IDT CORP-CLASS B (IDT) Top Institutional Shareholders
IDT CORP-CLASS B (IDT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $628.02M in IDT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of IDT tracked by InsiderSet, reporting ownership valued at approximately $87.10M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $95.49M, representing an estimated gain of +9.63% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% of the total disclosed IDT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Renaissance Technologies LLC, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in IDT CORP-CLASS B (IDT).
This page ranks the largest institutional IDT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
196
Total Reported Value
$628.02M
Largest Holder
Blackrock, Inc.
Largest Position
$87.10M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
153
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 1,773,958 | $87,101,322 | $95,492,159 | +$8,390,837 | +9.63% | |
| Renaissance Technologies LLC | Jim Simons | 0.07% | 946,013 | $46,449,238 | $50,923,880 | +$4,474,642 | +9.63% |
| Vanguard Capital Management Llc | 0.00% | 881,088 | $43,261,421 | $47,428,967 | +$4,167,546 | +9.63% | |
| Dimensional Fund Advisors Lp | 0.01% | 788,047 | $38,693,385 | $42,420,570 | +$3,727,185 | +9.63% | |
| Geode Capital Management, Llc | 0.00% | 604,728 | $29,697,153 | $32,552,508 | +$2,855,355 | +9.61% | |
| State Street Corp | 0.00% | 534,508 | $26,244,343 | $28,772,566 | +$2,528,223 | +9.63% | |
| Cooke & Bieler Lp | 0.23% | 409,386 | $20,100,853 | $22,037,248 | +$1,936,395 | +9.63% | |
| Deutsche Bank Ag\ | 0.01% | 384,957 | $18,901,389 | $20,722,235 | +$1,820,846 | +9.63% | |
| Kahn Brothers Group | Thomas Graham, Alan, Irving Kahns | 3.24% | 372,566 | $18,292,990 | $20,055,228 | +$1,762,238 | +9.63% |
| Jacobs Levy Equity Management, Inc | 0.06% | 291,451 | $14,310,244 | $15,688,807 | +$1,378,563 | +9.63% | |
| Charles Schwab Investment Management Inc | 0.00% | 285,758 | $14,030,718 | $15,382,353 | +$1,351,635 | +9.63% | |
| Vanguard Portfolio Management Llc | 0.00% | 250,030 | $12,276,473 | $13,459,115 | +$1,182,642 | +9.63% | |
| D. E. Shaw & Co., Inc. | 0.01% | 238,338 | $11,702,396 | $12,829,735 | +$1,127,339 | +9.63% | |
| Morgan Stanley | 0.00% | 234,661 | $11,521,904 | $12,631,802 | +$1,109,898 | +9.63% | |
| Millennium Management Llc | 0.01% | 222,925 | $10,945,618 | $12,000,053 | +$1,054,435 | +9.63% | |
| Nuveen, Llc | 0.00% | 220,806 | $10,841,575 | $11,885,987 | +$1,044,412 | +9.63% | |
| Jane Street Group, Llc | 0.01% | 195,961 | $9,621,685 | $10,548,581 | +$926,896 | +9.63% | |
| Two Sigma Investments, Lp | 0.01% | 179,497 | $8,813,303 | $9,662,324 | +$849,021 | +9.63% | |
| Wealth Enhancement Advisory Services, Llc | 0.02% | 181,423 | $8,793,552 | $9,766,000 | +$972,448 | +11.06% | |
| Qube Research & Technologies Ltd | 0.01% | 160,534 | $7,882,219 | $8,641,545 | +$759,326 | +9.63% | |
| Northern Trust Corp | 0.00% | 157,832 | $7,749,550 | $8,496,097 | +$746,547 | +9.63% | |
| Royce & Associates Lp | 0.07% | 144,628 | $7,101,235 | $7,785,325 | +$684,090 | +9.63% | |
| Cerity Partners Llc | 0.01% | 142,815 | $7,012,216 | $7,687,731 | +$675,515 | +9.63% | |
| Goldman Sachs Group Inc | 0.00% | 140,765 | $6,911,561 | $7,577,380 | +$665,819 | +9.63% | |
| Vanguard Fiduciary Trust Co | 0.00% | 136,696 | $6,711,774 | $7,358,346 | +$646,572 | +9.63% | |
| Fmr Llc | 0.00% | 127,318 | $6,251,332 | $6,853,528 | +$602,196 | +9.63% | |
| Bank Of New York Mellon Corp | 0.00% | 117,607 | $5,774,498 | $6,330,785 | +$556,287 | +9.63% | |
| Citadel Advisors Llc | 0.00% | 115,840 | $5,687,744 | $6,235,667 | +$547,923 | +9.63% | |
| Point72 Asset Management, L.P. | 0.01% | 109,796 | $5,390,984 | $5,910,319 | +$519,335 | +9.63% | |
| Ubs Group Ag | 0.00% | 107,270 | $5,266,958 | $5,774,344 | +$507,386 | +9.63% | |
| Alta Fox Capital Management | Connor Haley | 1.26% | 97,010 | $4,763,191 | $5,222,048 | +$458,857 | +9.63% |
| American Century Companies Inc | 0.00% | 93,605 | $4,596,005 | $5,038,757 | +$442,752 | +9.63% | |
| Aqr Capital Management Llc | 0.00% | 91,533 | $4,494,252 | $4,927,221 | +$432,969 | +9.63% | |
| Man Group Plc | 0.01% | 89,589 | $4,398,820 | $4,822,576 | +$423,756 | +9.63% | |
| Russell Investments Group, Ltd. | 0.00% | 88,826 | $4,361,441 | $4,781,504 | +$420,063 | +9.63% | |
| Lazard Asset Management Llc | 0.01% | 87,968 | $4,319,229 | $4,735,317 | +$416,088 | +9.63% | |
| Panagora Asset Management Inc | 0.01% | 74,574 | $3,661,583 | $4,014,318 | +$352,735 | +9.63% | |
| Franklin Resources Inc | 0.00% | 62,624 | $3,074,839 | $3,371,050 | +$296,211 | +9.63% | |
| First Trust Advisors Lp | 0.00% | 61,044 | $2,997,260 | $3,285,999 | +$288,739 | +9.63% | |
| Veradace Capital Management Llc | 2.63% | 60,179 | $2,954,789 | $3,239,436 | +$284,647 | +9.63% | |
| Barclays Plc | 0.00% | 59,718 | $2,932,154 | $3,214,620 | +$282,466 | +9.63% | |
| Bank Of America Corp | 0.00% | 52,122 | $2,559,190 | $2,805,727 | +$246,537 | +9.63% | |
| Alliancebernstein L.P. | 0.00% | 49,922 | $2,556,506 | $2,687,301 | +$130,795 | +5.12% | |
| Engineers Gate Manager Lp | 0.03% | 51,177 | $2,512,791 | $2,754,858 | +$242,067 | +9.63% | |
| Martingale Asset Management L P | 0.06% | 48,985 | $2,405,164 | $2,636,863 | +$231,699 | +9.63% | |
| Emmett Investment Management, Lp | 1.59% | 42,078 | $2,073,183 | $2,265,059 | +$191,876 | +9.26% | |
| Swiss National Bank | 0.00% | 42,000 | $2,062,200 | $2,260,860 | +$198,660 | +9.63% | |
| Hsbc Holdings Plc | 0.00% | 37,125 | $1,835,831 | $1,998,439 | +$162,608 | +8.86% | |
| Victory Capital Management Inc | 0.00% | 36,451 | $1,789,744 | $1,962,157 | +$172,413 | +9.63% | |
| Magnetar Financial Llc | 0.02% | 35,902 | $1,762,788 | $1,932,605 | +$169,817 | +9.63% |
Frequently asked questions about IDT
Who owns the most IDT stock?
The largest holders of IDT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for IDT CORP-CLASS B (IDT).
Is IDT widely held by superinvestors?
Many widely followed stocks like IDT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly IDT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.