Carbon removal purchases fell 65% in Q3 from the previous quarter, and enhanced rock weathering accounted for 84% of volume, according to new research reported by Carbon Pulse. For buyers, developers and investors, the signal is not only weaker demand but sharper concentration: durable carbon removal spending is narrowing toward a smaller set of methods at the same time as total purchasing activity contracts.
The Q3 Signal: Fewer Tonnes, More Method Concentration
The headline figures are stark. Purchases were down 65% quarter on quarter, while enhanced rock weathering made up 84% of volume, per Carbon Pulse. That combination points to a market where overall appetite cooled, but the transactions that still happened clustered heavily in one removal pathway.
For procurement teams, that changes the practical reading of demand. A falling purchase total suggests caution, slower contracting or delayed decisions. An 84% share for enhanced rock weathering suggests that when buyers did commit, they favored a method that currently sits inside their risk, price or permanence thresholds.
A Market Still Small Relative to Ambition
The contraction lands in a durable removal market that remains young. CDR.fyi describes its portal as tracking cumulative and quarterly tonnes purchased and delivered across methods, with transactions, pricing shifts and delivery milestones structured and searchable. Its dashboard shows 50.5 million tonnes cumulatively contracted, 1.7 million tonnes cumulatively delivered, a weighted average price of $343 per tonne and 336 orders per quarter.
Those figures frame why a 65% quarterly drop matters. The gap between contracted and delivered tonnes is already wide, so a slowdown in new purchases can ripple forward into future delivery schedules, supplier financing and portfolio planning. Buyers that want delivery certainty may find the market less forgiving if new commitments hesitate while outstanding orders still need to be fulfilled.
Enhanced Weathering Had Corporate Tailwinds Before the Drop
The Q3 concentration in enhanced rock weathering did not appear in isolation. Sylvera reports that Alphabet, the parent of Google, moved to third place at 3.46 million tonnes after Q3 announcements of major enhanced weathering and rice emission reduction offtakes with Terradot and Mitti Labs. That does not explain the whole market, but it shows large buyers were still willing to sign sizeable enhanced weathering deals during the quarter.
For suppliers, the implication is mixed. A method with an 84% share can look like momentum, but heavy dependence on one pathway also raises portfolio risk if buyer preferences shift, measurement expectations tighten or project economics change. For investors, concentration can reduce diversification even where demand quality looks strong.
Wider Carbon Demand Was Also Under Pressure
The removal slowdown fits a broader cooling pattern in carbon market demand indicators. Sylvera reports that carbon credit retirements reached 30.6 million in Q3 2026, down 9% from 33.7 million in the same period last year. Among disclosed offtakes, announced volumes fell 53% year on year to 32.7 million tonnes in year to date 2026, from 70 million tonnes, while total value dropped 65% to $3.48 billion from $9.96 billion.
Those are different metrics from durable CDR purchases, so they should not be merged into one trend line. Still, they point in the same direction: less announced demand, lower disclosed value and fewer retirements than comparable periods. In that setting, a 65% fall in carbon removal purchases looks less like a niche blip and more like part of a broader reset in how buyers pace commitments.
What Buyers and Developers Should Watch Next
The first marker is whether Q4 purchasing rebounds or confirms a new lower tempo. A single quarter can be distorted by timing, but a second weak quarter would force reassessment of near term revenue for removal suppliers and of delivery risk for buyers with net zero deadlines.
The second marker is method share. Enhanced rock weathering holding 84% of volume in a down quarter raises questions about price discovery, MRV confidence and supplier capacity. Watch whether future purchases broaden across biochar, mineralization, biomass storage, direct air capture or ocean pathways, or whether concentration hardens further.
The third marker is conversion from contract to delivery. CDR.fyi shows contracted tonnes far above delivered tonnes. If purchases stay weak while deliveries rise, the backlog narrows. If purchases recover before delivery capacity matures, buyers may face longer queues and firmer pricing. Either way, Q3 has made the durable removal market’s central question sharper: not only how much demand exists, but how concentrated it has become.
