VC Funding Top Ten — August 4, 2026: AI Mega-Rounds, Brazil's Record Seed, Attovia IPO

Overview

Tuesday, August fourth, three PM Pacific. Today's biggest check goes to OLIX, a UK-based AI chip startup, which just locked in a massive $312 million Series B at a $3.3 billion post-money valuation. It's a day defined by big bets on artificial intelligence, with seven of the top ten rounds going to AI-native companies.

In this show

• Tuesday, August fourth, three PM Pacific. Today's biggest check goes to OLIX, a UK-based AI chip startup, which just locked in a massive $312 million Series B at a $3.3 billion post-money valuation. It's a day defined by big bets on artificial intelligence, with seven of the top ten rounds going to AI-native companies. We'll break down all the term sheets and what they signal for the market. I'm your host, and with me are our Markets and World analysts. Let's get into the numbers.
• Here's the snapshot for today. The venture capital landscape saw at least $913.15 million in disclosed funding across ten key rounds. The hottest category was overwhelmingly AI, accounting for seven of those deals. The story of the day is the continued wave of large, AI-focused funding rounds, signaling very strong investor confidence in the sector. On the public market side, the notable event was Attovia Therapeutics, which priced its upsized IPO, raising $289 million.
• Let's dive into that number one deal. OLIX, the UK semiconductor startup, raised $312 million in a Series B, reaching a $3.3 billion valuation. The company is building specialized chips for each stage of the AI token production process. This funding is critical because it's earmarked to accelerate delivery of their DX-1 decode accelerator chip. That chip is specifically designed for the next generation of AI models—those with 10 trillion or more parameters—with a target delivery in the second half of 2027.
• Next up, HappyRobot locked in a $150 million Series C, becoming a new unicorn with a $1.2 billion valuation. Led by Prysm Capital and Eurazeo, the company provides an AI agent platform to automate complex enterprise operations. They've seen explosive 5x growth since their last round in late 2025, initially focusing on the logistics industry. Now, they're using this new capital to expand into other complex sectors like insurance, energy, and telecommunications, proving out the horizontal applicability of their agent platform.
• At number three, embodied-AI startup PaXini raised a strategic round of approximately $138 million. The funding came from an unnamed global electronics group and several funds. PaXini develops and ships tactile-sensing chips for robotics, giving machines a sense of touch. This round brings their cumulative fundraising to about $483 million. The capital is aimed at R&D and expanding capacity, which is crucial as they've already shipped nearly one million units in the past year alone, signaling strong market adoption.
• Cybersecurity for AI is a growing concern, and investors are taking note. Obsidian Security raised an $85 million Series D at a $1.1 billion valuation, led by Crescent Cove Advisors. Their platform is designed to monitor and govern the AI agents that companies are now deploying across third-party apps like Microsoft Copilot and Salesforce Agentforce. The funding is timely, as enterprises are granting these agents more access to sensitive data, and recent security breaches from AI models at major labs have highlighted the urgent need for specialized security.
• In a major signal for Latin American tech, Brazil-based Decade secured an $85 million seed round. This is the largest seed funding round ever for a Latin American startup. The AI-native wealth advisory company was founded by the former CTO of Nubank, lending it significant credibility. The round was led by a trio of top firms: Greenoaks, Benchmark, and Diffusion. The sheer size of this seed investment indicates powerful investor confidence in the region's fintech sector and the founding team's vision to scale high-level financial intelligence.
• Developer tools continue to attract significant capital. Convex, a backend application platform, raised a $57 million Series B led by Insight Partners. The company's platform helps developers build full-stack, real-time applications without getting bogged down in managing complex infrastructure. This is becoming increasingly important as more software is written by AI agents, which require robust and simplified backend services. With millions of its instances now in production, this funding from a major growth investor signals strong market traction and product-market fit.
• At number seven, we have another AI deal. Antioch, a simulation platform for robotics, raised a $31.4 million Series A. The company enables robotics teams to build, test, and deploy their autonomous systems entirely within a software environment before moving to expensive hardware. This 'sim-to-real' approach is crucial for accelerating development and reducing costs in the robotics industry. The new funding brings Antioch's total reported equity raised to $44 million, showing steady progress in a capital-intensive field.
• Moving down the list, agricultural fintech platform Ambrook raised a $30 million Series B. With backers including Lachy Groom and Thomson the outlet Ventures, Ambrook provides accounting and financial management tools specifically for farmers and rural businesses. This round brings their total funding to $59 million and highlights continued investor interest in modernizing the financial infrastructure of the massive agriculture industry, a sector historically underserved by technology.
• Rounding out the top ten are two notable rounds. First, healthtech platform Assured raised a $19 million Series A led by Insight Partners. Their software automates clinician credentialing, helping doctors join insurer networks 30% faster. And in the space sector, EndeavorSpace emerged from stealth with a $10.75 million seed round from General Catalyst and Andreessen Horowitz. They're developing a satellite-based backhaul network to compete with subsea fiber optic cables, a bold play on future internet infrastructure.
• And one thing to watch later this week. The lock-up period for SpaceX shares from its IPO expires this Thursday, August 6th. Approximately 911.5 million shares will become eligible for sale, which represents about 140% of the current public float. While many insiders may hold, the sheer volume of newly tradable supply could introduce significant price volatility. The stock has fallen about 43% from its post-IPO peak, so this will be a key event for investors. That's our show. We'll be back tomorrow afternoon at three PM Pacific with the next deal flow.