Form 13F is a quarterly holdings report. Institutional investment managers who exercise investment discretion over $100 million or more in "Section 13(f) securities" (mostly US exchange-listed shares, plus certain options and convertible securities) must file it within 45 days after the end of each calendar quarter.
What it shows
Each holding on the last day of the quarter: the issuer's name, the class of security, its CUSIP, the value, the number of shares, whether it is a put or a call, and who has investment discretion and voting authority. Since 2023, values are reported in dollars; earlier filings reported them in thousands.
What it does not show
Short positions, cash, most bonds, shares listed outside the US, private investments, when during the quarter anything was bought or sold, and at what price. The guide what a 13F shows and what it hides goes through the gaps.
On Listed
Fund pages show each manager's latest quarter as filed, with the change from the quarter before. Holdings come from the SEC's quarterly 13F data sets, so they can be up to three months behind the filings themselves. Listed keeps no CUSIP master, so holdings are not linked to company pages.