| TKTaryn Kutches | North America | Grand Haven, United States | Leadership and governance, Climate solutions, Economics and finance |
| RLRob de Laet | Europe | Amsterdam, Netherlands | Climate solutions, Leadership and governance |
| MLMaría José Lecaros Lanas | North America | Miami, United States | Economics and finance, Leadership and governance |
| GLGregory Landua | North America | Vermont, United States | Economics and finance, Climate solutions, Indigenous knowledge |
| GLGeoff Lawton | Europe | New South Wales, Australia | Agriculture and food, Leadership and governance, Climate solutions |
| OLOlivia Lazard | Europe | Brussels, Belgium | Climate solutions, Leadership and governance, Economics and finance |
| MLMauricio Lecaro | North America | San José, Costa Rica | Leadership and governance, Climate solutions, Economics and finance |
| JLJeremy Leggett | Europe | London, United Kingdom | Climate solutions, Economics and finance |
| LLLucimara Letelier | South America | Brasília, Brazil | Leadership and governance, Climate solutions, Indigenous knowledge |
| JLJohn D. Liu | North America | Thousand Oaks, United States | Climate solutions |
| ALAlessandra Lomonaco | Europe | Milan, Italy | Leadership and governance, Climate solutions, Economics and finance |
| LLL. Hunter Lovins | North America | Longmont, United States | Climate solutions, Leadership and governance, Economics and finance |
| TLTica Lubin | North America | California, United States | Leadership and governance, Climate solutions, Economics and finance |
| KLKelly Luo | North America | Toronto, Canada | Leadership and governance, Climate solutions, Economics and finance |
| TLTobias Luthe | Europe | Switzerland | Leadership and governance, Climate solutions |
| DMDonnie Maclurcan | South America | Patagonia, Argentina | Economics and finance, Leadership and governance |
| LMLooby Macnamara | Europe | Herefordshire, United Kingdom | Leadership and governance, Climate solutions |
| MMMichelle Maloney | Oceania | Brisbane, Australia | Indigenous knowledge, Leadership and governance, Climate solutions |
| PMPamela Mang | North America | Santa Fe, United States | Leadership and governance |
| LMLuciana De La Mare | South America | Salvador, Brazil | Leadership and governance, Climate solutions, Indigenous knowledge |
| NMNicole Masters | Oceania | Hawke's Bay, New Zealand | Agriculture and food, Leadership and governance, Climate solutions |
| DMDavid "Mas" Masumoto | North America | Del Rey, United States | Agriculture and food, Leadership and governance |
| MMMariana Mazzucato | Europe | London, United Kingdom | Economics and finance, Leadership and governance |
| IMIain Tolhurst MBE | Europe | South Oxfordshire, United Kingdom | Agriculture and food, Leadership and governance, Climate solutions |
