Superinvestor · SEC 13F
Stanley Druckenmiller portfolio — Q2 2026
Stanley Druckenmiller is founder of Duquesne Family Office. Duquesne Family Office reported $5.21B across 90 US-listed positions in its SEC Form 13F-HR for the quarter ended 2026-06-30, with Natera Inc the largest at $864.9M (16.6% 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. It excludes shorts, most bonds, non-US listings — and any personal accounts outside the firm's reported holdings. Source: SEC EDGAR Form 13F-HR.
Stanley Druckenmiller's top holdings — Q2 2026
| # | Holding | Value | % of reported | Δ shares vs Q1 2026 |
|---|---|---|---|---|
| 1 | Natera Inc | $864.9M | 16.6% | +122,700 |
| 2 | INSMED INC | $295.8M | 5.68% | +1,620,600 |
| 3 | Taiwan Semiconductor Manufacturing Company Ltd | $281.6M | 5.4% | +94,400 |
| 4 | ISHARES INC | $264.4M | 5.07% | 0 |
| 5 | AMAZON COM INC | $238.6M | 4.58% | +755,100 |
| 6 | STMICROELECTRONICS N V | $232.4M | 4.46% | +490,000 |
| 7 | INVESCO EXCHANGE TRADED FD T | $190.5M | 3.66% | +74,400 |
| 8 | YPF SOCIEDAD ANONIMA | $142.7M | 2.74% | −97,065 |
| 9 | CDW CORP | $139.8M | 2.68% | new |
| 10 | Bbb Foods Inc | $120.9M | 2.32% | −207,469 |
Top 10 of 90 stored positions by value — see the full Duquesne Family Office 13F table and filing history.
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.
What changed vs Q1 2026
Largest share-count changes between the two most recent stored filings. Value deltas include the quarter's price move.
- Natera Incadded · +$252.2M
- AMAZON COM INCadded · +$187.4M
- STMICROELECTRONICS N Vadded · +$142.1M
- CDW CORPadded · +$139.8M
- ALPHABET INCadded · +$120.2M
- ALCOA CORPreduced · −$89.4M
- Broadcom Incexited · −$60.6M
- Teva Pharmaceutical Industriesreduced · −$50.4M
- OPTION CARE HEALTH INCexited · −$50.3M
- WOODWARD INCreduced · −$47.1M
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.
Related on Flock
Frequently asked questions
What stocks does Stanley Druckenmiller own?
As disclosed in Duquesne Family Office's SEC 13F filing for the quarter ended 2026-06-30, the firm Stanley Druckenmiller founded reported 90 US-listed positions worth $5.21B, the largest being Natera Inc, INSMED INC, Taiwan Semiconductor Manufacturing Company Ltd. 13F positions are as of quarter-end, filed up to 45 days later — not current holdings. Not investment advice.
What is Stanley Druckenmiller's largest holding?
Natera Inc was the largest reported position in Duquesne Family Office's Q2 2026 13F, valued at $864.9M — 16.6% of the $5.21B in reported holdings. Source: SEC EDGAR Form 13F-HR, quarter ended 2026-06-30.
What did Stanley Druckenmiller buy last quarter?
Versus the prior stored quarter (Q1 2026), Duquesne Family Office's Q2 2026 13F shows share-count increases or newly reported positions including Natera Inc, AMAZON COM INC, STMICROELECTRONICS N V. The full quarter-over-quarter tables are on the Duquesne Family Office 13F page. Disclosure reporting, not investment advice.
Is this Stanley Druckenmiller's personal portfolio?
It is the portfolio Duquesne Family Office disclosed in its SEC Form 13F-HR — the firm's long US-listed equity positions as of quarter-end. Stanley Druckenmiller is founder of Duquesne Family Office. A 13F excludes shorts, most bonds, non-US listings, and any personal accounts outside the firm's reported holdings.
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 Duquesne Family Office runs through the quarter ended 2026-06-30 and re-checks SEC EDGAR daily for new filings.
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