Thomas Ertel Biography and Net Worth

Director of Energy Vault

Thomas Ertel has been a member of our Board of Directors since 2022.He was a Partner at Ernst & Young, LLP, an accounting firm, from June 2002 until his retirement from full-time employment in June 2017. Prior to that, Mr. Ertel spent 25 years, including 13 years as Partner, with Arthur Andersen, LLP, an accounting firm. Since October 2017, Mr. Ertel has served as Senior Vice President and Chief Accounting Officer of Strada Education Network, a nonprofit organization that strengthens America’s pathways between education and employment. From December 2017 through September 2021, he served as a director on the board of directors of Blackbaud, Inc. He holds a BS in Accounting from Ball State University and has maintained an active CPA license in the State of Indiana since 1980. We believe Mr. Ertel is well qualified to serve as a director because of his management skills and because of his knowledge and experience in accounting and corporate transactions.

What is Thomas R. Ertel's net worth?: The estimated net worth of Thomas R. Ertel is at least $1.27 million as of March 4th, 2026. Ertel owns 365,788 shares of Energy Vault stock worth more than $1,267,455 as of March 17th. This net worth approximation does not reflect any other assets that Ertel may own. Learn More about Thomas R. Ertel's net worth.
How do I contact Thomas R. Ertel?: The corporate mailing address for Ertel 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 Thomas R. Ertel's contact information.
Has Thomas R. Ertel been buying or selling shares of Energy Vault?: During the past quarter, Thomas R. Ertel has bought $18,366.50 of Energy Vault stock. Most recently, on Wednesday, March 4th, Thomas R. Ertel bought 5,450 shares of Energy Vault stock. The stock was acquired at an average cost of $3.37 per share, with a total value of $18,366.50. Following the completion of the transaction, the director now directly owns 365,788 shares of the company's stock, valued at $1,232,705.56. Learn More on Thomas R. Ertel'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), 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 11 times. They purchased a total of 159,350 shares worth more than $373,191.50. In the last twelve months, insiders at the sold shares 15 times. They sold a total of 3,498,962 shares worth more than $17,972,129.13. The most recent insider tranaction occured on March, 4th when Director Thomas R Ertel bought 5,450 shares worth more than $18,366.50. Insiders at Energy Vault own 19.8% of the company. Learn More about insider trades at Energy Vault.
Information on this page was last updated on 3/4/2026.

Thomas R. Ertel Insider Trading History at Energy Vault

Transaction Date	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction	Details
3/4/2026	Buy	5,450	$3.37	$18,366.50	365,788
8/28/2025	Buy	11,200	$1.81	$20,272.00	199,206

Thomas R. Ertel 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: $3.51

$3.42

$3.58

50 Day Range

MA: $4.25

$2.99

$6.04

2 Week Range

Now: $3.51

$0.60

$6.35

Volume

5,452,997 shs

Average Volume

3,506,268 shs

Market Capitalization

$588.27 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.98