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Oura files to go public on the Nasdaq under OURA. Up to $3 billion raised at a reported $16 billion valuation. Revenue of $1.4 billion, up 74%, and up three years running. Gross margin of 55%, down from 65% in 2024. Income from operations of $71 million, a 6% margin. Net income of $61 million - and a net loss attributable to common of $924 million.

It is not a fitness tracker, and it would like you to stop saying so. It is a Finnish sensor company, redomiciled to San Francisco this year, that sells a $311 ring which pays back acquisition on day one, then bills $70 a year at 89% margin. 72% of members are women.

The fine print: an $84 million battery warranty, Samsung asking the ITC to block imports, and a former CEO suing over his buyout. The ask is 11x sales. Whoop, the closest comp, last raised at $10 billion.

A company redomiciled from Finland to San Francisco this year, then filed to go public at a reported $16 billion valuation.

Oura is a smart ring. Five million people wear one a median of 23 hours a day, which turns a piece of titanium jewelry into one of the largest continuous health datasets in existence. The company would very much like you to call it a preventative health platform. It uses the word "preventative" 18 times in the filing.

Here is what it actually is. Revenue of $1.4 billion, up 74%, and genuinely profitable at $61 million of net income. Start with the mix. Hardware is 80% of revenue at roughly 46% margin, and it pays back the cost of acquiring you on the day you buy the ring. Then the subscription kicks in. $70 a year, 89% gross margin, 85% retention at twelve months. The ring is the acquisition channel. The subscription is the business.

Net income was $61 million, but the loss attributable to common shareholders was $924 million. Oura spent $1.2 billion buying stock back from its own investors right before asking the public to buy in.

Three Finnish engineers in Oulu looked at the fitness tracker market in 2013 and noticed everyone was measuring the wrong thing. Every device counted steps while people were awake. Nobody tracked the eight hours they spent asleep.

Petteri Lahtela, Kari Kivelä, and Markku Koskela came out of Oulu's post-Nokia talent pool, the thousands of engineers who scattered when the phone business collapsed. They picked the finger because arteries there sit closer to the surface than veins at the wrist, which gives a cleaner pulse signal. Kivelä, a cousin of Lahtela, designed jewelry at Nokia. That combination of medical sensing and jewelry turned out to be the whole company.

They launched on Kickstarter in 2015 and raised over $650,000, six times the goal. The first ring shipped in 2016. For the next six years Oura was purely a hardware company. The subscription that now earns 89% margins did not exist until October 2021.

Then two things happened that changed the trajectory. COVID made a device that detects fever suddenly essential. And in 2022 the founders handed the company to Tom Hale, a SurveyMonkey executive with no ring in the story.

Every S-1 has a risk factors section written by lawyers to cover everything. Here are the ones that actually matter.

The growth does not last. Revenue grew 123% in fiscal 2025 and 74% in the nine months after. Oura says plainly not to expect that to continue. This is a company that sold more rings in nine months than in all of last year, and it is telling you the curve bends down from here.

The profit is thin and new. Net income was $60.8 million on $1.2 billion of revenue. That is a 5% margin, achieved for the first time, and Oura warns costs rise from here as a public company.

Everything rides on one product. Around 80% of revenue is the ring, and the membership only exists because you bought the ring. One weak generation hits both lines at once. The Ring 4 battery defect already showed how that works.

They make nothing themselves. No factories, single source suppliers, and tariff exposure across Estonia, Finland, Mexico, South Korea, China, and the Netherlands. The ring is mostly titanium, which sits directly in the metals tariff line.

Every S-1 picks a number, and the number is always big. Oura picked $90 billion.

It gets there by stacking five markets on top of each other. Fitness trackers, health and wellness coaching, digital care management, digital therapeutics, and connected biosensors. Add them up and you have a serviceable market big enough to justify almost any valuation.

The reason for the stacking is simple. Oura does not want to be priced as a fitness tracker. Garmin and Whoop live in that bucket, and that bucket trades at seven times revenue. So the filing says "preventative" 18 times and "proactive" 24 times. The pitch is a health platform that happens to ship a ring.

The more convincing case is who actually buys it. 72% of members are women, and female membership is compounding faster than male. Cycle tracking, conception, pregnancy, perimenopause, and menopause give Oura a sequence of reasons to keep someone for decades. 37% of members earn under $100,000. A third had never worn a wearable before.

That last number is the real opportunity. Oura is not fighting for the wrist. It is selling to people who never wanted a smartwatch.

The ring is not the product. The finger is the product.

I had assumed the smart ring was a shrunk-down smartwatch, the same sensors in a smaller shell. It's the reverse. Oura picked the finger first, then built hardware around it, because the finger is a physiologically better place to read a body. Digital arteries sit close to the surface, the skin is thin, and the whole thing barely moves while you sleep. Oura says that gives a pulse signal up to 100 times stronger than the wrist.

Which means you cannot think of this as jewelry with a chip in it. Members wear the ring a median of 23 hours a day, so it is closer to a continuous medical sensor that happens to look like a wedding band. Five million people feeding it heart rate, HRV, temperature, sleep, and movement.

Then it splits into two businesses off that one signal. The ring is 80% of revenue at roughly 46% margin, sold once. The membership reads the same data forever at 89% margin, $70 a year.

The hardware is the price of admission. The signal is what they actually sell, and they sell it monthly.

The ring is the loss leader in this company. The subscription is where the money actually compounds.

I assumed the opposite going in. Sell a $349 ring at a fat hardware margin, treat the $6 a month as a nice add-on. It runs the other way.

The ring earns about 46 cents on the dollar, which is strong for a physical object, better than Apple. But that margin comes once, at purchase. The subscription earns 89 cents on the dollar, $70 a year, and it comes back every year the ring stays on a finger. 85% of members are still paying twelve months later.

So the hardware is not the business. It is customer acquisition that happens to pay for itself on day one. Oura recovers the cost of finding you the moment you check out, then bills you at software margins for as long as you keep wearing it.

The model has one dependency. No ring, no subscription. 94% of ring buyers convert to paid, so the whole engine runs on selling the next generation of hardware to keep feeding the recurring line underneath it.

Thomas Hale, - Chief Executive Officer

Hale is a software operator, not a health guy or a founder. He took the job in March 2022, well into the ring's life. Before Oura the track runs Adobe, then Linden Lab, then HomeAway, then president of SurveyMonkey, which he took public in 2018. The résumé is subscription software and IPOs. Which fits, because Oura is really a subscription business that ships hardware. He came to it as a customer first, credits the ring with fixing his sleep during a rough stretch, then called the leadership and talked his way in. Harvard BA.

Sean Brecker, - Chief Financial Officer

Brecker has run this playbook in wellness before. Nearly a decade at Headspace as both CEO and CFO, where he architected the $3 billion merger with Ginger. Before that, a trader at J.P. Morgan, Lehman, and Citi across New York, London, and Singapore. He arrived October 2023. Wharton MBA in financial engineering.

Oura raised roughly $1.6 billion across its life, which is modest for a company this size. The valuation went up in steps. A $200 million Series D in December 2024 at $5.2 billion, led by Fidelity with Dexcom alongside. Then $900 million in October 2025 at $11 billion, Fidelity again, joined by ICONIQ, Whale Rock, and Atreides. The +5% holders now are Fidelity, Forerunner, Bedford Ridge, and Lifeline Ventures out of Helsinki.

In the nine months before filing, Oura spent about $1.2 billion buying its own stock back from existing holders. It ran a $534 million tender in February at $40.18 a share, then another $437 million at prices as high as $56.25.

Why sell right before an IPO? Look at the entry price. Forerunner led the Series B at roughly $0.77 a share. In February they sold at $40.18, about 52 times their cost, and stayed above the 5% line. Take the chips, keep the upside.

Oura built a private liquidity event and a public one back to back, and the private one came first.

Oura is not fighting for the ring market. Oura is the ring market.

It holds roughly 74% of global smart ring shipments. The next names are far behind. Ultrahuman around 9%, Samsung around 9%, RingConn around 5%. When one company ships more than eight of every ten rings sold, there is no top three. There is a leader and a rounding error.

But the threats do not come from the ranking. They come from two directions the ranking hides.

Below Oura sits the subscription-free crowd. Ultrahuman and RingConn charge for the ring and nothing after. Ultrahuman grew revenue more than fivefold to about $64 million on one-fifteenth of Oura's funding, and it stayed profitable. That is the model that quietly erodes the 89% margin line Oura is asking investors to pay for.

Above Oura sits Samsung, which does not need rings to work. It can lose money on the Galaxy Ring for a decade to feed its ecosystem, exactly the "free subscription" threat the S-1 names.

The real comps are not other rings. They are Whoop, which stayed private at $10 billion, and Peloton, which showed what happens when hardware growth stops.

Oura did $1.21 billion in revenue for the nine months, up 74%. But hardware is 80% of that at roughly 46% margin, so a big share of the top line is the cost of a titanium ring, not profit. Gross profit was $662 million, and that is the number the business actually runs on.

Below it, the spending tells the real story. Sales and marketing ran $258 million, 21 cents of every revenue dollar, up 84% to push Ring 5. R&D nearly doubled to $207 million. G&A jumped 132%, much of it IP litigation and getting public-company ready. That left $71 million of operating income, a 6% margin.

Then the tax line does something strange. The prior year Oura paid a 96% effective rate because it set up a valuation allowance in a low-income period. This year the rate dropped to 13%, which is most of why net income leapt from near zero to $61 million.

Oura's positioning underscores its potential to redefine wearable health from a step-counting accessory into a recurring-revenue platform spanning sleep, recovery, women's health, and preventative care. With a model that recovers acquisition cost on day one, it has differentiated from screen-based smartwatches and subscription-free rivals while compounding across 5 million paid members and 85% retention.

Bull Case: Oura holds roughly 74% of global smart ring shipments, earns 89% margins on membership, and converts 94% of ring buyers into subscribers. 72% of members are women, opening a decades-long sequence of use cases. Price the recurring layer, not the hardware, and 11x sales is defensible.

Bear Case: 80% of revenue is still a titanium ring that breaks, as the $84 million battery warranty proved. Samsung can give hardware away, Ultrahuman is growing fivefold on a fraction of the capital, and Oura just spent $1.2 billion cashing out insiders before asking the public in.

Vincent Jong is the founder of DataMerge, a B2B data platform challenging ZoomInfo and Apollo with smarter enrichment waterfalls and transparent pricing and Meetbot which is an AI‑first scheduling platform. He also builds AI-first companies through Poolside Ventures and hosts SaaS on the Beach, an exclusive retreat for top SaaS founders.

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