SignalX
AI filing intelligence · US + Korea

The fastest way to read SEC filings.

SEC EDGAR (US) and DART (Korea, beta) — indexed the moment they're filed, summarized by AI, and cross-referenced with insider trades and fund holdings.

No credit card required · 5 free AI queries / month

187,024
Filings Indexed
2,815
Companies Tracked
3.1M
Holdings Positions
—
New Filings Today

Coverage

Every form that moves markets

United StatesSEC EDGAR
10-K
Annual Reports
10-Q
Quarterly Reports
8-K
Current Reports
13F
Fund Holdings
Form 4
Insider Trading
SC 13D/G
Activist Filings
KoreaDART
Beta
사업보고서
Annual Report
분기보고서
Quarterly Report
주요사항보고서
Material Events

Who is it for

From buy-side desks to retail portfolios

Buy-side analysts

Screen 2,800+ companies by financials, insider activity, and fund flows. Generate first-pass research notes from 10-Ks in minutes, not hours.

Open screeners

Portfolio managers

Watchlist your holdings, get notified on new 8-Ks and Form 4s, and monitor cross-fund signals when smart money rotates.

Browse companies

Retail investors

Read AI-summarized filings on the stocks you own. Skip the 200-page 10-Ks — get the bullets that matter, with citations to the source.

See AI summaries

Capabilities

Built for institutional-grade research

Everything you need to turn EDGAR's raw output into investment signal.

AI Summaries

Section-by-section bullet analysis of 10-Ks, 10-Qs, and 8-Ks. Risk Factors, MD&A, and Business — distilled in seconds, with citations to the source text.

XBRL Financials

Revenue, net income, EPS, and 100+ metrics extracted from SEC's structured XBRL data. No manual entry, no parsing — just numbers.

Insider Signals

Form 4 transactions in real time. Track who's buying, who's selling, and how it stacks up against historical patterns.

Fund Portfolios

13F-HR holdings across millions of positions. See what hedge funds are buying, dropping, and concentrating into.

AI Research

Ask questions in plain English. The AI cross-references filings, financials, insider trades, and fund holdings to answer.

Two Markets, One Platform

S&P 500, Nasdaq 100, Russell 2000 across SEC EDGAR — plus Korea's DART in beta. Unified search across both markets.

Workflow

From raw filing to actionable signal

01

Real-time ingestion

EDGAR is polled continuously. Filings are parsed, sectioned, and persisted within seconds of submission.

02

AI section analysis

Claude Sonnet generates 3–5 bullet summaries per section, grounded in the source text — no hallucination padding.

03

Cross-signal detection

Insider buys + 8-K events + 13F concentration → surfaced as composite signals on company dashboards.

FAQ

Frequently asked questions

What is SignalX?+
SignalX is an AI-powered SEC filing intelligence platform. It collects every 10-K, 10-Q, 8-K, 13F-HR, Form 4, and SC 13D/G filing from SEC EDGAR (and 사업보고서, 분기보고서, 주요사항보고서 from Korea's DART in beta), parses them into structured data, and generates section-by-section AI summaries grounded in the source text.
How fast does SignalX index new filings?+
Filings appear in SignalX within seconds of being submitted to SEC EDGAR. The pipeline polls EDGAR continuously and runs discover → download → parse → store in real time. AI summaries are generated on-demand when you click "Analyze" and typically complete in under 10 seconds.
Are the AI summaries accurate?+
Summaries are generated by Claude Sonnet (with GPT-4.1-mini as fallback) using strict grounding rules: only numbers and claims that appear in the source text are allowed, no hallucinated padding. Each bullet cites the section it came from. We've tuned the prompts to favor accuracy over fluency — they read like analyst notes, not marketing copy.
What filing types are covered?+
United States (SEC EDGAR): 10-K, 10-Q, 8-K, 20-F, 6-K, 13F-HR, Form 4 (insider transactions), and SC 13D/G (activist/passive >5% stakes). Korea (DART, beta): 사업보고서 (annual), 분기보고서 (quarterly), 주요사항보고서 (material events).
Is SignalX free?+
Yes — the free tier includes 5 AI queries per month, full access to filing tables and stock pages, and the public screeners. Pro ($X/month) unlocks 150 queries, CSV export, and cross-fund signal detection. Premium adds 500 queries and priority support.
How is SignalX different from Bloomberg or Sentieo?+
Bloomberg and Sentieo are general-purpose terminals priced for institutions. SignalX is specifically for SEC and DART filings — narrower scope, much lower price, and the AI summary layer is built for retail and emerging-fund users who don't have $24K/year for a terminal seat.
Can I export the data?+
Yes. Pro users can export filing lists, insider transactions, holdings, and screener results as CSV with a single click. The CSV is BOM-encoded for Excel compatibility.

Start reading filings smarter today.

Free tier includes 5 AI queries per month. Pro unlocks 150 queries, CSV export, and cross-fund signal detection.