William Blair & Company’s Bel Fuse Inc Class B BELFB Stock Holding History

William Blair & Company’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 Q2	$1.17M	Buy	3,528 +3	+0.1%	+$811	﹤0.01%	923
2026 Q1	$698K	Sell	3,525 -4,500	-56%	-$940K	﹤0.01%	1043
2025 Q4	$1.36M	Hold	8,025	–	–	﹤0.01%	851
2025 Q3	$1.13M	Sell	8,025 -1,125	-12%	-$143K	﹤0.01%	884
2025 Q2	$894K	Hold	9,150	–	–	﹤0.01%	927
2025 Q1	$685K	Hold	9,150	–	–	﹤0.01%	991
2024 Q4	$755K	Hold	9,150	–	–	﹤0.01%	983
2024 Q3	$718K	Hold	9,150	–	–	﹤0.01%	1009
2024 Q2	$597K	Hold	9,150	–	–	﹤0.01%	1042
2024 Q1	$552K	Hold	9,150	–	–	﹤0.01%	1059
2023 Q4	$611K	Hold	9,150	–	–	﹤0.01%	1021
2023 Q3	$437K	Hold	9,150	–	–	﹤0.01%	1100
2023 Q2	$525K	Hold	9,150	–	–	﹤0.01%	1039
2023 Q1	$344K	Hold	9,150	–	–	﹤0.01%	1179
2022 Q4	$301K	Hold	9,150	–	–	﹤0.01%	1232
2022 Q3	$231K	Buy	+9,150	New	+$215K	﹤0.01%	1333
2022 Q2	–	Sell	-11,550	Closed	-$206K	–	1865
2022 Q1	$206K	Buy	+11,550	New	+$170K	﹤0.01%	1501

Other funds holding BELFB

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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

William Blair & Company increased its Bel Fuse Inc Class B (BELFB) stake by 0.09% in Q2 2026, buying an estimated $811 and bringing the position to 3,528 shares worth $1.17M. The position accounts for ﹤0.01% of the portfolio, ranked #923.

William Blair & Company first reported a position in BELFB in Q1 2022 and has held it in 17 quarters since. The position peaked at $1.36M in Q4 2025. 276 funds tracked by Wall St. Rank hold BELFB as of Q2 2026.

William Blair & Company held 3,528 shares of Bel Fuse Inc Class B worth $1.17M as of Q2 2026.
William Blair & Company bought 3 Bel Fuse Inc Class B shares in Q2 2026, an estimated $811.
Bel Fuse Inc Class B made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #923 holding.
William Blair & Company first reported a position in Bel Fuse Inc Class B in Q1 2022 and has held it in 17 quarters since.
William Blair & Company's Bel Fuse Inc Class B position peaked at $1.36M in Q4 2025.
276 funds tracked by Wall St. Rank held Bel Fuse Inc Class B as of Q2 2026.

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