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How to read the SEC's quarterly portfolio disclosure to understand what an ETF actually holds.
SEC Form N-PORT is the monthly portfolio holdings report that registered investment companies, including most ETFs and mutual funds, file with the SEC. Funds file every month, and the filing for the third month of each quarter is made public roughly sixty days later. It is the authoritative, regulator-filed answer to a deceptively simple question: what does this fund actually own?
The core of an N-PORT filing is a complete position list. For each holding, the fund discloses the security, the number of shares or principal amount, the market value, and the percentage of net assets it represents. Adding those weights up tells you how concentrated the fund is and which names truly drive its returns.
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