![David Williams](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>)
David Williams
Founder at
APERTURA ENERGY PLC
Net worth: 12 M $ as of 2026-08-30
Profile
David Jeffreys Williams founded Breedon Group Plc in 2008, where he worked as Non-Executive Director from 2008 to 2019, Apertura Energy Plc in 2021, where he is working as Non-Executive Director from 2026, and Acceler8 Ventures Plc in 2021, where he worked as Chairman.
Mr. Williams also founded Marwyn Capital LLP.
Mr. Williams also currently works at Bay Capital Plc, as Chairman from 2025, D.W.
Pension Fund Ltd., as Director, SecurEnvoy Ltd., as Director, and various other companies.
Mr. Williams also formerly worked at Augean Ltd., as Chairman from 2004 to 2009, Zetar Ltd., as Non-Executive Chairman from 2009 to 2012, Talarius Plc, as Non-Executive Chairman, and various other companies.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2025-04-10 | 3,500,000 ( 20% ) | 6 M $ | 2026-08-30 | |
BAY CAPITAL PLC 25.35% | 2026-08-09 | 17,744,916 ( 25.35% ) | 3 M $ | 2026-08-30 |
SHEARWATER GROUP PLC 6.79% | 2025-06-29 | 1,618,757 ( 6.79% ) | 1 M $ | 2026-08-30 |
| 2025-04-09 | 1,111,304 ( 0.15% ) | 1 M $ | 2026-08-30 |
David Williams active positions
| Companies | Position | Start |
|---|---|---|
| BAY CAPITAL PLC | Chairman | 2025-11-27 |
| APERTURA ENERGY PLC | Founder | 2021-03-30 |
Brookcourt Solutions Ltd.
 Brookcourt Solutions Ltd. Information Technology ServicesTechnology Services Provides IT security, technical consulting and risk management services | Director/Board Member | - |
GeoLang Holdings Ltd.
 GeoLang Holdings Ltd. Packaged SoftwareTechnology Services Develops a technology for locating, securing, and controlling the movement of sensitive data and intellectual property | Director/Board Member | - |
Peclet Communications Ltd. | Director/Board Member | - |
Pentest Ltd.
 Pentest Ltd. Miscellaneous Commercial ServicesCommercial Services Provides information technology security services | Director/Board Member | - |
SecurEnvoy Ltd.
 SecurEnvoy Ltd. Packaged SoftwareTechnology Services Develops multifactor authentication enterprise software solutions | Director/Board Member | - |
Shearwater Subco Ltd. | Director/Board Member | - |
Shearwater Shared Services Ltd. | Director/Board Member | - |
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Former positions of David Williams
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Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
54
1st degree connections
60
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 60 |
|---|---|
Shearwater Group Plc
 Shearwater Group Plc Information Technology ServicesTechnology Services Provides digital cyber security solutions | Technology Services |
Augean Ltd.
 Augean Ltd. TruckingTransportation Provides hazardous waste management services | Transportation |
Zetar Ltd.
 Zetar Ltd. Food: Specialty/CandyConsumer Non-Durables Manufactures confectionery and snack food products | Consumer Non-Durables |
The Advantage Property Income Trust Ltd.
 The Advantage Property Income Trust Ltd. Investment Trusts/Mutual FundsMiscellaneous Closed-End Investment Fund/Investment Trust | Miscellaneous |
Talarius Plc
 Talarius Plc Casinos/GamingConsumer Services Operates gaming centers | Consumer Services |
Abbott Toxicology Ltd.
 Abbott Toxicology Ltd. Medical SpecialtiesHealth Technology Manufactures clinical diagnostic products and provides drug testing services | Health Technology |
Marwyn Value Investors Ltd. /Old/
 Marwyn Value Investors Ltd. /Old/ Financial ConglomeratesFinance Provides investment holding services | Finance |
Aldgate Capital Plc
 Aldgate Capital Plc Financial ConglomeratesFinance Acquisition vehicle setup to invest in gaming and betting companies | Finance |
Marwyn Value Investors Ltd.
 Marwyn Value Investors Ltd. Investment Trusts/Mutual FundsMiscellaneous Functions as a closed-end investment fund or Investment trust | Miscellaneous |
OneAdvanced Group Ltd.
 OneAdvanced Group Ltd. Packaged SoftwareTechnology Services Develops SaaS workflow applications | Technology Services |
Entertainment One Ltd.
 Entertainment One Ltd. Financial ConglomeratesFinance Engages in acquisition, production and distribution of films and entertainment rights | Finance |
Marwyn Materials Ltd.
 Marwyn Materials Ltd. Financial ConglomeratesFinance Provides investment services | Finance |
Waste Recycling Group Ltd.
 Waste Recycling Group Ltd. Environmental ServicesIndustrial Services Provides waste management services | Industrial Services |
Topp Holdings Ltd.
 Topp Holdings Ltd. Financial ConglomeratesFinance Specializes in property investments | Finance |
Marwyn Investment Management LLP
 Marwyn Investment Management LLP Investment ManagersFinance Marwyn Investment Management invests in mid cap private and public companies located in UK, European and North American. The firm targeting companies with an enterprise value £150 million to £1.5 billion. Marwyn Investment Management provides financing in the form of equity for growth capital requirements and M&A activities. | Finance |
Silverdell Plc
 Silverdell Plc Environmental ServicesIndustrial Services Provides hazardous waste consulting and remediation services | Industrial Services |
Praesepe Plc
 Praesepe Plc Casinos/GamingConsumer Services Operates family amusement centers, adult gaming centers, casino gaming and certain sports betting and bingo business operations | Consumer Services |
RAL Ltd.
 RAL Ltd. Media ConglomeratesConsumer Services Provides gambling and betting services | Consumer Services |
Breedon Group Plc
 Breedon Group Plc Construction MaterialsNon-Energy Minerals Engages in the business of quarrying of aggregates and the production of added value products | Non-Energy Minerals |
Marwyn Alternative Capital Ltd. | |
D.W. Pension Fund Ltd.
 D.W. Pension Fund Ltd. Investment ManagersFinance Functions as a Pension/Retirement Fund | Finance |
Marwyn Capital LLP
 Marwyn Capital LLP Investment ManagersFinance Provides financial advisory services | Finance |
Oxford BioDynamics Plc
 Oxford BioDynamics Plc BiotechnologyHealth Technology Discovers and develops novel biomarkers | Health Technology |
SecurEnvoy Ltd.
SecurEnvoy Ltd. Packaged SoftwareTechnology Services Develops multifactor authentication enterprise software solutions | Technology Services |
RR Sea TAPP Ltd.
 RR Sea TAPP Ltd. Real Estate DevelopmentFinance Provides real estate services | Finance |
Pentest Ltd.
Pentest Ltd. Miscellaneous Commercial ServicesCommercial Services Provides information technology security services | Commercial Services |
Tessera Partners Uk Ltd. | |
GeoLang Ltd.
 GeoLang Ltd. Packaged SoftwareTechnology Services Operates as a software development company which provides cyber solutions | Technology Services |
Xcina Consulting Ltd.
 Xcina Consulting Ltd. Miscellaneous Commercial ServicesCommercial Services Provides information technology consultancy services | Commercial Services |
Wentworth Ltd.
 Wentworth Ltd. Financial ConglomeratesFinance Provides financial investment services | Finance |
GeoLang Holdings Ltd.
GeoLang Holdings Ltd. Packaged SoftwareTechnology Services Develops a technology for locating, securing, and controlling the movement of sensitive data and intellectual property | Technology Services |
Brookcourt Solutions Ltd.
Brookcourt Solutions Ltd. Information Technology ServicesTechnology Services Provides IT security, technical consulting and risk management services | Technology Services |
Aurum Subco Ltd. | |
Grissan Ltd. | |
Myeye Technology Ltd. | |
Tessera Lnvestment Partners LLP | |
Peclet Ltd.
 Peclet Ltd. Wireless TelecommunicationsCommunications Provides wireless wearable communication technology services | Communications |
Dunnings Ltd. | |
Jersey Royal Land Holdings Ltd. | |
Tapp Maidenhead Ltd. | |
RR Sea TOPP Bletchley Ltd. | |
RR Sea TOPP I Ltd. | |
Conygar Advantage Ltd. | |
Conygar Cross Hands Ltd. | |
Lamont Property Holdings Ltd. | |
Conygar Rhosgoc Ltd. | |
Conygar Haverfordwest Retail Ltd. | |
RR Sea Lamont I Ltd. | |
RR Sea Lamont II Ltd. | |
RR Sea Lamont III Ltd. | |
Acceler8 Ventures Plc
 Acceler8 Ventures Plc Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Bay Capital Plc
 Bay Capital Plc Financial ConglomeratesFinance Operates as a holding company with interest in acquiring and investing in industrial, construction and business services sectors | Finance |
Peclet Communications Ltd. | |
Red Capital Plc
 Red Capital Plc Financial ConglomeratesFinance Provides investments in business and technology sectors | Finance |
Shearwater Shared Services Ltd. | |
Shearwater Subco Ltd. | |
Xcina Ltd. | |
Acceler8 Ventures Subco Ltd. | |
Bay Capital Subco Ltd. | |
Red Capital Subco Ltd. |
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