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Tamsin Defriez
Director/Board Member at
AUCTION TECHNOLOGY GROUP PLC
Net worth: 15 983 $ as of 2026-05-30
Profile
Mr. Tamsin M.
Defriez is an Independent Non-Executive Director at The Gym Group Plc and an Independent Non-Executive Director at Auction Technology Group Plc.
He is on the Board of Directors at The Gym Group Plc, INTO University Partnerships Ltd. and Auction Technology Group Plc.
Mr. Defriez was previously employed as a Chief Operating Officer by dunnhumby Ltd., a Chief Customer Officer by Addison Lee Group Ltd., a Managing Director by TUI UK Ltd., a Head-E Commerce by Betfair Ltd., a Chief Executive Officer by findmypast.
Ltd., and a Trustee by Imperial War Museum.
He also served on the board at The Trading Co. Ltd. He received his undergraduate degree from Princeton University and an MBA from Imperial College London.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2025-09-29 | 2,773 ( 0% ) | 15 983 $ | 2026-05-30 |
Tamsin Defriez active positions
| Companies | Position | Start |
|---|---|---|
| AUCTION TECHNOLOGY GROUP PLC | Director/Board Member | 2022-02-03 |
| THE GYM GROUP PLC | Director/Board Member | 2025-04-30 |
INTO University Partnerships Ltd.
 INTO University Partnerships Ltd. Other Consumer ServicesConsumer Services Operates as an university | Director/Board Member | 2022-10-31 |
Former positions of Tamsin Defriez
| Companies | Position | End |
|---|---|---|
dunnhumby Ltd.
 dunnhumby Ltd. Miscellaneous Commercial ServicesCommercial Services Offers market research and data analysis services | Chief Operating Officer | 2022-12-31 |
Addison Lee Group Ltd.
 Addison Lee Group Ltd. Other TransportationTransportation Operates as a fleet of private hire vehicles | Corporate Officer/Principal | 2017-08-31 |
TUI UK Ltd.
 TUI UK Ltd. Other Consumer ServicesConsumer Services Provides travelling services | Corporate Officer/Principal | 2016-09-30 |
Betfair Ltd.
 Betfair Ltd. Media ConglomeratesConsumer Services Provides online platform for gambling and betting | Corporate Officer/Principal | - |
findmypast.com
 findmypast.com Internet Software/ServicesTechnology Services Provides online data records | Chief Executive Officer | - |
Training of Tamsin Defriez
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
12
1st degree connections
12
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 12 |
|---|---|
Imperial College London
 Imperial College London Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
dunnhumby Ltd.
dunnhumby Ltd. Miscellaneous Commercial ServicesCommercial Services Offers market research and data analysis services | Commercial Services |
Princeton University
 Princeton University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
findmypast.com
findmypast.com Internet Software/ServicesTechnology Services Provides online data records | Technology Services |
The Gym Group Plc
 The Gym Group Plc Other Consumer ServicesConsumer Services Provides health and fitness facilities | Consumer Services |
Imperial War Museum
 Imperial War Museum Other Consumer ServicesConsumer Services Operates as an war museum | Consumer Services |
TUI UK Ltd.
TUI UK Ltd. Other Consumer ServicesConsumer Services Provides travelling services | Consumer Services |
The Trading Co. Ltd.
 The Trading Co. Ltd. Financial ConglomeratesFinance Provides investment services | Finance |
INTO University Partnerships Ltd.
INTO University Partnerships Ltd. Other Consumer ServicesConsumer Services Operates as an university | Consumer Services |
Addison Lee Group Ltd.
Addison Lee Group Ltd. Other TransportationTransportation Operates as a fleet of private hire vehicles | Transportation |
Betfair Ltd.
Betfair Ltd. Media ConglomeratesConsumer Services Provides online platform for gambling and betting | Consumer Services |
Auction Technology Group Plc
 Auction Technology Group Plc Internet Software/ServicesTechnology Services Operates online marketplaces for curated auctions | Technology Services |
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