# Livermore

> Livermore (https://livermore.club) is a free, bilingual (English and Traditional Chinese) website with US stock ownership data taken directly from public filings: insider trading (SEC Form 4), institutional holdings (SEC 13F, including a curated list of 47 superinvestors), holders of more than 5% (Schedule 13D and 13G), insiders' proposed sales (Form 144) and stock trades reported by politicians (members of the U.S. Congress: House and Senate periodic transaction reports). Every number links back to the original filing. AI agents can read the pages or query the same data through a public, read-only MCP server at https://livermore.club/mcp, which also serves Taiwan stock data (see below).

The data is as filed. Livermore shows no US stock prices (the only prices are those in the filings themselves and the SEC's price for fails-to-deliver; each company's market cap is calculated from the latest daily close, which itself is not shown) and makes no estimates beyond clearly labeled ones (for example the estimated volume of politician trades, which adds up the midpoints of the reported amount ranges); nothing on the site is investment advice.

## Data coverage

- Insider trades: SEC Form 4 filings since July 2021 (open-market purchases and sales, grants, option exercises, tax withholding, gifts and the other transaction codes). Multiple lots of one filing are combined per transaction type, as on OpenInsider.
- Institutional holdings: SEC 13F-HR filings since Q1 2021 for all filers (about 9,000 institutions per quarter). 13F is filed up to 45 days after the quarter ends and covers long positions in US-listed securities only. Share changes between quarters are converted for stock splits and reverse splits; share counts are shown as filed.
- Superinvestors: 47 curated investors, for example Warren Buffett (Berkshire Hathaway), Bill Ackman (Pershing Square) and Li Lu (Himalaya Capital): holdings, quarterly buys and sells, and their own Form 4, 13D and 13G filings.
- 5% owners: Schedule 13D (holders who may seek to influence the company) and 13G (passive holders) filings on SEC EDGAR. Structured filings (voluntary since December 18, 2023, required since December 18, 2024) carry the percent of the class, shares and event date; older SC 13D and SC 13G filings since 2021 list only the filer, the company and the date. Current 5% holders come from each holder's latest filing.
- Proposed insider sales: Form 144 notices since 2023 (electronic filing required since April 13, 2023). A notice is a plan to sell, not a completed sale; notices with a clearly misreported market value are flagged and left out of lists and totals.
- Politician trades: periodic transaction reports (PTRs) filed since January 1, 2020 by members of the House (with the U.S. House Clerk) and senators (with the Senate Office of Public Records, eFD). Lists, counts and totals show listed securities by default: stocks (including ADRs), ETFs and options. Treasury bills and notes, municipal and corporate bonds, private companies, private funds, crypto and other assets appear with ?asset=all on the Politicians pages (asset=all or asset=other in the MCP tools). Amounts are the statutory ranges members report, such as $1,001-$15,000, not exact values. Scanned and paper reports are listed but not read.
- Company filings: the list of 10-K, 10-Q, 8-K, 20-F and 40-F filings and amendments since 2009, with 8-K item codes and links to the documents on SEC.gov. Livermore lists filings; it does not store their text.
- Financial statements: income statement, balance sheet and cash flow from the XBRL data in 10-K, 10-Q, 20-F and 40-F filings, as filed, in the reporting currency (with approximate US dollar figures at FRED H.10 exchange rates for other currencies), with margins, year-over-year growth, the date results were reported (the first 8-K with Item 2.02) and the cover-page share count. Q4 and single-quarter cash flows are derived by subtraction and marked. Foreign companies that file Form 20-F or 40-F have annual statements only.
- Short selling: FINRA short interest (twice a month since 2021, with days to cover), FINRA daily off-exchange short volume (last two years), FINRA weekly ATS (dark pool) and OTC volume, and SEC fails-to-deliver with the SEC's price. There is no short interest as a percent of float.
- Market cap: each company's latest daily close times the shares outstanding on its latest 10-K or 10-Q cover page, adjusted for later stock splits and recalculated every US trading day after the close. Companies without a recent close or cover-page share count, foreign companies filing Form 20-F (their US shares are usually ADSs), companies whose cover lists several share classes separately, multi-fund ETP trusts whose products share one cover-page share count, and values below $1 million have none.
- Politician profiles: official portraits, seat, party, leadership roles, current committee and subcommittee seats with titles, birthday, official website and social accounts, from the unitedstates project (public domain), refreshed daily; congressional district maps from the U.S. Census Bureau.
- Taiwan stocks (through the MCP server only): stocks and ETFs listed on the Taiwan Stock Exchange (TWSE) and the Taipei Exchange (TPEx), with daily prices, institutional investors' buying and selling, margin trading, securities lending and foreign holding since 2021, monthly revenue since January 2013, quarterly financial statements from MOPS since 2013, dividends, company profiles written by AI from annual reports, production sites researched by AI, and the TPEx industry value chains. Taiwan's daily prices are government open data, so they are returned; the data is provided under Taiwan's Open Government Data License, version 1.0 (https://data.gov.tw/license), which requires naming the sources. Livermore's Taiwan website (tw.livermore.club) is in Traditional Chinese only and is not open to AI agents.
- Updates: new SEC filings are loaded once a day after 11:30 PM US Eastern, market caps every weekday after the US market close and politicians' reports to Congress once a day at about 10:15 AM US Eastern; the ticker list is refreshed daily and the CUSIP-to-ticker mapping weekly.

## Main pages

English pages start with /en/; the Traditional Chinese version of every page uses /zh/ instead (for example https://livermore.club/zh/stock/AAPL). Tickers are uppercase with a dot for share classes (BRK.B), CIKs are 10 digits with leading zeros, politicians (members of Congress) are identified by their bioguide ID (P000197), and quarters are written like 2026-q2.

- [Stock](https://livermore.club/en/stock/AAPL): /en/stock/{TICKER} is the overview, with the company's market cap; /en/stock/{TICKER}/financials shows five years of financial statements (/financials/quarterly for eight quarters); /en/stock/{TICKER}/filings lists 10-K, 10-Q and 8-K filings (?form=8-K, ?item=2.02); /en/stock/{TICKER}/shorts shows short interest, daily short volume, fails-to-deliver and ATS volume; /en/stock/{TICKER}/insiders lists Form 4 trades; /en/stock/{TICKER}/holders lists 13F holders (/holders/{quarter} for a given quarter, /holders/{quarter}/vs/{quarter} to compare two quarters); /en/stock/{TICKER}/superinvestors lists the superinvestors that hold it; /en/stock/{TICKER}/ownership lists current 5% holders, 13D and 13G filings and Form 144 notices; /en/stock/{TICKER}/politicians lists politicians' trades in the company.
- [Institution](https://livermore.club/en/institution/0001067983-berkshire-hathaway): /en/institution/{cik}-{slug} shows the latest 13F holdings and its 13D and 13G filings; add /{quarter} for a given quarter, /{quarter}/vs/{quarter} to compare, or /holding/{TICKER} for one stock's history.
- [Insider](https://livermore.club/en/insider/0001214156-cook-timothy-d): /en/insider/{cik}-{slug} lists one person's Form 4 trades across companies.
- [Latest insider trades](https://livermore.club/en/insiders): /en/insiders, plus screens at /en/insiders/cluster-buys, /en/insiders/ceo-cfo-buys, /en/insiders/top-buys-week, /en/insiders/top-buys-month, /en/insiders/top-sells-week and /en/insiders/top-sells-month.
- [Superinvestors](https://livermore.club/en/superinvestors): the list and combined holdings; /en/superinvestors/activity for quarterly buys and sells; /en/superinvestors/realtime for their own Form 4, 13D and 13G filings.
- [13F institutions](https://livermore.club/en/institutions): the latest 13F filings.
- [5% owners and Form 144](https://livermore.club/en/ownership): the latest Schedule 13D filings; /en/ownership/13g for 13G and /en/ownership/144 for Form 144 notices.
- [Politicians](https://livermore.club/en/politicians): the politicians (members of the U.S. Congress, House and Senate) who report stock trades, one card each, with a name search (?q=nancy+pelosi); /en/politicians/trades lists the latest trades in listed securities, with filters (add ?asset=all for every asset); /en/politician/{bioguide}-{slug} shows one politician's profile (photo, seat, party, leadership roles, committees, district map), trades and reports (for example /en/politician/P000197-nancy-pelosi). The former /en/congress addresses redirect permanently to these pages.
- [Short interest](https://livermore.club/en/shorts): every stock's FINRA short interest for a settlement date, ranked by the change (?sort=change_pct, days_to_cover or short_shares; ?date= one of the last 12 settlement dates).
- [Glossary](https://livermore.club/en/glossary) and [About the data](https://livermore.club/en/about): transaction codes, 13F, 13D, 13G and Form 144 rules, Congress reporting rules, 10-K, 10-Q and 8-K items, short interest vs. short volume, data sources and limitations.

## MCP server for AI agents

- Endpoint: https://livermore.club/mcp (Streamable HTTP, no sign-in, read-only, stateless). It serves MCP protocol revision 2026-07-28 and the earlier revisions 2025-11-25, 2025-06-18, 2025-03-26 and 2024-11-05.
- Claude Code: `claude mcp add --transport http livermore https://livermore.club/mcp`
- Other clients: add a remote (Streamable HTTP) MCP server with the URL https://livermore.club/mcp and no authentication.
- Tools: search, get_stock, get_insider_trades, get_insider_lists, get_stock_13f_holders, get_institution, list_superinvestors, get_superinvestor_activity, get_major_holders, get_ownership_filings, get_form144_notices, get_politician_trades, get_politician, get_financials, list_filings, get_short_interest, list_short_interest, screen_stocks, tw_search, tw_get_stock, tw_get_monthly_revenue, tw_get_financials, tw_get_daily_trading, tw_get_market, tw_list_institutional_ranking, tw_screen_stocks, tw_get_industry_chain, get_data_coverage. get_politician also returns the politician's profile: photo URL, position, district code, birthday and age, official website, social accounts, Wikipedia, leadership roles and current committees.
- get_financials returns a company's income statement, balance sheet and cash flow (annual or quarterly, with margins, year-over-year growth and the earnings release date) and its cover-page share count. list_filings lists 10-K, 10-Q, 8-K, 20-F and 40-F filings with 8-K item codes, for one company or market-wide (up to 30 days), with links to the documents on SEC.gov; Livermore does not store filing text, so fetch the sec_url to read a filing. get_short_interest returns a stock's FINRA short interest, daily short volume, ATS volume and SEC fails-to-deliver, and list_short_interest ranks every stock's short interest for a settlement date.
- get_stock includes the company's market cap (the latest close times the cover-page shares outstanding, or the reason there is none), and screen_stocks lists companies by market cap range (for example around $100 million) with their tickers, industries and links, for an agent to research further. No US stock prices are returned.
- Taiwan stocks: start with tw_search to find a code (TSMC is 2330), then tw_get_stock (overview, AI-written company profile, industry chains, production sites), tw_get_monthly_revenue, tw_get_financials, tw_get_daily_trading (prices, institutional, margin and foreign holding data), tw_get_market, tw_list_institutional_ranking, tw_screen_stocks and tw_get_industry_chain. Taiwan results are in New Taiwan dollars (currency TWD), link to tw.livermore.club (Traditional Chinese only) and carry an attribution with the sources, the license and the fields Livermore calculated; keep it when you present the data.
- Results are JSON (money in USD except financial statements, which are in the company's reporting currency with a usd_rate to convert them; percentages as numbers; ISO dates), and every item includes its livermore.club URL.
- Limits: at most 200 rows per call and 60 requests per minute per IP address.
- [Plain-language guide](https://livermore.club/en/mcp): example questions and three-step setup for Claude, ChatGPT, Cursor and other apps.
- [Developer documentation](https://livermore.club/en/developers): tool reference, parameters and client setup.

## Optional

- [Sitemap](https://livermore.club/sitemap.xml)
- [Traditional Chinese home page](https://livermore.club/zh)