Frequently Asked Questions

Form 13F is a quarterly filing that institutional investors managing over $100 million in qualifying assets must submit to the SEC. It lists all their long U.S. equity holdings—stocks, equity options, convertible debt, and closed-end funds—giving the public a view of what "smart money" owns each quarter.

Any institutional investment manager with at least $100 million in 13F securities (U.S.-listed assets) must file. This includes hedge funds, mutual funds, pension funds, and major holding companies like Berkshire Hathaway. Individual investors and activists may also fall under this rule if they meet the asset threshold.

Filers have 45 days after the end of each calendar quarter to submit their reports. The deadlines are generally:

• Q1 (ends Mar 31): Due ~May 15
• Q2 (ends Jun 30): Due ~Aug 14
• Q3 (ends Sep 30): Due ~Nov 14
• Q4 (ends Dec 31): Due ~Feb 14

Note: If the 45th day falls on a weekend or holiday, the deadline moves to the next business day.

• Exchange-traded equities (Stocks, ETFs)
• Equity options (CALL / PUT)
• Convertible debt (PRN)
• Shares of closed-end funds

Note: Open-end mutual funds are generally excluded as they file Form N-PORT instead.

• PRN: Principal amount on convertible debt securities.
• CALL: A call option position (betting the price will rise).
• PUT: A put option position (betting the price will fall).

Most mutual funds and ETFs file Form N-PORT rather than Form 13F. 13Radar currently focuses exclusively on 13F data, which covers institutional managers and hedge funds.

We poll the SEC EDGAR system every few minutes. Once a new filing is released, it is parsed and live on 13Radar typically within 2-5 minutes.

We employ a multi-layered verification process:

• SEC Cross-Check: Every data point is validated against the original SEC source document.
• Historical Corrections: We automatically detect and fix common filing errors, such as incorrect CUSIPs or values not reported in thousands.
• Split Adjustments: We retroactively adjust historical share counts for stock splits to ensure trend lines are accurate.

While we strive for perfection, the accuracy ultimately depends on the original filings submitted by the funds.

This is often due to a common filing error where funds report values in "actual dollars" instead of "thousands of dollars" (as required by old rules). Our system automatically detects these discrepancies by comparing the reported value against the market price × share count. When a mismatch is found, we apply an algorithmic correction to display the true value.

Please check the original SEC filing link provided on the position page first. If the error persists on our end, please email support@13radar.com and we will investigate immediately.

The Guru List is a curated directory of the world's top investors. It allows you to track their portfolios, see their latest buys and sells, and analyze their historical performance quarter by quarter.

This tool flips the data: instead of looking at a fund, you look at a stock. It shows you which institutions are buying or selling a specific company (e.g., AAPL). It helps you spot institutional accumulation or distribution trends.

This feature highlights stocks that are most widely held by our curated list of top investors. It helps identify high-conviction ideas where multiple "smart money" managers independently agree on the same asset.

We are currently finalizing our secure payment integration with Paddle. During this final integration phase, we have paused new subscription sign-ups to ensure a flawless experience. We expect to launch the full payment system very soon.

Yes! During this "Public Beta" period, we have unlocked most Premium features (such as historical data and advanced screeners) for all registered users for free. You can explore the platform without a credit card.

Once the payment system is live, we will notify all users. You will then have the option to subscribe to the Premium plan, which will come with a 14-day free trial. You will not be charged automatically because we do not currently store your payment information.