Guide

How to read this site

Five minutes here saves a lot of confusion. Everything on Mustard Seed Investor comes from public filings; this page explains what those filings can and can't tell you.

1. What is a 13F?

A quarterly report that US investment managers with over $100 million in US stocks must file with the SEC. It lists the stocks they owned on the last day of the quarter. We list 101 well-known managers and show their holdings, what changed since the quarter before, and how that compares with other managers. Not every manager on the list files every quarter: 94 have filed a 13F in the past year, and 92 filed for the latest full quarter (Q2 2026). Counts elsewhere on the site that say “of N filed” use that currently-filing group as the denominator, not the full list.

2. The 45-day lag

Managers have up to 45 days after a quarter ends to file, so what you see is at least 6 weeks old and they may have traded since. The newest quarter fills in as reports arrive; we call a quarter full once most tracked managers have filed. Totals and rankings use the latest full quarter (Q2 2026).

3. What's included, and what isn't

13Fs show stocks a manager owns. They do not show short bets, cash, bonds, most foreign shares or private investments, so a portfolio here is only part of the picture.

Calls and puts appear in 13Fs but are listed separately on manager pages and are left out of portfolio values and weights, because the reported value is the underlying stock's, not what was paid.

4. Politicians' trades are different

Politician trades come from STOCK Act Periodic Transaction Reports, not 13Fs. They show individual trades (with dates), not a full portfolio, and they can be filed up to 45 days after the trade. Under the STOCK Act, members of Congress report each trade as a dollar range (e.g. $1,001–$15,000), not an exact amount. Any dollar figure we show for politicians is an estimate using the midpoint of each range. Days between a politician's trade and the date they reported it. The STOCK Act deadline is 45 days after the trade; anything later is marked Late. We list every current member of Congress; most never file stock trades. The same stock on the same day can appear several times: reports list one line per account (the “Subholding Of” account, shown in the Account column), so the same purchase in an IRA and in a brokerage account is two lines, not a duplicate. Only a line marked “Amended” in a later report replaces the original line it restates. Coverage note: the trades we can import come from House reports — the Senate's disclosure site refuses automated access, so Senators may show no trades here (or only trades from earlier House service) even though their Senate reports exist. That is a gap in our source, not evidence that a Senator doesn't trade.

5. How “buying” and “selling” are measured

We compare each manager's share count with the quarter before. New = they didn't own it before. Added = more shares. Trimmed = fewer shares. Sold = all shares gone. A stock going up in price is never counted as buying.

Est. net buying: For each manager, the change in shares × this quarter's price, added up across all managers. A positive number means more shares were bought than sold. Price moves alone never count.

Glossary

13F filing: A quarterly report that US investment managers with over $100 million in US stocks must file with the SEC. It lists the stocks they owned on the last day of the quarter.
45-day lag: Managers have up to 45 days after a quarter ends to file, so what you see is at least 6 weeks old and they may have traded since.
Long positions only: 13Fs show stocks a manager owns. They do not show short bets, cash, bonds, most foreign shares or private investments, so a portfolio here is only part of the picture.
Options: Calls and puts appear in 13Fs but are listed separately on manager pages and are left out of portfolio values and weights, because the reported value is the underlying stock's, not what was paid.
Est. net buying: For each manager, the change in shares × this quarter's price, added up across all managers. A positive number means more shares were bought than sold. Price moves alone never count.
Avg. weight: On average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
Conviction: How much of the manager's reported portfolio this one position is. A 10% position is a much bigger bet than a 0.1% one.
Consensus buy: Several superinvestors opening or clearly adding to the same stock in the same quarter.
Concentration: The share of a portfolio in its 10 largest positions. High = a few big bets; low = spread out.
Turnover: How many positions were opened or closed this quarter compared with the number held.
Politician dollar ranges: Under the STOCK Act, members of Congress report each trade as a dollar range (e.g. $1,001–$15,000), not an exact amount. Any dollar figure we show for politicians is an estimate using the midpoint of each range.
Filing delay: Days between a politician's trade and the date they reported it. The STOCK Act deadline is 45 days after the trade; anything later is marked Late.
Watchlist & pins: Your watchlist and pinned managers are saved in this browser only (no account). Use a sync code on the Watchlist page to copy them to another device.
CIK: The SEC's ID number for a filer (Central Index Key). Every manager, company and fund has one; it is the surest way to find all of someone's filings on EDGAR, even when names change or are spelled differently.
CUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it.
SIC code: The SEC's 4-digit industry code (Standard Industrial Classification) for a company's main line of business - for example 3571 is electronic computers.
GICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect.
Consensus signal: Our score for a stock both groups are moving into: superinvestor buying plus members of Congress buying in the same period. 'Strong signal' means a score of 3 or more AND superinvestors net bought the stock; a stock they net sold is capped at 'Watch'. It is a starting point for research, not a buy recommendation.
Spot price: The price of gold or silver for immediate delivery — what one troy ounce costs right now. The prices on the Precious Metals page are COMEX futures prices, which track the spot price closely.
Troy ounce: The unit gold and silver are priced in. One troy ounce is about 31.1 grams — a little heavier than the regular ounce (28.3 grams) used for everyday things.
Gold-to-silver ratio: How many ounces of silver it takes to buy one ounce of gold (the gold price divided by the silver price). When the number is high, silver is cheap compared with gold; when it is low, silver is expensive compared with gold.
ETF: An exchange-traded fund: a basket of investments you can buy and sell like a single stock. GLD and SLV hold physical gold and silver; miner ETFs hold shares of mining companies instead.
Miner: A company that digs gold or silver out of the ground. Mining shares usually move more sharply than the metal itself, in both directions, because a miner's costs stay put while the metal price moves.
Junior miner: A small mining or exploration company, often still proving up its deposits. Juniors are the riskiest miners: their shares can multiply or collapse on drilling results and financing news.
COMEX: The New York exchange (part of CME) where gold and silver futures trade. Its front-month futures prices are the ones most often quoted as the 'spot' price of gold and silver.
Signals on the Stocks page: High consensus = held by 30 or more tracked managers. Net bought by 10+ = at least 10 more managers bought or added than trimmed or sold this quarter. New to many = 5 or more managers opened a brand-new position.

Beginner mode

If the site feels dense, turn on beginner mode: it hides the technical extras (spreadsheet downloads and ID numbers) and adds a short plain-English summary to stock and manager pages. It changes nothing about the data — it is the same filings, explained more simply. The setting is saved in this browser only.

Good habits

Use this as a starting point for your own research, not a buy list. The managers may already have sold.
Check the original filing (every manager and trade links to it) before relying on a number.
Look for patterns across several managers or quarters rather than one big move.

Educational and informational only. Not personalized investment advice. Data from public SEC 13F and STOCK Act filings, may be delayed or contain errors; verify with the original filings. Full disclaimer · Methodology