Estimated market cap $3.15BShares outstanding from the company’s latest SEC filing (all share classes, each priced at its own close; ADRs converted to ADS) × last close from Tiingo. Updated daily. This figure: shares as of Oct 31, 2026, last close Nov 13, 2026.14.44M shares, shares as of Oct 31, 2026CIK 729580The SEC’s Central Index Key, the number it uses to identify every company and person that files.
Insider trades, 12 mo
0 buys · 37 sells
$18.11M sold, open market
Congress trades, 24 mo
—
No disclosed trades
13F holders
…
Lobbying, 12 mo
—
No lobbying filings
Federal contracts, 12 mo
—
None matched
Ask your AI:
Latest 10-Q
What changed in Bel Fuse Inc. Class B's latest quarterly report, compared with the one before.
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Insider trades
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
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13F holders
Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
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Top 10 holders.Premium lists every holder, with CSV downloads.
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
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Lobbying
What Bel Fuse Inc. Class B and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
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Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
13F holders, Q3 2026Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
202
66 added · 70 trimmed
Latest 10-Q
Q3 2026
What changed in Bel Fuse Inc. Class B's latest quarterly report, compared with the one before.
Filed Nov 3, 2026 · Quarter ended Sep 30, 2026
Summary text goes here once it has loaded. Summary text goes here once it has loaded.
Summary text goes here once it has loaded.
Summary text goes here once it has loaded.
AI summary of changes vs the prior report. Written by AI from the paragraphs that changed, and checked against them. This is information, not investment advice.
Compared with the 10-Q for the quarter ended Jun 30, 2026. Sections compared: management's discussion, risk factors, legal proceedings and controls and procedures.
Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.
No open-market insider trades reported since Sep 14, 2026. Insiders have two business days to file.
Recent insider trades
How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
202 funds report BELFB. Values checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.
Funds report more than 100% of Class B shares (Q2 2026)Fund managers with more than $100 million in US-listed stocks file a 13F each quarter. It lists their long stock positions only (shorts, options and bonds are left out) and can arrive up to 45 days after the quarter ends, so this is a snapshot of the quarter end. We add up the shares every fund reports in this class and divide by the shares outstanding. The total can pass 100%: the same shares are often reported by more than one manager (an adviser and the fund it runs), lent shares can be reported twice, and the share count can be out of date after buybacks. We divided 12.59M reported Class B shares by 12.32M Class B shares, from the cover page of the company’s filing as of Jul 31, 2026. Only this class is counted, not the company’s other classes.
279 funds hold the Class B shares.
Q3 2026: 63% · 5,560 of ~8,900 funds reported so farFunds have 45 days after a quarter ends to file. This quarter’s reports are still arriving, so the figure only counts the funds that have filed so far and will usually rise.
Q1 202684%
Q2 2026>100%
Q3 2026 (so far)63%
Q3 2026. 42 new, 66 added to, 70 trimmed, 120 exited since Q2 2026.
One of these funds reports its values in thousands of dollars; its figures are shown in dollars.
Download CSVEvery fund that holds BELFB, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.
Trades by members of Congress
Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.
Recent congressional trades
Member
Transaction
Amount
Traded → disclosed
Since tradeHow the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss.
What Bel Fuse Inc. Class B and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.
No recent lobbying filings for this company.
Institutional ownership over time
How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.
Funds holding the stock
Shares they report
Funds holding the stock by quarter
Q2 2013
74
—
5.91M
$79.5M
Q3 2013
74
0
5.83M
$101.6M
Q4 2013
85
+11
5.67M
$120.9M
Q1 2014
88
+3
5.60M
$122.6M
Q2 2014
90
+2
5.94M
$152.4M
Q3 2014
93
+3
5.82M
$144.0M
Q4 2014
99
+6
5.92M
$161.9M
Q1 2015
86
-13
5.90M
$112.4M
Q2 2015
88
+2
5.64M
$115.8M
Q3 2015
85
-3
5.87M
$114.0M
Q4 2015
86
+1
6.32M
$109.3M
Q1 2016
92
+6
6.17M
$90.2M
Q2 2016
96
+4
6.35M
$114.5M
Q3 2016
101
+5
6.71M
$161.9M
Q4 2016
112
+11
7.23M
$223.5M
Q1 2017
103
-9
7.33M
$187.2M
Q2 2017
102
-1
7.14M
$176.4M
Q3 2017
104
+2
7.26M
$226.9M
Q4 2017
102
-2
7.45M
$187.5M
Q1 2018
89
-13
7.38M
$139.7M
Q2 2018
94
+5
7.46M
$155.9M
Q3 2018
93
-1
7.74M
$205.2M
Q4 2018
87
-6
7.92M
$146.0M
Q1 2019
99
+12
7.82M
$197.8M
Q2 2019
89
-10
7.64M
$131.3M
Q3 2019
90
+1
7.57M
$113.8M
Q4 2019
92
+2
7.90M
$162.0M
Q1 2020
89
-3
7.78M
$75.8M
Q2 2020
90
+1
7.47M
$80.1M
Q3 2020
87
-3
7.38M
$78.7M
Q4 2020
87
0
7.56M
$113.6M
Q1 2021
88
+1
7.82M
$155.6M
Q2 2021
82
-6
7.46M
$107.4M
Q3 2021
82
0
6.36M
$79.1M
Q4 2021
67
-15
6.17M
$79.6M
Q1 2022
70
+3
6.28M
$111.9M
Q2 2022
61
-9
6.62M
$102.9M
Q3 2022
83
+22
6.34M
$160.2M
Q4 2022
90
+7
6.25M
$205.7M
Q1 2023
95
+5
6.67M
$250.3M
Q2 2023
126
+31
7.19M
$412.5M
Q3 2023
133
+7
6.98M
$333.2M
Q4 2023
146
+13
7.46M
$498.0M
Q1 2024
147
+1
7.75M
$467.3M
Q2 2024
153
+6
8.30M
$541.6M
Q3 2024
163
+10
8.40M
$658.9M
Q4 2024
168
+5
8.68M
$715.7M
Q1 2025
164
-4
9.21M
$689.5M
Q2 2025
174
+10
9.67M
$944.2M
Q3 2025
197
+23
9.35M
$1.3B
Q4 2025
209
+12
10.20M
$1.7B
Q1 2026
238
+29
10.35M
$2.0B
Q2 2026
280
+42
12.59M
$4.2B
Q3 2026
202
-78
7.71M
$1.9B
Each point is a quarter-end, from Q2 2013 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.
Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.
The history follows the company's current CUSIP number (077347300). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q2 2013) can be later than the stock's first appearance in 13F reports.
Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.
A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.