• THESEUS CONFERENCE 2026, Torremolinos (Spain),  24-26 March 2026.
• NewAthena Rising: SWG4, Barcelona (Spain), 2-5 June 2026.
• The X-ray Universe 2026, Elche (Spain), 8-11 June 2026.
• Galactic Frontiers 2026: Advancing X-ray Astronomy in a Multiwavelength Universe, Bad Honnef (Germany), 15-18 June 2026 (Abstract deadline: 11/03/2026).
• High Energy Astrophysics and Cosmology in the era of all-sky surveys, Yerevan (Armenia), 15-16 June 2026 (Abstract deadline: 31/03/2026).
• Breaking the limits 2026: Super-Eddington accretion onto compact objects, Sardinia (Italy),  22-26 June 2026.   
• European Astronomical Society Annual Meeting, Lausanne (Switzerland), 29 June – 3 July 2026.
• Space Telescopes and Instrumentation 2026: Ultraviolet to Gamma Ray,  Copenhagen (Denmark), 5–10 July 2026 (Abstract deadline: 17/06/2026).
• AGN Feedback across all scales and time, Garching (Germany), 6-10 July 2026.
• The UK National Astronomy Meeting: The Origin and Growth of Supermassive Black Holes, 20-24 July 2026 (Abstract deadline: 02/04/2026).
• 6th COSPAR Scientific Assembly: E1.18: Revolutionising High-Energy Astrophysics with NewAthena, Florence (Italy), 1-8 August 2026.
• Chandra's Dynamic Universe, Cambridge MA (USA), 18-20 August 2026 (EoI: 05/03/2026).
• Tidal Disruption Events and Nuclear Transients in Crete vol. 2, Heraklion (Crete, Greece), 24-28 August 2026.
• The many tones of accretion – to the memory of Tomaso Belloni, Cefalù (Sicily, Italy), 7-11 September 2026.
• Many faces of stellar-mass black holes, Kathmandu (Nepal), 12-16 October (Abstract deadline: 05/06/2026).
• YAGN26 - Young Astronomers on Galactic Nuclei, Sevilla (Spain), 26-28 October 2026.

Notice that this list is not meant to be all-inclusive. Updates, corrections, or meeting suggestions should be sent to the ACO.