Climate Capital Stack

Climate Capital Stack

The ClimateTech Exit Conundrum, Part 1

Why M&As Are Surging and What It Means for VCs

Daniel Kriozere's avatar
Daniel Kriozere
Mar 03, 2025
∙ Paid

ClimateTech is experiencing a fundamental shift in startup exits, with mergers and acquisitions (M&As) far outpacing initial public offerings (IPOs). Over the past five years, the number of ClimateTech exits has declined compared to other sectors, and in 2023, IPOs, SPACs, and M&As in ClimateTech were down by 50%.

Despite the continued influx of $82 billion in new investment over the past year alone, this trend highlights a growing imbalance. Startups are getting funded, but exit opportunities remain constrained. And for VCs, the increasing reliance on M&A challenges the traditional return model.

Exit Trends in ClimateTech

From 2020 to 2023, ClimateTech was booming. More than 2,500 companies raised $150 billion across 4,000 deals. But when it came time for exits, the story was different.

  • In 2023, SPAC activity collapsed by 89%, mirroring the broader downturn in public market enthusiasm for speculative climate bets.

  • IPOs in ClimateTech slowed dramatically, particularly in the Transportation and Energy sectors. These sectors saw the highest number of public market exits but still fell short of expectations.

  • Since 2020, M&A has accounted for 65% of all exits, indicating that corporations are the dominant dealmakers.

This shift reflects a deeper reality: ClimateTech IPOs are difficult to execute. Many companies require long development cycles, regulatory approvals, and CapEx investment, making them ill-suited for the high-growth, high-momentum expectations of public markets.

Why M&A Is Dominating ClimateTech Exits

M&A has become the default exit strategy for ClimateTech startups, happening earlier in their lifecycle. Several factors are driving this:

  • Faster Liquidity: Acquisitions provide quicker returns than waiting for a company to reach IPO readiness, especially for capital-intensive technologies.

  • Valuation Uncertainty: Many climate solutions operate in unproven markets, making valuations difficult and IPO pricing unpredictable.

  • Strategic Fit Over Standalone Scaling: Corporations see acquisitions as a way to integrate climate solutions into existing supply chains, rather than letting startups build independently.

  • Scaling Challenges: ClimateTech often requires significant capital investments beyond what VCs can provide. Large corporates offer deeper pockets and established distribution networks.

As a result, corporates now drive over 70% of ClimateTech M&A, and their participation is trending toward later-stage deals. In 2024, 61% of corporate-backed transactions were mid- or late-stage acquisitions, showing that larger companies prefer to buy proven technologies rather than gamble on early-stage innovation.

The VC Model at Risk: Why Early M&A Create Tension

This shift creates fundamental challenges for VCs. The venture model depends on a couple high-multiple exits to balance portfolio losses, but early M&A activity disrupts this equation.

  • Limited Upside Potential: When startups exit earlier than expected, they often sell for lower multiples, reducing the outlier wins that drive fund performance.

  • Shorter Holding Periods: The traditional VC timeline assumes a 7-10 year window before exit. Early M&A compresses this cycle, forcing premature sales.

  • Valuation Gaps: M&A dealmaking is based on strategic value, not necessarily market comps, often leading to lower-than-expected returns.

  • Fewer IPO Pathways: The declining IPO pipeline removes a key mechanism for maximizing investor returns, further complicating fund economics.

This reality is challenging for early-stage VCs, whose investment thesis often relies on a startup scaling independently before exiting at a premium in the public market.

Adapting to the New Exit Reality

Given the shift towards M&A-driven exits, VCs investing in ClimateTech will need to rethink their strategies by:

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