Ships hit by U-621
See the profile page for U-621
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | ||
| 23 Oct, 1942 | U-621 | Horst Schünemann | Empire Turnstone | 6.113 |  | br | ONS-136 | |
| 18 Dec, 1942 | U-621 | Max Kruschka |  | Oropos | 4.474 |  | gr | ONS-152 |
| 20 Dec, 1942 | U-621 | Max Kruschka | Otina | 6.217 | | br | ON-153 | |
| 11 Mar, 1943 | U-621 | Max Kruschka | Baron Kinnaird | 3.355 | | br | ONS-169 | |
| 15 Jun, 1944 | U-621 | Hermann Stuckmann | USS LST-280 (d.) | 1.625 |  | am | ||
| 29 Jul, 1944 | U-621 | Hermann Stuckmann | HMS Prince Leopold | 2.938 | | br | ||
| 30 Jul, 1944 | U-621 | Hermann Stuckmann | | Ascanius (d.) | 10.048 | | br | EBC-54 |
| 34.770 | ||||||||
| 5 ships sunk (23.097 tons) and 2 ships damaged (11.673 tons).
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