![Marc Horstman](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Marc Horstman
President at
NET POWER INC.
Net worth: 28 968 $ as of 31/05/2026
Profile
Marc Horstman is currently President & Chief Operating Officer at NET Power, Inc., with the title starting in 2026.
Formerly, Mr. Horstman was Senior Executive Vice President-Americas at Siemens Corp.
from 2017 to 2018 and Vice President-North America Service Operations at Vertiv Holdings Co. from 2021 to 2022.
Education includes an undergraduate degree from the University of Dayton.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 10/04/2026 | 14,412 ( 0.02% ) | 28 968 $ | 31/05/2026 |
Marc Horstman active positions
| Companies | Position | Start |
|---|---|---|
| NET POWER INC. | President | 04/03/2026 |
Former positions of Marc Horstman
| Companies | Position | End |
|---|---|---|
| VERTIV HOLDINGS CO. | Corporate Officer/Principal | 01/11/2022 |
Siemens Corp.
 Siemens Corp. Industrial MachineryProducer Manufacturing Manufactures industrial automation, digital infrastructure equipment and software products & solutions | Corporate Officer/Principal | 01/12/2018 |
Training of Marc Horstman
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
7
1st degree connections
4
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 4 |
|---|---|
Siemens Corp.
Siemens Corp. Industrial MachineryProducer Manufacturing Manufactures industrial automation, digital infrastructure equipment and software products & solutions | Producer Manufacturing |
University of Dayton
 University of Dayton Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Vertiv Holdings Co.
 Vertiv Holdings Co. Electronic Production EquipmentElectronic Technology Provides data center management products and services | Electronic Technology |
NET Power, Inc.
 NET Power, Inc. Electrical ProductsProducer Manufacturing Develops power generation technology equipment | Producer Manufacturing |
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