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- JUSTIN LTD- 11996710 - Incorporated on 15 May 2019 
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- THE GOOD GRAPE LTD- 10322149 - Incorporated on 10 August 2016 
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- QUIRKLIT LTDDisolved- 15624714 - Dissolved on 17 December 2024 
- QUIRK NEST LTDActive - Proposal to Strike off- 16097514 - Incorporated on 24 November 2024 
- PAULINE QUIRKE ACADEMY NEWCASTLE LIMITED- 09449575 - Incorporated on 19 February 2015 
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- QUIRK KORNER LTDActive - Proposal to Strike off- 12090176 - Incorporated on 8 July 2019 
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- RUSSELL QUIRK LTD- 11584016 - Incorporated on 24 September 2018 
- QUIRK & KEY LIMITED- 15047524 - Incorporated on 3 August 2023