Stock Market Week 20/26: RENIXX Breaks Out Toward 1,500 Points – Solaredge, Enphase, Plug Power and Ormat Post Double-Digit Gains

Münster (Germany) – The RENIXX reached new yearly highs last week and temporarily moved toward the 1,500-point mark. On 14 May 2026, a new yearly high of 1,468.28 points was reached. By the end of the week, however, a consolidation set in.

The renewable energy stock index RENIXX World rose by 4.2% last week to 1,434.36 points (closing price, 15 May 2026). Positive momentum continued to come from the ongoing earnings season as well as new product announcements in the field of decentralized energy and efficiency technologies. Solaredge performed particularly strongly, surging around 50.6%. Double-digit gains were also recorded by Enphase Energy (+47.3%), Plug Power (+22.6%) and Ormat (+10.2%). The biggest losses were seen in Goldwind (-13.9%), Canadian Solar (-9.4%), Nordex (-3.5%), BYD (-3.4%) and EDP Renewables (-3.3%). Based on the current closing price, the RENIXX annual performance stands at +26.9%.

Company news Week 20/26

Enphase Energy has started pre-orders in the U.S. for its new IQ9S-3P Commercial Microinverter. According to the world-leading provider of microinverter-based solar and battery systems, this is the most powerful microinverter in Enphase’s history. The stock of Enphase Energy jumped 47.3% to €45.46.

Plug Power increased Q1 revenue by 22% to USD 163.5 million (Q1 2025: USD 133.7 million) and improved margins. Gross GAAP margin improved significantly from -55% in the prior-year quarter to -13%. Growth drivers included material handling and electrolyzer businesses. CEO Jose Luis Crespo aims to achieve positive EBITDA in Q4. The Plug Power stock rose 22.6% to €3.25 at market close.

Cadeler installed the first foundation for the offshore wind farm Hornsea 3 with a capacity of 2.9 GW. The Hornsea 3 offshore wind farm, developed by Ørsted, is expected to reach a total capacity of 2.9 gigawatts once completed and supply electricity equivalent to more than 3.3 million UK households. Up to 231 Siemens Gamesa SG 14-236 DD turbines of around 14 MW each are planned. Cadeler shares gained 3.4% to €6.30.

Verbund closed the first quarter of 2026 with a significant decline in revenue and earnings. The Austrian utility cited below-average water availability and falling electricity prices as key reasons. Revenue fell by almost 16% to €1.94 billion (Q1 25: €2.30 billion), EBITDA dropped 26% to €534.6 million (Q1 25: €723.9 million), and operating profit declined 33% to €386.5 million (Q1 25: €575.1 million). Net income came in at €269.8 million (Q1 25: €396.7 million), with earnings per share of €0.78 (Q1 25: €1.14). Despite this, Verbund shares rose 2.6% to €61.35.

Northland Power reported a strong increase in revenue and profit in Q1 2026. Energy revenues rose to CAD 774.6 million (Q1 25: CAD 665.1 million), up around 16%. Adjusted EBITDA increased by 18% to CAD 427.4 million (Q1 25: CAD 361.2 million). Northland Power shares fell slightly by 0.4% to €14.32.

Ørsted and Poland’s PGE have begun offshore installation work on the 1.5 GW Baltica 2 project. With the successful installation of the first monopile foundations, the joint project has entered a key construction phase. Baltica 2 has a 25-year inflation-linked Contract for Difference (CfD) with the Polish state. The starting price is based on an agreed value of €71.82 per MWh from 2021, adjusted for cumulative inflation until the CfD begins. Ørsted shares declined 0.8% to €21.67.

Technical outlook: RENIXX breaks toward 1,500 points

From the end of 2023 to early January 2025, the RENIXX moved in a pronounced sideways range between 1,000 and 1,200 points. The interim low of 748 points in 2025 remains the key long-term support zone.

Starting from this base, the index has significantly accelerated its upward trend and reached a new yearly high of 1,468 points last week. This means the 1,300-point area has been sustainably broken, confirming the broader breakout. The psychologically important 1,500-point level is now in focus as the next target.

In the short term, a consolidation is visible after the strong upward move. However, momentum remains positive as long as the index stays above the former resistance zone of 1,280 to 1,300 points, which now acts as the first support area. Below that, the 1,200-point level remains an important medium-term reference.

RENIXX weakens slightly at the start of the new week

In early trading of the new week, the RENIXX is slightly down, with almost all constituents declining. The biggest losses are seen in ERG SpA, Xinyi Solar, Solaredge, Daqo New Energy and Cadeler. Only Goldwind, Meridian Energy and Ørsted are currently in positive territory.

About the global stock index RENIXX World and the planned RENIXX ETF

The RENIXX® World (Renewable Energy Industrial Index, ISIN: DE000RENX014) is the world’s first stock index for renewable energy and the oldest global benchmark for this industrial future sector. It covers wind power, solar energy, bioenergy, geothermal energy, hydropower, electric mobility, hydrogen, and fuel cell industries.

The index includes 30 international companies with the highest free-float market capitalization and reflects both performance and global market developments in the renewable energy sector.

RENIXX started on 1 May 2006 with a base value of 1,000 points; a back-calculation to 2002 was performed. The index is available through major financial information providers such as Bloomberg, Reuters, Financial Times, BlackRock (Aladdin) and Wallstreet Online.

On the occasion of its 20th anniversary, IWR plans to launch an exchange-traded fund (ETF) that will make the RENIXX transparent, regulated, and investable. The potential implementation is planned in cooperation with an established white-label ETF provider.

Source: IWR Online, 18 May 2026