How do I track S-1 filings in real time?

The most reliable free method is SEC EDGAR's RSS feed for S-1 filings: https://www.sec.gov/cgi-bin/browse-edgar?action=getcurrent&type=S-1&dateb=&owner=include&count=40&output=atom. Subscribe this RSS feed to a reader like Feedly to get instant alerts. You can also use EDGAR's full-text search at efts.sec.gov to search for specific company names.

What is an S-1 filing?

An S-1 is a registration statement filed with the U.S. Securities and Exchange Commission (SEC) by a company seeking to list its shares on a public stock exchange. It discloses the company's business, financials, risk factors, and proposed offering price. The S-1 is typically filed 3–6 months before an IPO.

What is a confidential S-1 filing?

Under the JOBS Act, companies with under $1B revenue can submit a draft S-1 confidentially to the SEC before announcing an IPO. This 'confidential submission' or 'DRS' (Draft Registration Statement) is not public. Once the company decides to proceed, it files the public S-1 (which must be released at least 15 days before the IPO roadshow). Confidential filings are sometimes revealed by company announcements or SEC EDGAR amendments.

What's the difference between an S-1 and S-1/A?

An S-1 is the initial registration statement. An S-1/A (amendment) is a revised version filed after the initial submission, typically to update financials, address SEC comments, or revise pricing. Multiple S-1/A filings before an IPO are normal. The final S-1/A usually contains the confirmed IPO price range.

Which tech companies filed S-1s in 2026?

As of April 2026, notable tech S-1 filings tracked by TechStackIPO include: Cerebras Systems (AI chips, $23.1B valuation), X-Energy (nuclear energy tech, S-1 filed March 20, 2026, ticker XE), and SpaceX's confidential S-1 (April 2026, $1.75T valuation). Monitor TechStackIPO's real-time IPO signals feed for updates.

How-To Guide

How to Track S-1 Filings in Real Time

Last updated: April 22, 2026 · Methods verified: SEC EDGAR, Google Alerts, RSS

TL;DR — 30-Second Answer

Track S-1 filings via: 1) SEC EDGAR RSS feed (free, real-time): sec.gov/cgi-bin/browse-edgar?type=S-1&output=atom · 2) Google Alerts for company names · 3) EDGAR full-text search at efts.sec.gov · 4) TechStackIPO's Real-Time Stack for curated AI/tech company monitoring.

4 Ways to Track S-1 Filings

Method 1

SEC EDGAR RSS

Official SEC feed. Every S-1 filed with the SEC appears here within minutes. Subscribe in any RSS reader.

Free Real-time

Method 2

EDGAR Full-Text Search

Search S-1s by company name, keyword, or sector using EDGAR's full-text search engine.

Free

Method 3

Google Alerts

Set alerts for "[Company] S-1 filing" to catch news coverage of new filings as it breaks.

Free

Method 4

Real-Time Stack

TechStackIPO's curated S-1 monitoring for 367 tracked pre-IPO tech companies. Get alerts when watched companies file.

Curated

Step-by-Step Instructions

Subscribe to the SEC EDGAR S-1 RSS Feed

The SEC publishes a real-time Atom/RSS feed of all S-1 registration statement filings. Copy the URL below into an RSS reader (Feedly, Inoreader, or NetNewsWire). New S-1s appear within minutes of filing.

https://www.sec.gov/cgi-bin/browse-edgar?action=getcurrent&type=S-1&dateb=&owner=include&count=40&search_text=&output=atom

Use EDGAR Full-Text Search for Specific Companies

EDGAR's EFTS search engine lets you search the full text of all filings. Go to efts.sec.gov and search by company name. You can filter by filing type (S-1, S-1/A), date range, and more.

https://efts.sec.gov/LATEST/search-index?q="SpaceX"&forms=S-1,S-1/A

Set Google Alerts for Watched Companies

Create a Google Alert at google.com/alerts. Use search terms like "Stripe" "S-1" OR "IPO filing" and set frequency to "As it happens." This catches news coverage of S-1 announcements before EDGAR is indexed by search engines.

Monitor TechStackIPO's Real-Time Stack

TechStackIPO's IPO Signals feed monitors SEC EDGAR daily for all 367 tracked companies, plus maintains IPO Readiness Scores that change as new signals emerge. Get email alerts when a watched company files an S-1, amends a filing, or announces an IPO timeline.

Understanding S-1 Filing Types

When monitoring EDGAR, you'll encounter several related filing types:

S-1 — Initial registration statement. First public signal a company is pursuing an IPO.
S-1/A — Amendment to the S-1. Usually updates financials, addresses SEC review comments, or revises the price range. Multiple amendments are normal.
DRS — Draft Registration Statement (confidential submission under JOBS Act). Not public until the company elects to proceed. Sometimes revealed by company announcements.
424B4 — Final prospectus. Filed after pricing. Confirms IPO price, shares offered, and use of proceeds.
8-K — Current report. Filed when a major event occurs, including IPO-related announcements.

2026 Notable S-1 Filings to Watch

As of April 2026, TechStackIPO is monitoring S-1 signals for these high-priority companies:

Cerebras Systems — S-1 filed April 2026. AI chip maker, $23.1B valuation. View profile →
X-Energy — S-1 filed March 20, 2026 (ticker: XE). Nuclear energy technology. View profile →
SpaceX — Confidential S-1 filed April 2026. $1.75T valuation. Full analysis →
Anthropic — No S-1 filed yet; targeting October 2026. $380B valuation. View profile →
OpenAI — No S-1 filed yet; targeting Q4 2026. $852B valuation. View profile →

Real-Time Stack

Get Instant S-1 Alerts for 367 Tracked Companies

TechStackIPO's Real-Time Stack monitors SEC EDGAR daily for every tracked company. Get email alerts when a watched company files an S-1, amends a registration, or announces an IPO date. Never miss a filing.

Subscribe to Real-Time Stack → View IPO Pipeline

Frequently Asked Questions

Go to SEC EDGAR current filings, set "Filing Type" to S-1, and click "Get Filings." For a specific company, search by company name or CIK number. For real-time monitoring, use the RSS/Atom feed URL.

The S-1 is the full registration statement — a comprehensive document covering business, financials, risk factors, and management. The prospectus is a shorter, investor-facing summary derived from the S-1, used during the IPO roadshow. The final prospectus (424B4) is filed after pricing and is the legal offering document.

Typically 3 to 6 months from initial S-1 filing to IPO, though it varies. SEC review takes 30 days minimum. After receiving and responding to SEC comments, the company amends the S-1 (S-1/A), then schedules a roadshow. The roadshow typically runs 1–2 weeks before pricing. Confidential (DRS) filings add an additional pre-filing period of 3–12 months.

Yes. Three free options: (1) SEC EDGAR RSS feed subscribed to an RSS reader; (2) Google Alerts for "[company name] S-1 filing"; (3) EDGAR email alerts via the company's EDGAR filings page ("Subscribe to EDGAR feeds" button). TechStackIPO's Real-Time Stack provides curated, AI/tech-focused alerts with context.

As of April 2026, the most anticipated upcoming S-1 filings based on TechStackIPO's signal monitoring are: Anthropic (targeting Oct 2026), OpenAI (targeting Q4 2026), Databricks (2026 target), and Stripe (2026–2027 window). SpaceX and Cerebras have already filed.

Sources & Citations

SEC EDGAR S-1 filing system: sec.gov/cgi-bin/browse-edgar
EDGAR Full-Text Search System (EFTS): efts.sec.gov
JOBS Act — Confidential submission provisions, 2012. sec.gov
TechStackIPO IPO Pipeline — current S-1 filings tracked. techstackipo.com/pipeline