Daily Funding Roundup:
May 18, 2026
Anthropic owns the SDK layer. Acquired Stainless for ~$300M+, removing shared infrastructure from OpenAI, Google, and Meta. Sigma doubled to $3B on $80M Series E. Dust took $40M from Sequoia for multiplayer agentic AI. Musk lost to Altman in under two hours. The 10-year yield broke 4.13%, the post-Powell tape's first real fingerprint. Nvidia earnings Wednesday.
Rounds
Sigma Computing raised $80M Series E at a $3B post-money valuation (doubled from $1.5B), led by Princeville Capital with new strategics Databricks Ventures, ServiceNow Ventures, and Workday Ventures. The full prior syndicate rolled. The agentic analytics platform crossed $200M ARR with 100%+ YoY growth and 2,000+ customers including AMD, Duolingo, and JPMorgan Chase. Co-founded 2014 by CTO Rob Woollen (ex-Salesforce) and Chief Architect Jason Frantz (ex-MapR); CEO Mike Palmer joined in 2020.
Paris-based multiplayer agentic AI platform Dust raised $40M Series B co-led by Sequoia Capital (returning) and Abstract Ventures, with new strategic checks from Snowflake Ventures and Datadog. The platform lets enterprises build and deploy AI agents collaboratively across shared workspaces, connecting to Slack, Notion, Google Drive, GitHub, and other internal systems. 3,000+ organizations and 300,000+ agents deployed (Clay, Profound, Persona, Doctolib). Co-founded 2022 by CEO Gabriel Hubert (ex-Stripe) and CTO Stanislas Polu (ex-Stripe, ex-OpenAI).
San Francisco AI-native CPQ company Roadrunner raised $22M Series A led by Founders Fund (Trae Stephens), with Kleiner Perkins following. Kleiner Perkins's first incubation since Glean, co-founded by KP partner Joubin Mirzadegan (still a partner at the firm) with Ajay Natarajan and Eugene Shao in 2025. Built around PQA (Prompt, Quote, Approve), the platform brings AI-native revenue infrastructure to enterprise pricing workflows. Total raised: $27M.
London AI-first employee experience super-app Blink raised $17M growth equity sole-led by Enlightened Hospitality Investments. Announced alongside a global partnership with Shake Shack. The mobile-first comms, workflow, and people processes platform for frontline workforces grew 159% in the US in FY2023 and 300% YoY in self-service adoption in 2025. Founded 2017 by CEO Sean Nolan (previously co-founded Tomorrow Communications).
Acquisitions
Anthropic acquired New York developer tools startup Stainless for a reported $300M-plus (roughly 2x Stainless's $150M December 2024 Series A mark). Stainless's SDK and MCP server generator powered the official Python/TypeScript/Go/Java/Kotlin/Ruby SDKs for OpenAI, Google, Meta, Anthropic, Cloudflare, and Runway. Anthropic will wind down all hosted Stainless products (existing customers retain rights to SDKs already generated). Strategically significant: Anthropic effectively now owns the toolchain that produces official SDKs for its largest rivals. Founded 2022 by CEO Alex Rattray (ex-Stripe API docs and SDK tooling) with roughly $28.5M raised pre-acquisition from Sequoia and Andreessen Horowitz.
News & Signals
Musk v. Altman/OpenAI: jury rejects suit in under two hours
A federal jury in Oakland (Judge Yvonne Gonzalez Rogers) took less than two hours to unanimously rule against Elon Musk's breach-of-charitable-trust suit against OpenAI and Sam Altman, finding it filed past the three-year statute of limitations. Case tossed. Musk called it a 'calendar technicality' on X and vowed to appeal. The verdict closes one of the longest-running governance disputes in AI and clears OpenAI's legal overhang ahead of its IPO calendar.
Markets pull back: 10Y at 52-week high above 4.13%, S&P -0.29%
The Nasdaq and S&P 500 sank to start the week as the 10-year Treasury yield hit a 52-week high above 4.13%; 20Y and 30Y at highs not seen since 2007 (~5.13%). S&P 500 closed down roughly 0.29% from Friday's record at 7,501. Bitcoin pressure continued, sliding amid the April PPI surge to 6%, with about $563M in crypto liquidations on the day. The post-Powell, pre-Warsh handover is showing up first in the bond market.
Dell Tech World 2026: OpenAI Codex on-prem via Dell AI Factory
Dell announced 1,000 new AI Factory with Nvidia customers last quarter (5,000 total, including Eli Lilly, Honeywell, and Samsung). OpenAI's Codex is coming to hybrid and on-prem enterprises via Dell AI Factory plus Dell AI Data Platform. The OpenAI-Dell partnership is a meaningful concession to enterprise customers who cannot run frontier coding agents in the public cloud, and a structural counter to Anthropic's enterprise momentum.
Nvidia earnings preview (Wed May 20 AMC)
Street looking for roughly $78.8B in revenue (+77-78% YoY) and $1.77 EPS. Data Center segment expected at ~$72.8B (up from $53.8B in June 2025). Options imply an 8-10% move on the print. Blackwell ramp is ahead of plan; Nvidia maintains roughly 81% AI accelerator share. The most important earnings of Q2 for the AI capex thesis after Cerebras's $5.55B IPO.
Apple/Google resist EU interoperability rules; Apple plots Siri privacy overhaul
The EU is proposing broader AI and digital platform interoperability requirements; both Apple and Google are pushing back hard through industry channels. Apple separately is preparing a major Siri update with automatic deletion of conversation history, addressing the lingering trust overhang from the late-2024 Apple Intelligence rollout problems. Both moves are pre-emptive against regulatory pressure expected to escalate through the summer.
VC Mood on X
The mood going into Monday was a tug-of-war between AI deal euphoria and rates-driven nerves. The Stainless acquisition dominated developer Twitter for a full afternoon: the consensus take from VCs was admiration for Anthropic's strategic depth (they bought the SDK layer for the entire AI ecosystem) alongside grumbling from OpenAI and Google engineers about losing a critical piece of plumbing. Dev-tools investors were doing victory laps; Sequoia and a16z each scored on the cap table. By late afternoon the conversation shifted to whether Anthropic's $900B-valuation round prices before May 26 with a half-billion-dollar stock-funded acquisition already on the books.
Underneath the AI noise, the macro tape kept VCs uneasy. The 10-year hitting a 52-week high above 4.13% on Powell's first Monday out and Warsh's first day in office spooked growth-stock chatter. Bitcoin slipping further from its $80K perch fed the soft risk-off tone. Crypto-native VCs were defensive; growth-equity folks were already debating whether Sigma's doubling to $3B at $200M ARR (15x) is the new ceiling or just a floor in an agentic-analytics arms race that now includes Databricks, ServiceNow, and Workday all writing checks.
The third strain was anticipation. Nvidia prints Wednesday, and almost every macro and VC account framed it as the most important earnings of Q2: a $78.8B consensus that needs to beat plus issue Blackwell-driven guidance to keep the data-center capex narrative intact. Add the Musk-loses-to-Altman verdict (cathartic for OpenAI fans, fodder for "Elon getting smaller" memes) and the day delivered both a deal-of-the-year contender and a courtroom blowout. Net: bullish on AI infrastructure, cautious on multiples, eyes glued to Nvidia.
Rounds and signals sourced from SEC filings, press releases, and verified news reports. All amounts in USD unless noted. Reporting reflects information available at time of publication.