process management and data analytics firm has faced pressure alongside the broader IT services sector. The stock has fallen almost 24% since the start of the year and up to 7% over the past year. It trades 36% below its 52-week high of ₹2,497.50 and 39% above its 52-week low of ₹1,320. Over 1 lakh shares changed hands.

Cummins India shares dropped nearly 3% at market open. The manufacturer of diesel and natural gas engines serves commercial vehicle, industrial, and power generation markets. The stock has risen 20% year-to-date and almost 48% over the past year. It is 13% below its 52-week high of ₹6,100 and 50% above its 52-week low of ₹3,572.90. Over 7 lakh shares were traded.