KSB Ltd: Revenue Up 19%, Margins Under Pressure

KSB KSB Limited (NSE : KSB) is a Pune-based manufacturer of pumps, valves and fluid-management systems serving power generation, oil and gas, water and process industries. Part of the German KSB Group, it supplies Primary Coolant Pumps, Shutdown Cooling Pumps and mechanical seals to India's nuclear programme. What happened: In Q3 CY26, revenue grew 18.95% year on year to Rs 772.70 crore. Profit before tax declined 13.9% to Rs 75.60 crore and PBT margin contracted to 9.8% from 13.5%, driven by higher expenses of Rs 707.90 crore. KSB holds a Rs 500 crore NPCIL order for eight RSR 400/2 Primary Coolant Pumps for Kaiga Units 5 and 6, with a 107-pump safety package for Kudankulam under manufacturing at its Shirwal facility. Why it matters: India targets 100 GW of nuclear capacity by 2047 from 8.78 GW today, with nine reactors adding 7.5 GW already under construction. KSB has an established relationship with NPCIL built on repeat orders, certified quality processes and domestic manufacturing. Shirwal capacity was recently expanded by around 20% to support a larger pipeline. Kudankulam expands KSB's experience into light-water reactor technology beyond the domestic PHWR programme. What I am watching: Whether PBT margins recover as Kaiga executes. Nine-month PBT margin has fallen to 9.9% from 13%. NPCIL has issued a tender for 32 pumps and further awards will show whether the margin compression is temporary or structural. My stance: KSB trades at 46.4 times trailing earnings, a premium assigned to its nuclear positioning. ROCE is 24.7% and ROE is 18.4%. The stock has declined 25% over six months on margin concerns. Re-rating requires both earnings and margins to recover. I do not hold a position in KSB Ltd at the time of writing. This is not investment advice.