Ken Griffin
BELFB

Ken Griffin’s Bel Fuse Inc Class B BELFB Stock Holding History

Ken Griffin’s Portfolio BELFB Stock Details BELFB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$6.44M Buy
32,527
+28,580
+724% +$5.97M ﹤0.01% 3937
2025
Q4 		$670K Sell
3,947
-92,103
-96% -$14.4M ﹤0.01% 8301
2025
Q3 		$13.5M Buy
96,050
+72,585
+309% +$9.25M ﹤0.01% 2827
2025
Q2 		$2.29M Buy
+23,465
New +$1.77M ﹤0.01% 5451
2025
Q1 		– Sell
-7,699
Closed -$615K – 14472
2024
Q4 		$635K Buy
+7,699
New +$623K ﹤0.01% 8018
2024
Q2 		– Sell
-41,180
Closed -$2.59M – 14248
2024
Q1 		$2.48M Buy
41,180
+5,022
+14% +$311K ﹤0.01% 5099
2023
Q4 		$2.41M Buy
36,158
+8,844
+32% +$474K ﹤0.01% 5038
2023
Q3 		$1.3M Buy
27,314
+19,372
+244% +$999K ﹤0.01% 6038
2023
Q2 		$456K Sell
7,942
-2,963
-27% -$136K ﹤0.01% 8147
2023
Q1 		$410K Sell
10,905
-97,163
-90% -$3.5M ﹤0.01% 8721
2022
Q4 		$3.56M Buy
108,068
+45,245
+72% +$1.48M ﹤0.01% 4468
2022
Q3 		$1.59M Buy
62,823
+8,348
+15% +$196K ﹤0.01% 6039
2022
Q2 		$848K Buy
54,475
+15,883
+41% +$259K ﹤0.01% 7409
2022
Q1 		$688K Sell
38,592
-22,796
-37% -$336K ﹤0.01% 8616
2021
Q4 		$793K Buy
61,388
+3,678
+6% +$47.2K ﹤0.01% 8510
2021
Q3 		$717K Buy
+57,710
New +$774K ﹤0.01% 9007
2015
Q1 		– Sell
-10,729
Closed -$293K – 8518
2014
Q4 		$293K Sell
10,729
-2,194
-17% -$57.3K ﹤0.01% 5471
2014
Q3 		$320K Buy
12,923
+886
+7% +$21.3K ﹤0.01% 5190
2014
Q2 		$309K Sell
12,037
-9,095
-43% -$216K ﹤0.01% 5032
2014
Q1 		$463K Buy
21,132
+5,793
+38% +$116K ﹤0.01% 4446
2013
Q4 		$327K Buy
+15,339
New +$311K ﹤0.01% 4512

Other funds holding BELFB

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Ken Griffin's BELFB Position: Q1 2026 in Review

Ken Griffin increased its Bel Fuse Inc Class B (BELFB) stake by 724% in Q1 2026, buying an estimated $5.97M and bringing the position to 32,527 shares worth $6.44M. The position accounts for ﹤0.01% of the portfolio, ranked #3937.

Ken Griffin first reported a position in BELFB in Q4 2013 and has held it in 21 quarters since. The position peaked at $13.5M in Q3 2025. 234 funds tracked by Wall St. Rank hold BELFB as of Q1 2026.

  • Ken Griffin held 32,527 shares of Bel Fuse Inc Class B worth $6.44M as of Q1 2026.
  • Ken Griffin bought 28,580 Bel Fuse Inc Class B shares in Q1 2026, an estimated $5.97M.
  • Bel Fuse Inc Class B made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #3937 holding.
  • Ken Griffin first reported a position in Bel Fuse Inc Class B in Q4 2013 and has held it in 21 quarters since.
  • Ken Griffin's Bel Fuse Inc Class B position peaked at $13.5M in Q3 2025.
  • 234 funds tracked by Wall St. Rank held Bel Fuse Inc Class B as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.