Facts stay tied to official links.
Each research view keeps source links beside the numbers, so the reader can verify the fact instead of trusting a loose summary.
Source-linked investment research
A cleaner research desk for stocks, ETFs, and index funds.
Lineum turns filings, company updates, fund documents, and approved market data into research views with official links, review dates, risk notes, and the next thing to check.
105 prepared coverage subjects
Official sources beside facts
2026-05-23 latest research build
105Prepared stock research subjects
3Core fund-check routes
2026-05-23Latest research build
Why Core exists
The value is not more information. It is organized information.
Investors already have filings, fund pages, company releases, and market data. The hard part is keeping the facts, source links, assumptions, and next reviews in one readable place.
Old assumptions do not stay invisible.
Review dates, Needs Review flags, and change notes make stale research easier to catch before it shapes a decision.
Start from the current view.
Core is built for people who want the source trail and the plain read without rebuilding the same research file every week.
Research sample
See the format before joining Core.
The public AAPL sample shows the product shape: filing context, financial line items, risk notes, next review, valuation discipline, and official source links.
Consumer technology
Apple Inc.
Nasdaq / Electronic Computers
AAPL
83
- Revenue
- Needs Review SEC XBRL
- Net income
- Needs Review SEC XBRL
- Free cash flow
- Needs Review OCF less capex
- Cash
- Needs Review Latest filing fact
- Total debt
- Needs Review Latest filing fact
- Net margin
- Needs Review Quality signal
Business read
Lineum reads the business, filing context, financial trend, and risk in one place.
What changed
Latest company filing is ready for review.
Latest SEC filing information loads with source context and review notes.
Financial trend
Revenue trend loads here.
Trend context loads here.
Plain read
Needs Review
Risk to watch
Needs Review
Next review
Needs Review
Source confidence
Needs Review
View change
Needs Review
Valuation gate
Needs Review - connect licensed price and market-cap data before scoring valuation.
Official sources
Core workspace
The member workspace for ongoing research.
Core is built to open the supported stock, ETF, and index-fund research library through account access and approved data rights, with source links and review dates beside the facts.
Company filings, fund documents, holdings checks, fee context, concentration notes, and review gates stay in the same workspace.
Lineum is organized around material source changes, not noisy market chatter or unsupported buy/sell language.
Weekly summaries and quarterly resets keep old assumptions, stale facts, and unresolved review items visible.
Coverage preview
Core is for the full research workflow, not a single sample.
These preview cards show the coverage direction without exposing full research views in the public page.
Join Core
Use Lineum as the research desk between source material and decision-making.
Core is the workspace for readers who want source-backed research views, change monitoring, and a clean review cycle for the companies and funds they follow.
Research workflow
Daily checks. Weekly summaries. Quarterly resets.
Lineum is built for investors who want the important changes without rereading every form, fund page, and company update from scratch.
Quarterly reset
Quarterly releases get the deeper review cycle.
The reset is where stale notes, changed risks, fund holdings, and new filing data are reconciled into a cleaner research view.