Alpaca, a brokerage and financial-infrastructure startup, has raised $435 million as it expands a business that lets investors trade across markets using AI agents and explores a move into prime brokerage.
July 16, 2026 · Alpaca
Alpaca Raises $435M to Bet on AI-Agent Trading
The brokerage-infrastructure startup lands fresh capital to scale APIs that let investors trade markets through autonomous AI agents — and weighs a move into prime brokerage.
$435M
Total raised: $135M equity + $300M debt
$1.15B
Valuation set at January 2026 Series D
10M+
Brokerage accounts across 40+ countries
API Usage Surge
Q1 2026 API activity grew ~4× from the prior quarter
1×
Prior quarter (Q4 '25)
Monthly growth climbed from single digits in Q4 2025 to about 30% in early 2026.
How Agent Trading Flows
AI Chat / Coding Tool
Claude, ChatGPT, Cursor, VS Code
→
MCP Server
Plain-language commands
→
Trading API
Stocks · Crypto · ETFs · Options
Full visibility into prompts, parameters and orders — with paper trading on a simulated $100,000 balance before any switch to live.
One 30-Day Paper-Trading Test
Higher return — but a steep drawdown
The Bet
Agent-driven volume keeps rising; Alpaca becomes the infrastructure layer for developers, retail experimenters and — potentially — prime-broking clients.
The Caveats
Reliability, drawdown risk and oversight of autonomous systems remain unresolved. Tools are for education only — real capital is not recommended.
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