Halcyon

Big ideas. New connections. Here’s more from our unforgettable week in Accra. 🎦🌍

Building on the momentum of DC Climate Week, our 2026 Global Climate cohort joined us last week in Washington, DC, where founders kicked off their Halcyon journey with a week of collaboration with peers, partners, and supporters driving progress in climate adaptation and resilience. 🏢 We were grateful to be hosted at the AWS Skills Center in nearby Arlington for Monday's programming, spanning across interactive peer case consultations, pitch practices, and masterclasses. ☁️ We were also hosted at Amazon’s HQ2 for an evening of investor speed networking, giving our founders the chance to pitch and engage in conversation and feedback with investors and ecosystem partners. ✈️ We’ll be continuing to engage with this fantastic group through virtual programming before reuniting in Los Angeles in September. Thank you to Twilio.org Impact Fund, a fund of ImpactAssets (@twilio ), and @AmazonWebServices , Inc. (AWS) for your support of the program.

There’s a moment most founders know: the "valley of death" between early-stage support and sustainable growth that claims a staggering number of promising ventures every year. At Halcyon, we work with founders exactly in this moment—and we’ve come to believe that the “valley of death” is the wrong frame entirely. Read more from Adam Caplan, Halcyon's Capital Strategy & Investment Manager, at the link in our bio. 🔗

❗️LESS THAN ONE WEEK TO APPLY❗ We’re looking for founders ready to scale their health ventures and deepen their impact. 🩺 Selected entrepreneurs will attend a one-week, in-person residency in Chicago, Illinois, five virtual programming days, and a final one-week, in-person residency in Washington, DC. ✈️ Submit your eligibility form by this Friday at 11:59 PM ET. Link in bio. 🔗

For the second year in a row, Halcyon returned to Accra to kick off our 2026 Climate Resilience & Food Security in Africa program.     Throughout the week, we were grateful to be hosted by our friends at @kicghana , where we held a series of masterclasses, pitch practices, and peer case consultations, building knowledge sharing and peer learning among the cohort.     Founders also participated in Ghana Venture Capital and Private Equity Alliance’s conference, connecting them with West African investors and policymakers.   ✈️ We’ll return in-person with the fantastic founders of this program for a second residency week in Nairobi in July.     Thank you to @AmazonWebServices , Inc. (AWS) for their support of this program.

What does it take to build climate-resilient cities? At our @dcclimateweek event last night, four founders shared how they’re rethinking the built environment, from rooftop agriculture to electrification, net-zero housing, and nature-based infrastructure. In a conversation that touched on capital strategies, finding your climate niche, and overcoming obstacles, one theme cut across it all: real impact starts with deep community engagement. Special shoutout to Halcyon alums Larry Davis (Green Mechanics), Kristof Grina (@uptopacres ), and Jordan Taylor (@synergygrid_ ), who joined Jane Chen (@getstepwise ) on the panel, moderated by Halcyon’s Alexis Kartalian. Thank you to the team at Up Top Acres and everyone who joined us for an evening of conversation, connection, and rooftop views.

🌟Introducing Halcyon’s 2026 Global Climate cohort.🌟  This program supports global ventures who are tackling pressing challenges in climate adaptation and resilience. These selected entrepreneurs will attend a one-week, in-person residency beginning this week in Washington, DC, virtual programming, and a final one-week, in-person residency in Los Angeles, California.  This program is run with support from Twilio.org Impact Fund, a fund of ImpactAssets (@twilio ), and @AmazonWebServices , Inc. (AWS).   Meet the founders and ventures at the link in our bio. Thank you to our Selections Committee for their expertise and dedication in shaping this cohort:    • Nathan Arbitman (OnePlanet)  • Gus Bessalel  • Justin Brodie-Kommit (Lichen Ventures)  • Andrew Don (Cordillera)  • Fatima-Ezzahra Zouita (Twilio.org)  • Chad Gallinat (Conservation X Labs)  • David Lacklen (Climate Capital)  • Helen Manich (Manich Strategic)  • Judith Munyurwa (Giraffu Limited)  • Jean Nelson-Houpert (Volt Energy Utility)   • Dean Remedios (Deloitte)  • Asaf Rozin (Stampfeet)  • Jamil Wyne (The Hazelwood Network)  • Brooke Zhang (Tailwind)    @humblebeekind , @umihanik , @monevstudio , @mr_jrlawson , @thermoverse , @brayonpieske , @trustcarbon

Come along with Halcyon's Erna Redzepagic as she attends our recent 2026 LAC Climate residency week in Bogotá, Colombia. ✈️ ➡️ Want to join the Halcyon community? We're still accepting applications for our 2026 Caribbean Climate Pre-Accelerator—link in bio.

2025 Global Climate alum Anjali Devadasan has been named to the 11th annual @ForbesUnder30 Europe list in the Manufacturing & Industry category. Released yesterday, the list recognizes young innovators, entrepreneurs, and changemakers shaping the future of Europe and beyond. Congrats Anjali and Team @Treevaturbines ! 🎉

The application window is OPEN for our 2026 US Health Accelerator 🌎🩺 Selected entrepreneurs will attend a one-week, in-person residency in Chicago, Illinois, five virtual programming days, and a final one-week, in-person residency in Washington, DC, among other program benefits. 🔗 Get your eligibility form in at the link in our bio. This program received funding support from Hewlett Packard Enterprise Foundation and @KaiserPermanenteMidAtlantic and additional support from @AmazonWebServices , Inc. (AWS).

Only one week left to submit your eligibility form for our new Caribbean Climate Pre-Accelerator! In partnership with the Hazelwood Network, this program will serve climate leaders across the region through a one-week, in-person residency in Kingston, Jamaica, five virtual programming days, and a final half-week, in-person residency in Bridgetown, Barbados. ➡️ Learn more and apply at the link in our bio.

🌟Introducing Halcyon’s 2026 Climate Resilience & Food Security in Africa cohort.🌟  This program supports ventures strengthening climate adaptation and resilience and food security across the continent. These selected entrepreneurs will attend a one-week, in-person residency in Accra, Ghana next week, virtual programming, and a final one-week, in-person residency in Nairobi, Kenya. This program is run with support from @AmazonWebServices , Inc. (AWS).  Meet the founders and ventures at the link in our bio.  Thank you to our Selections Committee for their expertise and dedication in shaping this cohort:   • Ann-Elise Francis (Rippleworks)  • Yvan Gatoto, Claire Kelly, Stephanie Manciagli, Antony Mukiri, Tarisai Nyamandwe, Dianna Purcell, & Daniel Zoltani (Whole Foods Market Foundation)  • Benjamin Gyan-Kesse (Kosmos Innovation Center)  • Dawn Heisey-Grove & Samantha Neilson (AWS)  • Michael Kembo, Joram Mwinamo, & Lorraine Syumiti (SNDBX)  • Helen Manich (Manich Strategic)  • Alex Simuyandi (Emerald Africa Financing Facility)  • Jewel N. Thompson (Ashesi University)    @okumumilly , @esusfarmafrica , @ritkatmun_ , @green_edens , @greengiraffezambia , @ade_koyejo , @kamimtech , @musa_mishamo , @rada_space , @faith_kuya , @coster_edd , @safesip_co , @isaacsesi , @sesitechnologies , @tawifreshke