Comparable stake leader
DIMENSIONAL FUND ADVISORS LP
SEC ownership of IDT CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001005731.
Disclosed value leader
Howard S. Jonas
Comparable rows
1/50
Latest evidence
15 Oct 2026
- Public ticker
- IDT on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
DIMENSIONAL FUND ADVISORS LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
1 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
DIMENSIONAL FUND ADVISORS LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
15 Oct 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001005731
- Issuer location
- Newark, NJ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of IDT CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
DIMENSIONAL FUND ADVISORS LP
Disclosed value leader
Howard S. Jonas
Comparable rows
1/50
Latest evidence
15 Oct 2026
13D/G
13F
3/4/5
Lead comparable stake: 4.3%
49 rows are not safely comparable across share classes.
13D/G row: DIMENSIONAL FUND ADVISORS LP
Showing 1-8 of 50 holder rows.
Quick read
DIMENSIONAL FUND ADVISORS LP leads the comparable SEC ownership view at 4.3%.
1 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens DIMENSIONAL FUND ADVISORS LP's linked filing trail.
Comparable ownership
Top 1
DIMENSIONAL FUND ADVISORS LP
4.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
4.3%
Reported 13D/G
· 31 Mar 2025
|
$50,349,145
1,011,027 shares
|
$0 | 31 Mar 2025 |
| Howard S. Jonas |
3/4/5
Chairman, Director, 10%+ Owner
|
—
mixed-class rows
|
$146,298,627
4,089,777 shares
mixed-class rows
|
— | 31 Aug 2026 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$111,870,508
1,923,496 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$51,600,192
887,211 shares
|
— | 30 Jun 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
denominator unverified
|
$51,123,105
879,008 shares
|
— | 30 Jun 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$37,988,754
653,066 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$35,875,240
616,837 shares
|
— | 30 Jun 2026 |
| FIRST TRUST ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$29,828,694
512,873 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$7,684,540.
Buys
$0
Insiders: 0
Sells
$7,684,540
Insiders: 9
Net
-$7,684,540
Shares: -122,583
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 122,583
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 37,243 | $0 | $3,028,174 | -$3,028,174 |
| 3-6 | 0 | 38,774 | $0 | $2,275,714 | -$2,275,714 |
| 6-9 | 0 | 28,204 | $0 | $1,435,715 | -$1,435,715 |
| 9-12 | 0 | 18,362 | $0 | $944,937 | -$944,937 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to IDT CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Howard S. Jonas
Net 12M change
-$7,684,539
Latest report
15 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Howard S. Jonas | Chairman, Director, 10%+ Owner | $146,298,627 | Mixed | 31 Aug 2026 | ||
| Samuel Jonas | Chief Executive Officer | $12,260,664 | Mixed | 30 Sep 2024 | ||
| Judah Schorr | Director | $9,434,453 | -$1,122,981 | -11% | Mixed | 14 Oct 2026 |
| Joyce J. Mason | EVP and Corporate Secretary | $5,553,549 | -$631,546 | -10% | Mixed | 07 Oct 2026 |
| Marcelo Fischer | Chief Financial Officer | $3,119,142 | -$2,788,468 | -47% | Mixed | 15 Oct 2026 |
| Bill Pereira | COO & President, Director | $1,980,060 | -$372,876 | -16% | Mixed | 15 Jan 2026 |
| Menachem Ash | EVP of Strategic&Legal Affairs | $1,799,183 | -$1,937,837 | -52% | Mixed | 15 Oct 2026 |
| Michael Chenkin | Director | $1,406,287 | Mixed | 05 Jan 2024 | ||
| Nadine Shea | EVP of GLOBAL HUMAN RESOURCES | $827,709 | -$107,610 | -12% | Mixed | 15 Oct 2026 |
| William Conkling | Director | $33,044 | Mixed | 09 Jun 2026 | ||
| Mitch Silberman | CAO & Controller | $18,256 | -$522,552 | -97% | Mixed | 13 Oct 2026 |
| Eric F. Cosentino | Director | $3,063 | -$68,164 | -96% | Filing P/S | 01 Oct 2026 |
| David Wartell | Chief Technology Officer | $0 | Mixed | 18 Sep 2025 | ||
| Irwin Katsof | Former Director | $0 | -$132,505 | -100% | Mixed | 11 Jun 2026 |
| Elaine S. Yatzkan | Director | Mixed | 13 Dec 2023 |
Recent insider transactions for IDT CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Sale | -11.2% | $365,879 | $80.93 | -4,521 | 35,855 | 16 Oct 2026 | Direct |
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Sale | -11.4% | $394,968 | $82.08 | -4,812 | 37,345 | 15 Oct 2026 | Direct |
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Tax liability | -24% | -12,725 | 40,376 | 15 Oct 2026 | Direct | ||
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Options Exercise | 87.8% | 25,089 | 53,656 | 15 Oct 2026 | Direct | ||
| Marcelo Fischer | IDT | Employee Stock Option | Options Exercise | -33% | -4,257 | 8,633 | 15 Oct 2026 | Direct | ||
| Marcelo Fischer | IDT | Deferred Stock Units | Options Exercise | -66.7% | -10,416 | 5,208 | 15 Oct 2026 | Direct | ||
| Nadine Shea | IDT | Class B Common Stock, par value $.01 per share | Sale | -7.21% | $48,735 | $81.22 | -600 | 7,725 | 15 Oct 2026 | Direct |
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Sale | -20.7% | $410,000 | $82.00 | -5,000 | 19,193 | 15 Oct 2026 | Direct |
| Judah Schorr | IDT | Class B Common Stock, par value $.01 per share | Sale | -6.63% | $629,456 | $81.57 | -7,717 | 108,672 | 15 Oct 2026 | Direct |
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Sale | -100% | $188,556 | $81.03 | -2,327 | 0 | 15 Oct 2026 | Direct |
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Tax liability | -33% | -1,147 | 2,327 | 15 Oct 2026 | Direct | ||
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Options Exercise | 3,474 | 3,474 | 15 Oct 2026 | Direct | |||
| Mitch Silberman | IDT | Deferred Stock Units | Options Exercise | -66.7% | -1,737 | 868 | 15 Oct 2026 | Direct | ||
| Judah Schorr | IDT | Class B Common Stock, par value $.01 per share | Sale | -4.93% | $493,524 | $81.76 | -6,036 | 116,389 | 14 Oct 2026 | Direct |
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Sale | -100% | $66,123 | $82.14 | -805 | 0 | 13 Oct 2026 | Direct |
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -9.18% | $92,570 | $80.50 | -1,150 | 11,372 | 07 Oct 2026 | By Self for Husband |
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Tax liability | -31.3% | -367 | 805 | 07 Oct 2026 | Direct | ||
| Eric F. Cosentino | IDT | Class B Common Stock, $.01 par value per share | Sale | -92.8% | $39,274 | $78.55 | -500 | 39 | 01 Oct 2026 | Direct |
| Nadine Shea | IDT | Class B Common Stock, par value $.01 per share | Sale | -4.58% | $31,214 | $78.04 | -400 | 8,325 | 01 Oct 2026 | Direct |
| Mitch Silberman | IDT | Class B Common Stock, par value $.01 per share | Sale | -74.2% | $267,874 | $79.37 | -3,375 | 1,172 | 01 Oct 2026 | Direct |
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -2.5% | -1,165 | 45,388 | 31 Aug 2026 | Direct | ||
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -3.88% | $31,601 | $62.58 | -505 | 12,522 | 17 Jul 2026 | By Self for Husband |
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -8.96% | $218,195 | $62.56 | -3,488 | 35,441 | 17 Jul 2026 | Direct |
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Sale | -13.1% | $230,752 | $63.17 | -3,653 | 24,193 | 16 Jul 2026 | Direct |
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Sale | -13.6% | $277,085 | $63.02 | -4,397 | 27,846 | 15 Jul 2026 | Direct |
| Eric F. Cosentino | IDT | Class B Common Stock, $.01 par value per share | Sale | -48.1% | $28,890 | $57.78 | -500 | 539 | 30 Jun 2026 | Direct |
| Marcelo Fischer | IDT | Class B Common Stock, $.01 par value per share | Sale | -41.5% | $1,329,024 | $56.98 | -23,323 | 32,824 | 26 Jun 2026 | Direct |
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -4.55% | -2,217 | 46,553 | 23 Jun 2026 | Direct | ||
| Irwin Katsof | IDT | Class B Common Stock, par value $.01 per share | Sale | -100% | $132,506 | $55.03 | -2,408 | 0 | 11 Jun 2026 | Direct |
| William Conkling | IDT | Class B Common Stock, $.01 par value per share | Award | 673 | 673 | 09 Jun 2026 | Direct | |||
| Nadine Shea | IDT | Class B Common Stock, par value $.01 per share | Sale | -5.42% | $27,661 | $55.32 | -500 | 8,725 | 08 Jun 2026 | Direct |
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Gift | 2.51% | 722 | 29,430 | 07 May 2026 | By Self for Son | ||
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Gift | 5.87% | 722 | 13,027 | 07 May 2026 | By Self for Husband | ||
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Gift | 1.89% | 722 | 38,929 | 07 May 2026 | Direct | ||
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -14% | -7,942 | 48,770 | 07 May 2026 | Direct | ||
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -2.03% | -1,175 | 56,712 | 05 May 2026 | Direct | ||
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -1.03% | -600 | 57,887 | 16 Apr 2026 | Direct | ||
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -6.86% | $46,206 | $50.94 | -907 | 12,305 | 16 Apr 2026 | By Self for Husband |
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -5.67% | $117,009 | $50.94 | -2,297 | 38,207 | 16 Apr 2026 | Direct |
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Sale | -38.3% | $1,020,000 | $51.00 | -20,000 | 32,243 | 14 Apr 2026 | Direct |
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Sale | -8.18% | $252,500 | $50.50 | -5,000 | 56,147 | 14 Apr 2026 | Direct |
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Tax liability | -0.66% | -347 | 52,243 | 17 Feb 2026 | Direct | ||
| Menachem Ash | IDT | Class B Common Stock, $.01 par value per share | Options Exercise | 1.61% | 834 | 52,590 | 17 Feb 2026 | Direct | ||
| Menachem Ash | IDT | Deferred Stock Units | Options Exercise | -16.7% | -834 | 4,166 | 17 Feb 2026 | Direct | ||
| Howard S. Jonas | IDT | Class B Common Stock, $.01 par value per share | Gift | -3.65% | -2,214 | 58,487 | 28 Jan 2026 | Direct | ||
| Joyce J. Mason | IDT | Class B Common Stock, par value $.01 per share | Sale | -8.03% | $125,964 | $50.28 | -2,505 | 28,708 | 16 Jan 2026 | By Self for Son |
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Options Exercise | 9.3% | 5,204 | 61,147 | 16 Jan 2026 | Direct | ||
| Marcelo Fischer | IDT | Employee Stock Option (right to buy) | Options Exercise | -28.8% | -5,204 | 12,890 | 16 Jan 2026 | Direct | ||
| Bill Pereira | IDT | Class B Common Stock, $.01 par value per share | Sale | -17.2% | $372,876 | $51.17 | -7,287 | 35,213 | 15 Jan 2026 | Direct |
| Marcelo Fischer | IDT | Class B Common Stock, par value $.01 per share | Sale | -1.62% | $47,879 | $52.04 | -920 | 55,943 | 15 Jan 2026 | Direct |
* marks a reported price that did not pass the local price check.