What Is Form N-PORT? Fund Holdings and the Reporting Lag
Every question an institution asks about a fund eventually comes back to what the fund owns. How quickly it can meet redemptions, how much interest rate risk it carries, which issuers it is concentrated in and whether its name matches its strategy all depend on the portfolio. For U.S. registered funds, the most complete public record of that portfolio is Form N-PORT.
N-PORT is detailed. It lists every position a fund holds, with identifiers, values and a long set of attributes, plus fund-level figures on net assets, flows and risk. It is also late. Under the rules in force today, the public sees one month of holdings per fiscal quarter, released up to 60 days after the quarter ends. By the time a risk team or wealth platform reads a fund’s latest public N-PORT, the portfolio it describes can be two to five months old.
This guide covers what Form N-PORT is, who files it, which parts the public can see and when, how the filing schedule has changed since 2024, and how to work with holdings data that always describes the past.
What is Form N-PORT?
Form N-PORT is the monthly portfolio holdings report that U.S. registered investment companies file with the SEC under Rule 30b1-9 of the Investment Company Act. The SEC adopted it in 2016 as part of its reporting modernization rules, and it replaced Form N-Q, the older quarterly holdings form. You will also see it written as NPORT or Form NPORT, and public filings appear on EDGAR under the form type NPORT-P.
The filers are registered open-end funds (mutual funds and most ETFs), registered closed-end funds, including interval funds and tender offer funds, and ETFs organized as unit investment trusts. Money market funds and small business investment companies are excluded; money market funds report on Form N-MFP instead. Business development companies are not registered investment companies, so non-traded BDCs disclose their portfolios through the schedule of investments in their 10-Q and 10-K filings rather than through N-PORT.
Each report covers a single month-end and has two layers.
The fund-level layer covers net assets, assets and liabilities, monthly returns, shareholder flows (sales, redemptions and reinvestments), and, for funds with meaningful debt exposure, portfolio risk metrics. Those metrics show how the portfolio’s value would change with a shift in interest rates or credit spreads.
The holdings layer lists each position separately: the issuer, identifiers such as CUSIP, ISIN and LEI, the balance held, the value in U.S. dollars and as a percentage of net assets, the asset and issuer type, the country and currency, and whether the fund values it with observable or unobservable inputs. Debt positions add maturity, coupon type and rate, and default status. Derivatives add the counterparty, the reference asset and the contract terms. Securities on loan and the collateral received are reported too.
That level of detail is what makes N-PORT the standard input for holdings-based analysis of U.S. funds. It is also why the SEC has revisited, more than once, how much of it to release and how soon.
Which N-PORT data is public, and when
Funds report holdings for every month, but the public does not see every month. Under the rules in force today, a fund files the reports for all three months of a fiscal quarter together, no later than 60 days after the quarter ends. The SEC releases only the third month’s report, and it becomes public when it is filed. The first two months stay with the SEC.
Some items stay confidential even in the public report. A fund’s liquidity classification of each holding, certain derivatives data, and the delta of convertible bonds are nonpublic for every month. Funds may also group up to 5% of net assets as “miscellaneous securities” and report those positions to the SEC without naming them publicly. For a reader trying to judge a fund’s liquidity from the outside, that first point matters: the fund’s own view of how liquid each position is never appears in the public filing.
The public schedule has been under revision since 2024, and the outcome is still open. Three versions of the rule are worth knowing.
The rules in force today are the ones described above. A fund files its monthly reports together within 60 days after the end of each fiscal quarter, and only the third month of the quarter becomes public, on filing.
In August 2024, the SEC adopted amendments that would require each month’s report within 30 days after month end and make every month public 60 days after month end. That would have tripled the number of public N-PORT snapshots from four a year to twelve. A fund trade group challenged the rule in the Fifth Circuit, and in April 2025 the SEC pushed the effective and compliance dates back two years while it reviewed the amendments. Fund groups with $1 billion or more in net assets now have until November 17, 2027, and smaller groups until May 18, 2028.
In February 2026, the SEC proposed a middle course. Each month’s report would be due within 45 days after month end, and public release would return to the third month of each fiscal quarter, 60 days after the quarter ends. The proposing release gives the reasoning: more frequent publication raises the risk that outside traders reverse-engineer a fund’s strategy or trade ahead of its purchases and sales, and the SEC said falling costs for AI and other analytical tools increase that risk. The same proposal would remove some items, such as the names-rule reporting and the convertible bond delta, and add others, including ticker symbols and separate net assets and flows for ETF share classes. The comment period closed April 24, 2026.
As of this writing, the 2026 proposal has not been adopted. For planning purposes, the practical reading is that quarterly public N-PORT data, released with a delay of up to 60 days, is likely to remain the norm for some time. Check the SEC’s rulemaking page for the current status before relying on any of these dates.
The holdings lag: three dates on every filing
Every N-PORT filing carries three dates that are easy to blur together. The report date is the month-end the holdings describe. The filing date is when the fund submitted the report to the SEC. The public date is when anyone outside the SEC can read it. Under today’s rules, the filing date and public date are the same for the third month of a quarter, and the first two months never become public at all.
The gap between the report date and the day you read the filing is the holdings lag, and it moves in a sawtooth. Take a fund with a calendar-quarter fiscal year that files on the last permitted day. Its March 31 holdings become public around May 30, when they are 60 days old. They remain the latest public snapshot until the June 30 holdings appear around August 29, by which point the March data is about 150 days old. Then the cycle resets. The SEC’s own example in the 2026 proposing release makes the same point from the fund’s side: a position bought on January 1 by a fund with a March quarter-end would not need to be disclosed until May 30.
How old is the latest public N-PORT?
Age in days of a fund's most recent public Form N-PORT holdings, through a calendar year. Example fund has calendar fiscal quarters and files on the last permitted day.
Source: SQX calculation from SEC filing deadlines (Rule 30b1-9; SEC Release IC-35962, Feb. 18, 2026). Funds that file before the deadline would sit lower on the chart. The Feb. 2026 proposal had not been adopted as of November 2026.
Under the 2024 amendments, the sawtooth would have been shallower, running from about 60 days to about 90, because a new month would be released every month. The 2026 proposal would keep today’s quarterly shape, with each snapshot published 60 days after quarter end.
Three things can change inside a portfolio during that window, and each matters to a different reader.
Positions change. An active manager can build or exit a position entirely between snapshots, and the SEC cited exactly that as a reason to keep release quarterly. A fund with high turnover will drift further from its last public N-PORT than an index fund will.
Weights change. Even with no trading, market moves shift each position’s share of net assets. A bond fund’s duration, a sector fund’s top-ten concentration and an equity fund’s country mix all drift with prices.
The fund itself changes. Net assets rise or fall with flows, so a position that was 2% of the fund at the report date may be a larger share after heavy redemptions. For a semi-liquid fund in a tender cycle, that is the scenario that matters most.
Fiscal calendars add a fourth complication. Public N-PORT snapshots follow each fund’s fiscal quarter, which may differ from the calendar quarter. A fund with a March fiscal year-end publishes snapshots as of June, September, December and March, while a fund with an October year-end publishes as of January, April, July and October. Put the two in the same report and the holdings describe different months.
Look-through: seeing exposure inside a fund
Look-through analysis replaces a fund position with the securities the fund holds, scaled to the size of the position. A $10 million position in a fund with 4% of net assets in one issuer’s bonds becomes $400,000 of exposure to that issuer. Done across a whole book, it answers questions that fund names and category labels cannot.
Risk teams use it to aggregate issuer and counterparty exposure across direct holdings and funds, so a large indirect position in one name does not hide inside several funds. Wealth platforms use it to check that a model portfolio’s real sector, country and credit mix matches what the client was told, and to spot when two funds in the same model hold largely the same securities. Collateral and lending desks use it to see what sits under a fund they accept as collateral, which feeds the haircut discussion from the first post in this series.
N-PORT supports most of that work directly. The identifiers on each holding let it be matched to a security master, which in turn supplies sector, rating and issuer hierarchy. Asset type, country and currency are reported on the form. Value as a percentage of net assets gives the weight. For bond funds, maturity and coupon data allow duration and maturity profiles to be rebuilt from the holdings rather than taken from a fact sheet.
The limits come from the form itself and from the lag.
The public view is incomplete. The miscellaneous securities bucket lets a fund keep up to 5% of net assets unnamed, and the fund’s own liquidity classifications are nonpublic. Look-through can estimate liquidity from the holdings, but it cannot show how the fund classified them.
Identifiers are uneven. Private credit, bank loans and some structured holdings often lack a CUSIP or ISIN, and names for the same issuer vary across filers. Matching those positions takes more work than matching listed equities and corporate bonds, and a share of holdings will not match cleanly.
Nesting multiplies the lag. When a fund holds other funds, its N-PORT lists the underlying fund as a single line. Seeing through it requires the underlying fund’s own N-PORT, which may be as of a different month and carry its own lag. A fund of funds can end up described by holdings from two or three different dates.
Reading through the delay
Teams that rely on holdings data manage the lag with a few working rules.
Carry the as-of date with every number. A look-through exposure, a duration figure or a concentration measure should travel with the report date of the holdings behind it. When a committee asks why two reports disagree, the answer is often that they were built from snapshots three months apart.
Use fresher sources where they exist. N-PORT is the floor, and many funds publish more. ETFs that rely on Rule 6c-11 post their full holdings every business day. Open-end funds must post complete holdings for their first and third fiscal quarters on their websites, and annual and semiannual shareholder reports, filed on Form N-CSR, carry a full schedule for the second and fourth. Many sponsors also post monthly holdings or top-ten lists voluntarily. A sound process takes the most recent complete source for each fund and records which one it used.
Size the drift to the fund. A broad index fund’s last public snapshot is a reasonable proxy for months. A concentrated active fund, a high-turnover strategy or a fund with heavy flows can look materially different within weeks. Turnover, flows and the fund’s own fact sheet give an early read on how far the holdings may have moved.
Compare fund-level data that updates faster. Net assets, NAV and flows are available far more often than full holdings. If net assets have fallen sharply since the last snapshot, the weights in the remaining portfolio have shifted even if the position list has not.
Re-run when the snapshot rolls. Holdings-based measures should refresh when a new N-PORT or sponsor file lands, and the change from the prior snapshot is useful in its own right. A rising weight in hard-to-value assets, a growing miscellaneous bucket or a new borrowing line can each say something before the fund says it.
How SQXray handles fund holdings
SQXray, SQX’s fund-level dataset, starts with N-PORT and adds sponsor-published holdings where funds release them more often. For each fund, SQXray ranks its available sources and uses the most recent complete portfolio, whether that is a public N-PORT filing, a daily ETF holdings file or a monthly holdings report from the sponsor’s website.
Every holding in SQXray carries its report date and the source it came from, so a user can see how current each fund’s portfolio is and where it was taken from. Holdings keep the detail N-PORT provides, including identifiers, value and weight, asset and issuer category, country, currency, fair value level and, for debt, maturity, coupon and default status. SQXray then resolves identifiers across sources so the same security can be matched across funds and to SQX reference data.
Those holdings feed the rest of the dataset: sector and fixed income exposure, the liquidity measures covered earlier in this series, and the fund-level fields on fees, flows, managers and proxy votes that later posts will cover. SQX delivers SQXray files by SFTP or Amazon S3, so the data loads into the risk, platform and monitoring systems teams already run.
From one fund to many
N-PORT answers what a single fund owns as of a single month-end. Most portfolios hold more than one fund, and the harder questions start when those holdings are combined. Two funds with different names and managers can own many of the same securities, and a fund of funds can stack one fund’s holdings inside another’s, each layer with its own report date. Measuring that overlap, and looking through funds that hold other funds, is the subject of the next guide in this series.
See the holdings behind your funds
Send SQX the list of funds you hold, cover or accept as collateral, and we will return an SQXray holdings profile for each one: the most recent portfolio, its report date and source, and the exposure it rolls up to. Tickers or CUSIPs are fine. Email inquiries@sqx.com, contact us, or visit the SQXray product page to see every field the dataset carries.
For more SQX news,
follow SQX
on LinkedIn and subscribe to our
LinkedIn
newsletter to stay ahead of the curve.
Latest News
