The W4Q Quantum Science Conference will take place in Palma de Mallorca (Spain) from March 23 to 25, 2026, bringing together leading research across all areas of quantum physics, from fundamental science to quantum technologies. Organized within the Women for Quantum (W4Q) initiative, the conference aims to promote scientific excellence through diversity, foster international collaborations, and engage early-career researchers. The event is open to everyone, with a particular encouragement for young researchers to participate. The program will include invited talks, contributed talks, posters, and a round-table discussion, covering topics such as quantum optics, quantum information, quantum sensing, and quantum communications.