Company Description
Vast Renewables Ltd (VSTTF), referred to as "Vast", is described as an Australian on-demand renewable energy and clean fuels platform. According to company disclosures, Vast focuses on delivering carbon-free heat and power at utility scale, with an emphasis on enabling decarbonisation of the electricity grid, supporting green fuels production, and serving hard-to-abate industrial sectors.
The company highlights its proprietary concentrating solar thermal power ("CSP") technology as a core part of its platform. Vast characterises this technology as differentiated and designed to provide 24/7 carbon-free heat and power. By combining CSP generation with long-duration thermal energy storage, Vast aims to provide dispatchable renewable energy rather than only intermittent output.
Port Augusta Green Energy Hub and VS1
A central project for Vast is the Port Augusta Green Energy Hub in South Australia. Within this hub, the company is developing its flagship utility-scale long duration energy storage project known as Vast Solar 1 ("VS1"). VS1 is described as a 30MW CSP plant located in Port Augusta, South Australia, using Vast’s modular tower CSP v3.0 technology. The project is intended to generate clean, low-cost, dispatchable power with 10 hours of thermal energy storage.
Vast reports that VS1 has secured conditional support from the Australian Government, including a grant from the Australian Renewable Energy Agency ("ARENA"). The company positions VS1 as a key step in demonstrating its next generation CSP solution at utility scale, and as part of a broader effort to accelerate Australia’s energy transition.
The Port Augusta Green Energy Hub also includes a 140MW, 2-hour lithium-ion battery project. Vast states that this battery is being developed in partnership with clean energy storage technology company 1414 Degrees. According to the company, this battery project is intended to provide storage capacity and support grid stability alongside the CSP facility.
Business Focus and Technology
Vast describes itself as a platform for on-demand renewable energy and clean fuels, built around proprietary CSP technology. The company emphasises that its technology is designed to deliver carbon-free heat and power around the clock at utility scale. This focus on dispatchable renewable energy is presented as a way to support grid reliability and to enable applications that require continuous or process heat, such as green fuels production and industrial uses.
By pairing CSP generation with thermal energy storage, Vast aims to address the challenge of matching renewable generation with demand. The company’s description of its activities indicates a focus on large-scale projects and long-duration storage, rather than only short-duration or small-scale systems.
Capital Raising and Investor Support
Vast has announced the placement of convertible notes with two of its largest and longest-standing investors, Nabors Industries and Canberra Airport Group. The company states that the proceeds from these convertible notes are intended to support the delivery of the Port Augusta Green Energy Hub, including VS1, and to advance its international project pipeline. Vast refers to this funding as part of a broader capital raise involving institutional and strategic investors.
According to the company, this investment reflects investor confidence in its CSP technology and its readiness to progress major projects such as VS1. Vast also notes that it is actively engaging with long-term investors and strategic partners to secure additional financial support for its project portfolio.
Role in Energy Transition
In its own description, Vast links its activities to the broader energy transition, particularly in Australia. The company presents its CSP-based platform and associated projects as tools to accelerate the shift to carbon-free energy by providing dispatchable renewable power and heat. It also highlights the potential application of its technology in green fuels production and in sectors that are more difficult to decarbonise using conventional renewable generation alone.
Through projects like VS1 and the Port Augusta Green Energy Hub, Vast positions itself as working at the intersection of renewable generation, energy storage, and clean fuels. Its disclosures emphasise long-duration storage, utility-scale deployment, and the use of proprietary CSP technology as defining features of its business.
Corporate and Shareholder Information
Vast Renewables Ltd trades under the symbol VSTTF on the over-the-counter (OTC) market. The company has indicated that it holds annual general meetings (AGMs) for shareholders and publishes annual financial statements for its financial year. These materials are used to provide updates on project progress, financial performance, and the outlook for its CSP solutions and project pipeline.
While detailed segment reporting or geographic breakdowns are not provided in the available information, the company’s descriptions focus on its Australian base, its CSP technology platform, and its pipeline of utility-scale renewable and storage projects.
Key Themes for Investors and Observers
- Focus on on-demand renewable energy and clean fuels.
- Use of proprietary concentrating solar thermal power technology.
- Development of utility-scale projects with long-duration thermal energy storage.
- Flagship VS1 CSP plant within the Port Augusta Green Energy Hub in South Australia.
- Integration of CSP with battery storage in partnership projects.
- Capital raising through instruments such as convertible notes to fund project development.
These elements summarise how Vast Renewables Ltd presents its business model and strategic focus based on the available company statements.
Stock Performance
Vast Renewables (VSTTF) stock last traded at $0.0011. Over the past 12 months, the stock has lost 98.9%. At a market capitalization of $33.0K, VSTTF is classified as a micro-cap stock with approximately 30.0M shares outstanding.
Latest News
Vast Renewables has 1 recent news article. Of the recent coverage, 1 article coincided with positive price movement and 0 with negative movement. View all VSTTF news →
SEC Filings
Vast Renewables has filed 1 recent SEC filing, including 1 Form SCHEDULE 13G/A. The most recent filing was submitted on October 1, 2025. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all VSTTF SEC filings →
Financial Highlights
Vast Renewables generated $342K in revenue over the trailing twelve months, and net income was -$293.4M, reflecting a -85802.6% net profit margin. The company generated -$40.3M in operating cash flow. With a current ratio of 1.35, the company maintains adequate short-term liquidity.
Upcoming Events
VS1 Financial Close
Vast Renewables has 1 upcoming scheduled event. The next event, "VS1 Financial Close", is scheduled for March 31, 2026 (in 10 days). 1 of the upcoming events are financial in nature, such as earnings calls or quarterly results. Investors can track these dates to stay informed about potential catalysts that may affect the VSTTF stock price.
Short Interest History
Short interest in Vast Renewables (VSTTF) currently stands at 110.6 thousand shares, representing 0.6% of the float. Over the past 12 months, short interest has decreased by 62.3%. This relatively low short interest suggests limited bearish sentiment. With 52.8 days to cover, it would take significant time for short sellers to close their positions based on average trading volume.
Days to Cover History
Days to cover for Vast Renewables (VSTTF) currently stands at 52.8 days, up 290.2% from the previous period. This elevated days-to-cover ratio indicates it would take over two weeks of average trading volume for short sellers to exit their positions, suggesting potential for a short squeeze if positive news emerges. The days to cover has increased 5180% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.0 to 52.8 days.
VSTTF Company Profile & Sector Positioning
Vast Renewables (VSTTF) operates in the Solar industry within the broader Technology sector and is listed on the OTC Link.