Sutton Harbour Group plc owns and operates Sutton Harbour in Plymouth, United Kingdom, and engages in marine operations including fisheries, harbour and marina activities; waterfront real estate regeneration, investment and development; public car parking; and regeneration projects. The company, incorporated in 1989 and headquartered at Ground Floor, 2A North East Quay, Sutton Harbour, Plymouth PL4 0BN, operates through segments encompassing Marine with Sutton Harbour Marina offering 414 berths for leisure and commercial vessels, King Point Marina with 119 leisure berths and space leased to Princess Yachts until 2028, and Plymouth Fisheries as the second largest fresh fish market in England; Real Estate involving rental of commercial premises such as office space, retail including the refurbished Old Barbican Market let to national tenants, and leisure facilities housing tenants like the National Marine Aquarium; Car Parking managing a 340-space multi-storey car park near the aquarium, a 51-space surface car park in the Barbican, and additional areas at the fisheries, marina and properties; and Regeneration focused on developing residential, office and leisure schemes including completed Harbour Arch Quay with 14 apartments sold off-plan, consented Sugar Quay tower for 170 luxury apartments and 30,000 sq ft retail/leisure, proposed North Quay House redevelopment into 10 apartments and retail/office units, and planning for the former Plymouth City Airport site. Wholly owned subsidiaries include Sutton Harbour Company as the statutory harbour authority since 1847, Sutton Harbour Services Limited, Plymouth City Airport Limited, Sutton Harbour Property and Regeneration Limited, Harbour Arch Quay Limited and Sutton Harbour Projects Limited, with the company operating as a subsidiary of FB Investors LLP. Recent developments encompass completion of Harbour Arch Quay in 2023 resulting in a £2.629m loss after construction challenges and financing costs, placement of King Point Marina and six investment properties for sale to support debt reduction under a new £21.7m NatWest credit facility expiring December 2026 with milestones including asset sales by March 2025, sale of two assets for £2.7m in July 2025 reducing bank debt to £18.065m, £2.923m equity raise via share subscription in May 2023 and additional related party loans including £1.970m post-year-end from Beinhaker Design Services Limited, entry into arbitration with the Environment Agency over Sutton Harbour Lock maintenance scheduled for November 2024, ongoing dispute with Plymouth City Council over the former airport lease, commissioning of a study post-May 2024 closure of Plymouth Trawler Agents to explore fish auction reopening options, and submission of a masterplan for phased redevelopment of the airport site respecting five-year aviation safeguarding extended in February 2024.