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Respiratory and sleep therapy

The 9 companies in this industry listed on the NYSE and Nasdaq are worth $37 bn combined; the largest are ResMed (RMD), Inspire Medical Systems (INSP) and Inogen Inc (INGN). For each one: what it does, revenue, margin, free cash flow over the last five years and a score from 0 to 10.

Data as of October 2026

Clear leader
9 companies value 37 bn revenue 7.1 bn margin 19.9% free cash flow 1.6 bn avg. score 2.2
RMD holds 93.0% of the group's value, 17.1x the runner-up
Rank Ticker Company Share Value Revenue Margin FCF 5 years FCF/px Yield What it does · why it is here
1 RMD ResMed
United States · score 7.2
93% 35 bn 5.7 bn 26.9% 1.6 bn 4.8% 1.0% CPAP devices and digital health for sleep apnea · Global leader in sleep apnea devices (CPAP)
2 INSP Inspire Medical Systems
United States · score 6.0
6% 2.0 bn 0.9 bn 15.0% 0.1 bn 5.8% — Implant for obstructive sleep apnea · Implant that treats sleep apnea without a mask; a growing alternative
3 INGN Inogen Inc
United States · score 0.4
1% 0.2 bn 0.3 bn -6.9% 0.0 bn -2.9% — Respiratory health medical technology · Massachusetts — revenue of $354m
4 ELMD Electromed, Inc.
United States · score 5.4
1% 0.2 bn 0.1 bn 15.3% 0.0 bn 3.7% — Airway clearance devices · Minnesota — revenue of $74m
5 LUNG Pulmonx Corp
United States · score 0.0
0% 0.1 bn 0.1 bn -55.0% -0.0 bn -40.8% — Minimally invasive medical technology for severe emphysema · California — revenue of $87m
6 NYXH Nyxoah SA
Belgium · score 0.0
0% 0.1 bn 0.0 bn -443.2% -0.1 bn -86.1% — Implant for obstructive sleep apnea, from Belgium · Belgium — revenue of $24m
7 XAIR Beyond Air, Inc.
United States · score 0.0
0% 0.0 bn 0.0 bn -435.7% -0.0 bn -979.9% — Nitric oxide generators and delivery systems · New York — revenue of $8m
8 VVOS Vivos Therapeutics, Inc.
United States · score 0.0
— — 0.0 bn -121.8% -0.0 bn — — Oral appliances for obstructive sleep apnea · Colorado — revenue of $21m
9 QTEX QTREX Quantum Ltd.
Israel · score 0.5
— — 0.0 bn -847.9% -0.0 bn — — Respiratory medical technology, from Israel · Israel — revenue of $2m

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What this is. A catalogue, not a guide. Every industry with stocks listed on the NYSE or NASDAQ, the companies contending for its leadership, what each one does according to its own annual report, and the balance sheet it filed with the SEC.

The score runs from 0 to 10 and compares each company with every other one in the almanac on cash generation, profitability, debt, dividends and consistency over the last five years. The higher it is, the better the company fares in that comparison. Curious how much each part weighs? Ask at the bottom of the page.

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