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 ($2.0m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $332.30. Options: 7 managers hold calls ($64.8m notional), 5 hold puts ($8.5m).
Trends to Q2 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 |
| Q2 2026 | 277 |
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 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 |
| Q2 2026 | 189 | 96 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $12.1m | $747.4k | 0.06 |
| Q4 2025 | $15.0m | $831.2k | 0.06 |
| Q1 2026 | $25.9m | $1.7m | 0.07 |
| Q2 2026 | $64.8m | $8.5m | 0.13 |
Biggest buyers
| Bank of New York Mellon Corp | Added | +338.7k |
| JENNISON ASSOCIATES LLC | New | +292.1k |
| FMR LLC | Added | +244.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +242.2k |
| WESTWOOD HOLDINGS GROUP INC | New | +194.2k |
| FRANKLIN RESOURCES INC | Added | +185.9k |
| BlackRock, Inc. | Added | +175.3k |
| Allspring Global Investments Holdings, LLC | Added | +103.6k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Added | +91.9k |
| Alyeska Investment Group, L.P. | New | +91.5k |
Biggest sellers
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Sold out | -123.5k |
| BROWN ADVISORY INC | Reduced | -79.8k |
| Thrivent Financial for Lutherans | Reduced | -76.3k |
| LOOMIS SAYLES & CO L P | Reduced | -44.6k |
| T. Rowe Price Investment Management, Inc. | Reduced | -35.1k |
| GW&K Investment Management, LLC | Reduced | -33.0k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | -32.8k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -32.3k |
| CITADEL ADVISORS LLC | Reduced | -26.6k |
| Fisher Asset Management, LLC | Reduced | -24.9k |
Biggest calls
| JANE STREET GROUP, LLC | New | $26.3m78.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $17.0m51.1k shares |
| CITADEL ADVISORS LLC | Added | $12.7m38.0k shares |
| D. E. Shaw & Co., Inc. | Added | $8.4m25.3k shares |
| SIMPLEX TRADING, LLC | New | $299.7k900 shares |
| GROUP ONE TRADING LLC | New | $66.6k200 shares |
| Belvedere Trading LLC | New | $66.6k200 shares |
Biggest puts
| D. E. Shaw & Co., Inc. | Added | $5.3m15.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.3m6.9k shares |
| CITADEL ADVISORS LLC | Reduced | $433.0k1.3k shares |
| JANE STREET GROUP, LLC | New | $433.0k1.3k shares |
| SIMPLEX TRADING, LLC | New | $66.6k200 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 since 1 Apr 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q2 2026 | 0 | — | 1 | $198.2k | — |
| Q3 2026 | 0 | — | 2 | $476.9k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-14 | Vellucci Vincent Director | Sold | $235.2k1.0k shares |
| 2026-09-02 | Vellucci Vincent Director | Sold | $95.7k393 shares |
| 2026-08-12 | GILBERT PETER E Director · By wife | Sold | $146.1k500 shares |
| 2026-06-01 | Kozlovsky Suzanne Global Head of People | Sold | $198.2k731 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 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 1.0m $340.5m | Added +175.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.03% of their portfolio | 1.0m $338.3m | Added +242.2k |
| FMR LLC 0.01% of their portfolio | 876.1k $291.8m | Added +244.8k |
| Jupiter Topco LLC 0.08% of their portfolio | 590.0k $196.5m | First filing |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 555.5k $185.0m | Added +66.4k |
| T. Rowe Price Investment Management, Inc. 0.12% of their portfolio | 537.8k $179.1m | Reduced -35.1k |
| WASATCH ADVISORS LP 1.07% of their portfolio | 489.4k $163.0m | Added +10.7k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 399.1k $132.9m | Added +69.6k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 389.9k $129.9m | Added +338.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 363.3k $121.0m | Added +55.3k |
| FRANKLIN RESOURCES INC 0.02% of their portfolio | 300.2k $100.0m | Added +185.9k |
| JENNISON ASSOCIATES LLC 0.06% of their portfolio | 292.1k $97.3m | New |
| STATE STREET CORP 0.00% of their portfolio | 280.5k $93.4m | Added +38.1k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 260.7k $86.8m | Added +3.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 243.3k $77.0m | Reduced -6.1k |
| Tidal Investments LLC 0.17% of their portfolio | 211.8k $70.5m | Added +70.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.10% of their portfolio | 207.7k $69.2m | Reduced -6.1k |
| Tema ETFs LLC 2.18% of their portfolio | 202.8k $67.6m | First filing |
| Allspring Global Investments Holdings, LLC 0.10% of their portfolio | 198.4k $63.1m | Added +103.6k |
| WESTWOOD HOLDINGS GROUP INC 0.49% of their portfolio | 194.2k $64.7m | New |
| Fisher Asset Management, LLC 0.02% of their portfolio | 190.8k $63.5m | Reduced -24.9k |
| LORD, ABBETT & CO. LLC 0.18% of their portfolio | 189.3k $63.0m | Added +21.9k |
| BESSEMER GROUP INC 0.07% of their portfolio | 158.1k $52.7m | Added +20.8k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.07% of their portfolio | 142.8k $47.6m | Added +91.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 124.2k $41.4m | Added +19.3k |
| ADVISORY RESEARCH INC 3.92% of their portfolio | 117.9k $39.3m | Reduced -1.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 112.6k $37.5m | Added +14.9k |
| Thrivent Financial for Lutherans 0.06% of their portfolio | 111.7k $37.2m | Reduced -76.3k |
| Invesco Ltd. 0.00% of their portfolio | 105.3k $35.1m | Added +31.2k |
| LOOMIS SAYLES & CO L P 0.04% of their portfolio | 101.0k $33.6m | Reduced -44.6k |
| GW&K Investment Management, LLC 0.25% of their portfolio | 97.4k $32.4m | Reduced -33.0k |
| Alyeska Investment Group, L.P. 0.08% of their portfolio | 91.5k $30.5m | New |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 88.1k $29.3m | Added +17.3k |
| ROYCE & ASSOCIATES LP 0.23% of their portfolio | 87.1k $29.0m | Reduced -10.1k |
| Daiwa Securities Group Inc. 0.07% of their portfolio | 86.6k $28.8m | New |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 81.6k $27.2m | Added +46.6k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.02% of their portfolio | 79.0k $26.3m | Added +19.0k |
| Boston Partners 0.02% of their portfolio | 78.6k $26.2m | Added +13.2k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 77.1k $25.7m | New |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 74.2k $24.7m | Added +35.8k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 70.2k $23.4m | Reduced -14.0k |
| SANTA MONICA PARTNERS LP 12.15% of their portfolio | 67.6k $22.5m | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 62.3k $20.7m | Added +1.1k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 61.5k $20.5m | Added +51.2k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 59.6k $19.8m | New |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 56.6k $18.9m | Reduced -1.4k |
| Portolan Capital Management, LLC 0.60% of their portfolio | 47.9k $15.9m | Reduced -5.3k |
| UBS Group AG 0.00% of their portfolio | 41.1k $13.7m | Reduced -16.1k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 39.3k $13.1m | Added +4.9k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 37.5k $12.5m | Added +13.0k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 37.3k $12.4m | Added +1.6k |
| LPL Financial LLC 0.00% of their portfolio | 36.1k $12.0m | Added +2.5k |
| Nuveen, LLC 0.00% of their portfolio | 34.9k $11.6m | Added +12.2k |
| POLEN CAPITAL MANAGEMENT LLC 0.09% of their portfolio | 32.8k $10.9m | Reduced -10.5k |
| Grandeur Peak Global Advisors, LLC 2.51% of their portfolio | 32.6k $10.8m | Reduced -4.3k |
| Ghisallo Capital Management LLC 0.20% of their portfolio | 30.0k $10.0m | New |
| SG Capital Management LLC 0.81% of their portfolio | 26.9k $9.0m | New |
| Emerald Investment Advisers, LLC 0.57% of their portfolio | 25.8k $8.6m | Added +6.7k |
| Nitor Capital Management LLC 5.71% of their portfolio | 25.4k $8.5m | Unchanged |
| INVESTORS ASSET MANAGEMENT OF GEORGIA INC /GA/ /ADV 2.86% of their portfolio | 24.7k $8.2m | Reduced -99 |
| Swiss National Bank 0.00% of their portfolio | 24.2k $8.1m | Added +3.4k |
| CREDIT AGRICOLE S A 0.02% of their portfolio | 23.7k $7.9m | Unchanged |
| Ballast Asset Management, LP 3.12% of their portfolio | 23.5k $7.8m | Reduced -234 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 22.2k $7.4m | Added +2.9k |
| Rockefeller Capital Management L.P. 0.01% of their portfolio | 22.0k $7.3m | Added +4.8k |
| Creative Planning 0.00% of their portfolio | 21.5k $7.2m | Added +2.6k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 20.6k $6.8m | Reduced -9.0k |
| SEVEN GRAND MANAGERS, LLC 0.27% of their portfolio | 20.0k $6.7m | New |
| NATIXIS 0.03% of their portfolio | 19.6k $6.5m | New |
| Informed Momentum Co LLC 0.56% of their portfolio | 18.9k $6.3m | Reduced -5.1k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 18.3k $6.1m | Added +13.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 18.1k $6.0m | Added +13.0k |
| HERALD INVESTMENT MANAGEMENT Ltd 0.81% of their portfolio | 17.9k $6.0m | Reduced -12.1k |
| Public Sector Pension Investment Board 0.02% of their portfolio | 17.4k $5.8m | New |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 17.2k $5.7m | Added +2.5k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 15.5k $5.2m | Reduced -5.3k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.02% of their portfolio | 14.8k $4.9m | Added +237 |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 14.8k $4.9m | Added +1.5k |
| Phocas Financial Corp. 0.67% of their portfolio | 14.5k $4.8m | Reduced -756 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 14.4k $2.9m | Added +3.2k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 14.0k $4.7m | Added +5.2k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 13.1k $4.4m | Reduced -109 |
| TD Asset Management Inc 0.00% of their portfolio | 12.8k $4.3m | Reduced -728 |
| North Star Investment Management Corp. 0.23% of their portfolio | 12.6k $4.2m | Unchanged |
| BRIDGES INVESTMENT MANAGEMENT INC 0.05% of their portfolio | 12.5k $4.2m | Added +54 |
| SG Americas Securities, LLC 0.00% of their portfolio | 11.5k $3.8m | Reduced -6.1k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 11.3k $3.8m | Reduced -478 |
| Montanaro Asset Management Ltd 1.16% of their portfolio | 11.0k $3.7m | New |
| CITIGROUP INC 0.00% of their portfolio | 10.9k $3.6m | Added +6.6k |
| RITHOLTZ WEALTH MANAGEMENT 0.05% of their portfolio | 10.7k $3.6m | Reduced -271 |
| B. Metzler seel. Sohn & Co. AG 0.03% of their portfolio | 10.4k $3.5m | Added +2.8k |
| Legal & General Group Plc 0.00% of their portfolio | 9.8k $3.3m | Added +1.9k |
| HighTower Advisors, LLC 0.00% of their portfolio | 9.3k $3.1m | New |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.00% of their portfolio | 8.5k $2.8m | Added +4.2k |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.01% of their portfolio | 8.1k $2.7m | Added +8.0k |
| DARK FOREST CAPITAL MANAGEMENT LP 0.17% of their portfolio | 7.9k $2.6m | Added +6.8k |
| CAXTON ASSOCIATES LLP 0.05% of their portfolio | 7.8k $2.6m | Added +2.7k |
| Sowell Financial Services LLC 0.08% of their portfolio | 7.8k $2.6m | Added +579 |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 7.7k $2.4m | Added +4.6k |
| Expect Equity LLC 1.65% of their portfolio | 7.7k $2.6m | Reduced -3.3k |