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 ($5.9m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $198.03. Options: 3 managers hold calls ($25.9m notional), 3 hold puts ($1.7m).
Trends to Q1 2026
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 |
| Q3 2025 | 197 |
| Q4 2025 | 207 |
| Q1 2026 | 235 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 71 | 74 |
| Q3 2024 | 77 | 67 |
| Q4 2024 | 76 | 76 |
| Q1 2025 | 63 | 97 |
| Q2 2025 | 88 | 89 |
| Q3 2025 | 99 | 93 |
| Q4 2025 | 101 | 94 |
| Q1 2026 | 128 | 96 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $1.5m | $244.2k | 0.16 |
| Q3 2025 | $12.1m | $747.4k | 0.06 |
| Q4 2025 | $15.0m | $831.2k | 0.06 |
| Q1 2026 | $25.9m | $1.7m | 0.07 |
Biggest buyers
| Tidal Investments LLC | New | +141.8k |
| JANUS HENDERSON GROUP PLC | Added | +140.8k |
| JPMORGAN CHASE & CO | Added | +106.0k |
| LORD, ABBETT & CO. LLC | Added | +105.9k |
| FRANKLIN RESOURCES INC | Added | +102.1k |
| Allspring Global Investments Holdings, LLC | Added | +94.8k |
| WASATCH ADVISORS LP | Added | +68.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +48.9k |
| Tema ETFs LLC | Added | +43.4k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +40.1k |
Biggest sellers
| Invesco Ltd. | Reduced | -95.3k |
| NEOS Investment Management LLC | Sold out | -89.9k |
| Portolan Capital Management, LLC | Reduced | -86.3k |
| BESSEMER GROUP INC | Reduced | -69.6k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -66.3k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -64.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -60.8k |
| CONGRUENCE CAPITAL, LLC | Sold out | -55.8k |
| LOOMIS SAYLES & CO L P | Reduced | -55.1k |
| Makaira Partners LLC | Sold out | -55.0k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $17.9m90.2k shares |
| CITADEL ADVISORS LLC | Added | $5.7m29.0k shares |
| D. E. Shaw & Co., Inc. | New | $2.3m11.6k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.1m5.5k shares |
| CITADEL ADVISORS LLC | New | $356.4k1.8k shares |
| D. E. Shaw & Co., Inc. | New | $297.0k1.5k 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 Q1 2026
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 |
|---|---|---|---|---|---|
| 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 | — |
| Q3 2025 | 0 | — | 2 | $395.7k | — |
| Q4 2025 | 0 | — | 4 | $1.7m | — |
| Q1 2026 | 0 | — | 7 | $15.7m | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-03-16 | BERNSTEIN DANIEL Director | Sold | $1.4m6.7k shares |
| 2026-03-16 | Dawson Stephen Pres. - Power Solutions | Sold | $699.9k3.4k shares |
| 2026-03-16 | Lai Kenneth Koon Keung VP of Asia Operations | Sold | $112.2k552 shares |
| 2026-03-16 | Kozlovsky Suzanne Global Head of People | Sold | $43.5k214 shares |
| 2026-03-06 | Bittner Peter Pres. - Connectivity Solution | Sold | $2.4m12.3k shares |
| 2026-03-05 | Bittner Peter Pres. - Connectivity Solution | Sold | $2.1m10.0k shares |
| 2026-02-25 | Tuweiq Farouq Salem Ali President and CEO, director | Sold | $7.9m34.0k shares |
| 2026-02-24 | GILBERT PETER E Director | Sold | $1.1m4.5k 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, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 846.9k $167.7m | Reduced -19.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio | 773.5k $153.1m | Reduced -60.8k |
| JANUS HENDERSON GROUP PLC 0.07% of their portfolio | 760.1k $150.6m | Added +140.8k |
| FMR LLC 0.01% of their portfolio | 631.3k $125.0m | Reduced -36.4k |
| T. Rowe Price Investment Management, Inc. 0.08% of their portfolio | 572.9k $113.4m | Reduced -23.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 489.1k $96.8m | First filing |
| WASATCH ADVISORS LP 0.63% of their portfolio | 478.7k $94.8m | Added +68.2k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 329.5k $65.2m | First filing |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 308.0k $61.0m | Added +40.1k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 256.8k $50.9m | Added +2.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 249.4k $49.3m | Added +106.0k |
| STATE STREET CORP 0.00% of their portfolio | 242.5k $48.0m | Reduced -4.5k |
| Fisher Asset Management, LLC 0.01% of their portfolio | 215.6k $42.7m | Reduced -36.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.07% of their portfolio | 213.9k $42.3m | Reduced -17.5k |
| Thrivent Financial for Lutherans 0.07% of their portfolio | 188.1k $37.2m | Reduced -47.9k |
| LORD, ABBETT & CO. LLC 0.11% of their portfolio | 167.4k $33.1m | Added +105.9k |
| LOOMIS SAYLES & CO L P 0.04% of their portfolio | 145.6k $28.8m | Reduced -55.1k |
| Tidal Investments LLC 0.09% of their portfolio | 141.8k $28.1m | New |
| BESSEMER GROUP INC 0.04% of their portfolio | 137.3k $27.2m | Reduced -69.6k |
| Tema ETFs LLC 1.77% of their portfolio | 133.3k $26.4m | Added +43.4k |
| GW&K Investment Management, LLC 0.23% of their portfolio | 130.4k $25.8m | Reduced -31.9k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 123.5k $24.5m | Reduced -15.5k |
| ADVISORY RESEARCH INC 2.91% of their portfolio | 119.4k $23.6m | Reduced -15.4k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 114.4k $22.6m | Added +102.1k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 104.9k $20.8m | Added +3.9k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 97.7k $19.3m | Reduced -2.5k |
| ROYCE & ASSOCIATES LP 0.19% of their portfolio | 97.2k $19.2m | Added +5.1k |
| Allspring Global Investments Holdings, LLC 0.03% of their portfolio | 94.8k $19.3m | Added +94.8k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 84.2k $16.7m | Added +3.2k |
| BROWN ADVISORY INC 0.03% of their portfolio | 82.1k $16.3m | Reduced -36.1k |
| Invesco Ltd. 0.00% of their portfolio | 74.0k $14.7m | Reduced -95.3k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 70.8k $14.0m | First filing |
| SANTA MONICA PARTNERS LP 7.47% of their portfolio | 67.6k $13.4m | Unchanged |
| Boston Partners 0.01% of their portfolio | 65.4k $13.0m | Added +2.8k |
| MORGAN STANLEY 0.00% of their portfolio | 61.3k $12.1m | Added +19.7k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.02% of their portfolio | 60.0k $11.9m | Added +48.9k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 58.0k $11.5m | Added +3.6k |
| UBS Group AG 0.00% of their portfolio | 57.2k $11.3m | Added +10.7k |
| Portolan Capital Management, LLC 0.56% of their portfolio | 53.2k $10.5m | Reduced -86.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 51.2k $10.1m | Reduced -2.5k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.02% of their portfolio | 51.0k $10.1m | Added +14.1k |
| POLEN CAPITAL MANAGEMENT LLC 0.06% of their portfolio | 43.3k $8.6m | Added +20.8k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 38.4k $7.6m | New |
| Grandeur Peak Global Advisors, LLC 1.71% of their portfolio | 36.9k $7.3m | Reduced -1.3k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 35.7k $7.1m | Added +8.5k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 35.1k $6.9m | Reduced -5.5k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 35.0k $6.9m | Added +13.9k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 34.4k $6.8m | Reduced -42 |
| LPL Financial LLC 0.00% of their portfolio | 33.6k $6.7m | Added +19.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 33.0k $6.5m | Reduced -64.1k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 32.5k $6.4m | Added +28.6k |
| HERALD INVESTMENT MANAGEMENT Ltd 0.83% of their portfolio | 30.0k $5.9m | Unchanged |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 29.6k $5.9m | Reduced -4.4k |
| Nitor Capital Management LLC 3.87% of their portfolio | 25.4k $5.0m | Unchanged |
| INVESTORS ASSET MANAGEMENT OF GEORGIA INC /GA/ /ADV 2.01% of their portfolio | 24.8k $4.9m | Reduced -150 |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 24.5k $4.8m | Added +19.7k |
| Informed Momentum Co LLC 0.55% of their portfolio | 24.0k $4.8m | Reduced -2.5k |
| Ballast Asset Management, LP 2.09% of their portfolio | 23.7k $4.7m | Reduced -18.3k |
| CREDIT AGRICOLE S A 0.02% of their portfolio | 23.7k $4.7m | Added +15.2k |
| Nuveen, LLC 0.00% of their portfolio | 22.7k $4.5m | Added +686 |
| DEAN INVESTMENT ASSOCIATES, LLC 0.59% of their portfolio | 21.1k $4.2m | Reduced -13.4k |
| Swiss National Bank 0.00% of their portfolio | 20.8k $4.1m | Unchanged |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 20.8k $4.1m | Reduced -2.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 19.3k $3.8m | Added +113 |
| Emerald Investment Advisers, LLC 0.34% of their portfolio | 19.1k $3.8m | First filing |
| Creative Planning 0.00% of their portfolio | 18.8k $3.7m | Added +3.8k |
| SG Americas Securities, LLC 0.00% of their portfolio | 17.6k $3.5m | Added +13.0k |
| Rockefeller Capital Management L.P. 0.01% of their portfolio | 17.3k $3.4m | Added +17.2k |
| CASTLEARK MANAGEMENT LLC 0.11% of their portfolio | 16.3k $3.2m | Reduced -16.8k |
| Phocas Financial Corp. 0.47% of their portfolio | 15.3k $3.0m | Reduced -7.8k |
| Dean Capital Management 1.22% of their portfolio | 14.8k $2.9m | Reduced -8.7k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 14.7k $2.9m | New |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.01% of their portfolio | 14.6k $2.9m | Reduced -159 |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 14.6k $2.9m | New |
| TD Asset Management Inc 0.00% of their portfolio | 13.5k $2.7m | Added +1.0k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 13.4k $2.6m | Added +44 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 13.2k $2.6m | Added +3.6k |
| North Star Investment Management Corp. 0.15% of their portfolio | 12.6k $2.5m | Added +12.0k |
| BRIDGES INVESTMENT MANAGEMENT INC 0.03% of their portfolio | 12.4k $2.5m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 12.2k $2.4m | Added +9.9k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 11.8k $2.3m | Reduced -3.0k |
| Legato Capital Management LLC 0.21% of their portfolio | 11.5k $2.3m | Reduced -889 |
| Integrated Quantitative Investments LLC 0.41% of their portfolio | 11.5k $2.3m | Added +8.8k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 11.2k $1.9m | Added +546 |
| Expect Equity LLC 1.70% of their portfolio | 11.1k $2.2m | Reduced -7.5k |
| RITHOLTZ WEALTH MANAGEMENT 0.04% of their portfolio | 11.0k $2.2m | Reduced -276 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 10.3k $2.0m | Added +89 |
| Precision Wealth Strategies, LLC 0.62% of their portfolio | 9.4k $1.9m | New |
| PINNACLE ASSOCIATES LTD 0.02% of their portfolio | 8.9k $1.8m | Reduced -1.1k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 8.8k $1.7m | Added +749 |
| CenterBook Partners LP 0.09% of their portfolio | 8.7k $1.7m | New |
| Oliver Luxxe Assets LLC 0.24% of their portfolio | 8.1k $1.6m | Added +18 |
| Legal & General Group Plc 0.00% of their portfolio | 7.9k $1.6m | Reduced -1.2k |
| B. Metzler seel. Sohn & Co. AG 0.01% of their portfolio | 7.6k $1.5m | Added +2.7k |
| XTX Topco Ltd 0.03% of their portfolio | 7.4k $1.5m | New |
| CORSAIR CAPITAL MANAGEMENT, L.P. 0.21% of their portfolio | 7.2k $1.4m | Unchanged |
| Sowell Financial Services LLC 0.05% of their portfolio | 7.2k $1.4m | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 7.1k $1.4m | First filing |
| PFG Advisors 0.07% of their portfolio | 6.9k $1.4m | Added +289 |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 6.6k $1.3m | Added +1.7k |