Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in IDT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 1.8M | $87.1M | +2.6% | 7.133% | 0.00% |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 946K | $46.4M | -2.9% | 3.804% | 0.07% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 881K | $43.3M | — | 3.543% | 0.00% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 788K | $38.7M | -2.3% | 3.169% | 0.01% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 605K | $29.7M | +8.0% | 2.432% | 0.00% |
| 6 | STATE STREET CORP | 535K | $26.2M | +9.3% | 2.149% | 0.00% |
| 7 | COOKE & BIELER LP | 409K | $20.1M | +4.7% | 1.646% | 0.23% |
| 8 | DEUTSCHE BANK AG\ | 385K | $18.9M | +2.8% | 1.548% | 0.01% |
| 9 | KAHN BROTHERS GROUP INC /DE/ | 373K | $18.3M | -5.0% | 1.498% | 3.24% |
| 10 | JACOBS LEVY EQUITY MANAGEMENT, INC | 291K | $14.3M | -0.4% | 1.172% | 0.06% |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 286K | $14.0M | -4.7% | 1.149% | 0.00% |
| 12 | VANGUARD PORTFOLIO MANAGEMENT LLC | 250K | $12.3M | — | 1.005% | 0.00% |
| 13 | D. E. Shaw & Co., Inc. | 238K | $11.7M | +1.6% | 0.958% | 0.01% |
| 14 | MORGAN STANLEY | 235K | $11.5M | +3.5% | 0.944% | 0.00% |
| 15 | MILLENNIUM MANAGEMENT LLC | 223K | $10.9M | -18.8% | 0.896% | 0.01% |
| 16 | Nuveen, LLC | 221K | $10.8M | +35.0% | 0.888% | 0.00% |
| 17 | JANE STREET GROUP, LLC | 196K | $9.6M | +63.6% | 0.788% | 0.09% |
| 18 | TWO SIGMA INVESTMENTS, LP | 179K | $8.8M | +117.4% | 0.722% | 0.01% |
| 19 | WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | 181K | $8.8M | -45.1% | 0.730% | 0.02% |
| 20 | Qube Research & Technologies Ltd | 161K | $7.9M | -33.7% | 0.645% | 0.01% |
| 21 | NORTHERN TRUST CORP | 158K | $7.7M | +2.5% | 0.635% | 0.00% |
| 22 | ROYCE & ASSOCIATES LP | 145K | $7.1M | -16.1% | 0.582% | 0.07% |
| 23 | Cerity Partners LLC | 143K | $7.0M | +0.4% | 0.574% | 0.01% |
| 24 | GOLDMAN SACHS GROUP INC | 141K | $6.9M | +14.8% | 0.566% | 0.00% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 137K | $6.7M | — | 0.550% | 0.00% |
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 IDT — a direct measure of their conviction.
Filings activity in IDT 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 | 195 | +1.0% | 46.24% | 1.02 pp | $628M | 2.2% |
| Q4 2025 | 193 | +2.7% | 47.26% | 1.33 pp | $642M | 2.7% |
| Q3 2025 | 188 | +0.5% | 48.59% | 14.28 pp | $660M | 23% |
| Q2 2025 | 187 | +11% | 62.87% | +18.34 pp | $854M | +41% |
| Q1 2025 | 168 | +2.4% | 44.53% | 20.10 pp | $605M | 31% |
| Q4 2024 | 164 | +13% | 64.63% | +34.64 pp | $878M | +116% |
| Q3 2024 | 145 | +0.7% | 29.99% | +0.34 pp | $407M | +1.1% |
| Q2 2024 | 144 | — | 29.65% | — | $403M | — |
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 IDT stock.
Based on Q1 2026 13F filings, institutional ownership of IDT Corporation stands at 46.2%, held across 195 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of IDT, with approximately 1,773,958 shares worth $0.09B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of IDT, including RENAISSANCE TECHNOLOGIES LLC, MILLENNIUM MANAGEMENT LLC, JANE STREET GROUP, LLC, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for IDT is 52 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
30 institutions opened new positions in IDT during Q1 2026, while 28 fully exited. 62 added to existing positions and 101 trimmed.
IDT institutional ownership fell by 1.02 percentage points quarter-over-quarter, with a net change of +2 holders.
The top 10 institutions account for 54.6% of all reported 13F value in IDT, and the top 25 account for 77.2%.
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.
IDT Corporation (IDT) Institutional Ownership