OpenYield, a New York-based API-first institutional bond marketplace, has raised $6.1 million in Series A funding led by LeveL Markets. The platform operates an SEC-registered ATS that aggregates algorithmic liquidity from market makers into an all-to-all venue with firm executable prices, no last-look privileges, and transparent order-book matching for corporate bonds, municipal bonds, and US Treasuries. The capital will support development of agentic trading workflows and tokenized bond trading.
Equity Venues Enter Fixed Income
The timing comes amid accelerating electronification of fixed income. LeveL Markets, an equities ATS backed by Nasdaq, BlackRock, Citi, and Bank of America, will integrate OpenYield's bond marketplace into its platform. This gives institutional clients direct access to bond liquidity through existing equity trading connections. Trumid raised approximately $722 million in total funding with a $2.4 billion valuation in 2021. Moment raised $134 million in its Series C in May 2026.
Legacy Infrastructure Limits Automation
The $150 trillion fixed-income market still operates on plumbing built before modern automation. Most technology powering bond trading was designed for a world where a human picked up the phone. Dealers now quote bonds in milliseconds, but venues investors trade on have not kept up. OpenYield serves 60+ financial institutions representing over $5 trillion in client assets and has executed nearly $2 billion in volume across 85,000+ tickets since its 2024 launch.
Firm Quotes and API-First Design
OpenYield eliminates last-look privileges, the practice where dealers can reject a trade after seeing the price. This is a structural difference from traditional bond venues. The platform offers 100% firm quotes, price-time priority matching, no minimum trade sizes, and FIX API connectivity that integrates into existing order management systems. CEO Jonathan Birnbaum previously ran fixed income execution at Bridgewater Associates and was COO of US credit trading at Morgan Stanley.
"Most of the technology that powers the bond market was designed for a world where a human picked up the phone. That world is gone."
Strategic Capital from Equities ATS
LeveL Markets leads the round with participation from Draper Associates, Canapi Ventures, and Clocktower Ventures. The investment is LeveL's first strategic move, signaling conviction that equity-style connectivity can extend into fixed income. OpenYield's data API products, which sell reference data, pricing, and analytics to non-trading clients, provide an additional revenue stream.
$128 Trillion Market Shifts Electronically
The global bond market stands at $128-143 trillion. Corporate bonds alone reached $45 trillion in 2026 and are projected to reach $102 trillion by 2034. J.P. Morgan forecasts electronic channels will account for 70% of total fixed income trading activity by 2026. OpenYield competes with MarketAxess, Tradeweb, Bloomberg, and Trumid by offering an API-native venue built for algorithmic liquidity providers rather than screen-based RFQ workflows.
Ex-Bridgewater CEO Builds for Agents
Founder and CEO Jonathan Birnbaum's background spans fixed income execution at Bridgewater Associates, Morgan Stanley credit trading, and SoFi Invest. Co-founder and CTO Hilton Lipschitz built trading systems for hedge funds managing billions in fixed-income assets. The team recently hired Michael Lazebnik, formerly of Tradeweb, as VP of Engineering.
Agentic Workflows and Tokenization Ahead
With deployments already live, OpenYield plans to expand through agentic trading workflows via an MCP server and tokenized bond protocols. The company is also hiring for engineering and go-to-market roles to scale its infrastructure.