Fund Tracker
Documentation
Institutional portfolio holdings analytics powered by SEC 13F filings. Track what top funds own, watch positions change quarter over quarter, and discover overlaps across managers.
What is Fund Tracker?
Fund Tracker is a dedicated institutional portfolio analytics dashboard. It lets you explore what major institutional funds — hedge funds, asset managers, family offices, and pension funds — are holding at each quarterly reporting period, and critically, how those holdings have shifted from one period to the next.
The core use cases are:
See the complete holdings of any fund at any reporting period — sorted, filterable, paginated for funds with thousands of positions.
Compare two reporting periods side-by-side. Instantly see what positions were opened, closed, or resized between filings.
Search for a security across all funds simultaneously. Find out which managers own the same stock and how heavily they're positioned.
A Bloomberg-style top 10 ranked chart shows the largest positions with heat-mapped bars and AUM weight percentages.
Where does the data come from?
All data is sourced from SEC 13F filings — mandatory quarterly disclosures submitted to the SEC by institutional investment managers with over $100 million in qualifying assets under management.
Rock Group ingests 13F filings from SEC EDGAR, parses the XML holding schedules, and loads them into a curated database. Each row represents a single holding (one security) for one fund at one reporting period.
What can you do?
Sortable, paginated table of every position. Columns: security name, CUSIP, reported value, shares held, portfolio weight %. Row colours indicate added/changed/removed vs prior period.
A dedicated diff tab showing three sub-lists: Added positions (green), Removed positions (red), Changed positions (amber with % share change). Select Compare To to activate.
Bloomberg-style ranked list of the 10 largest holdings by value. Heat-mapped bars fading with rank. Shows reported value, portfolio weight, and AUM total.
Side-by-side panels: top 5 increased/new positions (green) and top 5 decreased/exited positions (red). Always visible below Top 10 — shows a prompt to select a comparison period when none is set.
Toolbar search finds securities held across multiple funds at once. Only shows securities held by 2+ funds. Results show fund pills — click any to jump to that fund.
Inline search in the Holdings tab bar. Instantly filters rows by security name — client-side, no API call, no page reload.
Step-by-step guide
Use the Fund dropdown in the compact toolbar at the top of the page. The dashboard auto-selects the first fund alphabetically on first load. All available funds are listed.
Each fund files quarterly. The Period dropdown shows all filing dates available for that fund — most recent first. Select the period you want to analyse.
Set a Compare To period to unlock the Period Diff tab, Biggest Movers panel, and row-level change indicators in the Holdings table. Typically you'd compare the current quarter to the prior quarter.
Use the ⌕ search box next to the Holdings / Period Diff tab buttons. Type any part of a security name to filter the table in real time — no API call needed.
Use the toolbar search field (the wider one on the right side of the filter bar) to search for a security across all funds. Type ≥3 characters to trigger the search.
With a Compare To period set, click Period Diff to see additions/removals/changes. The Biggest Movers panel updates automatically above the table.
Finding securities across multiple funds
The toolbar cross-fund search is different from the within-fund filter. It queries the entire database across all funds and returns only securities that appear in two or more funds simultaneously.
The cross-fund search returns a maximum of 2,000 raw rows from the database (the 2,000 most recent matching records). For very common securities (e.g. AAPL), the result set is naturally bounded. For very rare securities, you may see fewer results.
Comparing two filing periods
Set a Compare To period in the toolbar to activate diff mode. Three views become available:
Positions that appear in the current period but were not present in the comparison period. These are new initiations.
Positions that existed in the comparison period but are absent in the current period. These are full exits.
Positions present in both periods where the share count changed. Shows % change and absolute value delta.
In the Holdings Table (tab 1), rows are also colour-coded: green rows = added, red rows = removed, amber rows = changed. This lets you see the diff in context of the full portfolio without switching tabs.
The Biggest Movers panel (visible above the tabs) shows the top 5 increased positions and top 5 decreased positions ranked by share count change percentage. New and exited positions are also listed here for quick reference.
Don't see a fund you need?
At the bottom of the Fund Tracker dashboard there is a Request a Fund panel. It takes two pieces of information:
Submissions arrive via the same email infrastructure as the site contact form — directly to the Rock Group inbox. We review all requests and prioritise funds with high CIK confidence.
You can look up a fund's CIK on SEC EDGAR full-text search → search the fund name → look for "CIK" in the URL or filer details.
Important limitations
13F data is historical, not real-time.Filings are submitted up to 45 days after the end of each quarter. A fund's actual current holdings may differ significantly from the most recent 13F by the time you view it.
13F is long equity only.Short positions, put options, fixed income, cash, foreign-listed securities, and private equity are not disclosed in 13F filings. The reported portfolio is an incomplete picture of a fund's actual exposure.
Nothing in the Fund Tracker constitutes investment advice, a recommendation to buy or sell, or a guarantee of any market outcome.
The value column reflects the market value reported at quarter-end, not necessarily the current market value.
Rock Group parses SEC EDGAR data as filed. Errors or amendments in the original 13F filing will be reflected in the data.
Not all institutional funds are currently in the database. Coverage is ongoing and expanding. Use the Request a Fund feature to suggest additions.
Rock Group · Fund Tracker Documentation · Last updated June 2026
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