SEC 13F filing
Two Sigma Investments 13F portfolio — Q2 2026
Two Sigma Investments reported $78.35B across its top 200 reported positions in its SEC Form 13F-HR for the quarter ended 2026-06-30, with WESTERN DIGITAL CORP the largest at $1.50B (1.91% of reported value). 13F positions are as of quarter-end and filed up to 45 days later — they are not current positions.
Definition
A 13F filing is a quarterly SEC disclosure required of institutional investment managers with at least $100M in US-listed equity assets. It lists the manager's long US equity positions as of quarter-end and must be filed within 45 days of that date. Source: SEC EDGAR Form 13F-HR.
Two Sigma Investments holdings — Q2 2026
Flock stores the top 200 positions by value from this filing; the complete information table is on SEC EDGAR.
| # | Holding | Ticker | Shares | Value | % of reported | Δ shares vs Q1 2026 |
|---|---|---|---|---|---|---|
| 1 | WESTERN DIGITAL CORP | WDC | 88,951,000 | $1.50B | 1.91% | −275,000 |
| 2 | AMAZON COM INC | AMZN | 5,848,287 | $1.39B | 1.78% | −606,280 |
| 3 | NVIDIA Corp | NVDA | 6,901,974 | $1.38B | 1.76% | −5,151,571 |
| 4 | APPLE INC | AAPL | 4,406,113 | $1.27B | 1.63% | −1,679,030 |
| 5 | Tesla Inc | TSLA | 3,000,296 | $1.26B | 1.61% | −115,803 |
| 6 | BERKSHIRE HATHAWAY INC DEL | — | 2,359,695 | $1.18B | 1.51% | +668,905 |
| 7 | Intuitive Surgical Inc | ISRG | 8,282,709 | $1.08B | 1.38% | −1,501,400 |
| 8 | JPMORGAN CHASE & CO | JPM | 3,001,216 | $982.4M | 1.25% | −522,372 |
| 9 | ASML HLDG NV | ASML | 491,805 | $978.4M | 1.25% | +101,855 |
| 10 | Advanced Micro Devices Inc | AMD | 1,661,119 | $965.0M | 1.23% | +278,115 |
| 11 | COSTCO WHOLESALE CORPORATION | COST | 1,014,031 | $948.6M | 1.21% | +122,938 |
| 12 | MASTERCARD INCORPORATED | MA | 1,845,239 | $947.7M | 1.21% | +162,241 |
| 13 | ALPHABET INC | GOOGL | 2,456,751 | $878.0M | 1.12% | −2,353,777 |
| 14 | CITIGROUP INC | C | 6,127,926 | $857.7M | 1.09% | +1,674,159 |
| 15 | State Street SPDR S&P 500 ETF Trust | SPY | 1,148,149 | $857.4M | 1.09% | +331,156 |
| 16 | BOSTON SCIENTIFIC CORP | BSX | 19,420,323 | $828.9M | 1.06% | +10,004,092 |
| 17 | GOLDMAN SACHS GROUP INC | GS | 806,845 | $816.0M | 1.04% | +394,417 |
| 18 | Lockheed Martin Corp | LMT | 1,578,736 | $804.3M | 1.03% | +229,564 |
| 19 | SCHWAB CHARLES CORP | SCHW | 8,501,355 | $784.4M | 1% | +3,089,456 |
| 20 | KIMBERLY-CLARK CORP | KMB | 7,115,332 | $781.0M | 1% | +1,917,006 |
| 21 | TJX COS INC NEW | TJX | 5,002,275 | $757.8M | 0.97% | −275,693 |
| 22 | ABBOTT LABORATORIES | ABT | 8,221,115 | $746.0M | 0.95% | +1,779,787 |
| 23 | T-MOBILE US INC | TMUS | 4,443,802 | $745.4M | 0.95% | +552,334 |
| 24 | ROBLOX Corp | RBLX | 13,469,049 | $732.4M | 0.93% | +1,316,581 |
| 25 | INTERACTIVE BROKERS GROUP IN | IBKR | 8,398,700 | $731.0M | 0.93% | +2,029 |
| 26 | MORGAN STANLEY | MS | 3,435,646 | $718.2M | 0.92% | −318,066 |
| 27 | MICROSOFT CORP | MSFT | 1,881,783 | $701.9M | 0.9% | +399,046 |
| 28 | PROGRESSIVE CORP | PGR | 3,036,004 | $663.2M | 0.85% | −491,804 |
| 29 | Cloudflare Inc | NET | 2,625,383 | $644.0M | 0.82% | −212,954 |
| 30 | MICRON TECHNOLOGY INC | MU | 549,473 | $634.3M | 0.81% | −1,767,271 |
| 31 | CHIPOTLE MEXICAN GRILL INC | CMG | 18,601,784 | $632.5M | 0.81% | +10,275,677 |
| 32 | WELLS FARGO & CO | WFC | 7,511,471 | $620.7M | 0.79% | +5,773,084 |
| 33 | BLOOM ENERGY CORP | BE | 2,042,432 | $618.2M | 0.79% | −1,564,406 |
| 34 | EQUINIX INC | EQIX | 576,841 | $601.3M | 0.77% | +124,574 |
| 35 | RTX CORPORATION | — | 3,123,437 | $592.6M | 0.76% | +1,167,254 |
| 36 | ILLINOIS TOOL WKS INC | ITW | 2,153,740 | $582.5M | 0.74% | +685,665 |
| 37 | BRISTOL-MYERS SQUIBB CO | BMY | 10,092,383 | $581.5M | 0.74% | −1,496,823 |
| 38 | SANDISK CORP | SNDK | 251,375 | $571.6M | 0.73% | −550,451 |
| 39 | INTUIT | INTU | 2,183,507 | $569.9M | 0.73% | +2,175,507 |
| 40 | ALNYLAM PHARMACEUTICALS INC | ALNY | 1,875,937 | $564.7M | 0.72% | −116,640 |
| 41 | Guardant Health Inc | GH | 3,742,701 | $561.5M | 0.72% | −486,830 |
| 42 | WASTE CONNECTIONS INC | WCN | 3,245,893 | $541.1M | 0.69% | −198,159 |
| 43 | CME GROUP INC | CME | 2,420,121 | $534.4M | 0.68% | +1,266,663 |
| 44 | ROSS STORES INC | ROST | 2,446,237 | $520.7M | 0.66% | −366,053 |
| 45 | Airbnb Inc | ABNB | 3,563,565 | $509.9M | 0.65% | +104,794 |
| 46 | MODERNA INC | MRNA | 7,242,430 | $507.2M | 0.65% | −1,964,574 |
| 47 | THE CIGNA GROUP | CI | 1,819,210 | $501.5M | 0.64% | +1,177,862 |
| 48 | AMERICAN AIRLINES GROUP INC | AAL | 27,439,583 | $495.8M | 0.63% | +13,259,465 |
| 49 | Ionis Pharmaceuticals Inc | IONS | 6,252,342 | $495.7M | 0.63% | +394,713 |
| 50 | AERCAP HOLDINGS NV | AER | 3,397,489 | $495.3M | 0.63% | −138,110 |
Showing the top 50 of 200 stored positions by value.
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.
Changes vs Q1 2026
Share-count changes between the Q1 2026 and Q2 2026 filings, matched position by position. Value deltas include the quarter's price move, so rankings key on share changes first. Two Sigma Investments's portfolio is larger than the positions tracked here (Flock stores the top 200 by value for its largest filings), so exits cannot be determined from the stored data and are not listed.
New positions
- SELECT SECTOR SPDR TR (CUSIP 81369Y506)+5,819,502 sh · +$309.1M
- SPACE EXPLORATION TECHN CORP+1,775,121 sh · +$303.3M
- Intercontinental Exchange Inc+2,029,234 sh · +$249.8M
- FORTIVE CORP+3,209,327 sh · +$196.1M
- SUPER MICRO COMPUTER INC (CUSIP 86800U500)+3,153,643 sh · +$163.9M
Largest increases
- Advanced Micro Devices Inc+278,115 sh · +$683.6M
- INTUIT+2,175,507 sh · +$566.4M
- WELLS FARGO & CO+5,773,084 sh · +$482.4M
- GOLDMAN SACHS GROUP INC+394,417 sh · +$467.1M
- ASML HLDG NV+101,855 sh · +$463.4M
- AMGEN INC+1,042,301 sh · +$378.3M
- TEXAS INSTRS INC+1,165,640 sh · +$371.2M
- BERKSHIRE HATHAWAY INC DEL+668,905 sh · +$370.5M
- CHIPOTLE MEXICAN GRILL INC+10,275,677 sh · +$365.9M
- CITIGROUP INC+1,674,159 sh · +$352.6M
Largest decreases
- NVIDIA Corp−5,151,571 sh · −$721.1M
- ADOBE INC−2,045,467 sh · −$539.1M
- Palantir Technologies Inc−2,654,149 sh · −$511.3M
- ALPHABET INC−2,353,777 sh · −$505.3M
- Broadcom Inc−1,713,123 sh · −$488.4M
- ARISTA NETWORKS INC−2,731,824 sh · −$278.1M
- APPLE INC−1,679,030 sh · −$269.4M
- ALBEMARLE CORP−878,351 sh · −$223.6M
- REGENERON PHARMACEUTICALS−156,112 sh · −$218.4M
- DELL TECHNOLOGIES INC−2,312,434 sh · −$173.5M
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.
Two Sigma Investments 13F filing history
| Quarter | Quarter end | Positions stored | Reported value |
|---|---|---|---|
| Q2 2026 | 2026-06-30 | 200 (top by value) | $78.35B |
| Q1 2026 | 2026-03-31 | 3724 | $123.93B |
| Q4 2025 | 2025-12-31 | 200 (top by value) | $37.34B |
| Q3 2025 | 2025-09-30 | 200 (top by value) | $38.47B |
| Q2 2025 | 2025-06-30 | 200 (top by value) | $33.44B |
Related on Flock
- All tracked 13F filers (browse every fund by name)
- Stocks the most 13F filers added last quarter
- The largest single 13F position increases
- What is a 13F filing? (how the disclosure works, and its limits)
- NSE shareholding patterns (the India equivalent: quarterly ownership filings)
Frequently asked questions
What is Two Sigma Investments's largest 13F holding?
WESTERN DIGITAL CORP was Two Sigma Investments's largest reported position for the quarter ended 2026-06-30, valued at $1.50B — 1.91% of the $78.35B in reported holdings. Figures come from the fund's SEC Form 13F-HR. Not investment advice.
How many positions did Two Sigma Investments report for Q2 2026?
Flock stores the top 200 positions by value from Two Sigma Investments's Q2 2026 13F filing, worth $78.35B combined. The full filing reports more positions; the source link on this page opens the complete information table on SEC EDGAR.
Which quarter does Two Sigma Investments's 13F data here cover?
Flock's coverage of Two Sigma Investments runs through the quarter ended 2026-06-30. SEC rules give institutional managers up to 45 days after quarter-end to file Form 13F-HR, so the disclosure became public after that date. Positions are as of the quarter-end, not current positions.
What did Two Sigma Investments add in Q2 2026?
Versus its prior stored quarter (Q1 2026), Two Sigma Investments's Q2 2026 13F shows share-count increases or newly reported positions including Advanced Micro Devices Inc, INTUIT, WELLS FARGO & CO. The quarter-over-quarter tables on this page list the largest changes with share and value deltas. Not investment advice.
What is a 13F filing?
Form 13F-HR is a quarterly SEC disclosure required of institutional investment managers with at least $100M in US-listed equity assets. It lists the manager's long US equity positions as of quarter-end and must be filed within 45 days of that date. It excludes shorts, most bonds, and non-US listings.
How current is this data?
13F positions are as of quarter-end and filed up to 45 days later, so they are never current positions. Flock's coverage of Two Sigma Investments runs through the quarter ended 2026-06-30. Flock re-checks SEC EDGAR daily and re-stamps this page when a new quarterly filing lands.
The Smart Money Digest
A free weekly email of notable disclosure activity — every line with its filing date and source link. No advice, just filings. Unsubscribe anytime.