Ostium

Ostium

Chicago, Illinois, USA
2 employees
Blockchain and Cryptocurrency
Series A · $27.8M

About Ostium

Ostium delivers a decentralized trading platform that enables leveraged trading of real-world assets, including stocks, commodities, indices, foreign exchange, and cryptocurrencies, directly on-chain. Users maintain self-custody of their funds; trades, liquidity, and fees are publicly visible on a blockchain, removing reliance on traditional brokers. The platform offers up to 200× leverage and supports both long and short positions across a wide range of asset classes. Ostium uses real-time, low-latency price feeds via oracle systems to provide accurate and timely pricing. In addition, it recently introduced a points program that rewards user trading activity, referrals, and liquidity provision by converting on-platform engagement into a points ledger to track participation.

Company details

Team Size2
LocationChicago, Illinois, USA
IndustryBlockchain and Cryptocurrency

Funding

Total raised

$27.8M

Last stage

Series A

Investors

General Catalyst
JJump Crypto
Coinbase Ventures
LocalGlobe
WWintermute

Founders

Kaledora Kiernan-Linn

Kaledora Kiernan-Linn

Harvard and Bridgewater alumni; former professional ballerina with the Royal Danish Ballet. Co-founded Ostium in 2022.

LinkedIn
Marco Antonio Ribeiro

Marco Antonio Ribeiro

Harvard and Bridgewater alumni; International Physics and Math Olympiad medalist. Co-founded Ostium in 2022.

LinkedIn

What happens next.

No applications, no recruiter spam. Just the intro.

01

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

02

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

03

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.