Mario Schlosser

Co-founder & President of Technology @OscarHealth; former Bridgewater, McKinsey, Eigentrust, Vostu, Stanford CS visiting scholar, U Hannover.

[Mario Schlosser @mariots]

Oscar Q1 numbers are proof that it really is possible to build a profitable healthcare business ever more beloved by members: 3.2M members, $4.6B revenue, $704M earnings from operations in Q1 '26.

But could YOU have done it?
Now you can test yourself... 1/2

[Oscar Health @OscarHealth]

Here are a few highlights from Oscar Health's latest earnings call, as reported this morning.

👉 Total Revenue: Increased to approximately $4.6B, up 53% year-over-year

👉 Earnings from Operations: $704M, up ~2.5X year-over-year

We also saw solid member growth. As of March 31st, we served ~3.2 million members, an increase of 56% over the same time last year.

Check out highlights from the quarter.

[Mario Schlosser @mariots]

@pejmannozad @FIFAWorldCup That is awesome. Are you going to any games in Metlife? Surely the final if Iran makes it?

[Mario Schlosser @mariots]

@RaminNasibov Zak McKracken @DavidBFox

[Mario Schlosser @mariots]

@inspector_token @Andercot Wasn't he one of like hundreds of German dukes, kings, counts, whatever long after monarchs had any real power?

[Mario Schlosser @mariots]

Crazy ChatGPT use case is that we never really knew where exactly my grandfather fought in WW II, only that he was put on a train, shipped east, turned around (later realized he narrowly avoided the Kessel in Stalingrad), then stormed up a mountain in France. ChatGPT figured out that the Reserve-Gebirgs-Regiment 1, part of the 157th Division, was stationed in Aix-les-Bains, France, in 1943 and then fought in Gap in the French Alps, which matches timeline, story and pictures. (Both of my grandfathers never really wanted to talk about where they fought in the war, most Wehrmacht soldiers destroyed any mementos they had after the war during denazification, and most archives were destroyed in the bombings of 1944-45)

[Retro Gamer @RetroGamer_de]

HERE! WE! GOOOOOOOOOOOOOOOO!!!!!

Das Crowdfunding für unser großes 80er-Test-Sonderheft ist gestartet!

Macht mit und helft uns dieses üppige Sonderheft zu realisieren! 🤩💪

https://t.co/NB90XApb0O

[Mario Schlosser @mariots]

@ItsAndyRyan The Gambia (i know it's a country but still)

[Mario Schlosser @mariots]

@gerardtbaker And avoid the headbutting

[Mario Schlosser @mariots]

@RetroGamer_de Das neue Heft lag gestern in meiner Post in New York, super!

[Mario Schlosser @mariots]

These unlicensed American world cup magazines ("A Fan Guide to World Soccer 2026", carefully avoiding FIFA wrath) are hilarious and probably AI-generated with the occasional hallucination: if Klose had scored 16 goals in the 2006 world cup, we would probably have won

[Mario Schlosser @mariots]

@benmoores2 Spinalonga in Greece is also cool: old Venetian fortress that was turned into a leper colony. It really looks this way, and the whole island is fortified

[Mario Schlosser @mariots]

Amazing list! Three more:
- Burg Eltz is one of the oldest and best-preserved German castles (used to have a youth hostel in it, don't know if it's still there)
- The fort in Bukhara, Uzbekistan (Ark of Bukhara) is amazing (albeit more beautiful from the outside than the inside)
- Point Alpha is on the old West-East German border and the location where the Soviet tanks would have come through for an invasion of Western Europe (crossing the mythical Fulda Gap). Pre-1989, when you stood on the West German side of the fence for longer than 30 seconds, the East German soldiers on the watch towers (every 150 meters or so) would all train their binoculars on you, and eventually the West German Bundesgrenzschutz would walk up and politely ask you to stop looking like you're going to invade

[Oscar Health @OscarHealth]

Oscar Health is proud to debut at #412 on @TIME's World’s Most Impactful Companies list.

The list recognizes companies that work to address high-priority global challenges as part of their core business.

Oscar has been on a mission to make a healthier life accessible and affordable for all. We have spent over a decade challenging the status quo, using our full-stack technology platform, innovative plan designs, and investment in funding mechanisms like Individual Coverage Health Reimbursement Arrangements (ICHRA) to reorient healthcare around the individual.

Our work is important because cost, accessibility, and experience are still major barriers to care for millions of Americans. As healthcare becomes more expensive and complex, we are solving for all three to create a system that puts consumers in control of their healthcare.

We’re grateful to TIME for recognizing our work, and proud of the team whose dedication has brought us here.

Check out the full list: https://t.co/Ujq3sTp5G1

[Mario Schlosser @mariots]

Oscar alumni crushing it!

[Forus @forushq]

Today we’re introducing Forus and announcing $160M to build the foundation for modern medicine.

Science should be the only limit to medicine. Today it isn’t. Drug discovery is moving faster, but the system that turns it into real-world treatment isn’t.

https://t.co/kideEzsDjO

[Mario Schlosser @mariots]

Here is an AI agent playing it

[Mario Schlosser @mariots]

Oscar Q1 numbers are proof that it really is possible to build a profitable healthcare business ever more beloved by members: 3.2M members, $4.6B revenue, $704M earnings from operations in Q1 '26.

But could YOU have done it?
Now you can test yourself... 1/2

[Oscar Health @OscarHealth]

Here are a few highlights from Oscar Health's latest earnings call, as reported this morning.

👉 Total Revenue: Increased to approximately $4.6B, up 53% year-over-year

👉 Earnings from Operations: $704M, up ~2.5X year-over-year

We also saw solid member growth. As of March 31st, we served ~3.2 million members, an increase of 56% over the same time last year.

Check out highlights from the quarter.

[Mario Schlosser @mariots]

(2/2) ...because when I interview engineering leaders, we pair-vibe-code games that simulate Oscar. My canonical version - sourced from actual Oscar strategy documents - is here:

https://t.co/EbOgomTc5u

(It's running on a game engine I created that represents all games in pure text, so LLMs and agents can play them just as well. If you want your @OpenAI Codex or Claude Code to play it, point it here: https://t.co/3lZRAKSKuf)

Also funny that when I had the LLM play it, it knew enough about to me to realize it's playing as myself (and knew our actual hospital strategy from 2014).

Most traditional health insurers don't know how to operate in a competitive individual market. Oscar does. Do you?

[Mario Schlosser @mariots]

@florianederer That's also been the case for a while. In most world cups since 2006, it's been way more fun in cities and fan zones than in stadiums themselves, for that reason

[Mario Schlosser @mariots]

@werdelin @audos_com Super interesting. Maybe the founder of the first billion-dollar startup run by one person ends up being a robot, not a human

[Mario Schlosser @mariots]

@pmarca Have you tried a mirror