Third Sphere | Activity | F4

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Team Portfolio Raise Champions Essays

F4/Third Sphere/Activity

Third Sphere Activity

Every public signal F4 has attached to this firm, with sources and cross-entity links.

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News

Stanford Graduate School of Business published a case study on Third Sphere's approach to climate-focused venture investing across four portfolio generations.

Stanford GSB Case Study: Third Sphere Impact in Transition

gsb.stanford.edu

Added recently

Essay

Published the 2025 Portfolio Impact Report documenting 45M tonnes CO2e avoided and 300M+ lives protected across the portfolio, built with AI assistance and anchored in the firm's Speedstrapping methodology.

2025 Third Sphere Portfolio Impact Report

thirdsphere.comJUL 2026

JUL 2026

Essay

Essay on how stretchable nylon is solving fashion's biggest recycling problem through circular economy solutions.

Why We Invested in Return To Vendor

thirdsphere.substack.comAPR 2026

APR 2026

Investment

Invested in Return To Vendor (RTV), which engineers infinitely recyclable single-material nylon to replace unrecyclable blended stretch fabrics.

Return To Vendor

Return To Vendor Third Sphere

thirdsphere.substack.comMAR 2026

MAR 2026

Essay

Annual impact report showing 45M tonnes CO2e avoided and 300M+ lives protected across portfolio over 12 years.

2025 Third Sphere Portfolio Impact Report

thirdsphere.comFEB 2026

FEB 2026

Investment

Invested in Focal, which electrifies personal heating to reduce energy consumption.

Focal

Focal Third Sphere

thirdsphere.substack.comNOV 2025

NOV 2025