Diogo António R. da Silveira

Director/Board Member at SAVANNAH RESOURCES PLC

Net worth: 78 522 $ as of 30/07/2026

65 year

39 connections

Non-Energy Minerals

Communications

Consumer Services

Profile

Diogo António R.
da Silveira is currently Deputy Chairman at Savannah Resources Plc since 2024 and Chairman at Floene Energias SA since 2021.
Former roles include Chief Executive Officer at The Navigator Co. SA from 2014 to 2019, Chief Executive Officer at Açoreana Companhia de Seguros SA from 2008 to 2014, Chief Executive Officer at ONITELECOM - Infocomunicações SA from 2005 to 2007, Chief Executive Officer at NOS Comunicações SA from 1999 to 2001, Chief Executive Officer at Novis, Executive Director at Sonae Indústria SGPS SA, Non-Executive Director at Glunz, Executive Director at Sonaecom BV, Non-Executive Director at Digitmarket-Sistemas de Informação SA, and Non-Executive Director at Tafisa.
Education includes an MBA from INSEAD and undergraduate studies at École centrale de Lille.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
SAVANNAH RESOURCES PLC 0.04%	30/12/2024	1,070,663 ( 0.04% )	78 522 $	30/07/2026

Diogo António R. da Silveira active positions

Companies	Position	Start
SAVANNAH RESOURCES PLC	Director/Board Member	09/11/2022
Floene Energias SA Floene Energias SA Gas DistributorsUtilities Distributes natural gas	Chairman	15/04/2021

All active positions of Diogo António R. da Silveira

Former positions of Diogo António R. da Silveira

Companies	Position	End
THE NAVIGATOR COMPANY, S.A.	Chief Executive Officer	31/03/2019
Açoreana Companhia de Seguros SA Açoreana Companhia de Seguros SA Investment ManagersFinance Profile unavailable	Chief Executive Officer	28/02/2014
ONITELECOM - Infocomunicações SA ONITELECOM - Infocomunicações SA Specialty TelecommunicationsCommunications Provides telecommunications, media & technology services	Chief Executive Officer	31/01/2007
NOS Comunicações SA NOS Comunicações SA Specialty TelecommunicationsCommunications Provides fixed-line telecommunications services	Chief Executive Officer	30/04/2001
Tafisa /Pt/	Director/Board Member	-

See the detail of Diogo António R. da Silveira's experience

Training of Diogo António R. da Silveira

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Diogo António R. da Silveira's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	14
Savannah Resources Plc Savannah Resources Plc Other Metals/MineralsNon-Energy Minerals Engages in exploring mineral properties	Non-Energy Minerals
The Navigator Co. SA The Navigator Co. SA Pulp & PaperProcess Industries Produces pulp and paper	Process Industries
ONITELECOM - Infocomunicações SA ONITELECOM - Infocomunicações SA Specialty TelecommunicationsCommunications Provides telecommunications, media & technology services	Communications
NOS Comunicações SA NOS Comunicações SA Specialty TelecommunicationsCommunications Provides fixed-line telecommunications services	Communications
Açoreana Companhia de Seguros SA Açoreana Companhia de Seguros SA Investment ManagersFinance Profile unavailable	Finance
INSEAD INSEAD Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Sonae Indústria SGPS SA Sonae Indústria SGPS SA Forest ProductsNon-Energy Minerals Manufactures wood based panels	Non-Energy Minerals
École centrale de Lille École centrale de Lille Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Sonaecom BV
Digitmarket-Sistemas de Informação SA Digitmarket-Sistemas de Informação SA Information Technology ServicesTechnology Services Provides information technology consulting services	Technology Services
Floene Energias SA Floene Energias SA Gas DistributorsUtilities Distributes natural gas	Utilities
Tafisa /Pt/
Glunz
Novis