Data Subscriptions Overview

Data Subscriptions are Halcyon's continuously updated, structured datasets — called Trackers — that distill primary-source regulatory filings into analysis-ready market intelligence. Instead of reading filings one at a time, you get a comprehensive, asset-level view of an entire energy buildout in a single dataset.

Each Tracker is collated from authoritative sources nationwide, maintained by the Halcyon team, refreshed on a monthly basis, and delivered with source-linked citations so you can verify any data point against the original filing.

A multi-state, centralized feed of planned U.S. gas-fired assets — asset-level technology, timelines, prices, and changes over time. Current scale: ~278 plants / ~167 GW of capacity. U.S. gas-fired plant costs have roughly tripled this decade, making a single source of truth on planned capacity especially valuable.

Who uses it: investors gauging feasibility and asset value; utilities tracking output and compliance; equipment manufacturers forecasting demand and lifecycles; and energy traders/analysts monitoring supply-demand and price dynamics.

Learn more about the specific information in the Gas Power Plant Tracker

A catalog of large-load tariffs — the specialized electricity rate structures designed for high-demand customers like data centers, used to allocate costs equitably, maintain grid stability, and manage risk. Current scale: ~161 tariffs, including data center–specific designs you can benchmark against peer structures.

Who uses it: data center developers comparing costs and siting; utilities benchmarking and streamlining tariff approval; law firms analyzing prior proposals and comments; and consultants advising on the fast-moving tariff landscape.

Learn more about the specific information in the Large Load Tariff Tracker

Key metrics from rate cases submitted by investor-owned utilities (IOUs) across the country. Current scale: ~289 rate cases covering ~84M utility customers. Useful for early warning on rate-design changes and for benchmarking filings against peer outcomes.

Who uses it: investors assessing authorized vs. requested ROEs and earnings potential; utilities benchmarking filings; law firms preparing arguments and monitoring ROE precedent; and consultants spotting emerging methodologies.

Learn more about the specific information in the Rate Case Tracker

Planned U.S. utility-scale storage, asset by asset, with technology, timelines, prices, and changes. Current scale: ~790+ systems representing ~345 GWh, including co-located solar-plus-storage projects competing for the same grid capacity.

Who uses it: investors finding new opportunities and counterparties; utilities benchmarking projects and supply-chain trends; developers identifying siting opportunities and interconnection timelines; and traders/analysts tracking deployments that influence net load and arbitrage.

Learn more about the specific information in the Battery Energy Storage System Tracker

A view into the grid build-out that determines when and where capacity unlocks. Current scale: ~4,370+ projects informing new substation development across CAISO, MISO, Northern Grid, PJM and WestConnect in addition to the ERCOT market..

Who uses it: equipment manufacturers improving demand forecasting; utilities monitoring proposed substations and supply-chain trends; developers planning around regional capacity and long-lead-time items; and investors/finance validating supply-chain theses and tracking deployment against demand growth.

Learn more about the specific information in the New Substation Development Tracker

Beyond the five core Trackers, Halcyon produces focused datasets on emerging topics. New Data Subscriptions are regularly in development; if you don't see what you need, reach out and tell us what's important to you.

For step-by-step instructions on exporting and working with your subscription data, see Downloading Data Subscriptions.

Request access or pricing through halcyon.io/data-subscriptions or your Halcyon contact.

Got questions or feedback about this page? support@halcyon.io