Henk van Waarde, Claudio De Persis, Kanat Camlibel and Pietro Tesi have received the 2021 IEEE Control Systems Letters Outstanding Paper Award for their paper “Willems’ Fundamental Lemma for State-space Systems and its Extension to Multiple Datasets”, published in the IEEE Control Systems letters. The annual award recognizes an outstanding paper published in the letters in the preceding two calendar years. The selection criteria are originality, potential impact on the theoretical foundations of control, importance and practical significance in applications, and clarity.