Mast Reforestation Sells Out First Batch of Biomass-Burial Carbon Credits

Seattle-based Mast Reforestation announced in April 2026 that it has sold out all 4,277 credits in its first biomass-burial carbon-removal issuance, a milestone that validates a new model for financing forest restoration after wildfires. The credits were issued under the Puro.earth registry and purchased by Bain & Company, BMO and RBC, among other buyers.

Mast's approach starts on land where severe fires have killed trees that no longer store carbon reliably, such as the area burned by the Poverty Flats Fire in Montana. The company removes the dead biomass, buries it in engineered pits that slow decomposition, and then replants the forest with native species suited to the future climate. Each ton of carbon locked below ground is verified and issued as a credit, while the replanted forest regrows to draw down more CO₂ over time.

Founder and CEO Grant Canary says combining burial with reforestation is what makes the model durable: the wood under the ground is measurable and long-lived, while the new trees restore ecosystems and cool the landscape. Puro.earth, a leading carbon-removal registry, verifies each batch against its MT1 methodology, giving corporate buyers confidence that the carbon is really being removed from the atmosphere.

The sellout comes as Mast Reforestation was named one of Fast Company's Most Innovative Companies of 2026. It also signals rising demand from large firms for high-quality removal credits, rather than cheaper avoidance offsets that have drawn increasing scrutiny. If the model scales, vast areas of fire-damaged Western forest could become not only recovering ecosystems but also a measurable part of the climate solution.