IRTC · iRhythm Holdings, Inc. · Options Chain

Track IRTC — free

$111.43 -1.45 (-1.28%) At close · Sep 11

Russell 2000 member Rebalance outlook locked

Market Cap

$3.67B

32.96M

Options Chain

Underlying $111.43 · 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 · 46 contracts · mixed daily-bar sessions · Jul 17, 2026–Sep 11, 2026; 26 unknown

Put / call OI

1.56

Put-heavy positioning

Open interest

1,150

as of Sep 10, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$115.00

$3.57 above spot

ATM implied vol

49.7%

market's expected move

Open interest by strike

Calls Puts

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 5d Oct 16 33d Nov 20 68d Dec 18 96d Jan 15 124d Feb 19 159d Mar 19 187d Dec 17 460d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$49.60	$53.50	—		—	$0.00	$2.15	—	—	—	—
Call · $60 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.460 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $60 Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.187 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$44.50	$48.50	—		—	$0.00	$2.15	—	—	—	—
Call · $65 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.461 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $65 Daily-bar session Unknown Quote as of 2026-09-11 19:54:38.791 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$39.60	$42.70	—		—	$0.00	$0.50	—	—	—	—
Call · $70 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.476 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $70 Daily-bar session Unknown Quote as of 2026-09-11 13:30:34.774 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$34.50	$38.50	—		$0.74	$0.00	$2.15	—	—	30	30
Call · $75 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:57.103 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $75 Daily-bar session Aug 17, 2026 Quote as of 2026-09-11 19:59:59.765 UTC Last $0.74 Breakeven $74.26 Implied vol — Delta — Gamma — Theta — Vega — Open interest 30 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$29.50	$32.80	—		$0.60	$0.00	$1.15	—	—	1	1
Call · $80 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:00.052 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $80 Daily-bar session Aug 24, 2026 Quote as of 2026-09-11 19:58:51.811 UTC Last $0.60 Breakeven $79.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$24.50	$28.50	—		$0.68	$0.00	$1.15	—	—	1	1
Call · $85 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.461 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $85 Daily-bar session Aug 24, 2026 Quote as of 2026-09-11 19:58:51.811 UTC Last $0.68 Breakeven $84.32 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	75.9%	0.993	$19.50	$23.50	—		$0.45	$0.00	$1.35	—	—	1	1
Call · $90 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:21.215 UTC Last — Breakeven — Implied vol 75.9% Delta 0.993 ≈99% ITM Gamma 0.002 Theta -0.029 Vega 0.003 Open interest — OI effective date — Model this call Put · $90 Daily-bar session Aug 17, 2026 Quote as of 2026-09-11 19:58:51.811 UTC Last $0.45 Breakeven $89.55 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	79.9%	0.961	$14.70	$18.60	—		—	$0.00	$1.55	—	—	—	—
Call · $95 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:58:01.770 UTC Last — Breakeven — Implied vol 79.9% Delta 0.961 ≈96% ITM Gamma 0.008 Theta -0.098 Vega 0.011 Open interest — OI effective date — Model this call Put · $95 Daily-bar session Unknown Quote as of 2026-09-11 19:58:51.811 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	61.6%	0.939	$10.00	$13.40	—		$0.82	$0.00	$1.15	—	—	18	18
Call · $100 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.481 UTC Last — Breakeven — Implied vol 61.6% Delta 0.939 ≈94% ITM Gamma 0.015 Theta -0.107 Vega 0.016 Open interest — OI effective date — Model this call Put · $100 Daily-bar session Aug 27, 2026 Quote as of 2026-09-11 19:58:59.119 UTC Last $0.82 Breakeven $99.18 Implied vol — Delta — Gamma — Theta — Vega — Open interest 18 OI effective date Sep 10, 2026 Model this put
9	9	70.4%	0.779	$6.20	$9.20	$12.60		$0.71	$0.10	$2.50	-0.227	72.6%	5	119
Call · $105 In the money Daily-bar session Jul 17, 2026 Quote as of 2026-09-11 19:58:01.770 UTC Last $12.60 Breakeven $117.60 Implied vol 70.4% Delta 0.779 ≈78% ITM Gamma 0.032 Theta -0.281 Vega 0.039 Open interest 9 OI effective date Sep 10, 2026 Model this call Put · $105 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 19:58:51.811 UTC Last $0.71 Breakeven $104.29 Implied vol 72.6% Delta -0.227 ≈23% ITM Gamma 0.032 Theta -0.283 Vega 0.039 Open interest 119 OI effective date Sep 10, 2026 Model this put
—	—	52.1%	0.599	$2.00	$5.00	—		$1.75	$0.75	$2.80	-0.394	47.4%	1	200
Call · $110 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:58:51.811 UTC Last — Breakeven — Implied vol 52.1% Delta 0.599 ≈60% ITM Gamma 0.057 Theta -0.269 Vega 0.05 Open interest — OI effective date — Model this call Put · $110 Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 19:59:15.561 UTC Last $1.75 Breakeven $108.25 Implied vol 47.4% Delta -0.394 ≈39% ITM Gamma 0.062 Theta -0.233 Vega 0.05 Open interest 200 OI effective date Sep 10, 2026 Model this put
Underlying $111.43
9	1	47.8%	0.299	$0.40	$1.90	$1.90		$4.20	$4.00	$6.20	-0.666	57.3%	92	320
Call · $115 Daily-bar session Sep 11, 2026 Quote as of 2026-09-11 19:57:57.103 UTC Last $1.90 Breakeven $116.90 Implied vol 47.8% Delta 0.299 ≈30% ITM Gamma 0.056 Theta -0.22 Vega 0.045 Open interest 9 OI effective date Sep 10, 2026 Model this call Put · $115 In the money Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 19:57:57.361 UTC Last $4.20 Breakeven $110.80 Implied vol 57.3% Delta -0.666 ≈67% ITM Gamma 0.049 Theta -0.264 Vega 0.048 Open interest 320 OI effective date Sep 10, 2026 Model this put
1	1	—	—	$0.00	$1.25	$6.60		$3.09	$6.90	$10.30	-0.953	37%	1	10
Call · $120 Daily-bar session Sep 1, 2026 Quote as of 2026-09-11 19:59:39.883 UTC Last $6.60 Breakeven $126.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $120 In the money Daily-bar session Sep 4, 2026 Quote as of 2026-09-11 19:58:04.907 UTC Last $3.09 Breakeven $116.91 Implied vol 37% Delta -0.953 ≈95% ITM Gamma 0.02 Theta -0.035 Vega 0.013 Open interest 10 OI effective date Sep 10, 2026 Model this put
14	6	100%	0.179	$0.05	$2.35	$0.32		—	$11.60	$15.30	—	—	—	—
Call · $125 Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 19:57:59.756 UTC Last $0.32 Breakeven $125.32 Implied vol 100% Delta 0.179 ≈18% ITM Gamma 0.02 Theta -0.343 Vega 0.034 Open interest 14 OI effective date Sep 10, 2026 Model this call Put · $125 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:57.104 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
250	5	—	—	$0.00	$1.00	$1.65		—	$17.30	$20.50	-0.921	89.5%	—	—
Call · $130 Daily-bar session Sep 2, 2026 Quote as of 2026-09-11 19:10:33.940 UTC Last $1.65 Breakeven $131.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 250 OI effective date Sep 10, 2026 Model this call Put · $130 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:51.178 UTC Last — Breakeven — Implied vol 89.5% Delta -0.921 ≈92% ITM Gamma 0.013 Theta -0.159 Vega 0.019 Open interest — OI effective date — Model this put
65	48	—	—	$0.00	$0.75	$0.20		—	$21.60	$25.50	-0.985	73.9%	—	—
Call · $135 Daily-bar session Sep 10, 2026 Quote as of 2026-09-11 19:58:51.811 UTC Last $0.20 Breakeven $135.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 65 OI effective date Sep 10, 2026 Model this call Put · $135 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:57.104 UTC Last — Breakeven — Implied vol 73.9% Delta -0.985 ≈98% ITM Gamma 0.004 Theta -0.023 Vega 0.005 Open interest — OI effective date — Model this put
91	15	—	—	$0.00	$1.95	$1.20		—	$26.60	$30.60	—	—	—	—
Call · $140 Daily-bar session Aug 24, 2026 Quote as of 2026-09-11 19:55:15.187 UTC Last $1.20 Breakeven $141.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 91 OI effective date Sep 10, 2026 Model this call Put · $140 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:00.055 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	—	—	—	$0.00	$1.95	—		—	$31.60	$35.50	—	—	—	—
Call · $145 Daily-bar session Unknown Quote as of 2026-09-11 19:58:51.811 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $145 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.460 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
5	5	—	—	$0.00	$2.15	$1.72		—	$37.30	$40.60	—	—	—	—
Call · $150 Daily-bar session Jul 17, 2026 Quote as of 2026-09-11 19:59:59.764 UTC Last $1.72 Breakeven $151.72 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 10, 2026 Model this call Put · $150 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:00.052 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$0.15	$0.75		—	$42.40	$45.60	—	—	—	—
Call · $155 Daily-bar session Jul 20, 2026 Quote as of 2026-09-11 13:30:01.494 UTC Last $0.75 Breakeven $155.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $155 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:00.063 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
2	1	—	—	$0.00	$2.80	$0.10		—	$47.40	$50.60	—	—	—	—
Call · $160 Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 13:30:03.455 UTC Last $0.10 Breakeven $160.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $160 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:00.063 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$0.10	—		—	$52.40	$55.50	—	—	—	—
Call · $165 Daily-bar session Unknown Quote as of 2026-09-11 13:59:45.825 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $165 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:55:15.460 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
2	4	—	—	$0.00	$4.20	$0.01		—	$56.60	$60.20	—	—	—	—
Call · $170 Daily-bar session Aug 10, 2026 Quote as of 2026-09-11 13:30:01.774 UTC Last $0.01 Breakeven $170.01 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $170 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:57.524 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 · Jul 17, 2026–Sep 11, 2026; 26 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 1388658 CUSIP 450056106 13F (30d) 96 filings 95 filers Visit website Investor relations