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.
How has Two Sigma Investments's portfolio moved against the S&P 500?
Rebuilt from its quarterly filings, Two's disclosed portfolio is up 201% since September 2024. Over the stretch where we can compare, since December 2025, it is up 98% against 9% for the S&P 500. The latest filing, for the quarter ended 30 June 2026, lists 5,017 positions worth 132.9B USD.
Two's disclosed holdings, rebuilt at each filing
S&P 500, from Dec 2025, drawn from Two's level then
Long US stock only, held from one filing to the next: an illustrative read, not an audited return.
What does Two Sigma Investments hold?
WESTERN DIGITAL CORP is the largest disclosed position, at 1.1% or 1.5B USD. The 15 largest positions, listed below, make up 11% of the 132.9B USD portfolio.
SEC EDGAR Form 13F-HR, quarter ended 30 June 2026
| Position | Value | Weight | Shares | Last quarter |
|---|---|---|---|---|
| WESTERN DIGITAL CORPNo US ticker on file | 1.5B USD | 1.1% | 89.0M | Held |
| AMZNAMAZON COM INC | 1.4B USD | 1.0% | 5.7M | Held |
| NVDANVIDIA CORPORATION | 1.3B USD | 0.9% | 6.3M | Trimmed |
| AAPLAPPLE INC | 1.2B USD | 0.9% | 4.2M | Trimmed |
| TSLATESLA INC | 1.2B USD | 0.9% | 2.9M | Held |
| BRK.BBERKSHIRE HATHAWAY INC DEL | 1.1B USD | 0.8% | 2.3M | Added |
| JPMJPMORGAN CHASE & CO | 968.1M USD | 0.7% | 3.0M | Held |
| MAMASTERCARD INCORPORATED | 945.6M USD | 0.7% | 1.8M | Held |
| COSTCOSTCO WHOLESALE CORPORATION | 941.3M USD | 0.7% | 1.0M | Held |
| ASMLASML HLDG NV | 918.1M USD | 0.7% | 461.5K | Held |
| AMDADVANCED MICRO DEVICES INC | 880.3M USD | 0.6% | 1.5M | Held |
| CCITIGROUP INC | 831.1M USD | 0.6% | 5.9M | Added |
| BSXBOSTON SCIENTIFIC CORP | 826.2M USD | 0.6% | 19.4M | Added |
| GOOGLALPHABET INC | 802.9M USD | 0.6% | 2.2M | Trimmed |
| LMTLOCKHEED MARTIN CORP | 799.8M USD | 0.6% | 1.6M | Held |
What did Two Sigma Investments change last quarter?
In the quarter ended 30 June 2026 Two Sigma Investments opened 1,084 positions, the largest INTUIT (INTU) at 564.2M USD, then SELECT SECTOR SPDR TR and SPACE EXPLORATION TECHN CORP. It added to 1,404, trimmed 1,145 and sold out of 613, against the filing before.
Against the previous quarter's 13F, largest first within each kind; the 20 largest of each kind are listed
| Position | Change | Shares moved | Value after |
|---|---|---|---|
| INTUINTUIT | New buy | +2.2M | 564.2M USD |
| XLESELECT SECTOR SPDR TR | New buy | +5.8M | 309.1M USD |
| SPCXSPACE EXPLORATION TECHN CORP | New buy | +1.8M | 303.3M USD |
| ICEINTERCONTINENTAL EXCHANGE IN | New buy | +2.0M | 249.8M USD |
| FTVFORTIVE CORP | New buy | +3.2M | 196.1M USD |
| SUPER MICRO COMPUTER INCNo US ticker on file | New buy | +3.2M | 163.9M USD |
| ALPHABET INCNo US ticker on file | New buy | +3.1M | 155.0M USD |
| CMCSACOMCAST CORP NEW | New buy | +4.9M | 120.3M USD |
| NXPINXP SEMICONDUCTORS N V | New buy | +343.1K | 96.4M USD |
| GAMESTOP CORPNo US ticker on file | New buy | +88.0M | 89.1M USD |
| LYBLYONDELLBASELL INDUSTRIES NV | New buy | +1.6M | 84.7M USD |
| ASNDASCENDIS PHARMA A/S | New buy | +305.8K | 81.6M USD |
| DDDUPONT DE NEMOURS INC | New buy | +582.1K | 79.0M USD |
| AVLVAMERICAN CENTY ETF TR | New buy | +838.3K | 76.5M USD |
| FIRSTENERGY CORPNo US ticker on file | New buy | +64.2M | 71.3M USD |
| VLUEISHARES TR | New buy | +347.9K | 69.5M USD |
| ALPHABET INCNo US ticker on file | New buy | +1.2M | 60.8M USD |
| TDGTRANSDIGM GROUP INC | New buy | +44.9K | 59.8M USD |
| AKAMAI TECHNOLOGIES INCNo US ticker on file | New buy | +38.0M | 55.4M USD |
| TGBTREKOR METALS LTD | New buy | +7.9M | 54.3M USD |
| BRK.BBERKSHIRE HATHAWAY INC DEL | Added | +652.8K | 1.1B USD |
| CCITIGROUP INC | Added | +1.6M | 831.1M USD |
| BSXBOSTON SCIENTIFIC CORP | Added | +9.9M | 826.2M USD |
| ISRGINTUITIVE SURGICAL INC | Added | +573.8K | 787.1M USD |
| SCHWSCHWAB CHARLES CORP | Added | +3.1M | 777.4M USD |
| KMBKIMBERLY-CLARK CORP | Added | +1.9M | 774.4M USD |
| GSGOLDMAN SACHS GROUP INC | Added | +387.8K | 762.1M USD |
| ABTABBOTT LABORATORIES | Added | +1.7M | 737.4M USD |
| MSFTMICROSOFT CORP | Added | +448.4K | 682.4M USD |
| CMGCHIPOTLE MEXICAN GRILL INC | Added | +10.3M | 628.5M USD |
| EQIXEQUINIX INC | Added | +124.6K | 601.3M USD |
| WFCWELLS FARGO & CO | Added | +5.7M | 600.5M USD |
| RTXRTX CORPORATION | Added | +1.2M | 589.7M USD |
| ITWILLINOIS TOOL WKS INC | Added | +685.7K | 582.5M USD |
| CMECME GROUP INC | Added | +1.3M | 534.4M USD |
| CITHE CIGNA GROUP | Added | +1.2M | 499.8M USD |
| AALAMERICAN AIRLINES GROUP INC | Added | +13.1M | 492.2M USD |
| DOWDOW HLDGS INC | Added | +13.4M | 489.0M USD |
| RSGREPUBLIC SVCS INC | Added | +571.2K | 485.9M USD |
| BLKBLACKROCK INC | Added | +292.3K | 466.7M USD |
| NVDANVIDIA CORPORATION | Trimmed | −4.9M | 1.3B USD |
| AAPLAPPLE INC | Trimmed | −1.8M | 1.2B USD |
| GOOGLALPHABET INC | Trimmed | −2.2M | 802.9M USD |
| MUMICRON TECHNOLOGY INC | Trimmed | −1.8M | 617.7M USD |
| BEBLOOM ENERGY CORP | Trimmed | −1.5M | 610.4M USD |
| SNDKSANDISK CORP | Trimmed | −521.1K | 549.5M USD |
| NBISNEBIUS GROUP N.V. | Trimmed | −1.3M | 415.6M USD |
| PLTRPALANTIR TECHNOLOGIES INC | Trimmed | −2.9M | 413.5M USD |
| NBIXNEUROCRINE BIOSCIENCES INC | Trimmed | −984.3K | 349.9M USD |
| WMWASTE MGMT INC DEL | Trimmed | −705.4K | 297.3M USD |
| DELLDELL TECHNOLOGIES INC | Trimmed | −2.4M | 282.7M USD |
| QQQINVESCO QQQ TR | Trimmed | −332.3K | 237.9M USD |
| TERTERADYNE INC | Trimmed | −370.3K | 227.0M USD |
| SESEA LTD | Trimmed | −957.8K | 224.8M USD |
| ADBEADOBE INC | Trimmed | −2.0M | 224.1M USD |
| AVGOBROADCOM INC | Trimmed | −1.7M | 211.7M USD |
| LITELUMENTUM HLDGS INC | Trimmed | −156.6K | 206.1M USD |
| ALBALBEMARLE CORP | Trimmed | −860.2K | 197.2M USD |
| TEAMATLASSIAN CORPORATION | Trimmed | −2.2M | 194.1M USD |
| MSCIMSCI INC | Trimmed | −251.5K | 185.0M USD |
| HONHONEYWELL INTL INC | Sold out | −1.7M | was 392.7M USD |
| BLOOM ENERGY CORPNo US ticker on file | Sold out | −27.0M | was 194.2M USD |
| XLKSELECT SECTOR SPDR TR | Sold out | −1.3M | was 172.1M USD |
| XLRESELECT SECTOR SPDR TR | Sold out | −2.7M | was 111.5M USD |
| CENTERPOINT ENERGY INCNo US ticker on file | Sold out | −80.0M | was 94.7M USD |
| IYRISHARES TR | Sold out | −984.2K | was 93.1M USD |
| VENTAS RLTY LTD PARTNERSHIPNo US ticker on file | Sold out | −57.0M | was 84.7M USD |
| CHTRCHARTER COMMUNICATIONS INC | Sold out | −302.2K | was 65.2M USD |
| JAZZ INVESTMENTS I LTDNo US ticker on file | Sold out | −53.1M | was 64.4M USD |
| IBNICICI BANK LIMITED | Sold out | −2.5M | was 64.4M USD |
| IWMISHARES TR | Sold out | −251.9K | was 62.5M USD |
| ECLECOLAB INC | Sold out | −219.8K | was 58.5M USD |
| CNX RES CORPNo US ticker on file | Sold out | −18.6M | was 56.7M USD |
| ASNDASCENDIS PHARMA A/S | Sold out | −220.3K | was 50.4M USD |
| TGBTASEKO MINES LTD | Sold out | −7.8M | was 50.2M USD |
| MGCVANGUARD WORLD FD | Sold out | −200.2K | was 47.3M USD |
| TRITHOMSON REUTERS CORP | Sold out | −408.2K | was 36.7M USD |
| SMHVANECK ETF TRUST | Sold out | −92.3K | was 35.4M USD |
| VVVANGUARD INDEX FDS | Sold out | −117.8K | was 35.2M USD |
| GLDDGREAT LAKES DREDGE & DOCK CO | Sold out | −2.0M | was 33.8M USD |
Rows sharing a company name are separate securities of the same issuer — different share classes or option positions, as filed.
Where is Two Sigma Investments's money by sector?
Technology (20%) and financial services (14%) hold 34% of disclosed value, across 5,017 positions; healthcare (11%) and industrials (11%) come next.
By reported value at quarter end; sectors from our reference list, "Other" where none matched
What do people ask about Two Sigma Investments?
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
- SEC EDGAR Form 13F-HR, quarterly, up to 45 days delayed. Filings are public records. Ticker mapping via SEC public files and OpenFIGI.
- Finazon prior-day close, indicative (IEX-derived, not the official close), some closes dollar-rounded at the source