Business

Claude View

Know the Business

Rain Industries is a commodity upcycler: it buys byproducts from oil refineries (green petroleum coke) and steel mills (coal tar), processes them into calcined petroleum coke (CPC), coal tar pitch (CTP), and downstream advanced materials, then sells them primarily to aluminium smelters and graphite electrode makers. The business is capital-intensive, globally spread across India, the US, and Europe, and heavily leveraged with ~US$830M in term debt. The market is most likely underestimating how long the debt overhang will suppress equity returns even as operating margins normalize – Rain earns well below its cost of capital through the cycle, and interest expense alone consumes a majority of operating profit.

How This Business Actually Works

Rain converts refinery and steel-industry waste into critical aluminium-industry inputs, but the spread between input and output prices – not volume – is what makes or breaks a year.

The revenue engine has three segments. Carbon (~74% of revenue) produces CPC and CTP – the two essential carbon ingredients for aluminium anodes and graphite electrodes. Advanced Materials (~19%) refines coal tar derivatives further into specialty resins, modified pitches, and engineered carbon products for coatings, construction, and chemicals. Cement (~7%) is a regional South Indian business under the Priya brand, largely unrelated to the core.

The cost structure is dominated by raw materials (green petroleum coke, coal tar from steel plants) at 55-65% of revenue, plus energy (natural gas in Europe, electricity), freight/logistics, and depreciation on heavy processing assets. Rain operates 16 plants across three continents with 2.4 MnTPA CPC calcination capacity and 1.3 MnTPA coal tar distillation capacity.

The critical business dynamic: CPC and CTP prices are set by global commodity quotations with a lag versus raw material costs. When commodity supercycles push finished goods prices up faster than input costs (as in CY2022), margins expand dramatically. When cycles reverse (as in CY2023-2024), margins compress because raw material cost resets lag behind falling product prices. Management explicitly measures performance on EBITDA per tonne, not percentage margins, because both input and output prices fluctuate with global commodity cycles.

Bargaining power is limited on both sides. Upstream, Rain depends on oil refiners and steel producers for feedstock – these are large players who treat byproducts as disposal problems but still negotiate hard. A new structural pressure: battery anode materials (BAM) producers are now competing for the same GPC feedstock, driving up input costs. Downstream, aluminium smelters are concentrated (a handful of global giants), and CPC/CTP are specification-driven commodities with limited differentiation. Rain's competitive advantages are scale (#2 globally in CPC, #1 in CTP), geographic reach, and its blending/logistics network that allows it to optimize raw material sourcing across continents.

The Playing Field

Rain is the only truly global, vertically integrated carbon products player listed in India, but its leveraged balance sheet makes it the riskiest equity in the peer set.

The standout comparison is Himadri Speciality (HSCL). It operates in the same coal tar value chain but has pivoted aggressively into specialty chemicals and battery materials, earning 22% ROCE versus Rain's 8%. HSCL trades at 6x Rain's market cap despite much smaller revenue, because the market rewards capital efficiency and a credible growth narrative over raw scale. Goa Carbon is a useful cautionary tale – a small CPC producer with no integration, negative returns, and a reminder of what this business looks like without scale advantages.

Rain's real global competitors (Oxbow Carbon, C-Chem/Koppers) are unlisted. Among listed Indian peers, Rain has a unique position as the only company operating across all three links of the carbon value chain (calcination, distillation, advanced materials) at global scale. The problem is that this breadth comes with a capital-intensive footprint and US$830M of term debt that peers largely avoid.

Is This Business Cyclical?

Deeply cyclical, with the aluminium price cycle and the raw material cost lag driving violent margin swings that the leveraged balance sheet amplifies into equity-level destruction.

The CY2022 supercycle (₹1,577 Cr net income, 17% ROCE) was followed by the sharpest downturn in Rain's history. CY2023 saw a net loss of ₹796 Cr as finished product prices collapsed while raw material costs were still elevated from prior contracts. CY2024 produced another loss of ₹450 Cr. CY2025 shows a fragile recovery to ₹136 Cr profit as margins normalized to 13%.

The cycle hits through three simultaneous channels:

Channel 1 – Raw material price and availability. GPC supply depends on oil refinery economics. Coal tar supply depends on blast furnace steel production, which is structurally declining as EAF steelmaking grows. Since CY2023, the BAM industry has been competing for the same GPC feedstock, creating a structural squeeze that management calls "cyclical" but may prove permanent.

Channel 2 – End-market demand. Aluminium smelter demand (42% of consolidated revenue) drives CPC volumes. China has imposed production caps on smelters, shifting incremental growth to Indonesia, Middle East, and India – regions where Rain is well-positioned. Global aluminium production continues to expand (~3-4% annually), but the demand growth is geographically shifting.

Channel 3 – Currency and energy costs. Rain earns in USD and EUR but reports in INR. European natural gas costs surged post-2022 from EUR 10-20/MMBtu to over EUR 100/MMBtu, settling around EUR 30-40/MMBtu. This directly compresses distillation margins in European operations.

An additional regulatory cycle specific to India: from 2018 to 2024, import restrictions on GPC/CPC forced Indian calcination plants to run below capacity. The February 2024 CAQM relief (expanded national GPC import quota from 1.4 MT to 1.9 MT, plus SEZ relaxation) enabled Rain to ramp Indian plants to ~90% utilization and reintegrate its global blending strategy. This is a genuine structural positive for Indian operations.

The Metrics That Actually Matter

For a leveraged commodity processor, the only metrics that matter are the operating spread, interest coverage, and net debt/EBITDA.

EBITDA per tonne (Carbon): The single most important metric. Management targets a return to the historical US$60-80/tonne range. CY2025 saw recovery toward ~US$50/tonne as calcination margins stabilized and distillation realizations improved. This is the purest measure of whether the commodity spread is healthy.

Interest coverage: At 2.3x (operating income ₹2,137 Cr vs interest ₹922 Cr), this remains below the 3x comfort zone for a cyclical manufacturer. In CY2023, coverage dropped to 1.1x – dangerously close to covenant breach territory.

Net Debt/EBITDA: At 3.2x, manageable but not comfortable. Management targets approaching 3.0x, with 2.5x as a stretch goal. The cement expansion capex (₹757 Cr through CY2027) will work against deleveraging.

CPC-GPC spread: Rain does not disclose this directly, but it can be inferred from Carbon segment margins. When Carbon EBITDA margin is above 15%, the spread is healthy. CY2025 Carbon EBITDA margin of ~16% (₹1,997 Cr on ₹12,498 Cr revenue) suggests the spread has meaningfully normalized.

Cash conversion cycle: At 134 days in CY2025 (up from 104 in CY2024), inventory days ballooned to 137 – the highest in a decade. This reflects higher raw material stockpiling as Rain builds buffer against GPC availability risks but ties up working capital.

What I'd Tell a Young Analyst

Do not start with the revenue line. Start with the debt maturity schedule and the interest coverage ratio. Rain's operating business is decent – it is the #2 CPC producer and #1 CTP producer in the world, with real scale advantages and a three-continent logistics network. But the ~US$830M of term debt (primarily a EUR 311M loan due October 2028 and US$445M notes due September 2029) means the equity is a leveraged call option on the commodity cycle. In a good year (CY2022), the stock triples. In a bad year (CY2023-24), you lose money even as the plants keep running.

The BAM feedstock competition is the structural question. Management calls it "cyclical rather than structural" – that is the single most important claim to verify. If BAM demand for GPC grows as expected with the EV transition, Rain's input cost floor has permanently risen and the old US$60-80/tonne EBITDA corridor may not be recoverable. Watch how Himadri's battery materials pivot performs as a leading indicator.

India carbon distillation (coal tar pitch production starting H2 FY2026) and the cement brownfield expansion (3.8 MT capacity by H2 CY2027) are real growth initiatives, but both consume cash that could otherwise go toward deleveraging. The cement expansion at ₹757 Cr with a 14-16% target IRR is fine on a standalone basis but raises the question of whether Rain should be expanding a marginal business.

The single most useful valuation exercise: take a mid-cycle EBITDA of ₹2,200-2,500 Cr, subtract ₹900 Cr interest and ₹800 Cr depreciation, apply 32-36% tax, and you get ₹300-500 Cr net income – roughly ₹9-15 per share. At the current price of ₹127, you are paying 8-14x mid-cycle earnings. That is not expensive for a global industrial, but it is not cheap for a business that earns below its cost of capital through the cycle and carries refinancing risk in 2028-2029. The question is always: will Rain ever sustainably delever, or will the next downcycle consume whatever debt reduction the upcycle produced?