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Quant fund, long-only 13F filer

Two Sigma Investments

Two Sigma Investments is a data-science-driven quant firm founded by John Overdeck and David Siegel in 2001, using machine learning and distributed computing to trade systematically. It discloses US-listed long equity (and some options) positions each quarter on SEC Form 13F — bonds, cash, private businesses and non-US holdings are not in that filing.

132.9BUSDreported value
5,017positions
+12.4BUSDon the prior filing
WESTERN DIGITAL CORPlargest holding, 1.1%

What do people ask about Two Sigma Investments?

From live data
What is Two Sigma Investments's biggest holding?1.1%

As of the quarter ended 30 June 2026, the largest disclosed position was WESTERN DIGITAL CORP, about 1.1% of the disclosed US-listed portfolio by reported value.

What did Two Sigma Investments buy in Q2 2026?1,084

1,084 new positions were disclosed for the quarter ended 30 June 2026; the largest were INTU, XLE, SPCX. Adds and trims are listed in the quarterly-changes table on this page.

How concentrated is the portfolio?5%

Broadly diversified. The top five positions are 5% of disclosed value and the top ten are 8%.

When is Two Sigma Investments's next 13F due?

13F filings for the quarter ended 30 September 2026 are due by 16 November 2026 — managers have 45 days after each calendar quarter ends. Whether Two Sigma Investments files is up to the manager; we show whatever EDGAR receives.

Does this show the whole portfolio?

No. Form 13F covers US-listed long equity and some options only — no short bets, bonds, cash, private businesses, non-US holdings or timing inside the quarter. Amended filings replace originals; this page always shows the latest canonical version.

Read the form itself on SEC EDGAR or see our plain-words guide to 13F filings — Two Sigma Investments may have already changed these positions since 30 June 2026.

References
  1. SEC EDGAR Form 13F-HR, quarterly, up to 45 days delayed. Filings are public records. Ticker mapping via SEC public files and OpenFIGI.
  2. Finazon prior-day close, indicative (IEX-derived, not the official close), some closes dollar-rounded at the source
Two Sigma Investments 13F — questions people ask · The Distributed