13F managers

13F managers, scored on what they disclosed

Vestiio follows each 13F filing from the day it becomes public and scores managers on how consistently their disclosed books have done against other managers filing for the same quarter. Below are the five highest scores and a page for each of a set of well-known managers.

Ranking of 30 October 2026, covering 1,085 managers.

The five highest scores

A manager is ranked once it has at least 12 completed quarters with, on average, at least 80% of the book priced.

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RankManagerScoreOne-year figureQuartersReported book
1Keystone Investors Pte LtdMedium confidence65.3+46.4%13$1.9 billion
2Fairmount Funds Management LLCMedium confidence64.7+188.6%15$1.5 billion
3Windacre Partnership LLCMedium confidence64.7+32.5%14$10.1 billion
4Peconic Partners LLCHigh confidence64.4+60.4%20$8.0 billion
5Blue Whale Capital LLPMedium confidence63.9+49.3%19$3.2 billion

Scores estimate the reported equity book, followed from the day each filing became public. They do not measure a fund’s actual returns, since a 13F leaves out cash, short positions, private holdings and everything traded between filings. How the score works

The full ranking

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Fund Explorer is informational research only. Not investment advice. Vestiio is not supervised by FINMA. SEC 13F filings are delayed manager-level disclosures and do not show the full portfolio, including cash, shorts, private assets, many derivatives, fees, leverage, or trades made between reporting dates.