Castellum Secures Nasdaq Green Equity Designation Renewal Following S&P Global Sustainability Audit

Castellum has successfully retained its Nasdaq Green Equity Designation on Nasdaq Stockholm, signaling a continued alignment between commercial real estate operations and stringent environmental standards. For fintech professionals and ESG-focused investors, this renewal validates the company’s ability to maintain high thresholds of green revenue and investment amidst tightening regulatory scrutiny.

What was announced

Castellum has once again been approved for the Nasdaq Green Equity Designation, a voluntary label for companies listed on Nasdaq’s Nordic markets that demonstrate a significant commitment to the green transition. To maintain this status, a company must undergo an annual external review to ensure its revenue and investments meet specific environmental criteria. The designation is designed to provide increased transparency for investors seeking to identify listed entities with a substantial share of sustainable business activities.

In the most recent assessment conducted by S&P Global Shades of Green, Castellum’s financial performance significantly exceeded the minimum requirements. The review found that 81 per cent of the company’s revenue is derived from energy-efficient buildings, comfortably surpassing the Nasdaq threshold of 50 per cent. Furthermore, S&P Global Shades of Green assessed that 78 per cent of Castellum’s total investments in 2025 were classified as green. These figures highlight the concentration of sustainable assets within the firm's portfolio and the allocation of capital toward further environmental improvements.

The designation process involves a rigorous look at how a company’s core business contributes to climate change mitigation or adaptation. For Castellum, this involves the management and development of commercial properties that meet high energy performance standards, which now constitute the vast majority of its income stream.

"Maintaining our classification confirms that Castellum has a portfolio of energy-efficient and sustainable properties, and that a large share of our investments contributes to developing it further,"

Filip Elland, Head of Sustainability at Castellum.

The companies involved

Castellum is a prominent Swedish property company focused on the ownership, management, and development of commercial real estate in high-growth urban areas. As of June 30, 2026, the company’s property portfolio was valued at approximately SEK 134 billion. It is currently listed on the Nasdaq Stockholm Large Cap segment. Notably, Castellum holds the distinction of being the only Swedish property company included in the Dow Jones Sustainability Indices (DJSI), a global benchmark for corporate sustainability performance.

The assessment was facilitated by Nasdaq Stockholm, the primary securities exchange for the Nordic region, and S&P Global Shades of Green. The latter provides independent, research-based evaluations of green bond frameworks and equity designations, offering investors a "shade" of green to indicate the environmental impact of financial activities. The Dow Jones Sustainability Indices, which also tracks Castellum, represents a collection of indices managed by S&P Dow Jones Indices that evaluate the ESG performance of thousands of publicly traded companies worldwide.

What this means

The renewal of this designation underscores a growing trend where the "greenness" of a company is no longer a marketing claim but a verified financial metric. As 81 per cent of Castellum’s revenue is now tied to energy-efficient assets, the company is effectively insulating itself against the rising costs of carbon and energy volatility. This puts significant pressure on other real estate investment trusts (REITs) and property developers who have yet to achieve similar transparency or performance levels, as institutional capital increasingly flows toward verified green designations.

However, the reliance on external reviewers like S&P Global Shades of Green raises broader industry questions about the standardisation of "green" definitions. While Castellum has cleared the 50 per cent threshold with ease, the sector must grapple with how these benchmarks will evolve as building regulations become stricter. The primary challenge for the market now is whether these designations will remain a differentiator or eventually become a baseline requirement for any firm seeking to maintain a listing on major European exchanges.