v3.26.3
Condensed Consolidated Statements of Shareholders' Equity and Redeemable Noncontrolling Interest (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Common Class A [Member]
Common Stock [Member]
Common Class A [Member]
Retained Earnings [Member]
Common Class A [Member]
Common Class B [Member]
Common Stock [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
Common Class B [Member]
Retained Earnings [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Noncontrolling Interest [Member]
Total
Balance at Dec. 31, 2024 $ 212     $ 1,046       $ 31,514 $ 345,031 $ (17,227) $ 80,586 $ 360,576
Balance (in shares) at Dec. 31, 2024 2,115     10,425                
Net earnings attributable to Bel Fuse shareholders                 17,874   838 17,874
Cash dividends declared on common stock   $ (127) $ (127)     $ (737) $ (737)          
Issuance of restricted common stock       $ 13       (13)       0
Issuance of restricted common stock (in shares)       129                
Forfeiture of restricted common stock       $ (2)               0
Foreign currency translation adjustment, net of taxes                   (1,248)   (1,248)
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (588)   (588)
Stock-based compensation expense               1,179       1,179
Change in unfunded SERP liability, net of taxes                   (28)   (28)
Balance at Mar. 31, 2025 $ 212     $ 1,059       32,680 362,041 (19,091) 81,034 376,901
Balance (in shares) at Mar. 31, 2025 2,115     10,552                
Dividends paid to noncontrolling interest holders                     (390)  
Currency translation adjustment, net of taxes of $0 in all periods presented                   (1,248)   (1,248)
Change in unfunded SERP liability, net of taxes                   (28)   (28)
Net earnings                 17,874   838 17,874
Redemption value adjustment attributable to noncontrolling interest                     (390)  
Balance at Dec. 31, 2024 $ 212     $ 1,046       31,514 345,031 (17,227) 80,586 360,576
Balance (in shares) at Dec. 31, 2024 2,115     10,425                
Net earnings attributable to Bel Fuse shareholders                       66,985
Cash dividends declared on common stock     (381)       (2,218)          
Foreign currency translation adjustment, net of taxes                       (362)
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                       (1,419)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                       0
Change in unfunded SERP liability, net of taxes                       (82)
Balance at Sep. 30, 2025 $ 212     $ 1,058       36,163 409,417 (19,090) 81,271 427,760
Balance (in shares) at Sep. 30, 2025 2,115     10,547                
Currency translation adjustment, net of taxes of $0 in all periods presented                       (362)
Change in unfunded SERP liability, net of taxes                       (82)
Net earnings                       66,985
Balance at Mar. 31, 2025 $ 212     $ 1,059       32,680 362,041 (19,091) 81,034 376,901
Balance (in shares) at Mar. 31, 2025 2,115     10,552                
Net earnings attributable to Bel Fuse shareholders                 26,861   822 26,861
Cash dividends declared on common stock   (127) (127)     (740) (740)          
Forfeiture of restricted common stock (in shares)       (3)                
Forfeiture of restricted common stock       $ (1)               0
Foreign currency translation adjustment, net of taxes                   540   540
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (386)   (386)
Stock-based compensation expense               1,721       1,721
Change in unfunded SERP liability, net of taxes                   (27)   (27)
Balance at Jun. 30, 2025 $ 212     $ 1,058       34,402 388,035 (18,964) 80,966 404,743
Balance (in shares) at Jun. 30, 2025 2,115     10,549                
Dividends paid to noncontrolling interest holders                     (890)  
Forfeiture of restricted common stock               1        
Currency translation adjustment, net of taxes of $0 in all periods presented                   540   540
Change in unfunded SERP liability, net of taxes                   (27)   (27)
Net earnings                 26,861   822 26,861
Redemption value adjustment attributable to noncontrolling interest                     (890)  
Redemption value adjustment attributable to noncontrolling interest                     315  
Net earnings attributable to Bel Fuse shareholders                 22,250   620 22,250
Cash dividends declared on common stock   (127) (127)     (741) (741)          
Forfeiture of restricted common stock (in shares)       (2)                
Forfeiture of restricted common stock                       0
Foreign currency translation adjustment, net of taxes                   346   346
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (445)   (445)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                       0
Stock-based compensation expense               1,761       1,761
Change in unfunded SERP liability, net of taxes                   (27)   (27)
Balance at Sep. 30, 2025 $ 212     $ 1,058       36,163 409,417 (19,090) 81,271 427,760
Balance (in shares) at Sep. 30, 2025 2,115     10,547                
Currency translation adjustment, net of taxes of $0 in all periods presented                   346   346
Change in unfunded SERP liability, net of taxes                   (27)   (27)
Redemption value adjustment attributable to noncontrolling interest                     315  
Net earnings                 22,250   620 22,250
Redemption value adjustment attributable to noncontrolling interest                     (315)  
Balance at Dec. 31, 2025 $ 212     $ 1,058       38,315 403,102 (17,174) 93,161 425,513
Balance (in shares) at Dec. 31, 2025 2,115     10,543                
Redemption value adjustment attributable to noncontrolling interest                     2,633  
Net earnings attributable to Bel Fuse shareholders                 11,379   972 11,379
Cash dividends declared on common stock   (127) (127)     (736) (736)          
Issuance of restricted common stock       $ 6       (6)       0
Issuance of restricted common stock (in shares)       53                
Forfeiture of restricted common stock (in shares)       (1)                
Forfeiture of restricted common stock                       0
Issuance of shares upon vesting of Performance Stock Units (in shares)       12                
Foreign currency translation adjustment, net of taxes                   1,143   1,143
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (296)   (296)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                   (1)   (1)
Stock-based compensation expense               2,077       2,077
Change in unfunded SERP liability, net of taxes                   (10)   (10)
Balance at Mar. 31, 2026 $ 212     $ 1,064       40,386 413,618 (16,338) 96,766 438,942
Balance (in shares) at Mar. 31, 2026 2,115     10,607                
Currency translation adjustment, net of taxes of $0 in all periods presented                   1,143   1,143
Change in unfunded SERP liability, net of taxes                   (10)   (10)
Redemption value adjustment attributable to noncontrolling interest                     2,633  
Net earnings                 11,379   972 11,379
Redemption value adjustment attributable to noncontrolling interest                     (2,633)  
Balance at Dec. 31, 2025 $ 212     $ 1,058       38,315 403,102 (17,174) 93,161 425,513
Balance (in shares) at Dec. 31, 2025 2,115     10,543                
Net earnings attributable to Bel Fuse shareholders                       63,149
Cash dividends declared on common stock     (381)       (2,342)          
Foreign currency translation adjustment, net of taxes                       (928)
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                       (906)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                       91
Change in unfunded SERP liability, net of taxes                       (27)
Balance at Sep. 30, 2026 $ 212     $ 1,236       487,339 463,528 (18,944) 0 933,371
Balance (in shares) at Sep. 30, 2026 2,115     12,325                
Currency translation adjustment, net of taxes of $0 in all periods presented                       (928)
Change in unfunded SERP liability, net of taxes                       (27)
Net earnings                       63,149
Balance at Mar. 31, 2026 $ 212     $ 1,064       40,386 413,618 (16,338) 96,766 438,942
Balance (in shares) at Mar. 31, 2026 2,115     10,607                
Redemption value adjustment attributable to noncontrolling interest                     6,738  
Net earnings attributable to Bel Fuse shareholders                 25,480   1,757 25,480
Cash dividends declared on common stock   (127) (127)     (743) (743)          
Forfeiture of restricted common stock (in shares)       (8)                
Forfeiture of restricted common stock       $ (1)               0
Foreign currency translation adjustment, net of taxes                   1,954   1,954
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (239)   (239)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                   34   34
Stock-based compensation expense               3,034       3,034
Change in unfunded SERP liability, net of taxes                   (8)   (8)
Balance at Jun. 30, 2026 $ 212     $ 1,236       484,292 438,228 (14,597) 102,601 909,371
Balance (in shares) at Jun. 30, 2026 2,115     12,324                
Dividends paid to noncontrolling interest holders                     (2,660)  
Issuance of common stock       $ 173 $ 440,871   441,044          
Issuance of common stock (in shares)       1,725                
Forfeiture of restricted common stock               1        
Currency translation adjustment, net of taxes of $0 in all periods presented                   1,954   1,954
Change in unfunded SERP liability, net of taxes                   (8)   (8)
Redemption value adjustment attributable to noncontrolling interest                     6,738  
Net earnings                 25,480   1,757 25,480
Redemption value adjustment attributable to noncontrolling interest                     (2,660)  
Redemption value adjustment attributable to noncontrolling interest                     (6,738)  
Redemption value adjustment attributable to noncontrolling interest                     11,823  
Net earnings attributable to Bel Fuse shareholders                 26,290   276 26,290
Cash dividends declared on common stock   $ (127) $ (127)     $ (863) (863)          
Forfeiture of restricted common stock (in shares)       (2)                
Forfeiture of restricted common stock       $ (1)               (1)
Foreign currency translation adjustment, net of taxes                   (4,025)   (4,025)
Unrealized losses on interest rate swap cash flow hedge, net of taxes of $0 in all periods presented                   (371)   (371)
Unrealized holding gains on marketable securities, net of taxes of $0 in all periods presented                   58   58
Stock-based compensation expense               3,047       3,047
Change in unfunded SERP liability, net of taxes                   (9)   (9)
Balance at Sep. 30, 2026 $ 212     $ 1,236       $ 487,339 463,528 (18,944) 0 933,371
Balance (in shares) at Sep. 30, 2026 2,115     12,325                
Dividends paid to noncontrolling interest holders                     (662)  
Issuance of common stock       $ 1     $ 1          
Issuance of common stock (in shares)       3                
Currency translation adjustment, net of taxes of $0 in all periods presented                   (4,025)   (4,025)
Change in unfunded SERP liability, net of taxes                   $ (9)   (9)
Redemption value adjustment attributable to noncontrolling interest                     11,823  
Net earnings                 $ 26,290   276 $ 26,290
Transfer of redeemable noncontrolling interest                     (114,038)  
Redemption value adjustment attributable to noncontrolling interest                     (662)  
Redemption value adjustment attributable to noncontrolling interest                     $ (11,823)