In June 2026, Oldcastle Infrastructure (a subsidiary of CRH, the Irish building materials conglomerate) completed the acquisition of Axius Water for $700 million (source). The company’s origination, growth and exist story has parallels to what I see can be built in India’s climate and MSME sector today.

Axius was not found. It was constructed. In 2019, KKR Global Impact and XPV Water Partners co-founded the platform to consolidate a fragmented segment of the water treatment market around nutrient removal — the reduction of nitrogen and phosphorus from municipal and industrial wastewater. They started with two companies, Nexom and Environmental Operating Solutions, and made five more acquisitions over six years, building Axius into what its founders described as a “global leader in advanced water quality solutions.” By the time CRH came calling, Axius had over 14,000 water treatment projects in its history, 500 employees, and deep application knowledge across North American municipal and industrial markets.

The exit buyer, CRH, is building an end-to-end water infrastructure platform, and Axius gives it the treatment technology layer to sit on top of Oldcastle’s existing precast concrete pipes, drainage systems, and stormwater management products. The logic is clear: this is a construction materials company buying a water quality business because tightening nutrient discharge regulations make advanced treatment a growth market.

Why the investor pairing worked: capability gap as investment thesis

The two investors that built Axius brought complementary skillsets.

XPV Water Partners is a boutique fund with over $1 billion in AUM dedicated to water. XPV knew which companies in the fragmented nutrient-removal space were worth acquiring, how to run technical due diligence on wastewater processes, and how to work with management in a sector where operators are deeply specialised and wary of financial sponsors who don’t understand the technology. Sourcing and DD in this segment require credibility that generalist funds don’t have.

KKR brought capital at a scale that XPV alone could not deploy across seven acquisitions. More importantly, it brought the M&A structuring capability — the platform-building playbook, the shared services integration, the governance infrastructure — that turned a collection of small companies into a platform that an industrial strategic will pay a multiples for.

Neither firm could have executed this alone.

KKR also brought the impact mandate: Axius sits within KKR’s Global Impact Fund, which means both investors were operating under a shared thesis that water quality is a societal need with durable commercial tailwinds.

“Specialized sector expertise, aligned capital, and strong leadership can come together to build a scaled platform in a critical area of water infrastructure.” — David Henderson, Managing Partner, XPV Water Partners, on the Axius exit.

The APAC evidence: same mechanic, different assets

Axius is a US story, but the co-build mechanic has APAC precedents.

O2 Power (India, 2020–2024) was co-founded by EQT Infrastructure and Temasek as a greenfield renewable energy platform in 2020, committing $500 million. Over four years, they built it into one of India’s largest renewable energy platforms, with 4.7 GW of secured capacity. They sold 100% to JSW Neo Energy for $1.5 billion in March 2025. The exit buyer — JSW Energy — was a corporate strategic extending its own clean energy ambitions. This is the same mechanic as Axius: two investors with complementary profiles (EQT’s infrastructure governance + Temasek’s India market access and patient capital) but one purpose-built platform that got a strategic exit.

GreenCollar is Australia’s leading environmental markets platform — it works with landowners, particularly farmers, to develop land-based carbon projects generating carbon credits. KKR Global Impact invested in 2020; Ontario Teachers’ Pension Plan, whose Natural Resources group has deep experience in agriculture, aquaculture, timberland, and natural climate solutions, entered in March 2022 and subsequently acquired KKR’s stake in 2023, taking a significant majority. The exit here was to a financial natural-resources investor. Ontario Teachers’ saw GreenCollar as a natural capital platform that fit its long-horizon asset base.

These three deals share a template: two investors with non-overlapping capabilities, a platform built or scaled during the hold, and an exit to a buyer who valued the integrated platform over the sum of its parts.

The India question: succession gaps, PE capital, and the co-build opportunity

India is receiving PE interest on multiple fronts. Global PE dry powder remains ~USD 2.2 trillion; over 40% has been ageing more than two years. India was the only APAC market with double-digit growth in both deal value and count in 2024. Promoters are seeking solutions for succession, balance sheet simplification, and reduced exposure to business volatility. Blackstone, EQT and Bain Capital have all closed India/Asia-focused funds in recent weeks.

Parallelly, India’s mid-market is experiencing a generational shift: nearly 36% of family businesses lack a formal succession plan, and close to half of founders no longer expect their children to take over. Kotak’s substack article frames this explicitly as a capital-cycle event: when succession anxiety meets record dry powder, mid-sized, cash-flow-positive operating companies with opaque governance become acquisition and consolidation targets.

Can two investors — a generalist PE with the succession and governance playbook, and a sector specialist with environmental technology conviction — organize like KKR and XPV in the US to consolidate and scale India’s growing climate sector and the mammoth MSME sector?

The Indian equivalents of the companies that KKR and XPV rolled up into Axius already exist. India has hundreds of regional ETP and STP operators, waste management firms, and agri-processing businesses — many of them family-owned, profitable in narrow terms, and structurally constrained from scaling by governance limitations and working capital cycles. Several are operating in sectors with direct regulatory tailwinds: tightening effluent discharge norms under the Environment Protection Act, Zero-Liquid Discharge mandates, plastic waste management rules, and MSME-linked renewable energy mandates.

The succession cycle is creating willing sellers at exactly the moment PE capital is looking for Indian targets. A regional STP operator with 15 years of municipal contracts with a founder approaching 60 is an acquisition target for a platform roll-up. If you multiply that across water treatment, environmental compliance testing, waste management, and renewable energy services, the addressable universe of family-owned, cash-flow-positive climate-positive businesses in India is large.

This structure addresses three linked problems. India’s climate sector cannot scale without institutional capital willing to take control positions in operating businesses. India’s PE market cannot deploy its capital without credible sector DD in unfamiliar verticals. India’s family-owned climate businesses cannot survive the succession gap without a professionally governed acquirer.

The exit buyer pool of infrastructure conglomerates, global water and waste majors expanding in India, and PE platforms at a higher valuation tier are all plausible acquirers of an environmental services platform.

Precedent and possibilities

There is precedent at the fund-level, if not at deal levels. EverSource Capital is a Joint Venture Fund between Everstone Group (India and Southeast Asia PE) and the founders of Lightsource BP (one of the largest renewable energy developers globally). EverSource’s portfolio companies like GreenCell Mobility and EverEnviro were built through the same co-build logic as Axius, with Everstone supplying deal infrastructure and Lightsource supplying energy-sector operating intelligence. (Eversource is also the promoter of Ecofy, India’s first green NBFC, which I covered last month.)

On the sector side, GEF Capital Partners runs a $440 million climate-focused growth fund out of India with waste recovery and water security in its mandate. Circulate Capital has built a portfolio of waste and recycling SMEs, proving that environmental services businesses can absorb institutional capital. On the scale side, global buyout firms are raising Asia/India-focused vehicles and hunting for control transactions in the mid-market.

What does not yet exist is the Axius-like combination. But the conditions in India are beginning to align.