0000018748 2026-01-01 2026-06-30 0000018748 us-gaap:CommonStockMember 2026-06-30 2026-06-30 0000018748 us-gaap:CommonStockMember 2026-06-30 0000018748 us-gaap:CommonStockMember 2026-01-01 2026-06-30 0000018748 us-gaap:CommonStockMember 2025-12-31 0000018748 us-gaap:CommonStockMember 2024-12-31 0000018748 us-gaap:CommonStockMember 2023-12-31 0000018748 us-gaap:CommonStockMember 2022-12-31 0000018748 us-gaap:CommonStockMember 2021-12-31 0000018748 us-gaap:CommonStockMember 2020-12-31 shares iso4217:USD shares false 0000018748 N-CSRS Central Securities Corporation 2026-06-30 40000000 29549265

62.11

<p id="xdx_80D_ecef--CapitalStockTableTextBlock_hus-gaap--StatementClassOfStockAxis__us-gaap--CommonStockMember_dU_gL1CSTTB-QWIF_zatQH5TALtc9" style="font: 9.5pt/normal Times New Roman, Times, serif; margin: 0pt 0pt 3pt; text-transform: none; color: #0f235f; text-indent: 25.2pt; text-align: justify">3. Common Stock—During the six months ended June 30, 2026, the Corporation did not purchase any shares of its Common Stock. The Corporation may from time to time purchase its Common Stock in such amounts and at such prices as the Board of Directors may deem advisable in the best interests of the stockholders. Purchases will only be made at prices less than net asset value per share, thereby increasing the net asset value of shares held by the remaining stockholders. Shares so acquired may be held as treasury stock available for stock distributions, or may be retired.

60.50

54.26

46.49

40.48

48.87

39.49

62.11

60.50

54.26

46.49

40.48

48.87

52.45

50.71

45.69

37.77

33.39

44.58