BELFA · Insider trading · 13F holders · Congress trades
Bel Fuse Inc. (BELFA)
Who is buying and selling BELFA: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 11
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
BELFA at a glance
- No open-market insider purchases or sales of BELFA were filed in the last 90 days.
- 11 13F filers hold BELFA among their 50 largest positions, worth $87.9M combined, including Jonathan Auerbach. The biggest bets by portfolio weight are Logan Stone Capital, LLC (3.3%), Santa Monica Partners LP (2.8%) and Mangrove Partners Im, LLC (2.0%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
- No member of Congress has disclosed a trade in BELFA.
BELFA insider trading
No open-market insider purchases or sales of BELFA were filed in the last 90 days.
Who owns BELFA? Hedge funds and superinvestors
11 13F filers hold BELFA among their 50 largest positions, worth $87.9M combined, including Jonathan Auerbach. The biggest bets by portfolio weight are Logan Stone Capital, LLC (3.3%), Santa Monica Partners LP (2.8%) and Mangrove Partners Im, LLC (2.0%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
Superinvestors holding BELFA: Jonathan Auerbach 0.9%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Mangrove Partners Im, LLCHedge fund | 2.0% | $30.5M | 104,706 | — | Q2 2026 |
| Logan Stone Capital, LLCHedge fund | 3.3% | $15.7M | 54,020 | — | Q2 2026 |
| Cable Car Capital, LPHedge fund | 0.3% | $13.5M | 46,463 | -0.6% shares | Q2 2026 |
| Jonathan AuerbachHedge fund | 0.9% | $8.2M | 28,048 | -19.4% shares | Q2 2026 |
| Investors Asset Management of Georgia Inc /ga/ /advAsset manager | 1.8% | $4.9M | 24,806 | -1.2% shares | Q3 2026 |
| Brasada Capital Management, LPWealth manager | 0.9% | $4.9M | 16,695 | — | Q2 2026 |
| Santa Monica Partners LPHedge fund | 2.8% | $4.6M | 23,434 | +0.0% shares | Q3 2026 |
| Nitor Capital Management LLCHedge fund | 1.4% | $2.0M | 7,000 | +0.0% shares | Q2 2026 |
| Transmarket Holdings LPHedge fund | 1.1% | $2.0M | 10,022 | New | Q3 2026 |
| PenderFund Capital Management Ltd.Asset manager | 0.5% | $1.2M | 4,100 | — | Q2 2026 |
| Algorithmic Investment Models, LLCAsset manager | 0.4% | $326K | 1,119 | New | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 3, Q2 2026: 8). Screen BELFA in the grand portfolio →
BELFA stock trades by members of Congress
No member of Congress has disclosed a trade in BELFA.
BELFA questions and answers
Are insiders buying BELFA stock?
No open-market insider purchases or sales of BELFA were filed in the last 90 days.
Which hedge funds own BELFA?
11 13F filers hold BELFA among their 50 largest positions, worth $87.9M combined, including Jonathan Auerbach. The biggest bets by portfolio weight are Logan Stone Capital, LLC (3.3%), Santa Monica Partners LP (2.8%) and Mangrove Partners Im, LLC (2.0%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
Has Congress traded BELFA?
No member of Congress has disclosed a trade in BELFA.
Who is the largest holder of BELFA?
Among 13F filers, Mangrove Partners Im, LLC reports the largest BELFA position, $30.5M (104,706 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Logan Stone Capital, LLC's: 3.3% of its portfolio.
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