Firm Gas in ERCOT Is a Fifteen-Counterparty Market

The earlier Briefs established how much firm gas ERCOT can actually deliver this cycle (8.8 GW, merchant, signed, in service by 2028) and where it sits (60 percent in West Texas). This one is about who holds it, because the answer changes how the power should be bought.

The seller set is countable, and it is concentrated

The 8.8 GW deliverable set is held by roughly fifteen legal counterparties. Combine the entities that share a parent, and it is closer to eleven developers. That alone is a thin market. The concentration inside it is the part that matters:

• The top five developers hold about 80 percent of the deliverable set.
• The top three hold about 57 percent.
• The single largest developer holds about 28 percent of all the deliverable firm gas in ERCOT.

This is not a field of fifteen comparable sellers. It is a handful of majors and a tail of small positions. A buyer who needs a gigawatt is not shopping a market. They are negotiating with two or three counterparties who know exactly how scarce their position is.

Why concentration changes the price mechanism

In a deep market, price discovery happens through competition: enough sellers, and the clearing price is the marginal cost of the next unit. That mechanism does not exist here. With eleven developers holding the entire deliverable set and five of them holding most of it, there is no deep field of marginal sellers to set a competitive clearing price. Each large holder has pricing power over its own committed, near-term capacity closer to a price-maker's than a price-taker's. A buyer is not without alternatives, self-build, behind-the-meter generation, another zone, or simply waiting, and those options cap what a holder can charge. But within the signed, near-term, deliverable set, the leverage sits with the seller.

That means the price of firm gas is not a spread over a fuel cost. It is an option value. The seller is holding a scarce, expiring asset (a signed interconnection agreement with a near-term date) and pricing the optionality of waiting for a better counterparty. The buyer is paying for certainty and speed, not for energy. Treating this as a commodity procurement, and waiting for competitive tension that a countable seller set will not generate, is how a large load arrives at COD without contracted supply.

What this changes for the buyer

Hyperscaler energy leads. Procurement here is origination, not sourcing. The deliverable seller set is nameable and short, so the work is relationship coverage across the top five developers and moving early against them, before a competitor locks the same two or three counterparties. Price the option value of a signed, near-term position, and secure it, rather than modeling a clearing price that this market structure cannot produce.

Infra funds underwriting a gas platform. Concentration is the thesis and the risk at once. A platform that holds one of the top five positions owns real pricing power over a scarce, committed set. A platform built on the tail owns optionality that a larger holder can undercut on timing. Diligence where in the concentration curve the target sits, not just its nameplate.

Developers holding a top-five position. The scarcity is yours to price. As financial-security requirements and turbine-slot constraints thin the field further, the value of a committed, near-term position rises against the speculative queue around it.

The asset is the option to say no to the wrong counterparty, and it is worth more than the energy.

Methodology

The deliverable set is the 8.8 GW of ERCOT gas that is merchant, holds a signed interconnection agreement, and targets a 2026 to 2028 in-service date, drawn from the June 2026 GIS Report and reconciled against that immutable source before publication. Counterparty counts are developer entities in the report's Interconnecting Entity field; parent-level counts combine entities that share a common owner (for example, sequentially numbered project companies from one developer), assigned manually by matching project-company names rather than from a commercial ownership database. Concentration shares are by capacity. Merchant excludes cooperatives, municipal utilities, and public authorities. The earlier overlap Brief referred to roughly fifteen developers as shorthand; on entity reconciliation the precise figures are about fifteen legal counterparties and eleven parent developers. Because the 8.8 GW figure is derived from multiple filters applied to ERCOT GIS fields, it should be read as Tafel Power's filtered estimate of merchant, signed, near-term gas capacity, not as an ERCOT-published category. Figures reflect the June 2026 snapshot and may have changed since.

All data compiled by Tafel Power from public sources. Framing informed by the firm's transaction advisory work in ERCOT and cross-ISO markets.