Historical Deals
Timeline of major public biochar CDR (BCR) offtakes with volumes, counterparties, and primary-source links. Research date 2026-09-14. Never invent prices or volumes—if a figure is only in secondary coverage, it is labeled.
Related: Buyers and Offtakes · Supply Landscape · Market Volumes and Pricing · Market Hub
How to use this table
- Prefer company / buyer press over trade press.
- CDR.fyi abridged posts summarize markets; they are excellent for aggregates but may omit unit prices and some registry fields.
- “Registry” column records what the primary release stated—blank means not disclosed there.
- This is not a complete CDR.fyi database dump (290+ purchasers; many <100 t deals omitted).
Major BCR deals timeline
| Announce (approx.) | Buyer | Seller / project | Volume | Term / delivery window | Registry / MRV (as stated) | Primary source |
|---|---|---|---|---|---|---|
| 2023-12-13 | Microsoft | Exomad Green — Concepción, Bolivia (via Carbonfuture) | >32,000 tCO₂e | On track to deliver by Jun 2024 | Puro Standard; Carbonfuture MRV+ | Carbonfuture |
| 2025-01-16 | Varaha (India) | 100,000 t biochar CDR | By 2030 | Not named in Google blog | Google blog | |
| 2025-01-16 | Charm Industrial (biochar pathway) | 100,000 t biochar CDR | By 2030 | Not named in Google blog | Same Google blog | |
| 2025-04-24 | Microsoft | Carba (Burnsville, MN landfill burial) | 44,000 credits | 5 years; retirements from 2025 | Isometric; 1,000-year durability; low-oxygen burial module | Carba; CDR.fyi alert |
| 2025-05-21 | Microsoft | Exomad Green — Concepción & Riberalta, Bolivia | ≥1.24 Mt | 10 years | Puro.earth Biochar Methodology; Carbonfuture MRV+ | Exomad Green |
| 2026-03-17 | AMP / Commonwealth Sortation (Virginia MSW → biochar) | 200,000 tCO₂e | By 2030 | Not named in AMP release | AMP | |
| 2026-03-23 | Altitude | Empacar S.A. (Bolivia biochar facilities) | >305,000 t CORCs | Multi-year; first issuance expected 2027 (secondary coverage; Altitude primary does not state 2027) | Puro.earth or equivalent | Altitude |
| 2026-03-24 | Microsoft | Liferaft (Iowa & Illinois) | 1,000,000 CRUs | 10 years (deliveries from 2026 per CDR.fyi) | “ICROA endorsed registry” (unnamed); Supercritical facilitated; MRV for approved end uses | Liferaft; Supercritical |
| 2026-04-16 | Supercritical → corporate buyers | Exomad Green | Up to 500,000 t | 3 years (2026 remaining inventory + 2027–2028 allocations) | Puro.earth biochar methodology | Supercritical; Exomad |
| Q1 2026 (tracker) | Undisclosed | Exomad Green (via Senken) | 105 kt | Q1 2026 contracted | Not specified in abridged post | CDR.fyi Q1 2026 |
Contextual notes on selected deals
Microsoft × Exomad Green (1.24 Mt)
- Largest BCR agreement by volume at announcement (May 2025); among largest durable CDR deals generally (Exomad claim).
- Builds on prior >32 kt relationship.
- Biomass: forestry residues that would otherwise be open-burned; biochar to local agricultural soils.
- Facilities: Concepción & Riberalta (expanded); third facility under construction at announcement time.
- Exomad goal cited: 1 Mt CO₂ / yr by 2027 (Exomad May 2025).
- Delivery share claim at announcement: 27% of durable CDR deliveries (CDR.fyi data cited by Exomad, Apr 2025 context).
Google × Varaha & Charm (100 kt each)
- Google called them “the largest biochar carbon removal deals to date” as of 16 Jan 2025 (Google blog)—later surpassed by Microsoft–Exomad and Microsoft–Liferaft.
- Adds biochar alongside EW, DAC, Frontier, and Symbiosis toolkit.
Google × AMP (200 kt)
- MSW organics recovered via AI sortation → biochar; initial use as landfill daily cover.
- Paired methane-framework work with Google.
- SPSA Virginia 20-year processing contract is the underlying project infrastructure (AMP release).
Microsoft × Liferaft (1 Mt)
- Largest US biochar offtake announced to date (coverage consensus; Liferaft primary emphasizes rural Midwest jobs + Microsoft carbon-negative goal).
- Biochar–compost mix for approved agricultural end uses.
- Second-largest BCR purchase historically per CDR.fyi Q1 2026 (~43.5% of that quarter’s contracted durable CDR).
Altitude × Empacar (>305 kt)
- Financier procurement of CORCs (not necessarily end-corporate retirement at signing).
- Bioflux cited as biochar program partner.
- Positions Bolivia as multi-supplier BCR hub alongside Exomad.
Supercritical × Exomad (up to 500 kt)
- Emphasizes near-term deliverable inventory vs long-dated promises.
- Extends partnership; Supercritical previously facilitated >100 kt of Exomad credits.
- Exomad claims >320 kt produced to date and >200% YoY production growth (Apr 2026 release).
Microsoft × Carba (44 kt)
- Storage pathway: low-oxygen burial / landfill cover—not classic soil amendment.
- First project on Isometric’s Biochar Storage in Low Oxygen Burial Environments module (CDR.fyi alert).
- DOE Carbon Negative Shot Pilot grant ($7M) referenced in Carba release.
Aggregates that are not single deals
| Aggregate | Figure | Source |
|---|---|---|
| Cumulative BCR contracted Q1 2022–H1 2025 | 3.04 Mt | Snapshot 2025 |
| Exomad share of BCR tonnes sold since 2022 | ~60% | Snapshot 2025 |
| Exomad cumulative tonnes sold after Q1 2026 deals | >2.35 Mt | Q1 2026 |
| Varaha cumulative tonnes sold | >500 kt | Q1 2026 |
| Q4 2024 multi-supplier burst | Exomad, Charm, Varaha, Carboneers, Aperam, Planboo “many thousands of tons each” | Snapshot 2025 (exact per-deal tonnes not in abridged body) |
Price column — intentionally empty
No unit prices for the megadeals above were found in the primary press releases fetched for this research. Do not back-solve $/t from market-value aggregates. For public €/t signals see Price Indexes and Benchmarks (CORCCHAR) and Market Volumes and Pricing.
Gaps
- Hundreds of sub-100 t deals omitted.
- Confidential buyers.
- Exact registry serials / project IDs for several Google deals.
- Take-or-pay, optionality, and penalty schedules.
- Updates after Q1 2026 for delivery against these offtakes.
Primary links
- CDR.fyi Snapshot 2025
- CDR.fyi Q1 2026
- Deal press URLs in the timeline table above · Key Sources
See also
Buyers and Offtakes · Supply Landscape · Market Volumes and Pricing · Durable CDR Quality Tiers · Puro.earth Overview · Isometric Biochar Protocol · Verra VM0044 · Risks and Controversies · Market Hub · Key Sources