Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in BELFB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 847K | $167.7M | -2.2% | 6.700% | 0.00% |
| 2 | JANUS HENDERSON GROUP PLC | 760K | $150.6M | +22.7% | 6.014% | 0.07% |
| 3 | FMR LLC | 631K | $125.0M | -5.5% | 4.995% | 0.01% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 489K | $96.8M | — | 3.869% | 0.00% |
| 5 | WASATCH ADVISORS INC | 479K | $94.8M | +16.6% | 3.787% | 0.63% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 329K | $65.2M | — | 2.607% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 308K | $61.0M | +15.0% | 2.437% | 0.00% |
| 8 | DIMENSIONAL FUND ADVISORS LP | 257K | $50.9M | +0.8% | 2.032% | 0.01% |
| 9 | STATE STREET CORP | 242K | $48.0M | -1.8% | 1.918% | 0.00% |
| 10 | Fisher Asset Management, LLC | 216K | $42.7M | -14.3% | 1.706% | 0.01% |
| 11 | RENAISSANCE TECHNOLOGIES LLC | 214K | $42.3M | -7.6% | 1.692% | 0.07% |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 156K | $30.8M | +211.0% | 1.232% | 0.00% |
| 13 | LOOMIS SAYLES & CO L P | 146K | $28.8M | -27.4% | 1.152% | 0.04% |
| 14 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 123K | $24.5M | -11.2% | 0.977% | 0.01% |
| 15 | ADVISORY RESEARCH INC | 119K | $23.6M | -11.4% | 0.944% | 2.91% |
| 16 | FRANKLIN RESOURCES INC | 114K | $22.6M | +829.6% | 0.905% | 0.01% |
| 17 | NORTHERN TRUST CORP | 105K | $20.8M | +3.9% | 0.830% | 0.00% |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 98K | $19.3M | -2.5% | 0.773% | 0.00% |
| 19 | Allspring Global Investments Holdings, LLC | 95K | $19.3M | +364600.0% | 0.750% | 0.03% |
| 20 | ROYCE & ASSOCIATES LP | 97K | $19.2M | +5.6% | 0.769% | 0.19% |
| 21 | GOLDMAN SACHS GROUP INC | 84K | $16.7M | +3.9% | 0.666% | 0.00% |
| 22 | BROWN ADVISORY INC | 82K | $16.3M | -30.5% | 0.650% | 0.03% |
| 23 | Invesco Ltd. | 74K | $14.7M | -56.3% | 0.586% | 0.00% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 71K | $14.0M | — | 0.560% | 0.00% |
| 25 | Boston Partners | 65K | $13.0M | +4.5% | 0.518% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in BELFB — a direct measure of their conviction.
Filings activity in BELFB during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 228 | +12% | 42.04% | +5.28 pp | $1.56B | +14% |
| Q4 2025 | 204 | +3.6% | 36.76% | +7.55 pp | $1.37B | +26% |
| Q3 2025 | 197 | +15% | 29.21% | +7.27 pp | $1.08B | +33% |
| Q2 2025 | 171 | +4.3% | 21.94% | +5.67 pp | $815M | +35% |
| Q1 2025 | 164 | 1.8% | 16.27% | 0.76 pp | $604M | 4.5% |
| Q4 2024 | 167 | +1.8% | 17.03% | +1.59 pp | $632M | +10% |
| Q3 2024 | 164 | +4.5% | 15.44% | +2.90 pp | $574M | +23% |
| Q2 2024 | 157 | — | 12.54% | — | $466M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying BELFB stock.
Based on Q1 2026 13F filings, institutional ownership of Bel Fuse Inc. stands at 42.0%, held across 228 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of BELFB, with approximately 846,920 shares worth $0.17B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of BELFB, including Fisher Asset Management, LLC, RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for BELFB is 75 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
59 institutions opened new positions in BELFB during Q1 2026, while 35 fully exited. 132 added to existing positions and 36 trimmed.
BELFB institutional ownership rose by 5.28 percentage points quarter-over-quarter, with a net change of +24 holders.
The top 10 institutions account for 57.8% of all reported 13F value in BELFB, and the top 25 account for 78.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Bel Fuse Inc. (BELFB) Institutional Ownership