![Ralph Gustavo Rosenberg Whitaker Carneiro](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>)
Net worth: 3 M $ as of 2026-07-30
Ralph Gustavo Rosenberg Whitaker Carneiro is the founder of Perfin Infra Administração de Recursos Ltda., founded in 2007, where the title held is Chief Investment Officer.
Mr. Rosenberg Whitaker Carneiro is the founder of Perfin Administração de Recursos Ltda., founded in 2007, holding the title of Founding Partner.
Current jobs include Director at EDTE - Empresa Diamantina de Transmissao de Energia SA, TSM - Transmissora Serra da Mantiqueira SA, Mori Energia Holding SA, Gemini Energy SA, Comerc Energia SA, Companhia Riograndense de Saneamento - Corsan, Cosan SA (since 2025), Compass Gás e Energia SA (since 2026), and RUMO SA (since 2025).
Former jobs include Director at Alupar Investimento SA and Casa dos.
Ventos Energias Renováveis SA. Education includes undergraduate studies at Fundação Escola de Comércio Álvares Penteado.
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
COSAN S.A. 0.11% | 2026-03-17 | 4,251,582 ( 0.11% ) | 3 M $ | 2026-07-30 |
| Companies | Position | Start |
|---|---|---|
| COMERC ENERGIA S.A. | Director/Board Member | - |
| COSAN S.A. | Director/Board Member | 2025-11-18 |
| RUMO S.A. | Director/Board Member | 2025-11-18 |
| COMPASS GAS E ENERGIA S.A. | Director/Board Member | 2026-04-28 |
Perfin Administração de Recursos Ltda.
 Perfin Administração de Recursos Ltda. Investment ManagersFinance Perfin is an active, fundamental research-intensive manager which aims to provide consistent returns and preserve capital over the long-term, based on fundamental analysis of assets, strict risk controls, transparency in their processes and ethical principles. The firm constructs concentrated, high conviction portfolios based on quantitative and qualitative analysis. They continuously monitor and analyze invested assets and manage risk to identify the optimal relationship between risk and return of each investment. | Chief Executive Officer | 2006-12-31 |
Perfin Administração de Recursos Ltda. /Private Equity/
 Perfin Administração de Recursos Ltda. /Private Equity/ Investment ManagersFinance Functions as an alternative investment manager | Founder | 2007-08-31 |
Mori Energia Holding SA
 Mori Energia Holding SA Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | - |
Gemini Energy SA
 Gemini Energy SA Electric UtilitiesUtilities Operates an energy transmission company | Director/Board Member | - |
TSM - Transmissora Serra da Mantiqueira SA
 TSM - Transmissora Serra da Mantiqueira SA Alternative Power GenerationUtilities Provides electric utility services | Director/Board Member | - |
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Active
Inactive
Listed companies
Private companies
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
| Private companies | 14 |
|---|---|
Cia Riograndense de Saneamento (Corsan)
 Cia Riograndense de Saneamento (Corsan) Engineering & ConstructionIndustrial Services Provides constructions, operations, exploration and expansion of public drinking water supply and sewage services | Industrial Services |
Cosan SA
 Cosan SA Gas DistributorsUtilities Engages in manufacturing of sugar, ethanol and distributes fuels and natural gas | Utilities |
Alupar Investimento SA
 Alupar Investimento SA Electric UtilitiesUtilities Operates as a holding company with interest in hydro-electric power generation and transmission business | Utilities |
Perfin Administração de Recursos Ltda.
Perfin Administração de Recursos Ltda. Investment ManagersFinance Perfin is an active, fundamental research-intensive manager which aims to provide consistent returns and preserve capital over the long-term, based on fundamental analysis of assets, strict risk controls, transparency in their processes and ethical principles. The firm constructs concentrated, high conviction portfolios based on quantitative and qualitative analysis. They continuously monitor and analyze invested assets and manage risk to identify the optimal relationship between risk and return of each investment. | Finance |
Fundação Escola de Comércio Álvares Penteado
 Fundação Escola de Comércio Álvares Penteado Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Casa dos Ventos Energias Renováveis SA
 Casa dos Ventos Energias Renováveis SA Alternative Power GenerationUtilities Operates renewable energy projects | Utilities |
RUMO SA
 RUMO SA RailroadsTransportation Provides rail-based logistics services | Transportation |
EDTE - Empresa Diamantina de Transmissao de Energia SA
 EDTE - Empresa Diamantina de Transmissao de Energia SA Electric UtilitiesUtilities Provides electric services | Utilities |
TSM - Transmissora Serra da Mantiqueira SA
TSM - Transmissora Serra da Mantiqueira SA Alternative Power GenerationUtilities Provides electric utility services | Utilities |
Perfin Administração de Recursos Ltda. /Private Equity/
Perfin Administração de Recursos Ltda. /Private Equity/ Investment ManagersFinance Functions as an alternative investment manager | Finance |
Mori Energia Holding SA
Mori Energia Holding SA Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass Gás e Energia SA
 Compass Gás e Energia SA Gas DistributorsUtilities Engages in transformation of natural gas | Utilities |
Gemini Energy SA
Gemini Energy SA Electric UtilitiesUtilities Operates an energy transmission company | Utilities |
Comerc Participações SA
 Comerc Participações SA Electric UtilitiesUtilities Provides energy solutions | Utilities |
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