Stephanie Unwin Biography and Net Worth

Director of Energy Vault

Stephanie Unwin is the Chief Executive Officer of Arc Infrastructure, a rail freight network manager operating more than 5,000 kilometers of rail across Western Australia. She joined Arc Infrastructure in 2025. With over 30 years of experience spanning the energy, biotech, commodities, and legal sectors, Stephanie brings a strong track record in infrastructure leadership and in supporting regional development and local communities.

Prior to joining Arc Infrastructure, Stephanie was the CEO of Horizon Power, Western Australia’s regional energy provider. Stephanie has held senior leadership roles at CBH Group and Synergy. She was the CEO of listed biotech, Phylogica; and has held a number of directorships of Australian, USA and Toronto Stock Exchange-listed companies.

Stephanie has a Bachelor of Law and a Bachelor of Economics from Murdoch University and is a graduate of Harvard Business School – Advanced Management Program 191. She was admitted to the Bar in Western Australia and is a Graduate Member of the Australian Institute of Company Directors.

What is Stephanie Unwin's net worth?: The estimated net worth of Stephanie Unwin is at least $621.46 thousand as of August 26th, 2026. Unwin owns 182,245 shares of Energy Vault stock worth more than $621,455 as of August 31st. This net worth approximation does not reflect any other assets that Unwin may own. Learn More about Stephanie Unwin's net worth.
How do I contact Stephanie Unwin?: The corporate mailing address for Unwin and other Energy Vault executives is 8556 OAKMONT LANE, INDIANAPOLIS IN, 46260. Energy Vault can also be reached via phone at 805-852-0000 and via email at [email protected]. Learn More on Stephanie Unwin's contact information.
Has Stephanie Unwin been buying or selling shares of Energy Vault?: Within the last three months, Stephanie Unwin has sold $426,650.00 in Energy Vault stock. Most recently, Stephanie Unwin sold 115,000 shares of the business's stock in a transaction on Wednesday, August 26th. The shares were sold at an average price of $3.71, for a transaction totalling $426,650.00. Following the completion of the sale, the director now directly owns 182,245 shares of the company's stock, valued at $676,128.95. Learn More on Stephanie Unwin's trading history.
Who are Energy Vault's active insiders?: Energy Vault's insider roster includes Laurence Alexander (CMO), Michael Beer (CFO), Thomas Ertel (Director), Theresa Fariello (Director), Dylan Hixon (Director), Goncagul Icoren (Insider), Akshay Ladwa (Insider), Robert Piconi (Co-Founder), Robert Piconi (CEO), Marco Terruzzin (Insider), Stephanie Unwin (Director), and Christopher Wiese (Insider). Learn More on Energy Vault's active insiders.
Are insiders buying or selling shares of Energy Vault?: In the last twelve months, Energy Vault insiders bought shares 8 times. They purchased a total of 207,440 shares worth more than $679,340.18. In the last twelve months, insiders at the sold shares 8 times. They sold a total of 3,495,000 shares worth more than $18,678,050.00. The most recent insider tranaction occured on August, 26th when Director Stephanie Unwin sold 115,000 shares worth more than $426,650.00. Insiders at Energy Vault own 17.2% of the company. Learn More about insider trades at Energy Vault.
Information on this page was last updated on 8/26/2026.

Stephanie Unwin Insider Trading History at Energy Vault

Transaction Date	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction	Details
8/26/2026	Sell	115,000	$3.71	$426,650.00	182,245

Stephanie Unwin Buying and Selling Activity at Energy Vault

Energy Vault Company Overview

Energy Vault Holdings, Inc. develops and sells energy storage solutions. The company offers B-Vault, an electrochemical battery energy storage systems for shorter-duration energy storage needs; G-Vault, a proprietary gravity energy storage solution, including EVx solution; and H-Vault, a hybrid energy storage systems including systems that integrate green hydrogen. Its software solutions includes Vault-OS, an energy management system the management of one or more diverse storage mediums; Vault-Bidder that utilizes machine learning algorithms to match node-specific data with real-time weather and asset performance information; and Vault-Manager which designs to safeguard asset management and to help blend developing technologies seamlessly into existing solutions. Energy Vault Holdings, Inc. is based in Westlake Village, California.

Today's Range

Now: $3.41

$3.37

$3.52

50 Day Range

MA: $3.58

$2.51

$4.70

2 Week Range

Now: $3.41

$1.73

$6.64

Volume

2,713,074 shs

Average Volume

4,569,037 shs

Market Capitalization

$620.07 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.21