Top Gainers Today 18-Sep-2026: Small-caps, Adani jump

Introduction

Nifty 50 closed at 23,346.40 (+0.33%) while the Sensex ended nearly flat at 74,294.96 (-0.03%) on 18 Sep 2026. Market breadth stayed supportive with 31 of 38 sectors advancing, and the strongest push came from commodities and metals, with the S&P BSE Commodities index up 3.73% and Nifty Metal up 1.51%. Mid and small caps outperformed, with sharp single-stock moves led by gas utilities, infrastructure plays and momentum-driven small-cap breakouts.

Large Cap Top Gainers

Siemens Energy India Ltd (+3.98%) Siemens Energy India advanced as investors rotated into capital goods and industrial names during a broader risk-on session in the wider market. The move came alongside steady participation, with 7.63 lakh shares traded, suggesting follow-through buying rather than a thin-volume spike.

Lenskart Solutions Ltd (+3.94%) Lenskart climbed on heavy activity, with volume at 2.60 crore shares, pointing to aggressive accumulation through the session. The stock also traded close to its 52-week high of Rs 725, which typically attracts momentum buyers when price approaches breakout levels.

Adani Green Energy Ltd (+3.75%) Adani Green rose in tandem with other Adani group counters that dominated the gainers list, which investors often read as a group-wide re-rating or a coordinated risk-on move within the pack. Trading volume of 27.39 lakh shares reinforced the strength of the up move.

Adani Ports & Special Economic Zone Ltd (+3.72%) Adani Ports gained as the Adani-led rally extended to infrastructure plays, pushing the stock closer to its 52-week high zone of Rs 1,891.80. The 42.53 lakh shares traded indicated broad participation, helping sustain the move into the close.

One 97 Communications Ltd (+3.58%) One 97 Communications moved higher as it traded near its 52-week high of Rs 1,856.50, a level that often triggers technical buying when approached after sustained uptrends. Volume of 48.11 lakh shares supported the breakout-style move.

Mid Cap Top Gainers

Adani Total Gas Ltd (+12.58%) Adani Total Gas surged as the Adani group emerged as a clear pocket of leadership on the day, with multiple group stocks featuring among the top gainers across market caps. The rally was backed by very high volume at 4.13 crore shares, which typically signals institutional-sized participation and a strong follow-through move.

Poonawalla Fincorp Ltd (+10.99%) Poonawalla Fincorp jumped as financials held up well on a day when Bank Nifty rose 0.54% and Nifty Finance gained 0.76%, keeping flows supportive for lenders and NBFCs. The stock saw 75.83 lakh shares traded, indicating the price move was driven by broad participation.

Welspun Corp Ltd (+8.01%) Welspun Corp rallied alongside the commodities and metals upmove, with the S&P BSE Commodities index up 3.73% and Nifty Metal higher by 1.51%, which typically improves near-term pricing expectations for metal-linked counters. The stock also traded closer to its 52-week high band (Rs 2,785.95), attracting momentum buying on 48.65 lakh shares.

JSW Infrastructure Ltd (+6.85%) JSW Infrastructure rose as investors added exposure to ports and logistics-linked themes, which also showed up in gains in large-cap port names. The stock ended just below its 52-week high of Rs 356.40, with 2.62 crore shares traded, a combination that often supports a breakout attempt.

Physicswallah Ltd (+6.84%) Physicswallah advanced on unusually active trading, with volume at 2.15 crore shares, highlighting strong demand through the session. The move came amid broader mid and small-cap outperformance, which often channels flows into higher-beta consumer internet and education counters.

Small Cap Top Gainers

Asian Star Company Ltd (+20.00%) Asian Star hit the 20% upper circuit after breaking out to a fresh 52-week high of Rs 827.15, which triggered momentum buying in a thinly traded small-cap. The stock’s move was accompanied by a sharp price gap-up type session, consistent with breakout-driven participation.

Timex Group India Ltd (+17.06%) Timex Group India jumped as it traded close to its 52-week high of Rs 729, a setup that typically draws technical traders when a stock approaches a fresh-high zone. The move was backed by high volume of 70.11 lakh shares, reinforcing that the rally had strong participation.

Sambhv Steel Tubes Ltd (+14.68%) Sambhv Steel Tubes rallied after the company issued a preferential issue clarification to exchanges, including details of its proposed issue of 8,695,400 fully convertible warrants at Rs 115 each and an explanation around VWAP rounding, with the issue price unchanged. The clarification reduced regulatory and pricing uncertainty around the fund-raise, supporting a strong risk-on reaction in the stock alongside heavy volume of 2.94 crore shares.

Avalon Technologies Ltd (+13.66%) Avalon Technologies surged as it pushed toward its 52-week high zone (Rs 2,620), with the session characterised by strong technical momentum and follow-through buying. Volume of 44.51 lakh shares added conviction to the move, aligning with a broader small-cap leadership day.

Clay Craft India Ltd (+12.94%) Clay Craft India climbed sharply in a session where small caps outperformed, and the stock rebounded further from its 52-week low zone of Rs 144.50. With volume at 1.16 lakh shares, the move also reflected how limited liquidity in small caps can amplify price swings when demand rises.

Market Overview

Indian equities finished mixed on 18 Sep 2026, with Nifty 50 up 0.33% at 23,346.40 while the Sensex slipped 0.03% to 74,294.96. Broader markets outperformed, with the BSE MIDCAP 150 index up 1.3% and the BSE Smallcap 250 index up 1.31%, highlighting stronger risk appetite away from heavyweight index stocks.

Sectorally, leadership came from commodities and metals as the S&P BSE Commodities index gained 3.73% and Nifty Metal rose 1.51%. Financials also held firm with Bank Nifty up 0.54% and Nifty Finance up 0.76%, while IT was the main drag with Nifty IT down 1.03%.

Market breadth remained constructive with 31 of 38 sectors advancing, consistent with the day’s strong showing in mid and small caps where several stocks moved on breakout setups, volume spikes, and stock-specific disclosures.

Explore More Market Movers

Readers can explore the complete list of market movers here:

https://www.multibagg.ai/market-movers/top-gainers