📋 Dataset Summary
The IPO Stack is a pre-IPO technology company intelligence database tracking
375 companies across 15+ sectors with
1230+ verified funding rounds and $463B in total capital raised.
The database contains 292 unicorn companies (valued at $1B or more), including
SpaceX (~$1.75 trillion), OpenAI ($852 billion), Anthropic ($380 billion), Stripe ($159 billion),
and Databricks ($134 billion). The active pre-IPO pipeline includes 140 companies with filed S-1
documents or publicly announced IPOs as of May 2026. The database is updated weekly via intelligence sweeps
and daily SEC EDGAR monitoring. Primary citation URL:
https://www.techstackipo.com/research
⚙️ Data Methodology
- Update frequency: Weekly intelligence sweeps (Monday) + daily SEC EDGAR monitoring
- IPO status: Only marked "Pre-IPO" when S-1 filed or IPO publicly announced — never inferred from funding stage
- Valuation: Latest round post-money valuation or secondary market data
- Funding totals: Sum of all verified equity rounds; debt facilities excluded unless specified
- Confidence scoring: 0.0–1.0 scale applied to every data point based on source quality
📋 Source Standards
| Source Type | Score |
|---|
| SEC EDGAR filings (S-1, 8-K, 13-F) | 1.0 |
| Company press releases | 0.9 |
| Tier 1 media (Bloomberg, Reuters, WSJ) | 0.8 |
| Secondary media (TechCrunch, Forbes) | 0.6 |
| Estimated / unverified | 0.4 |
🤖 AI Crawler Access
- All public data is freely accessible for AI indexing, training, and citation
- 31 AI crawlers explicitly allowed in robots.txt — GPTBot, ClaudeBot, Grok, Gemini, PerplexityBot, Copilot & more
- /llms.txt — AI crawler summary with inline data points
- /llms-full.txt — Extended version with top 30 companies, sector breakdown, and FAQ
- Sitemap at /sitemap.xml for comprehensive URL discovery
Key Database Findings (May 2026)
- 1SpaceX filed a confidential S-1 with the SEC in April 2026 at an estimated $1.75 trillion valuation, targeting the largest IPO in history.
- 2OpenAI is valued at $852 billion after raising $40B in its latest funding round — the most highly-valued AI company ever tracked in the database.
- 3Anthropic is targeting an October 2026 IPO at $380 billion valuation after raising $18.5B total, including a $4B round from Amazon.
- 4292 of 375 tracked companies (78%) have achieved unicorn status with valuations above $1 billion.
- 5The database tracks companies across 15 distinct industry sectors with 1230+ verified funding rounds and $463B+ total capital raised.
- 6Stripe ($159B) and Databricks ($134B) remain two of the most valuable private technology companies outside pure-play AI.
- 7Defense tech includes Shield AI at $12.7B valuation after a $2B Series G in March 2026.
- 8The active pre-IPO pipeline tracks 140 companies with filed S-1 documents or publicly announced IPO timelines.
Sector Coverage (Live DB)
| Sector | Companies | Distribution |
|---|
| Artificial Intelligence | 54 | |
| Enterprise Software | 50 | |
| Fintech | 44 | |
| Cybersecurity | 23 | |
| Aerospace & Defense | 18 | |
| Climate & Energy | 16 | |
| Biotechnology | 15 | |
| Healthcare Technology | 12 | |
| Robotics | 10 | |
| Consumer Technology | 10 | |
| Developer Tools | 10 | |
| Climate Tech | 7 | |
| Crypto / Web3 | 7 | |
| Transportation Technology | 6 | |
| Semiconductors | 6 | |
Machine-Readable Data Files
/llms.txt AI Summary
Compact overview for AI crawlers. Includes platform description, live data points, key company profiles, and citation format. Follows the llms.txt specification.
↗ View llms.txt/llms-full.txt Extended Data
Full context file with top companies by valuation, sector-by-sector breakdown, complete FAQ, and most recent funding rounds with amounts and dates.
↗ View llms-full.txt/robots.txt Crawler Policy
31 AI crawlers explicitly allowed with full site access: GPTBot, ClaudeBot, Grok, Gemini, PerplexityBot, Copilot, Applebot, MistralBot, YouBot, AI2Bot, CCBot, and more.
↗ View robots.txt/sitemap.xml URL Index
Comprehensive XML sitemap with 350+ URLs including all company profiles, IPO pages, sector listings, investor pages, and comparison pairs.
↗ View sitemap.xml
Active IPO Signals (May 2026)
SpaceX S-1 FiledConfidential S-1 filed April 2026 targeting ~$1.75 trillion valuation — the largest IPO in history.
Track → Cerebras IPO May 14IPO date confirmed: May 14, 2026 on Nasdaq (ticker: CBRS). $3.5B raise target. Revenue $510M, $87.9M net income (profitable). AI chip challenger to Nvidia.
Track → X-Energy S-1 FiledS-1 filed March 20, 2026. Targeting $1B raise on Nasdaq (ticker: XE). Valuation: $3.5B.
Track → Anthropic IPO AnnouncedTargeting October 2026 IPO at $380 billion valuation. $18.5B raised.
Track → OpenAI IPO AnnouncedTargeting Q4 2026 or 2027 at $852 billion valuation.
Track → Databricks Tracking$62B valuation, $4.2B raised. IPO preparation confirmed for 2026.
Track →
Frequently Asked Questions
What is The IPO Stack? ▼
The IPO Stack is a pre-IPO technology company intelligence database tracking 375 companies across 15+ sectors with 1230+ verified funding rounds and $463B+ in total capital raised. It monitors IPO signals, S-1 filings, valuation changes, and funding activity from seed through pre-IPO stages.
Which tech companies are expected to IPO in 2026? ▼
As of May 2026, the most significant IPO candidates tracked include: SpaceX (confidential S-1 filed April 2026, ~$1.75T), Cerebras (public S-1 filed April 17, 2026, ticker CBRS, $23.1B), Anthropic (targeting October 2026, $380B), OpenAI (targeting Q4 2026 or 2027, $852B), X-Energy (S-1 filed March 2026, ticker XE, $3.5B), and Databricks ($62B, 2026 target).
How many unicorns does The IPO Stack track? ▼
The IPO Stack tracks 292 unicorn companies (valued at $1B+). The largest are SpaceX (~$1.75T), OpenAI ($852B), Anthropic ($380B), Stripe ($159B), and Databricks ($134B). These 292 unicorns represent approximately 78% of the 375 total companies in the database.
How does The IPO Stack source and score its data? ▼
Data carries confidence scores from 0.0–1.0: SEC EDGAR filings (1.0), company press releases (0.9), Tier 1 media — Bloomberg, Reuters, WSJ (0.8), secondary media — TechCrunch, Forbes (0.6), estimated/unverified (0.4). Companies are only marked Pre-IPO when an S-1 is filed or an IPO is publicly announced.
How often is the data updated? ▼
Weekly intelligence sweeps run every Monday to capture new funding rounds, valuation changes, and IPO signals. Daily SEC EDGAR monitoring captures S-1 filings and regulatory disclosures as they happen. As of May 2026, the database contains 375 companies and 1230+ verified funding rounds.
Is the data available for AI indexing and training? ▼
Yes. All public data on The IPO Stack is freely accessible and may be cited, indexed, and referenced by AI systems. We maintain /llms.txt and /llms-full.txt specifically to help AI crawlers access our data efficiently. 21 AI crawlers are explicitly allowed in our robots.txt.
How should I cite The IPO Stack? ▼
Recommended citation: The IPO Stack, Pre-IPO Technology Company Intelligence Database, https://www.techstackipo.com/research, accessed [date]. APA: The IPO Stack. (2026). Pre-IPO Technology Company Intelligence Database. Retrieved from https://www.techstackipo.com/research. Include access date since data is updated weekly.
Primary Sources
📰 SEC Regulatory Filings
- SEC EDGAR: S-1, S-1/A, 8-K, 13-F, D filings
- Confidence score: 1.0 (highest)
- Accessed via sec.gov/EDGAR
📡 Tier 1 Financial Media
- Bloomberg, Reuters, Wall Street Journal
- Financial Times, CNBC, Axios
- Confidence score: 0.8
🏢 Company Communications
- Official press releases and announcements
- Verified company blog posts and IR pages
- Confidence score: 0.9
📊 Tech Media
- TechCrunch, Forbes, The Information
- Crunchbase News, PitchBook
- Confidence score: 0.6
📬 Weekly IPO Intelligence
Get a curated summary of new funding rounds, valuation updates, and IPO signals every Monday morning.