Inspire Medical Systems, Inc. (INSP) stock
Close on Nov 12, 2026Market cap $1.75BP/E 17.6Yield –
Inspire Medical Systems, Inc. saw revenue fall 0.2% to $880.94M over the twelve months to Sep 30, 2026. Operating income fell 57.1% to $15.76M, moving the operating margin from 4.2% to 1.8%. Free cash flow was $97.89M, down 0.9% from a year earlier. At the latest close the market valued the company at $1.75B, 17.6 times its earnings.
Key statistics
Valuation at the latest close; fundamentals over the trailing twelve months, balances at Sep 30, 2026
Valuation
- Market cap
- $1.75B
- P/E ratio
- 17.6
- Price to sales
- 1.99
- Price to book
- 2.12
- Dividend yield
- –
- Free cash flow yield
- 5.59%
Fundamentals
- Revenue
- $880.94M
- Net income
- $100.72M
- EPS, diluted
- $3.44
- Free cash flow
- $97.89M
- Book value per share
- $28.59
- Diluted shares
- 29M
Trading
- Next earnings
- Jan 11, 2027 (estimated, after the close)
- Previous close
- $62.11
- Open
- $62.00
- Day's range
- $60.39 – $62.53
- Volume
- 542,461
- Average volume (20 days)
- 699,525
- Index membership
- S&P SmallCap 600 (since Nov 2024), Russell 2000 (since Jun 2026), Russell 3000
- Beta (5 years)
- 1.08
- 52-week range
- $38.91 – $147.03
- RSI (14 days)
- 34.9
- Volatility (1 year)
- 70.0%
- Relative volume
- 0.69×
- WACC
- 10.3%
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Index membership is inferred from the holdings of funds that track each index (SPSM, IJR, IWM, IWV), as reported to the SEC for Jun 30, 2026. Join dates come from quarterly fund reports since 2019, so they are accurate to the quarter.
Market cap history
Month-end market cap since 2018, using shares outstanding reported at the time
Total return vs. the S&P 500
Price change plus reinvested dividends, to the close on Nov 12, 2026. The S&P 500 is measured by the SPY fund.
| Period | INSP | S&P 500 | Difference | INSP per year | S&P 500 per year |
|---|---|---|---|---|---|
| 1 month | -15.3% | -2.7% | −12.6 pts | ||
| 3 months | +3.9% | -1.7% | +5.6 pts | ||
| Year to date | -34.4% | +11.9% | −46.3 pts | ||
| 1 year | -33.4% | +12.0% | −45.4 pts | ||
| 3 years | -51.8% | +78.2% | −130.0 pts | -21.6% | +21.2% |
| 5 years | -78.3% | +73.2% | −151.5 pts | -26.3% | +11.6% |
Ten years at a glance
Fiscal years 2016 to 2025 and trailing twelve months, USD
Revenue
Gross profit
Operating income
Net income
EPS, diluted
Free cash flow
Press releases
Releases Inspire Medical Systems filed with the SEC as exhibits to Form 8-K or 6-K
- Results
- Results
- Results
- Results
- Results
- Results
About Inspire Medical Systems
Surgical & Medical Instruments & Apparatus
The company develops and commercializes minimally invasive neurostimulation technologies for patients with obstructive sleep apnea. Its main product is the Inspire system, including the Inspire IV and Inspire V models, which monitors breathing and delivers mild hypoglossal nerve stimulation to keep airways open during sleep. The system includes an implantable neurostimulator, leads, a remote control, and the digital SleepSync management platform. The company sells its medical devices to hospitals and ambulatory surgery centers, while collaborating with ear, nose, and throat doctors, sleep centers, and patients.
Company profile, executives and historyInspire Medical Systems stock: common questions
What is Inspire Medical Systems's stock price?
INSP closed at $60.54 on Nov 12, 2026, down 2.53% on the day. Over the past 52 weeks it traded between $38.91 and $147.03.
What is Inspire Medical Systems's market cap?
Inspire Medical Systems was worth $1.75B at the close on Nov 12, 2026: the share price times the diluted shares outstanding.
What is INSP's P/E ratio?
INSP trades at 17.6 times earnings, based on diluted earnings per share of $3.44 over the twelve months to Sep 30, 2026.
How much revenue does Inspire Medical Systems make?
Inspire Medical Systems reported revenue of $880.94M for the twelve months to Sep 30, 2026, down 0.2% from a year earlier.
Does Inspire Medical Systems pay a dividend?
No. Inspire Medical Systems has not paid a cash dividend over the last twelve months.
When does Inspire Medical Systems report earnings next?
Inspire Medical Systems is expected to report Q4 FY2026 results on Jan 11, 2027, after the close. The date is estimated from its past reporting pattern until the company confirms it.
How has INSP stock performed over the past year?
Including dividends, INSP returned -33.4% over the past year, against +12.0% for the S&P 500.
How many INSP shares are sold short?
4M shares were sold short at the latest FINRA report, 14.57% of the float, or 6.6 days of average trading volume.
Who are Inspire Medical Systems's competitors?
Companies most similar to Inspire Medical Systems by business, industry and size include IRTC, TNDM, NVCR, IART, ATRC.
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