# HolderBook

> Institutional ownership of US securities, rebuilt from the SEC filings
> themselves. 8,863 investment managers and 13,860 securities for the
> quarter ending 2026-06-30, with history back to 2018-12-31, plus Schedule 13D and 13G
> activist stakes. Every figure traces to a form somebody filed with the SEC.

What this is: a daily rebuild of Form 13F-HR, Schedule 13D and Schedule 13G
filings into pages for each manager and each security. Nothing is
licensed from a market data vendor. Share prices used for performance figures
are derived from the filings themselves, by taking the median implied price
across every filer reporting the same security in the same quarter.

What this is not, and these limits are stated on the pages too:

- A 13F reports long US equity positions only. Short positions, bonds, foreign
  listings, private holdings and cash are invisible. A manager's disclosed book
  is not their fund
- Positions are disclosed up to 45 days after the quarter ends, so the most
  recent data is already weeks old when it is published
- Returns shown are quarter-end to quarter-end and assume the disclosed book
  was left untouched. They are what a reader following the filing would have
  earned, not the manager's actual performance
- Ownership percentages can exceed 100% because an adviser and a sub-adviser
  may both report the same shares
- Where a filer's numbers contradict what every other filer reported for the
  same security, the figure is withheld rather than published

Every security page, filer page and article is also served as
markdown at the same address with .md appended, for example
https://holderbook.com/stocks/NVDA.md. The markdown carries the same figures without
the surrounding page, and each HTML page links to its own with a
rel="alternate" tag.

Attribution is welcome. If you cite a figure from this site, the underlying
filing is public on EDGAR and worth linking alongside.

## Data

- [https://holderbook.com/methodology/](https://holderbook.com/methodology/): How the figures are assembled, what is corrected, and what is left alone
- [https://holderbook.com/quality/](https://holderbook.com/quality/): The figures checked nightly to catch our own errors, published with the faults actually found

- [https://holderbook.com/funds/](https://holderbook.com/funds/): Every institutional manager filing a 13F, with holdings by quarter
- [https://holderbook.com/stocks/](https://holderbook.com/stocks/): Every security, with its institutional holders and how that changed
- [https://holderbook.com/activist/](https://holderbook.com/activist/): Schedule 13D and 13G stakes, the filings that signal intent to influence a company
- [https://holderbook.com/quarters/](https://holderbook.com/quarters/): Market-wide totals by quarter

## Analysis

- [Alphabet owns $94 billion of SpaceX, and has never had to say so before](https://holderbook.com/articles/spcx-first-filings/): SpaceX listed on 12 June 2026. The quarter ended eighteen days later, which makes the Q2 filings the first public record of who owns it. The largest institutional holder is Google's parent company.
- [The hundred and two who bought NVIDIA at the bottom and never left](https://holderbook.com/articles/nvda-bottom/): In the six months to September 2022, 425 institutions stopped reporting NVIDIA and 167 started. A central bank and an insurance company are still holding.
- [Third Point bought twenty million shares, then the states sued](https://holderbook.com/articles/wbd-arbitrage/): Eleven funds opened positions in a company already agreed to be bought for $31.00 a share. They paid $26.66. Three weeks later, twelve state attorneys general sued to stop it.
- [The second activist arrives at Xponential Fitness](https://holderbook.com/articles/xpof-activists/): Two activist funds hold a quarter of Xponential's listed shares, and a strategic review has been running since April. The arithmetic of who can outvote whom is less simple than the percentages suggest.
- [Eleven managers, one biotech, and a courtroom](https://holderbook.com/articles/nktr-concentration/): 246 institutions hold Nektar. For eleven of them it is a serious share of everything they manage, and one exists to trade the outcome of lawsuits.

## Analysis pages
- [https://holderbook.com/returns/](https://holderbook.com/returns/): What each manager's disclosed book returned against the market, ranked by the difference rather than by absolute return
- [https://holderbook.com/consistent/](https://holderbook.com/consistent/): Managers who beat the market in at least 9 of their last 12 quarters, with an out-of-sample test of whether that predicts anything
- [https://holderbook.com/movers/](https://holderbook.com/movers/): What institutions bought and sold in the most recent quarter
- [https://holderbook.com/confidential/](https://holderbook.com/confidential/): Managers who withheld positions under confidential treatment, and what was revealed when the treatment lapsed
- [https://holderbook.com/restatements/](https://holderbook.com/restatements/): Filings withdrawn and replaced, and what changed between the two versions

## Optional

- [https://holderbook.com/moves/](https://holderbook.com/moves/): Quarterly trading activity by the largest managers
- [https://holderbook.com/sitemap.xml](https://holderbook.com/sitemap.xml): Every page on the site