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Mercury NZ Is Spending $1 Billion on Renewables — And Guiding to $1B EBITDA

NZ's 100% Renewable Generator Is Firing on All Cylinders

Mercury NZ (NZX: MCY) is doing something few NZX companies can claim — delivering strong earnings growth while simultaneously investing $1 billion in new renewable generation capacity. First-half EBITDA surged 28% to $537 million, full-year guidance of $1.0 billion EBITDA was reconfirmed, and three major development projects are all on budget and on schedule. At around $6.24 NZD per share, Mercury NZ NZX stock offers a rare combination of defensive income and genuine growth — but only if you're comfortable with the premium the market attaches to that quality.

Recent Performance: Solid but Not Cheap

Mercury's share price has pulled back from highs but still reflects its quality status:

  • •Current price: ~$6.24 NZD
  • •52-week range: Traded between roughly $5.80 and $7.80+
  • •Market cap: ~$9.05 billion NZD
  • •Analyst consensus target: $7.06 NZD (Buy — implying 11% upside)

The stock trades at a significant premium to other NZX gentailers, reflecting the market's willingness to pay up for a 100% renewable generation portfolio with no fossil fuel transition risk.

Key Metrics at a Glance

  • •Share price: ~$6.24 NZD
  • •Market cap: ~$9.05 billion NZD
  • •P/E ratio: ~22x (trailing normalised)
  • •Dividend yield: ~3.8%
  • •Interim dividend: 10 cents per share (up 4%)
  • •Full-year dividend guidance: 25 cents per share
  • •H1 EBITDA: $537 million (up 28%)
  • •FY2026 EBITDA guidance: $1.0 billion
  • •H1 reinvestment: $270 million into new/existing generation assets
  • •Consecutive dividend years: 15

Mercury reinvested half of its H1 earnings — $270 million — directly into generation assets. That's an extraordinary level of capital deployment for a utility, and it speaks to both the company's cash generation ability and the scale of its growth ambitions.

The Generation Portfolio: Built for the Energy Transition

Mercury generates more than 15% of New Zealand's electricity — all from renewable sources:

  • •9 hydro stations on the Waikato River (the backbone of the fleet)
  • •5 geothermal plants in the central North Island
  • •5 wind farms, headlined by the 222MW Turitea Wind Farm — New Zealand's largest

The Turitea Wind Farm near Palmerston North has been a standout performer since its 2023 commissioning, generating roughly 842 GWh annually — enough to power about 100,000 homes. Over its first two years, it produced approximately 1,600 GWh, representing about 2.5% of NZ's total renewable generation.

$1 Billion in Projects — All on Track

What makes Mercury's current position exceptional is the scale of its development pipeline:

  • •Ngā Tamariki Geothermal Expansion ($220M): Officially opened March 16, 2026, with the new unit online since January. This adds reliable baseload geothermal capacity to complement the hydro and wind fleet.
  • •Kaiwera Downs Stage 2 Wind Farm: Due to begin generating in 2026. Part of Mercury's broader investment in South Island wind capacity.
  • •Kaiwaikawe Wind Farm: Also expected to start generating in 2026.
  • •Puketoi Wind Farm (future): A potential 228MW project generating ~1,040 GWh per year, with a final investment decision anticipated in 2026.

All three current projects totalling $1 billion are on budget and on schedule — a track record that builds confidence in Mercury's project execution capability.

Why Mercury Commands a Premium

Mercury trades at ~22x normalised earnings — higher than Contact Energy (~23x) but notably above Genesis (~13x). The premium reflects:

  • •100% renewable portfolio: Zero fossil fuel transition risk in a country targeting 100% renewable electricity
  • •Waikato hydro system: Nine dams on NZ's longest river provide flexible, low-cost generation
  • •Geothermal baseload: Unlike pure hydro/wind peers, Mercury's geothermal plants run 24/7 regardless of weather
  • •Proven development pipeline: $1 billion deployed with execution track record
  • •ESG credentials: Consistently ranks highly on environmental metrics, attracting institutional ESG-mandated capital
  • •Data centre optionality: NZ is emerging as a data centre destination, which would drive significant new electricity demand

Morningstar estimates Mercury's fair value at $5.90, suggesting the current price embeds meaningful growth expectations. The market is essentially pricing in the successful delivery of Mercury's pipeline — and so far, the company is delivering.

What to Watch

  • •Waikato hydro inflows: Mercury's single biggest earnings variable. A dry year in the Waikato catchment would directly reduce output and profits.
  • •Puketoi Wind Farm FID: A positive final investment decision in 2026 would add another major project to the pipeline (~1,040 GWh/year).
  • •Wholesale electricity prices: Elevated prices have boosted all gentailer earnings. Any normalisation would hit margins.
  • •Green bond issuance: Mercury is considering up to a $250 million seven-year green bond, which would diversify its funding sources for continued development.
  • •Government energy policy: Any regulatory moves to cap electricity prices or reform the wholesale market would directly impact generator earnings.
  • •Interest rates: As a premium-valued utility, Mercury is sensitive to rate expectations. Higher-for-longer rates could compress the multiple.

The Bottom Line

Mercury NZ is arguably the highest-quality pure renewable electricity stock on the NZX. A 28% EBITDA jump, $1 billion in on-track development projects, 15 years of consecutive dividends, and a 100% renewable portfolio make a compelling case. The 3.8% yield provides reasonable income while the growth pipeline adds capital appreciation potential. The risk is the premium valuation — at ~22x earnings, there's limited room for disappointment. But for investors who want to own New Zealand's clean energy transition in a single stock, Mercury is the obvious choice.

*This article is for informational purposes only and does not constitute financial advice. Always conduct your own research or consult a licensed financial adviser before making investment decisions. Past performance is not indicative of future results.*