SEC EDGAR Form 13F
Two Sigma Investments
Two Sigma Investments is associated with a data- and technology-driven investment platform co-founded by David Siegel and John Overdeck.
Latest Form 13F: 27287 long U.S. equity positions, $702.7B reported value for the period ended Jun 30, 2026, led by WESTERN DIGITAL CORP, WESTERN DIGITAL CORP, and WESTERN DIGITAL CORP.
CIK: 1179392 · Filed: Aug 14, 2026 · Period: Jun 30, 2026
What a 13F does not show
Form 13F covers many reportable long U.S. equity positions at quarter end. It does not show every asset type, short positions, hedges, intraperiod trades, or current holdings after the report date. Use it as ownership context, not investment advice.
Read the 13F guide →Top reported holdings
Showing the top 50 positions by reported value. Source: SEC EDGAR Form 13F; period 2026-06-30; filed 2026-08-14.
| # | Ticker | Company | Shares | Value | Portfolio % | QoQ change |
|---|---|---|---|---|---|---|
| 1 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 2 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 3 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 4 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 5 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 6 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 7 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 8 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 9 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 10 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 11 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 12 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 13 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 14 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 15 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 16 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 17 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 18 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 19 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 20 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 21 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 22 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 23 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 24 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 25 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 26 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 27 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 28 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 29 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 30 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 31 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 32 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 33 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 34 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 35 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 36 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 37 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 38 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 39 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 40 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 41 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 42 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 43 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 44 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 45 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 46 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 47 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 48 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 49 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |
| 50 | -- | WESTERN DIGITAL CORP | 89.0M | $1.5B | 1.08% | -0.3% |