William Blair & Company
BELFA icon

William Blair & Company’s Bel Fuse Inc Class A BELFA Stock Holding History

William Blair & Company’s Portfolio BELFA Stock Details BELFA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$146K Buy
501
+1
+0.2% +$243 ﹤0.01% 1623
2026
Q1 		$90.1K Hold
500
– – ﹤0.01% 1609
2025
Q4 		$75.9K Hold
500
– – ﹤0.01% 1610
2025
Q3 		$58.2K Hold
500
– – ﹤0.01% 1619
2025
Q2 		$44.9K Hold
500
– – ﹤0.01% 1616
2025
Q1 		$36K Hold
500
– – ﹤0.01% 1621
2024
Q4 		$45K Hold
500
– – ﹤0.01% 1623
2024
Q3 		$49.7K Hold
500
– – ﹤0.01% 1631
2024
Q2 		$40.5K Hold
500
– – ﹤0.01% 1627
2024
Q1 		$35.4K Hold
500
– – ﹤0.01% 1634
2023
Q4 		$32.3K Hold
500
– – ﹤0.01% 1627
2023
Q3 		$23.2K Hold
500
– – ﹤0.01% 1668
2023
Q2 		$29K Hold
500
– – ﹤0.01% 1660
2023
Q1 		$18.2K Hold
500
– – ﹤0.01% 1688
2022
Q4 		$15.8K Hold
500
– – ﹤0.01% 1697
2022
Q3 		$14K Buy
+500
New +$13.8K ﹤0.01% 1721
2022
Q2 		– Sell
-500
Closed -$11K – 1864
2022
Q1 		$11K Buy
+500
New +$8.84K ﹤0.01% 1825

Other funds holding BELFA

Brown Advisory
Brown Advisory Baltimore, Maryland $64.6B AUM 18.98% 1-Year Est. Return
MP
Mangrove Partners Greenwich, Connecticut $1.52B AUM 36.54% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
GF
Gabelli Funds Rye, New York $15.7B AUM 36.4% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
LSC
Logan Stone Capital Chicago, Illinois $473M AUM 0.79% 1-Year Est. Return
GI
GAMCO Investors Greenwich, Connecticut $11.1B AUM 41.79% 1-Year Est. Return

William Blair & Company's BELFA Position: Q2 2026 in Review

William Blair & Company increased its Bel Fuse Inc Class A (BELFA) stake by 0.2% in Q2 2026, buying an estimated $243 and bringing the position to 501 shares worth $146K. The position accounts for ﹤0.01% of the portfolio, ranked #1623.

William Blair & Company first reported a position in BELFA in Q1 2022 and has held it in 17 quarters since. 110 funds tracked by Wall St. Rank hold BELFA as of Q2 2026.

  • William Blair & Company held 501 shares of Bel Fuse Inc Class A worth $146K as of Q2 2026.
  • William Blair & Company bought 1 Bel Fuse Inc Class A share in Q2 2026, an estimated $243.
  • Bel Fuse Inc Class A made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1623 holding.
  • William Blair & Company first reported a position in Bel Fuse Inc Class A in Q1 2022 and has held it in 17 quarters since.
  • 110 funds tracked by Wall St. Rank held Bel Fuse Inc Class A as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.