Shanthi Gears shares hit their 20% upper circuit at Rs 464.25 on the NSE after parent Tube Investments raised its stake through a block deal.

That’s the maximum the stock is allowed to move in a single session, and it got there fast on Friday, August 21.

The buying pressure came from news that Tube Investments of India, which already owned a majority stake in the gears maker, had picked up more shares through the stock exchange.

Tube Investments acquired 20,64,713 equity shares of Shanthi Gears for around Rs 77.49 crore in a block deal. That single purchase took its holding in the company up from 70.46% to 73.16%.

The board of Tube Investments approved the move on the same day, and the company disclosed it isn’t a related party transaction.

Shanthi Gears makes gears, gearboxes, geared motors and gear assemblies, and also handles refurbishment and repair work for gearboxes.

The business hasn’t had the smoothest run lately. Within Tube Investments’ recent quarterly numbers, the gears and gear products segment showed revenue of Rs 115.13 crore, down from Rs 134.70 crore a year earlier.

For the full year FY26, Shanthi Gears reported a turnover of Rs 518.72 crore, lower than the Rs 604.62 crore it clocked in FY25.

Even after Friday’s jump, the stock is still well off its highs. It touched a 52 week low of Rs 384 just a few days ago, on August 18, and remains far below its 52 week high of Rs 598.90 from a year back.

As of 12:40 pm, Shanthi Gears shares were trading at Rs 464.25 on the NSE, up 19.99% for the day. The stock has now turned positive for the past month, up over 10%, though it is still down slightly on a year to date basis.

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