X0102 24F-2NT LIVE 0000819118 XXXXXXXX N-1A Fidelity Concord Street Trust 245 Summer Street Boston MA X1 02210 Fidelity Large Cap Stock K6 Fund S000057286 true Fidelity Series Small Cap Core Fund S000077859 true Fidelity Series Small Cap Discovery Fund S000055368 true Fidelity Small Cap Discovery Fund S000055370 true Fidelity Small Cap Stock K6 Fund S000057287 true Fidelity Small Cap Stock Fund S000055369 true Fidelity Founders Fund S000064789 true Fidelity Large Cap Stock Fund S000055364 true Fidelity Mid-Cap Stock K6 Fund S000065697 true Fidelity Mid-Cap Stock Fund S000055365 true 811-05251 033-15983 04/30/2026 false false 7621302788 4666485781 16445808738 21112294519 0 (13490991731) 0.0001381 0 0 0 0 Stacie M. Smith President and Treasurer 04/30/2026