IDT · Idt Corp · Options Chain

$70.51 +1.09 (+1.57%) At close · Sep 11

Russell 2000 member Rebalance outlook locked

Customer concentration — top 5 customers 8.9% of revenue

5 customers — 8.9% of revenue (fiscal 2025)

“While they may vary from quarter to quarter, our five largest customers collectively accounted for 8.9%, 10.3%, and 10.8% of our consolidated revenues in fiscal 2025, fiscal 2024, and fiscal 2023, respectively.”

5 customers — 10.3% of revenue (fiscal 2024)

“While they may vary from quarter to quarter, our five largest customers collectively accounted for 8.9%, 10.3%, and 10.8% of our consolidated revenues in fiscal 2025, fiscal 2024, and fiscal 2023, respectively.”

5 customers — 10.8% of revenue (fiscal 2023)

“While they may vary from quarter to quarter, our five largest customers collectively accounted for 8.9%, 10.3%, and 10.8% of our consolidated revenues in fiscal 2025, fiscal 2024, and fiscal 2023, respectively.”

5 customers — 20.4% of receivables (July 31, 2025)

“Our customers with the five largest receivables balance collectively accounted for 20.4% and 22.7% of our consolidated gross trade accounts receivable at July 31, 2025 and 2024, respectively.”

5 customers — 22.7% of receivables (July 31, 2024)

“Our customers with the five largest receivables balance collectively accounted for 20.4% and 22.7% of our consolidated gross trade accounts receivable at July 31, 2025 and 2024, respectively.”

View the 10-K filed Sep 29, 2025

Market Cap

$1.75B

24.87M

Options Chain

Underlying $70.51 · at close Sep 11, 2026 Options Calculator

Pull option chains with greeks and open interest through the options chain API or MCP →

Positioning

Sep 18, 2026 · 5 days to expiry · 44 contracts · mixed daily-bar sessions · Mar 16, 2026–Sep 11, 2026; 28 unknown

Put / call OI

0.42

Call-heavy positioning

Open interest

188

as of Sep 10, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$55.00

$15.51 below spot

ATM implied vol

48.7%

market's expected move

Open interest by strike

Calls Puts

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 5d Oct 16 33d Dec 18 96d Mar 19 187d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$43.60	$46.90	—		—	$0.00	$0.25	—	—	—	—
Call · $25 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.371 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $25 Daily-bar session Unknown Quote as of 2026-09-11 13:31:15.054 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$39.00	$41.90	—		—	$0.00	$2.15	—	—	—	—
Call · $30 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:56.867 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $30 Daily-bar session Unknown Quote as of 2026-09-11 19:59:24.484 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$33.60	$37.10	—		—	$0.00	$2.15	—	—	—	1
Call · $35 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $35 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.371 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$29.30	$32.00	—		$1.50	$0.00	$2.15	—	—	1	4
Call · $40 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:57.146 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $40 Daily-bar session Mar 16, 2026 Quote as of 2026-09-11 19:59:59.372 UTC Last $1.50 Breakeven $38.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$26.60	$30.10	—		—	$0.00	$2.15	—	—	—	2
Call · $42 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.373 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $42 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$25.60	$29.00	—		$1.30	$0.00	$2.15	—	—	1	1
Call · $43 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $43 Daily-bar session May 20, 2026 Quote as of 2026-09-11 19:59:59.371 UTC Last $1.30 Breakeven $41.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$24.60	$28.00	—		—	$0.00	$2.15	—	—	—	—
Call · $44 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.371 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $44 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$24.10	$27.10	—		—	$0.00	$2.15	—	—	—	1
Call · $45 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:57.146 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $45 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$22.60	$26.00	—		$1.75	$0.00	$2.15	—	—	1	2
Call · $46 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.373 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $46 Daily-bar session May 20, 2026 Quote as of 2026-09-11 19:59:59.372 UTC Last $1.75 Breakeven $44.25 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
2	2	—	—	$21.60	$25.10	$5.70		$2.00	$0.00	$2.15	—	—	1	1
Call · $47 In the money Daily-bar session Mar 17, 2026 Quote as of 2026-09-11 19:59:59.372 UTC Last $5.70 Breakeven $52.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $47 Daily-bar session May 20, 2026 Quote as of 2026-09-11 19:59:59.371 UTC Last $2.00 Breakeven $45.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
2	2	—	—	$20.80	$23.90	$5.20		$0.56	$0.00	$2.15	—	—	1	2
Call · $48 In the money Daily-bar session Mar 23, 2026 Quote as of 2026-09-11 19:59:24.561 UTC Last $5.20 Breakeven $53.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $48 Daily-bar session Jul 7, 2026 Quote as of 2026-09-11 19:59:59.371 UTC Last $0.56 Breakeven $47.44 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$19.60	$23.20	—		—	$0.00	$2.15	—	—	—	—
Call · $49 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:26.564 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $49 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.372 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
3	1	—	—	$18.60	$22.20	$13.32		$1.90	$0.00	$1.40	—	—	1	5
Call · $50 In the money Daily-bar session Jul 17, 2026 Quote as of 2026-09-11 19:59:59.372 UTC Last $13.32 Breakeven $63.32 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 OI effective date Sep 10, 2026 Model this call Put · $50 Daily-bar session Jun 5, 2026 Quote as of 2026-09-11 19:59:24.562 UTC Last $1.90 Breakeven $48.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 10, 2026 Model this put
91	1	—	—	$13.80	$17.20	$7.58		—	$0.00	$2.15	—	—	—	—
Call · $55 In the money Daily-bar session Jul 8, 2026 Quote as of 2026-09-11 19:59:49.574 UTC Last $7.58 Breakeven $62.58 Implied vol — Delta — Gamma — Theta — Vega — Open interest 91 OI effective date Sep 10, 2026 Model this call Put · $55 Daily-bar session Unknown Quote as of 2026-09-11 19:59:24.484 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
17	1	—	—	$8.70	$11.90	$7.92		$0.05	$0.00	$0.05	—	—	2	36
Call · $60 In the money Daily-bar session Aug 21, 2026 Quote as of 2026-09-11 19:59:59.372 UTC Last $7.92 Breakeven $67.92 Implied vol — Delta — Gamma — Theta — Vega — Open interest 17 OI effective date Sep 10, 2026 Model this call Put · $60 Daily-bar session Sep 1, 2026 Quote as of 2026-09-11 14:13:31.208 UTC Last $0.05 Breakeven $59.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 36 OI effective date Sep 10, 2026 Model this put
11	14	—	—	$3.80	$6.80	$5.30		$1.58	$0.00	$2.20	—	—	1	1
Call · $65 In the money Daily-bar session Jul 29, 2026 Quote as of 2026-09-11 19:59:59.304 UTC Last $5.30 Breakeven $70.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 11 OI effective date Sep 10, 2026 Model this call Put · $65 Daily-bar session Aug 17, 2026 Quote as of 2026-09-11 19:59:24.484 UTC Last $1.58 Breakeven $63.42 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
2	1	—	—	$0.00	$2.85	$0.35		—	$0.00	$2.45	—	—	—	—
Call · $70 In the money Daily-bar session Jun 12, 2026 Quote as of 2026-09-11 19:59:59.268 UTC Last $0.35 Breakeven $70.35 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $70 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.276 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
Underlying $70.51
4	2	—	—	$0.00	$0.40	$0.35		—	$3.10	$6.40	-0.852	48.7%	—	—
Call · $75 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 19:59:41.178 UTC Last $0.35 Breakeven $75.35 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 OI effective date Sep 10, 2026 Model this call Put · $75 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.304 UTC Last — Breakeven — Implied vol 48.7% Delta -0.852 ≈85% ITM Gamma 0.058 Theta -0.086 Vega 0.019 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.15	—		—	$8.60	$11.40	-0.857	95.7%	—	—
Call · $80 Daily-bar session Unknown Quote as of 2026-09-11 14:00:51.378 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $80 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.322 UTC Last — Breakeven — Implied vol 95.7% Delta -0.857 ≈86% ITM Gamma 0.029 Theta -0.171 Vega 0.019 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.15	—		—	$13.10	$15.90	-0.977	78.1%	—	—
Call · $85 Daily-bar session Unknown Quote as of 2026-09-11 19:59:48.833 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $85 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:57.147 UTC Last — Breakeven — Implied vol 78.1% Delta -0.977 ≈98% ITM Gamma 0.009 Theta -0.027 Vega 0.005 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.15	—		—	$17.80	$21.40	—	—	—	—
Call · $90 Daily-bar session Unknown Quote as of 2026-09-11 19:59:49.586 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $90 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:50.609 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.95	—		—	$22.90	$26.40	—	—	—	—
Call · $95 Daily-bar session Unknown Quote as of 2026-09-11 19:59:59.297 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $95 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:58:08.501 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Mar 16, 2026–Sep 11, 2026; 28 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1005731 CUSIP 448947507 13F (30d) 63 filings 63 filers Visit website