IDT CORP-CLASS B (IDT) 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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $803.93M 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 $111.87M in its June 30, 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 $132.82M, representing an estimated gain of +18.72% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 54% of the total disclosed IDT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Renaissance Technologies 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
192
Total Reported Value
$803.93M
Largest Holder
Blackrock, Inc.
Largest Position
$111.87M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
41
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% | 1,923,496 | $111,870,508 | $132,817,399 | +$20,946,891 | +18.72% | |
| Vanguard Capital Management Llc | 0.00% | 887,211 | $51,600,192 | $61,261,920 | +$9,661,728 | +18.72% | |
| Renaissance Technologies LLC | Jim Simons | 0.07% | 879,008 | $51,123,105 | $60,695,502 | +$9,572,397 | +18.72% |
| Dimensional Fund Advisors Lp | 0.01% | 779,838 | $45,355,280 | $53,847,814 | +$8,492,534 | +18.72% | |
| Geode Capital Management, Llc | 0.00% | 653,066 | $37,988,754 | $45,094,207 | +$7,105,453 | +18.70% | |
| State Street Corp | 0.00% | 616,837 | $35,875,240 | $42,592,595 | +$6,717,355 | +18.72% | |
| First Trust Advisors Lp | 0.02% | 512,873 | $29,828,694 | $35,413,881 | +$5,585,187 | +18.72% | |
| American Century Companies Inc | 0.01% | 416,982 | $24,251,673 | $28,792,607 | +$4,540,934 | +18.72% | |
| Deutsche Bank Ag\ | 0.01% | 386,746 | $22,493,147 | $26,704,811 | +$4,211,664 | +18.72% | |
| Kahn Brothers Group | Thomas Graham, Alan, Irving Kahns | 3.23% | 351,660 | $20,452,545 | $24,282,123 | +$3,829,578 | +18.72% |
| Morgan Stanley | 0.00% | 343,468 | $19,976,123 | $23,716,465 | +$3,740,342 | +18.72% | |
| D. E. Shaw & Co., Inc. | 0.01% | 295,788 | $17,203,030 | $20,424,161 | +$3,221,131 | +18.72% | |
| Jacobs Levy Equity Management, Inc | 0.06% | 279,425 | $16,251,358 | $19,294,296 | +$3,042,938 | +18.72% | |
| Nuveen, Llc | 0.00% | 272,064 | $15,823,243 | $18,786,019 | +$2,962,776 | +18.72% | |
| Charles Schwab Investment Management Inc | 0.00% | 255,279 | $14,847,027 | $17,627,015 | +$2,779,988 | +18.72% | |
| Vanguard Portfolio Management Llc | 0.00% | 244,757 | $14,235,067 | $16,900,471 | +$2,665,404 | +18.72% | |
| Cooke & Bieler Lp | 0.16% | 242,039 | $14,076,988 | $16,712,793 | +$2,635,805 | +18.72% | |
| Aqr Capital Management Llc | 0.00% | 186,228 | $10,831,003 | $12,859,043 | +$2,028,040 | +18.72% | |
| Wealth Enhancement Advisory Services, Llc | 0.02% | 160,080 | $9,780,883 | $11,053,524 | +$1,272,641 | +13.01% | |
| Northern Trust Corp | 0.00% | 167,872 | $9,763,435 | $11,591,562 | +$1,828,127 | +18.72% | |
| Millennium Management Llc | 0.01% | 167,669 | $9,751,629 | $11,577,544 | +$1,825,915 | +18.72% | |
| Two Sigma Investments, Lp | 0.01% | 159,819 | $9,295,073 | $11,035,502 | +$1,740,429 | +18.72% | |
| Cerity Partners Llc | 0.01% | 148,010 | $8,608,263 | $10,220,091 | +$1,611,828 | +18.72% | |
| Goldman Sachs Group Inc | 0.00% | 143,921 | $8,370,429 | $9,937,745 | +$1,567,316 | +18.72% | |
| Ubs Group Ag | 0.00% | 142,293 | $8,275,761 | $9,825,332 | +$1,549,571 | +18.72% | |
| Vanguard Fiduciary Trust Co | 0.00% | 140,465 | $8,169,444 | $9,699,108 | +$1,529,664 | +18.72% | |
| Panagora Asset Management Inc | 0.02% | 131,172 | $7,628,964 | $9,057,427 | +$1,428,463 | +18.72% | |
| Fmr Llc | 0.00% | 130,657 | $7,599,038 | $9,021,866 | +$1,422,828 | +18.72% | |
| Algert Global Llc | 0.09% | 128,504 | $7,473,793 | $8,873,201 | +$1,399,408 | +18.72% | |
| Jane Street Group, Llc | 0.00% | 123,676 | $7,192,996 | $8,539,828 | +$1,346,832 | +18.72% | |
| Bank Of New York Mellon Corp | 0.00% | 119,978 | $6,977,943 | $8,284,481 | +$1,306,538 | +18.72% | |
| Csm Advisors, Llc | 0.13% | 103,405 | $6,013,000 | $7,140,115 | +$1,127,115 | +18.74% | |
| Alta Fox Capital Management | Connor Haley | 1.13% | 97,010 | $5,642,102 | $6,698,541 | +$1,056,439 | +18.72% |
| Jpmorgan Chase & Co | 0.00% | 97,271 | $5,636,855 | $6,716,563 | +$1,079,708 | +19.15% | |
| Citadel Advisors Llc | 0.00% | 96,634 | $5,620,233 | $6,672,578 | +$1,052,345 | +18.72% | |
| Norges Bank | 0.00% | 95,600 | $5,560,096 | $6,601,180 | +$1,041,084 | +18.72% | |
| Hrt Financial Lp | 0.01% | 92,105 | $5,356,000 | $6,359,850 | +$1,003,850 | +18.74% | |
| Lazard Asset Management Llc | 0.01% | 90,663 | $5,272,960 | $6,260,280 | +$987,320 | +18.72% | |
| Russell Investments Group, Ltd. | 0.00% | 82,958 | $4,824,859 | $5,728,250 | +$903,391 | +18.72% | |
| Point72 Asset Management, L.P. | 0.01% | 71,130 | $4,136,921 | $4,911,527 | +$774,606 | +18.72% | |
| Veradace Capital Management Llc | 2.97% | 64,589 | $3,756,496 | $4,459,870 | +$703,374 | +18.72% | |
| Barclays Plc | 0.00% | 57,083 | $3,319,947 | $3,941,581 | +$621,634 | +18.72% | |
| Martingale Asset Management L P | 0.07% | 52,788 | $3,070,151 | $3,645,011 | +$574,860 | +18.72% | |
| Alliancebernstein L.P. | 0.00% | 57,589 | $2,827,620 | $3,976,520 | +$1,148,900 | +40.63% | |
| Bank Of America Corp | 0.00% | 48,310 | $2,809,710 | $3,335,806 | +$526,096 | +18.72% | |
| Hsbc Holdings Plc | 0.00% | 47,280 | $2,732,784 | $3,264,684 | +$531,900 | +19.46% | |
| Emmett Investment Management, Lp | 1.78% | 43,766 | $2,536,240 | $3,022,042 | +$485,802 | +19.15% | |
| Swiss National Bank | 0.00% | 41,300 | $2,402,008 | $2,851,765 | +$449,757 | +18.72% | |
| Man Group Plc | 0.00% | 39,701 | $2,309,011 | $2,741,354 | +$432,343 | +18.72% | |
| Balyasny Asset Management L.P. | 0.00% | 38,925 | $2,263,878 | $2,687,771 | +$423,893 | +18.72% |
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.