Climate Tech Investors in 2026: Who Is Raising New Climate Funds and How to Pitch Them

Climate founders often ask which investors have new money. Form D filings are one place to look, because a fund must file within 15 days of its first sale. We reviewed every filing in our data from September 28 to October 30, 2026 (4,422 vehicles after removing duplicates) and found 34 tagged as energy or climate. They reported $380.9 million in total, and 14 of them reported $0. This guide ranks the climate-focused funds we could identify, says what we could and could not confirm about each, and explains how to pitch.

What the Filings Show

• 34 vehicles tagged energy or climate, out of 4,422 in the period, so under 1 percent of all filings
• By type: 15 labeled venture capital (just $4.1 million combined), 12 private equity ($205.3 million), 5 other investment funds ($90.9 million) and 2 hedge funds ($80.7 million)
• 14 reported $0, which usually means a new vehicle that has not reported an amount
• The largest filing, Kimmeridge Energy Engagement Partners, reported $200 million, but it is labeled private equity and appears to be an energy fund, so we leave it out of the climate ranking below

The pattern is clear: most climate money in these filings sits in private equity and credit-style funds, and the venture-labeled vehicles are small, mostly deal-by-deal syndicates. Founders raising a seed round should read that as a sign to build a list that includes angel syndicates, not only large funds.

The Ranking

Ranked by the amount reported in the filing. Where the amount is $0, we rank by relevance to venture-style climate investing.

1. WindSail Climate Capital Fund II, L.P. ($26.0 million, filed October 28). WindSail Capital Group is a Boston firm that describes itself as providing growth capital to companies focused on energy innovation and sustainability. Profiles on PitchBook and CB Insights list earlier WindSail vehicles as debt funds, so this may be a credit-style product and not equity. We could not confirm the Fund II name in public sources
2. Innovative Energy Fund II ($15.6 million, filed October 6). We found no public information on the sponsor or strategy beyond the name
3. Smart Society Capital Energy Technology Growth Fund I, LP ($5.25 million, filed October 6). A first fund aimed at growth-stage energy technology, judging by its name. We found no public coverage
4. GEF LatAm Climate Solutions Fund IV-B and GEF US Climate Solutions Fund III ($0 each, filed October 27 and 29). GEF Capital Partners closed LatAm Climate Solutions Fund III at R$1.05 billion, about $214 million, according to ESG Today, and the Green Climate Fund approved a proposal for a $325 million Fund IV focused on Brazilian middle-market companies. The Fund IV-B vehicle is likely linked to that raise, though we could not confirm the connection
5. TPG Rise Climate II FOF, L.P. and related vehicles ($0, filed September 29). TPG's second Rise Climate fund has been reported at about $10 billion, according to Dealroom citing Bloomberg, though we found no TPG press release. It is a large-cap private equity fund, so it suits later-stage and infrastructure-style companies

The Syndicates: Climate Collective and Cool Climate Collective

Eight filings carry the Climate Collective or Cool Climate Collective name. They are deal-by-deal series, each a single-company vehicle, and they reported amounts from $46,362 to $499,981. Two filings under Climate Venture Capital, LP, F3 and F4, also appear. Across the ten, the total was $1.37 million and the median was about $104,000.

Public profiles describe Cool Climate Collective as an angel syndicate on AngelList that invests in early-stage climate technology, with listed check sizes of $75,000 to $250,000 and a portfolio that includes General Fusion and Bowery Farming. We could not confirm that every Climate Collective filing belongs to that group, so we treat the link as likely and not certain. We found nothing public on Climate Venture Capital, LP.

For a founder, syndicates are useful because they write quick, small cheques and can bring many angels to one round.

What Climate Investors Look For

• Evidence that the technology works outside a lab, such as a pilot, a signed customer or a measured result
• A path to cost that can compete without subsidies, since policy support can change
• Capital intensity, meaning how much money you need before revenue, and how much can come from non-dilutive grants or debt
• A clear buyer, such as a utility, manufacturer or government
• A team with technical depth and commercial experience

How to Choose Between Fund Types

• Angel syndicates: best for pre-seed and seed, with small cheques and fast decisions
• Venture funds: best for seed to Series B when you have a product and early customers
• Growth and private equity funds: best for proven companies that need large amounts for projects or acquisitions
• Debt and credit funds: best when you have contracted revenue and want to avoid dilution

How to Pitch a Climate Fund

• Get a warm introduction from a portfolio founder, a co-investor or an adviser
• Lead with the problem, the proof and the round size, in a short note
• Prepare your data room, your cap table and your technical evidence
• Ask whether the fund expects to be the lead investor and what its term sheet usually includes
• Ask how follow-on money works, since climate companies often need several rounds

Questions to Ask Before You Pitch

• Does the fund invest equity, debt or both?
• What stage and check size does it prefer?
• How does it decide when technology is proven?
• Which fund vehicle would invest, and how much capital remains?

What We Could Not Confirm

We could not confirm the sponsors of several smaller vehicles, whether the filing amounts are final closes or the strategy of Fund II at WindSail. Filings show what a vehicle reports, not what it will invest. Check each firm's own materials before you approach it.

Browse the investor directory for more active funds, or explore active capital on AngelLinx @ angellinx.ai/register.

AngelLinx Intelligence | angellinx.ai