Participated · Seed · Mar 2026

Helix Earth Technologies, founded in 2022 and spun out of Rice University, builds hardware rooted in proprietary liquid-gas chemistry and aerospace technology co-invented at NASA to address energy efficiency and humidity control in commercial HVAC and adjacent markets. The company is developing a retrofit add-on that separates temperature management from moisture control and targets a large portion of the estimated $150 billion commercial air conditioning market. Helix has been incubated at Greentown Labs since 2023 and has received a Phase II SBIR from the NSF plus grants from the U.S. Department of Energy. With $12 million raised in an oversubscribed Seed 2 round led by Veriten, Helix plans to scale manufacturing and accelerate deployment of its first product. The company has attracted industry attention and awards, including Cleantech 50 to Watch and first place in the 2025 SXSW Pitch competition, positioning it to pursue broader industrial filtration and CO2 capture opportunities.

Participated · Equity · Dec 2025

Haven Energy is a Los Angeles-based energy technology company that aggregates battery-based distributed energy resources (DERs) across residential and small commercial & industrial sites to build large-scale virtual power plants (VPPs). Its platform installs and manages behind-the-meter storage that can be dispatched to support grid stability and utility-run demand response programs. To date, Haven has installed more than 10 MW of distributed capacity and has over 50 MW slated for development in 2026, underpinning a project pipeline valued at more than $75 million. Existing utility and community choice aggregator partners include EPRI, Clean Power Alliance, San Jose Clean Energy, Clean Energy Alliance, and Peninsula Clean Energy. The company plans to deepen these partnerships while expanding a leasing model and Channel Partner Program targeting local installers. Proceeds from the latest financing will help accelerate these initiatives and scale its VPP footprint nationwide.

Participated · Series A · Jan 2024

Nest Collaborative operates a telehealth platform that offers lactation support, delivering acute and preventive care as well as prenatal and postpartum education. The service is available 365 days a year and has delivered over 50,000 consultations to date. Its services are covered by more than 250 insurance plans, minimizing out-of-pocket costs for most national payers. The company also partners with health systems, hospitals, and practice groups to complement care from OB-GYNs, midwives, and pediatricians and to bridge care between providers and families. Nest Collaborative will use the new capital to scale operations, expand into new markets, and continue advancing its offering. The company has raised over $10 million in total funding to date. Nest Collaborative operates a virtual lactation consultation platform connecting mothers with a nationwide network of lactation consultants. Led by CEO Amanda Gorman, the service offers 24/7 virtual consultations and connects moms to a consultant within hours. Services are covered by most national payers, providing mothers a no-cost, insurance-paid experience while Nest handles payment and paperwork on the back end. The company has quickly scaled to serve thousands of moms and babies across the country. Nest plans to use new funding to scale its team, expand breastfeeding support offerings, increase marketing and partnerships, and grow its technological capabilities.

Participated · Equity · Apr 2021

Persefoni is a Sustainability Management SaaS and AI platform serving companies and financial institutions. Its product lineup includes Persefoni Pro, a free self-guided offering for SMBs and supply-chain participants launched in March 2024 that has seen more than 6,000 organic sign-ups. The company is expanding its AI suite—PersefoniGPT and smart emission factor matching—and reports model breakthroughs in energy and utility bill management and physical risk modeling, with commercial products expected in 2025. Planned 2025 product releases include a dedicated Product Carbon Footprint/LCA capability, enhanced audit and controls, and a self-serve analytics builder. Persefoni has broadened from a pure enterprise model to include successful self-service offerings and has expanded Persefoni Pro to offer free multi-framework sustainability reporting in addition to carbon accounting. Management expects the recent progress and financing to carry the business toward profitability as early as the second half of 2025. Persefoni offers a Climate Management & Accounting Platform that helps businesses, financial institutions, and governmental agencies manage climate-related data, disclosures, and performance. Its software simplifies carbon footprint calculations, identifies decarbonization strategies, and performs climate trajectory modeling aligned to Paris Agreement temperature scenarios. The platform also enables benchmarking by region, sector, and peer group. The company has launched PersefoniGPT, an AI co-pilot product for carbon accounting and management, expanding its AI capabilities. Persefoni serves enterprise and financial-institution customers and emphasizes regulatory and disclosure workflows. Financially, the company has raised over $150 million to date, reflecting investor interest in its product and market opportunity. Persefoni offers an "ERP for Carbon Data" that automates carbon accounting and helps organizations comply with standards such as the Greenhouse Gas Protocol and PCAF. Its platform targets asset managers, banks, insurers, pensions/endowments and corporates across manufacturing, agriculture, energy, apparel, retail, software and business services. The company emphasizes avoiding proprietary methodologies to ensure auditability and claims automated accounting without consulting services. Persefoni has strategic partnerships with Bain & Co., EDF and SMBC, has expanded into the Japanese market, launched a free-tier for SMBs and introduced a Temperature Scoring Model for 1.5C/2C implied temperature scenarios. It also integrates with the Patch offsetting platform on a commission-free, pass-through basis. Financially, the company recently completed a Series B and has raised a total of $114.2 million to date. Persefoni builds a carbon accounting and management platform that assembles, calculates, manages and reports organizational carbon footprints with real-time reporting on scope 1 through 3 emissions. The company was founded only last January and launched its product in August alongside an initial $3.5M raise. Persefoni has attracted corporate customers, with private equity firms like TPG signing on to its service. The startup recently added Robert G. Eccles, founding chairman of the Sustainability Accounting Standards Board, to its board of advisors. It plans to use new funding to support international expansion, product development, and recruitment. Persefoni develops an AI-powered carbon footprint management platform that generates business-centric sustainability reports and automates organizational emissions accounting. The company was founded in January by Jason Offerman, Kentaro Kawamori and Kim Stroh and is based in Tempe, Arizona. Persefoni plans to use its seed funding to continue product development, add features for large customers, expand its team beyond an 18-employee base, and pursue a Series A. The company said full availability of the platform will come in the fourth quarter and that it anticipates several million in sales by the end of the year. Persefoni positions itself against consumer and enterprise alternatives such as Klima, Salesforce Sustainability Cloud and SAP’s Climate 21 products, viewing some as competitors and others as potential partners. The platform emphasizes serving clients that are already serious about sustainability and meeting institutional investor demand for annual sustainability reports.