STM Group Plc provides international financial services focused on retirement, estate and succession planning, and wealth structuring through its subsidiaries. The company offers pension solutions including Qualifying Recognised Overseas Pension Schemes (QROPS), Qualifying Non-UK Pension Schemes (QNUPS), workplace pensions, and international pensions; life assurance solutions such as bonds, annuities, and bespoke products emphasizing asset protection, tax optimization, privacy, and inheritance tax planning via its Gibraltar-based STM Life Assurance PCC Plc; and corporate trustee services encompassing trust and company management, insurance management, international tax advice, and Spanish legal and tax services. STM operates in segments comprising Pensions, Life Assurance, and Other Services, serving high net worth individuals, affluent clients, and listed companies across the United Kingdom, Gibraltar, Malta, Australia, Spain, Jersey, Cyprus, and internationally. Founded in 1989 and headquartered at Holborn Gate in London, United Kingdom, STM Group Plc was acquired by PSF Capital GP II Limited, through its vehicle Jambo SRC Limited, in October 2024 for approximately £40 million, resulting in its delisting from the London Stock Exchange AIM market and integration as a subsidiary within the acquirer's structure; this transaction followed regulatory approvals from the Gibraltar Financial Services Commission and Malta Financial Services Authority, marking a significant ownership change and strategic shift under new parent oversight.