INSP · Inspire Medical Systems, Inc.

Track INSP — free

$57.10 -1.10 (-1.89%) At close · Aug 14

Market Cap

$1.65B

28.91M

Options Chain

Underlying $57.10 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 62 contracts · mixed snapshot sessions · Dec 19, 2025–Aug 14, 2026; 18 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 5d Sep 18 33d Nov 20 96d Dec 18 124d Jan 15 152d Feb 19 187d Mar 19 215d Dec 17 488d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	487.5%	0.967	—		$0.55	-0.027	450.8%	1	2
Call · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 487.5% Delta 0.967 ≈97% ITM Gamma 0.002 Theta -0.228 Vega 0.004 Open interest 0 Model this call Put · $22.5 Snapshot session Jul 2, 2026 Last $0.55 Breakeven $21.95 Implied vol 450.8% Delta -0.027 ≈3% ITM Gamma 0.002 Theta -0.174 Vega 0.004 Open interest 2 Model this put
0	—	428.6%	0.965	—		$0.05	-0.03	405.1%	10	10
Call · $25 In the money Snapshot session Unknown Last — Breakeven — Implied vol 428.6% Delta 0.965 ≈96% ITM Gamma 0.003 Theta -0.21 Vega 0.005 Open interest 0 Model this call Put · $25 Snapshot session Jul 31, 2026 Last $0.05 Breakeven $24.95 Implied vol 405.1% Delta -0.03 ≈3% ITM Gamma 0.002 Theta -0.172 Vega 0.005 Open interest 10 Model this put
1	1	337.9%	0.959	$14.00		$0.50	-0.038	326.8%	2	96
Call · $30 In the money Snapshot session May 26, 2026 Last $14.00 Breakeven $44.00 Implied vol 337.9% Delta 0.959 ≈96% ITM Gamma 0.004 Theta -0.19 Vega 0.005 Open interest 1 Model this call Put · $30 Snapshot session Jul 13, 2026 Last $0.50 Breakeven $29.50 Implied vol 326.8% Delta -0.038 ≈4% ITM Gamma 0.004 Theta -0.168 Vega 0.005 Open interest 96 Model this put
0	—	288.7%	0.937	—		$0.10	-0.06	283.1%	13	18
Call · $35 In the money Snapshot session Unknown Last — Breakeven — Implied vol 288.7% Delta 0.937 ≈94% ITM Gamma 0.006 Theta -0.226 Vega 0.01 Open interest 0 Model this call Put · $35 Snapshot session Aug 4, 2026 Last $0.10 Breakeven $34.90 Implied vol 283.1% Delta -0.06 ≈6% ITM Gamma 0.006 Theta -0.21 Vega 0.01 Open interest 18 Model this put
109	1	204.6%	0.935	$21.30		$0.10	-0.04	172.4%	1	124
Call · $40 In the money Snapshot session Aug 4, 2026 Last $21.30 Breakeven $61.30 Implied vol 204.6% Delta 0.935 ≈93% ITM Gamma 0.009 Theta -0.166 Vega 0.011 Open interest 109 Model this call Put · $40 Snapshot session Aug 5, 2026 Last $0.10 Breakeven $39.90 Implied vol 172.4% Delta -0.04 ≈4% ITM Gamma 0.007 Theta -0.093 Vega 0.006 Open interest 124 Model this put
39	2	148.7%	0.913	$12.80		$0.17	-0.059	128.7%	2	43
Call · $45 In the money Snapshot session Aug 12, 2026 Last $12.80 Breakeven $57.80 Implied vol 148.7% Delta 0.913 ≈91% ITM Gamma 0.015 Theta -0.151 Vega 0.011 Open interest 39 Model this call Put · $45 Snapshot session Aug 5, 2026 Last $0.17 Breakeven $44.83 Implied vol 128.7% Delta -0.059 ≈6% ITM Gamma 0.013 Theta -0.095 Vega 0.011 Open interest 43 Model this put
130	3	97.5%	0.873	$10.00		$0.10	-0.12	94.9%	1	230
Call · $50 In the money Snapshot session Aug 7, 2026 Last $10.00 Breakeven $60.00 Implied vol 97.5% Delta 0.873 ≈87% ITM Gamma 0.03 Theta -0.132 Vega 0.018 Open interest 130 Model this call Put · $50 Snapshot session Aug 12, 2026 Last $0.10 Breakeven $49.90 Implied vol 94.9% Delta -0.12 ≈12% ITM Gamma 0.03 Theta -0.119 Vega 0.018 Open interest 230 Model this put
93	1	70.1%	0.676	$3.35		$0.70	-0.264	47.7%	1	40
Call · $55 In the money Snapshot session Aug 13, 2026 Last $3.35 Breakeven $58.35 Implied vol 70.1% Delta 0.676 ≈68% ITM Gamma 0.073 Theta -0.162 Vega 0.024 Open interest 93 Model this call Put · $55 Snapshot session Aug 13, 2026 Last $0.70 Breakeven $54.30 Implied vol 47.7% Delta -0.264 ≈26% ITM Gamma 0.096 Theta -0.096 Vega 0.024 Open interest 40 Model this put
Underlying $57.10
159	3	63.3%	0.275	$0.71		$2.75	-0.91	30.4%	17	139
Call · $60 Snapshot session Aug 14, 2026 Last $0.71 Breakeven $60.71 Implied vol 63.3% Delta 0.275 ≈28% ITM Gamma 0.074 Theta -0.134 Vega 0.026 Open interest 159 Model this call Put · $60 In the money Snapshot session Aug 12, 2026 Last $2.75 Breakeven $57.25 Implied vol 30.4% Delta -0.91 ≈91% ITM Gamma 0.08 Theta -0.027 Vega 0.013 Open interest 139 Model this put
49	1	100.3%	0.164	$0.25		$4.20	—	—	5	21
Call · $65 Snapshot session Aug 12, 2026 Last $0.25 Breakeven $65.25 Implied vol 100.3% Delta 0.164 ≈16% ITM Gamma 0.035 Theta -0.156 Vega 0.02 Open interest 49 Model this call Put · $65 In the money Snapshot session Aug 4, 2026 Last $4.20 Breakeven $60.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 21 Model this put
135	1	126%	0.113	$0.70		$18.00	—	—	6	4
Call · $70 Snapshot session Aug 5, 2026 Last $0.70 Breakeven $70.70 Implied vol 126% Delta 0.113 ≈11% ITM Gamma 0.021 Theta -0.15 Vega 0.014 Open interest 135 Model this call Put · $70 In the money Snapshot session Aug 3, 2026 Last $18.00 Breakeven $52.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this put
135	4	152.5%	0.089	$0.70		$29.35	—	—	15	2
Call · $75 Snapshot session Jul 28, 2026 Last $0.70 Breakeven $75.70 Implied vol 152.5% Delta 0.089 ≈9% ITM Gamma 0.015 Theta -0.154 Vega 0.015 Open interest 135 Model this call Put · $75 In the money Snapshot session May 6, 2026 Last $29.35 Breakeven $45.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
49	5	178.4%	0.079	$0.05		$29.70	—	—	1	0
Call · $80 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $80.05 Implied vol 178.4% Delta 0.079 ≈8% ITM Gamma 0.012 Theta -0.165 Vega 0.009 Open interest 49 Model this call Put · $80 In the money Snapshot session Jul 15, 2026 Last $29.70 Breakeven $50.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
3	1	205.9%	0.078	$3.20		$42.30	—	—	10	1
Call · $85 Snapshot session Mar 23, 2026 Last $3.20 Breakeven $88.20 Implied vol 205.9% Delta 0.078 ≈8% ITM Gamma 0.01 Theta -0.187 Vega 0.009 Open interest 3 Model this call Put · $85 In the money Snapshot session May 15, 2026 Last $42.30 Breakeven $42.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
14	1	220.9%	0.066	$1.25		$20.40	—	—	3	2
Call · $90 Snapshot session May 5, 2026 Last $1.25 Breakeven $91.25 Implied vol 220.9% Delta 0.066 ≈7% ITM Gamma 0.008 Theta -0.176 Vega 0.009 Open interest 14 Model this call Put · $90 In the money Snapshot session Jan 29, 2026 Last $20.40 Breakeven $69.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
30	1	216.8%	0.039	$0.10		$15.30	—	—	1	0
Call · $95 Snapshot session Jun 30, 2026 Last $0.10 Breakeven $95.10 Implied vol 216.8% Delta 0.039 ≈4% ITM Gamma 0.005 Theta -0.114 Vega 0.005 Open interest 30 Model this call Put · $95 In the money Snapshot session Jan 7, 2026 Last $15.30 Breakeven $79.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	2	259%	0.059	$2.15		—	—	—	—	0
Call · $100 Snapshot session Feb 23, 2026 Last $2.15 Breakeven $102.15 Implied vol 259% Delta 0.059 ≈6% ITM Gamma 0.006 Theta -0.187 Vega 0.01 Open interest 4 Model this call Put · $100 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	281.7%	0.06	$9.60		$23.90	—	—	15	0
Call · $105 Snapshot session Feb 26, 2026 Last $9.60 Breakeven $114.60 Implied vol 281.7% Delta 0.06 ≈6% ITM Gamma 0.006 Theta -0.209 Vega 0.01 Open interest 1 Model this call Put · $105 In the money Snapshot session Dec 19, 2025 Last $23.90 Breakeven $81.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	293.6%	0.053	$4.00		—	—	—	—	0
Call · $110 Snapshot session Mar 3, 2026 Last $4.00 Breakeven $114.00 Implied vol 293.6% Delta 0.053 ≈5% ITM Gamma 0.005 Theta -0.198 Vega 0.01 Open interest 1 Model this call Put · $110 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	309.7%	0.051	$2.39		$43.40	—	—	1	0
Call · $115 Snapshot session Mar 5, 2026 Last $2.39 Breakeven $117.39 Implied vol 309.7% Delta 0.051 ≈5% ITM Gamma 0.005 Theta -0.203 Vega 0.01 Open interest 2 Model this call Put · $115 In the money Snapshot session Feb 26, 2026 Last $43.40 Breakeven $71.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	1	325.2%	0.05	$4.40		—	—	—	—	0
Call · $120 Snapshot session Feb 26, 2026 Last $4.40 Breakeven $124.40 Implied vol 325.2% Delta 0.05 ≈5% ITM Gamma 0.004 Theta -0.209 Vega 0.01 Open interest 4 Model this call Put · $120 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	339.5%	0.048	$5.50		—	—	—	—	0
Call · $125 Snapshot session Feb 26, 2026 Last $5.50 Breakeven $130.50 Implied vol 339.5% Delta 0.048 ≈5% ITM Gamma 0.004 Theta -0.213 Vega 0.005 Open interest 1 Model this call Put · $125 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	351.1%	0.047	—		$68.95	—	—	5	0
Call · $130 Snapshot session Unknown Last — Breakeven — Implied vol 351.1% Delta 0.047 ≈5% ITM Gamma 0.004 Theta -0.215 Vega 0.005 Open interest 0 Model this call Put · $130 In the money Snapshot session Mar 6, 2026 Last $68.95 Breakeven $61.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	362.3%	0.046	$4.20		—	—	—	—	0
Call · $135 Snapshot session Feb 26, 2026 Last $4.20 Breakeven $139.20 Implied vol 362.3% Delta 0.046 ≈5% ITM Gamma 0.004 Theta -0.216 Vega 0.006 Open interest 1 Model this call Put · $135 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	373.1%	0.045	$1.85		—	—	—	—	0
Call · $140 Snapshot session Mar 4, 2026 Last $1.85 Breakeven $141.85 Implied vol 373.1% Delta 0.045 ≈4% ITM Gamma 0.004 Theta -0.218 Vega 0.006 Open interest 1 Model this call Put · $140 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	383.5%	0.044	—		—	—	—	—	0
Call · $145 Snapshot session Unknown Last — Breakeven — Implied vol 383.5% Delta 0.044 ≈4% ITM Gamma 0.003 Theta -0.22 Vega 0.006 Open interest 0 Model this call Put · $145 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
5	1	393.6%	0.043	$2.50		—	—	—	—	0
Call · $150 Snapshot session Jan 29, 2026 Last $2.50 Breakeven $152.50 Implied vol 393.6% Delta 0.043 ≈4% ITM Gamma 0.003 Theta -0.221 Vega 0.006 Open interest 5 Model this call Put · $150 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	4	403.4%	0.042	$1.41		—	—	—	—	0
Call · $155 Snapshot session Feb 4, 2026 Last $1.41 Breakeven $156.41 Implied vol 403.4% Delta 0.042 ≈4% ITM Gamma 0.003 Theta -0.223 Vega 0.006 Open interest 4 Model this call Put · $155 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	2	412.9%	0.041	$1.35		—	—	—	—	0
Call · $160 Snapshot session Feb 26, 2026 Last $1.35 Breakeven $161.35 Implied vol 412.9% Delta 0.041 ≈4% ITM Gamma 0.003 Theta -0.225 Vega 0.006 Open interest 2 Model this call Put · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	422.1%	0.04	—		—	—	—	—	0
Call · $165 Snapshot session Unknown Last — Breakeven — Implied vol 422.1% Delta 0.04 ≈4% ITM Gamma 0.003 Theta -0.226 Vega 0.006 Open interest 0 Model this call Put · $165 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	2	431.1%	0.04	$2.69		—	—	—	—	0
Call · $170 Snapshot session Jan 22, 2026 Last $2.69 Breakeven $172.69 Implied vol 431.1% Delta 0.04 ≈4% ITM Gamma 0.003 Theta -0.228 Vega 0.006 Open interest 2 Model this call Put · $170 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Dec 19, 2025–Aug 14, 2026; 18 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 20 strikes around the money are shown by default — switch to "All 31" for the wings.

Key facts CIK 1609550 CUSIP 457730109 13F (30d) 269 filings 254 filers Visit website Investor relations