| Classe: IX | |
| Date | Incident | Battle | Place |
| March 15, 1938 | Laid down | - | Germany |
| May 14, 1938 | Launched | Germany, ocean going submarine, christened U 37. | Germany |
| August 4, 1938 | Commissioned | - | Germany |
| April 1940 | - | Weserübung. | Norway |
| August 24, 1940 | Combat | sinks the Penzance. | North Atlantic |
| December 19, 1940 | Combat | sinks the Sfax. | Germany |
| May 8, 1945 | Scuttled | - | Germany |
| Date | Incident | Battle | Place |
| August 9, 1938 | Launched | Germany, ocean going submarine, christened U 38. | Germany |
| October 24, 1938 | Commissioned | - | Germany |
| April 8, 1940 | - | Weserübung. | Norway |
| October 19, 1940 | Combat | Convoy HX 79. | North Atlantic |
| September 9, 1941 | - | Convoy SC 42. | North Atlantic |
| May 5, 1945 | Scuttled | - | Germany |
| Date | Incident | Battle | Place |
| September 22, 1938 | Launched | Germany, ocean going submarine, christened U 39. | Germany |
| December 10, 1938 | Commissioned | - | Germany |
| September 14, 1939 | Sunk | sunk by the Foxhound, Faulknor, Firedrake. | North Sea |
| Date | Incident | Battle | Place |
| November 9, 1938 | Launched | Germany, ocean going submarine, christened U 40. | Germany |
| February 11, 1939 | Commissioned | - | Germany |
| October 13, 1939 | Sunk | - | North Atlantic |
| Date | Incident | Battle | Place |
| November 27, 1937 | Laid down | - | Germany |
| January 20, 1939 | Launched | Germany, ocean going submarine, christened U 41. | Germany |
| April 22, 1939 | Commissioned | - | Germany |
| February 5, 1940 | Sunk | sunk by the Antelope. | North Atlantic |
| Date | Incident | Battle | Place |
| February 16, 1939 | Launched | Germany, ocean going submarine, christened U 42. | Germany |
| July 15, 1939 | Commissioned | - | Germany |
| October 13, 1939 | Sunk | sunk by the Ilex, Imogen. | North Atlantic |
| Date | Incident | Battle | Place |
| August 15, 1938 | Laid down | - | Germany |
| May 23, 1939 | Launched | Germany, ocean going submarine, christened U 43. | Germany |
| August 26, 1939 | Commissioned | - | Germany |
| September 20, 1940 | Combat | Convoy HX 72. | North Atlantic |
| December 2, 1940 | - | Convoy HX 90. | North Atlantic |
| September 11, 1941 | - | Convoy SC 42. | North Atlantic |
| July 29, 1942 | - | Convoy ON 115. | North Atlantic |
| February 22, 1943 | - | Convoy UC 1. | North Atlantic |
| March 12, 1943 | - | Convoy UGS 6. | North Atlantic |
| July 30, 1943 | Sunk | sunk by the Santee. | North Atlantic |
| Date | Incident | Battle | Place |
| August 5, 1939 | Launched | Germany, ocean going submarine, christened U 44. | Germany |
| November 4, 1939 | Commissioned | - | Germany |
| March 20, 1940 | Sunk | sunk by the Icarus, Express, Esk, Impulsive. | North Sea |