How to Read a 13F Filing: Step by Step

A raw 13F can look like an intimidating table of CUSIPs and dollar values. But once you know what each column means, a filing tells a clear story about a manager's conviction and how their thinking changed over the quarter.

Start with the totals

Before any single position, look at the total portfolio value and the number of holdings. A fund with 15 positions is expressing high conviction; a fund with 3,000 positions is running a diversified or quantitative book where no single name matters much. This context changes how you read everything else.

Read each position in three numbers

For every holding, focus on:

• Market value — the dollar size of the position at quarter-end
• Portfolio weight — that value divided by the total, showing how important the position is to the fund
• Share count — the raw number of shares, which is what you compare across quarters

Value can move simply because the stock price moved. Share count is the cleaner signal of whether the manager actively bought or sold.

Compare quarter over quarter

The real insight comes from comparing two consecutive filings. That comparison produces change flags:

• New Position — the fund did not hold this name last quarter
• Increased — the share count went up
• Decreased — the share count went down
• Unchanged — the share count is the same
• Cleared Out — the fund fully exited a position it held last quarter

A cluster of "Increased" flags in one sector, or a high-conviction "New Position" near the top of the book, is often more telling than the static holdings list.

Watch for puts and calls

If a line is marked as a put or call option, the manager is expressing a view through derivatives, not owning the stock outright. A large put position can even signal a bearish stance — a nuance that a simple "top holdings" list would hide.

Put it in context

Remember that the filing is up to 45 days old by the time you see it. Use it to understand a manager's process and direction, not as a real-time trade signal. Our 13F limitations guide covers exactly what this data can and cannot tell you.