BEL FUSE INC BELFB
CL B · Common Stock · CUSIP 077347300
- SectorTechnology
- IndustryElectronic Coils, Transformers & Other Inductors
- HeadquartersWest Orange, NJ
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($7.2m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $97.69. Options: 5 managers hold calls ($1.5m notional), 2 hold puts ($244.2k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 83 |
| Q4 2022 | 91 |
| Q1 2023 | 97 |
| Q2 2023 | 127 |
| Q3 2023 | 135 |
| Q4 2023 | 147 |
| Q1 2024 | 148 |
| Q2 2024 | 154 |
| Q3 2024 | 164 |
| Q4 2024 | 170 |
| Q1 2025 | 165 |
| Q2 2025 | 175 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 78 | 63 |
| Q4 2023 | 86 | 64 |
| Q1 2024 | 83 | 70 |
| Q2 2024 | 71 | 74 |
| Q3 2024 | 77 | 67 |
| Q4 2024 | 76 | 76 |
| Q1 2025 | 63 | 97 |
| Q2 2025 | 88 | 89 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $2.4m | $2.2m | 0.91 |
| Q4 2024 | $658.8k | $445.3k | 0.68 |
| Q1 2025 | $725.2k | $449.2k | 0.62 |
| Q2 2025 | $1.5m | $244.2k | 0.16 |
Biggest buyers
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Added | +328.6k |
| FMR LLC | Added | +272.1k |
| T. Rowe Price Investment Management, Inc. | New | +172.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +148.4k |
| LORD, ABBETT & CO. LLC | New | +81.6k |
| BESSEMER GROUP INC | Added | +71.9k |
| WASATCH ADVISORS LP | Added | +71.4k |
| ROYAL BANK OF CANADA | Added | +36.0k |
| MILLENNIUM MANAGEMENT LLC | New | +32.8k |
| Informed Momentum Co LLC | New | +24.3k |
Biggest sellers
| Potrero Capital Research LLC | Reduced | -141.3k |
| Portolan Capital Management, LLC | Reduced | -121.7k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -92.3k |
| LSV ASSET MANAGEMENT | Reduced | -69.5k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -69.1k |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | -50.9k |
| Granahan Investment Management, LLC | Reduced | -42.6k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -40.3k |
| Invesco Ltd. | Reduced | -36.6k |
| ROYCE & ASSOCIATES LP | Reduced | -35.1k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $1.1m11.2k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $312.6k3.2k shares |
| SIMPLEX TRADING, LLC | Added | $68.0k700 shares |
| GROUP ONE TRADING LLC | New | $58.6k600 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $244.2k2.5k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution new · filed 2026-02-17 | 7.9% |
| FMR LLC 13G · institution +1.3 pts · filed 2026-08-06 | 7.1% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.4% |
Fell to 5% or below in the last year: T. Rowe Price Investment Management, Inc. (4.4%, 2026-08-14), Janus Henderson Group Ltd. (4.8%, 2026-08-13), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 2 | $66.0k | 1 | $728.0k | — |
| Q4 2023 | 1 | $12.4k | 4 | $434.9k | — |
| Q1 2024 | 0 | — | 1 | $56.7k | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 2 | $196.8k | — |
| Q1 2025 | 0 | — | 1 | $14.7k | — |
| Q2 2025 | 0 | — | 2 | $774.0k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-06-13 | Lai Kenneth Koon Keung VP of Asia Operations | Sold | $336.1k4.0k shares |
| 2025-04-30 | BERNSTEIN DANIEL President and CEO, director | Sold | $437.8k6.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 910.1k $88.9m | Reduced -7.0k |
| BlackRock, Inc. 0.00% of their portfolio | 830.1k $81.1m | Reduced -10.6k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 645.5k $63.1m | Reduced -69.1k |
| JANUS HENDERSON GROUP PLC 0.02% of their portfolio | 427.4k $41.8m | Added +23.1k |
| ADVISORY RESEARCH INC 5.87% of their portfolio | 390.9k $38.2m | Added +15.8k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 385.8k $37.7m | Added +328.6k |
| ROYCE & ASSOCIATES LP 0.38% of their portfolio | 382.5k $37.4m | Reduced -35.1k |
| BESSEMER GROUP INC 0.05% of their portfolio | 325.8k $31.8m | Added +71.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 321.9k $31.5m | Added +8.2k |
| WASATCH ADVISORS LP 0.15% of their portfolio | 284.0k $27.7m | Added +71.4k |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 283.5k $27.7m | Reduced -40.3k |
| FMR LLC 0.00% of their portfolio | 274.6k $26.8m | Added +272.1k |
| AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio | 264.9k $25.9m | Reduced -92.3k |
| Makaira Partners LLC 7.31% of their portfolio | 246.0k $24.0m | Unchanged |
| STATE STREET CORP 0.00% of their portfolio | 239.6k $23.4m | Added +6.4k |
| GW&K Investment Management, LLC 0.19% of their portfolio | 215.6k $21.1m | Reduced -2.4k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 196.5k $19.2m | Added +1.6k |
| T. Rowe Price Investment Management, Inc. 0.01% of their portfolio | 172.3k $16.8m | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 153.0k $14.9m | Added +148.4k |
| Thrivent Financial for Lutherans 0.03% of their portfolio | 147.1k $14.4m | Reduced -22.3k |
| Invesco Ltd. 0.00% of their portfolio | 137.4k $13.4m | Reduced -36.6k |
| BROWN ADVISORY INC 0.02% of their portfolio | 132.0k $12.9m | Reduced -8.9k |
| Granahan Investment Management, LLC 0.43% of their portfolio | 108.9k $10.6m | Reduced -42.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 108.3k $10.6m | Reduced -2.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 98.6k $9.6m | Added +1.2k |
| LORD, ABBETT & CO. LLC 0.03% of their portfolio | 81.6k $8.0m | New |
| Ballast Asset Management, LP 3.52% of their portfolio | 69.4k $6.8m | Unchanged |
| SANTA MONICA PARTNERS LP 3.85% of their portfolio | 67.6k $6.6m | Unchanged |
| Roubaix Capital, LLC 3.03% of their portfolio | 64.6k $6.3m | Reduced -5.7k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 62.6k $6.1m | Added +4.3k |
| Portolan Capital Management, LLC 0.38% of their portfolio | 62.5k $6.1m | Reduced -121.7k |
| DEAN INVESTMENT ASSOCIATES, LLC 0.75% of their portfolio | 52.1k $5.1m | Added +3.6k |
| NEOS Investment Management LLC 0.06% of their portfolio | 51.7k $5.1m | Added +12.1k |
| Tema ETFs LLC 1.34% of their portfolio | 51.7k $5.1m | Added +13.3k |
| Boston Partners 0.01% of their portfolio | 51.3k $5.0m | Added +13.2k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 49.3k $4.8m | Added +36.0k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 48.9k $4.8m | Reduced -2.0k |
| ISTHMUS PARTNERS, LLC 0.54% of their portfolio | 47.4k $4.6m | Reduced -3 |
| LSV ASSET MANAGEMENT 0.01% of their portfolio | 43.1k $4.2m | Reduced -69.5k |
| Dean Capital Management 1.68% of their portfolio | 42.0k $4.1m | Added +7.5k |
| PARAGON ASSOCIATES & PARAGON ASSOCIATES II JOINT VENTURE 6.21% of their portfolio | 40.0k $3.9m | Reduced -22.0k |
| LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio | 39.1k $3.8m | Added +10.5k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 37.3k $3.6m | Added +3.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 33.9k $3.3m | Added +13.6k |
| Potrero Capital Research LLC 1.52% of their portfolio | 33.5k $3.3m | Reduced -141.3k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 32.8k $3.2m | New |
| Expect Equity LLC 3.36% of their portfolio | 32.2k $3.1m | Reduced -1.0k |
| MORGAN STANLEY 0.00% of their portfolio | 31.0k $3.0m | Reduced -14.2k |
| Apis Capital Advisors, LLC 1.07% of their portfolio | 30.8k $3.0m | Added +9.4k |
| HERALD INVESTMENT MANAGEMENT Ltd 0.43% of their portfolio | 30.0k $2.9m | Unchanged |
| UBS Group AG 0.00% of their portfolio | 29.7k $2.9m | Reduced -3.2k |
| Legato Capital Management LLC 0.31% of their portfolio | 26.3k $2.6m | Added +4.6k |
| INVESTORS ASSET MANAGEMENT OF GEORGIA INC /GA/ /ADV 1.14% of their portfolio | 25.2k $2.5m | Reduced -26.5k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 24.6k $2.4m | Reduced -50.9k |
| Informed Momentum Co LLC 0.36% of their portfolio | 24.3k $2.4m | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 23.5k $2.3m | New |
| Hodges Capital Management Inc. 0.22% of their portfolio | 23.3k $2.3m | Reduced -14.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 22.8k $2.2m | Added +7.1k |
| Nuveen, LLC 0.00% of their portfolio | 22.5k $2.2m | Reduced -5.2k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 22.1k $2.2m | Added +14.3k |
| BARCLAYS PLC 0.00% of their portfolio | 21.6k $2.1m | Added +9.1k |
| SG Capital Management LLC 0.18% of their portfolio | 21.2k $2.1m | New |
| POLEN CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 20.4k $2.0m | New |
| BANTAMAC CAPITAL, LLC 0.71% of their portfolio | 20.4k $2.0m | Reduced -1.1k |
| Swiss National Bank 0.00% of their portfolio | 19.9k $1.9m | Reduced -300 |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 18.5k $1.8m | Reduced -15.3k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.01% of their portfolio | 18.1k $1.8m | Reduced -3.7k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 17.2k $1.7m | Added +2.0k |
| CenterBook Partners LP 0.09% of their portfolio | 16.6k $1.6m | Reduced -13.2k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 16.0k $1.6m | Added +383 |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio | 15.5k $1.5m | Reduced -21.0k |
| Perritt Capital Management Inc 0.77% of their portfolio | 15.3k $1.5m | Reduced -2.4k |
| PINNACLE ASSOCIATES LTD 0.02% of their portfolio | 14.1k $1.4m | Added +1.9k |
| RITHOLTZ WEALTH MANAGEMENT 0.03% of their portfolio | 11.8k $1.1m | Reduced -1.1k |
| Creative Planning 0.00% of their portfolio | 11.3k $1.1m | Added +513 |
| Legal & General Group Plc 0.00% of their portfolio | 10.1k $989.3k | Reduced -1.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 9.9k $970.9k | Added +116 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 9.7k $942.7k | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 9.6k $941.7k | Reduced -112 |
| SIERRA SUMMIT ADVISORS LLC 0.16% of their portfolio | 9.3k $906.0k | New |
| BLAIR WILLIAM & CO/IL 0.00% of their portfolio | 9.2k $893.9k | Unchanged |
| TECTONIC ADVISORS LLC 0.05% of their portfolio | 8.9k $873.2k | Reduced -6.5k |
| CORSAIR CAPITAL MANAGEMENT, L.P. 0.17% of their portfolio | 8.9k $872.6k | Unchanged |
| DekaBank Deutsche Girozentrale 0.00% of their portfolio | 8.3k $798.0k | Unchanged |
| Koss-Olinger Consulting, LLC 0.06% of their portfolio | 7.9k $774.8k | Reduced -600 |
| TrueMark Investments, LLC 0.16% of their portfolio | 7.5k $728.1k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 7.3k $712.3k | Added +463 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 7.1k $690.9k | Reduced -1.5k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 7.0k $688.4k | Added +758 |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.00% of their portfolio | 6.9k $675.0k | Added +1.5k |
| Grandeur Peak Global Advisors, LLC 0.08% of their portfolio | 6.6k $644.8k | Reduced -806 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 6.6k $642.4k | New |
| PFG Advisors 0.03% of their portfolio | 6.3k $613.5k | Added +199 |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 6.2k $609.4k | Added +38 |
| FORMULA GROWTH LTD 0.22% of their portfolio | 6.0k $586.1k | New |
| MACKENZIE FINANCIAL CORP 0.00% of their portfolio | 6.0k $582.6k | Reduced -620 |
| MARTINGALE ASSET MANAGEMENT L P 0.01% of their portfolio | 5.7k $557.5k | Reduced -10.8k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 5.7k $556.7k | Reduced -428 |
| Quadrature Capital Ltd 0.01% of their portfolio | 5.4k $523.5k | New |
| CITIGROUP INC 0.00% of their portfolio | 5.0k $490.1k | Reduced -4.0k |