A continuously maintained graph of U.S. family offices: identity, team, observed investments, public holdings, relationships and dated signals of change. Facts, inferences and estimates are labelled as such, with the source and the date, on every row. Unknown is printed as unknown.

Family office profile

Duquesne Family Office LLC

40 West 57th Street, 25th Floor, New York, NY 10019Single family office (confirmed)identity confidence 90%Top 500 by research priority

Why this class: the filer names itself a family office on its own SEC Form 13F filings, is on no adviser roster, and independent financial press identifies it as Stanley Druckenmiller's family office.

Verified Sep 13, 2026 (5 days ago)
Last observed Sep 14, 2026 · 100 observations · 5 sources
5 people · 12 investments · 68 public positions · 392 events
Identity
90
high
Data depth
80
high
Freshness
100
high
Active deployment
100
high
Direct investing
85
high
External managers
0
low
Private markets
70
high
Sponsor-friendly
60
high
Real estate
0
low
Co-investment
100
high
Contactability
55
elevated
Mandate confidence
90
high

Twelve separate dimensions, each 0 to 100 from listed components. There is no single family office score; the components are in the evidence section.

Overview
Profile completeness 88% (high value, high value deep; the most valuable missing fact is fund relationships)
identityclassificationwealth origincapital-scale evidencepeoplecontactsmandatedirect investmentsfund relationshipsco-investorssponsor relationshipsreal estatepublic holdingsrecent eventsprovenancefreshness
Classification
Single family office (confirmed)
Description
Investment firm of Stanley F. Druckenmiller
Headquarters
40 West 57th Street, 25th Floor, New York, NY 10019
Office address
unknown
Business phone
unknown
Website
unknown
Year established
unknown
Assets under management
unknown
Foundation assets (IRS)
$4.7B across 2 related private foundations, per the IRS master file; the foundation's assets, not the office'sFact
Capital scale
Reported office AUM: unknown. 13F disclosed value $3.4B. Related foundation assets $4.7B. These are different facts and are never added together.
Form 13F
$3.4B across 70 positions, quarter ended Mar 31, 2026. Long 13(f) securities only; never the whole portfolio.Fact
Classification history
  • Sep 12, 2026Single family office (confirmed) 90%the filer names itself a family office on its own SEC Form 13F filings, is on no adviser roster, and independent financial press identifies it as Stanley Druckenmiller's family officeFactverifiedinstitutionalinvestor.com“Stan Druckenmiller Overhauls His Family Office's U.S. Stock Portfolio”
  • Sep 12, 2026Single family office (probable) 70%unregistered 13F filer named as a family office: a multi-family office would have to registerInference
Family and wealth origin
Family served
Stanley F. Druckenmiller (and family)
Source of wealth
Hedge fund management: Duquesne Capital (founded 1981) and Soros Quantum Fund lead PM 1988 to 2000
Operating company origin
unknown
Team
PersonTitleResponsibilityBusiness contactSource
Sue MengPartner and Managing Director; General CounselDirect investments · investment decisions
email: meng@duquesne.com (published by the subject)
phone: 212-830-6500 (published by the subject, May 15, 2026)
pdsoros.org Fact
Stanley F Druckenmiller familySole Managing Member, Duquesne Holding Co LLC (founder)Family principal · investment decisionsnone on recordsec.gov Fact
Kevin WarshPartner and advisorInvestment committee · investment decisionsnone on recordcnbc.com Fact
Sue MengGeneral CounselOperations and finance
email: meng@duquesne.com (published by the subject)
phone: 212-830-6500 (published by the subject, May 15, 2026)
sec.gov Fact
Michael BuckleyInvestment professional (title not stated)Public markets · investment decisionsnone on recordhedgefundalpha.com Fact
Office contact points
Office address: 40 West 57th Street, 25th Floor, New York, NY, 10019 (published by the subject) sec.gov
Investment mandate

1 investments on the record; last deal 2026-07-31. stated: public_equity,macro

Stated (their words, cited)
Asset classes
public equity, macro Inference institutionalinvestor.com
“Duquesne Family Office Cuts Back — Then Loads Up on New Bets”
Observed (from the investment record)
States
none Fact
Control
minority (1) Fact
Sectors
none Fact
Subsectors
none Fact
Co investors
Bristol Myers Squibb (1), Eli Lilly (1), Catalio Capital Management (1), Wasatch Group (1) Fact
Asset classes
none Fact
Direct vs fund
Fund: 0 · Direct: 1 · Real estate: 0 Fact
Sponsors backed
none Fact
Investment count
1 Fact
Investment kinds
round participation (1) Fact
First and last deal
Last: 2026-07-31 · First: 2026-07-31 Fact
Lead vs participant
participant (1) Fact
Disclosed check sizes
Max: unknown · Min: unknown · Count: 0 Fact
amounts are only what a source disclosed; never backsolved from a round
Inferred (regulatory shape and team)
Public equity book
$3.4B Inference
13F table value, quarter ended 2026-03-31; long 13(f) securities only
Invests directly
Private investment strategy backing disruptive high-growth technology and life sciences companies globally
Allocates to managers
unknown
Asset classes
Public equities (13F), private venture/growth, negotiated block stakes, pooled hedge fund vehicles
Sectors
Technology and life sciences (private); biotech thesis tied to AI
Geography
Global (US, Germany, Turkey, UK/Nevada deals)
Check size
unknown
Direct investments
DateCompanyKindSectorRoleAmountWithSource
Aug 11, 2026Epicrispr BiotechnologiesRound participationEpigenetic medicines (FSHD)participant · minorityunknownOctagon Capital (co investor), Janus Henderson Investors (co investor), Fidelity Management & Research Company (co investor), Cormorant Asset Management (co investor), Sanofi Ventures (co investor), abrdn (co investor), Angelini Ventures (co investor), Readout Capital (co investor)epicrispr.com Fact
“Oversubscribed financing co-led by Octagon Capital and Janus Henderson Investors, with participation from Fidelity Management & Research Com”
Jul 31, 2026Ratio TherapeuticsRound participationRadiopharmaceuticals / oncologyparticipant · minority$70.0MBristol Myers Squibb (co investor), Catalio Capital Management (co investor), Eli Lilly (co investor), Wasatch Group (co investor), Eli Lilly and Company (co investor)prnewswire.com Fact
“The financing included strong participation from existing investors Duquesne Family Office and Bristol Myers Squibb, along with new investor”
Jun 10, 2026SonoTheraRound participationNonviral genetic medicinesparticipant · minorityunknownVida Ventures (co investor), ARK Invest (co investor), CureDuchenne Ventures (co investor), Leaps by Bayer (co investor), Otsuka Pharmaceutical (co investor), ARCH Venture Partners (co investor), Alexandria Venture Investments (co investor), Illumina Ventures (co investor), Johnson & Johnson Innovation (co investor), RA Capital (co investor), Vertex Ventures HC (co investor), Vivo Capital (co investor)sonothera.com Fact
“existing investors ARCH Venture Partners, Alexandria Venture Investments, Duquesne Family Office, Illumina Ventures,”
Dec 11, 2025MyOmeRound participationGenomics / clinical risk modelingparticipant · minorityunknownIllumina (co investor), Sequoia Capital (co investor), Natera (co investor)prnewswire.com Fact
“Sequoia Capital, The Duquesne Family Office, and others also participated in the financing.”
Oct 30, 2025Q.ANT GmbHRound participationPhotonic computing / AI semiconductorsparticipant · minorityunknownCherry Ventures (co investor), UVC Partners (co investor), imec.xpand (co investor), L-Bank (co investor), Verve Ventures (co investor), Grazia Equity (co investor), EXF Alpha of Venionaire Capital (co investor), LEA Partners (co investor), Onsight Ventures (co investor), TRUMPF (co investor)qant.com Fact
“today announced the second closing of its Series A funding round securing an additional investment from Duquesne Family Office LLC,”
Aug 27, 2025Guardian Metal Resources plcDirect investmentTungsten development (Nevada)lead · minorityunknownSeller: Power Metal Resources plc (sponsor)marketscreener.com Fact
“Juggernaut Fund, L.P., a fund managed by Duquesne Family Office LLC completed the acquisition of 14.75% stake in Guardian Metal Resources PL”
Sep 13, 2024LedgebrookVentureInsurtech MGAlead · minority$17.0MBrand Foundry Ventures (co investor), American Family Ventures (co investor), Stephens Group, LLC (co investor)prnewswire.com Fact
“This opportunistic raise introduces two esteemed Family Offices to the Ledgebrook cap table: Duquesne (who led the round) and The Stephens G”
Oct 1, 2021VavaCarsVentureUsed car marketplace (Turkey, Pakistan)lead · minorityunknownVitol (co investor)globalprivatecapital.org Fact
“Duquesne Family Office and Vitol led a USD50m Series B for VavaCars , a Turkey-based auto resale marketplace.”
Fund and manager relationships

Funds held by the family's private foundation, from its Form 990-PF: the foundation reports each fund by name with its fair value. They are the foundation's holdings, never an amount the office itself committed.

FundManagerHeld throughFoundation's fair valuePeriodBasis
NO Margin Fund LPNO MarginDruckenmiller Foundation$2.3BNov 30, 2024Inference foundation tied to the office apps.irs.gov
Public stakes and holdings
Stakes the office filed (Schedule 13D, 13G, Section 16)

From EDGAR's index of the office's own filings. A 13D is a stake of 5% or more held with intent, a 13G one held passively, a Form 3, 4 or 5 the office as an insider of the issuer. The size of the stake is inside each filing and is not shown here.

First filedIssuerFiled asFilings
Jan 28, 2026BBB FOODS INCSchedule 13G (passive)2x SCHEDULE 13G on BBB FOODS INC (TBBB) between 2026-01-28 and 2026-07-29 sec.gov
May 9, 2024DAKTRONICS INC /SD/Schedule 13G (passive)2x SC 13G, 1x SCHEDULE 13G/A on DAKTRONICS INC /SD/ (DAKT) between 2024-05-09 and 2025-11-04 sec.gov
Feb 13, 2019New Fortress Energy LLCSchedule 13G (passive)4x SC 13G on New Fortress Energy LLC (NFE) between 2019-02-13 and 2019-08-20 sec.gov
Oct 16, 2015Pure Storage, Inc.Schedule 13G (passive)2x SC 13G, 1x SC 13G/A on Pure Storage, Inc. (PSTG) between 2015-10-16 and 2017-02-14 sec.gov
Form 13F holdings

Top 40 positions of 70 for the quarter ended Mar 31, 2026; $3.1B shown of $3.4B reported. Long 13(f) securities only. Never presented as the whole portfolio.

IssuerClassValueSharesWeight
Natera IncCOM$613M3,063,60618.1%
Insmed IncCOM PAR $.01$189M1,154,0905.6%
Taiwan Semiconductor ManufacSPONSORED ADS$167M495,2805.0%
Ishares Inc CallMSCI BRAZIL ETF$162M4,228,0004.8%
Invesco Exchange Traded Fd T CallS&P500 EQL WGT$158M821,0004.7%
Ypf Sociedad AnonimaSPON ADR CL D$150M3,235,9624.4%
Ishares IncMSCI BRAZIL ETF$132M3,436,1703.9%
Bbb Foods IncCL A COM$110M3,109,2023.3%
Alcoa CorpCOM$99.1M1,493,3902.9%
Newamsterdam Pharma CompanyORDINARY SHARES$98.3M3,070,1462.9%
Sea LtdSPONSORD ADS$91.1M1,099,9052.7%
Stmicroelectronics N VNY REGISTRY$90.3M2,612,8802.7%
Woodward IncCOM$75.6M211,3552.2%
Teva Pharmaceutical Inds LtdSPONSORED ADS$71.6M2,377,2852.1%
Roku IncCOM CL A$71.0M750,1902.1%
Broadcom IncCOM$60.6M195,9551.8%
State Str Spdr S&P 500 Etf T CallTR UNIT$58.5M90,0001.7%
Coupang IncCL A$50.4M2,667,4851.5%
Option Care Health IncCOM NEW$50.3M1,868,5501.5%
Amazon Com Inc CallCOM$41.7M200,0001.2%
Crh PlcORD$39.7M377,5551.2%
Figure Technology SolutioCOM CL A$39.1M1,150,4151.2%
Global X FdsGB MSCI AR ETF$36.2M387,4001.1%
Caris Life Sciences IncCOM$33.9M1,894,4501.0%
Restaurant Brands Intl IncCOM$33.6M454,4351.0%
Revolution Medicines IncCOM$30.7M315,8600.9%
Lattice Semiconductor CorpCOM$30.0M323,1350.9%
Sandisk CorpCOM$24.2M38,1550.7%
United Airls Hldgs IncCOM$24.2M262,4950.7%
Humana IncCOM$23.8M137,5050.7%
WabtecCOM$23.7M94,8950.7%
Twilio IncCL A$22.9M181,7600.7%
Jabil IncCOM$21.8M82,2000.6%
Southern Copper CorpCOM$21.0M121,8430.6%
Ishares S&P Gsci Commodity-UNIT BEN INT$20.7M643,0000.6%
Linde PlcSHS$20.4M41,2000.6%
Seagate Technology Hldngs PlORD SHS$19.9M50,7000.6%
Ishares Tr CallRUSSELL 2000 ETF$19.6M79,0000.6%
Cleveland-Cliffs Inc NewCOM$19.5M2,313,4550.6%
Nuvation Bio IncCOM CL A$19.5M4,539,8000.6%
Changes between the last two quarters
  • Mar 31, 2026 Duquesne Family Office LLC opened a $20,425,000 position in Linde Plc (41,200 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC reduced Restaurant Brands Intl Inc 1,209,000 -> 454,435 shares ($82,490,000 -> $33,583,000) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC reduced Purecycle Technologies Inc 2,878,434 -> 963,189 shares ($24,726,000 -> $4,999,000) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC reduced Mercadolibre Inc 47,149 -> 2,766 shares ($94,970,000 -> $4,782,000) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $14,498,000 position in Qnity Electronics Inc (125,655 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $30,717,000 position in Revolution Medicines Inc (315,860 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $4,893,000 position in Lumentum Hldgs Inc (6,963 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $14,714,000 position in Olema Pharmaceuticals Inc (986,827 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $10,588,000 position in Lyondellbasell Industries Nv (131,435 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $19,476,000 position in Nuvation Bio Inc (4,539,800 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC opened a $7,905,000 position in Micron Technology Inc (23,400 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC reduced Lattice Semiconductor Corp 925,970 -> 323,135 shares ($68,133,000 -> $29,974,000) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited American Airls Group Inc (was $9,808,000, 639,785 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Alphabet Inc (was $120,505,000, 385,000 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Aeva Technologies Inc (was $24,234,000, 1,824,862 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Wolfspeed Inc (was $3,254,000, 186,900 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Flutter Entmt Plc (was $24,782,000, 115,245 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Zillow Group Inc (was $13,142,000, 192,640 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Select Sector Spdr Tr (was $300,994,000, 5,495,600 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Rh (was $15,801,000, 88,200 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Progyny Inc (was $7,579,000, 295,115 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Philip Morris Intl Inc (was $10,811,000, 67,400 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited On Semiconductor Corp (was $29,038,000, 536,260 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Ishares Tr (was $49,376,000, 902,500 shares) sec.gov
  • Mar 31, 2026 Duquesne Family Office LLC exited Invesco Exchange Traded Fd T (was $224,877,000, 1,173,925 shares) sec.gov
Real estate
No documented real estate ownership link. A property is attributed to an office only through a documented control relationship, never from a surname.
Co-investors
CounterpartyKindShared dealsFirst, lastExamplesSource
Cormorant Asset Managementorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Sanofi Venturesorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Janus Henderson Investorsorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Octagon Capitalorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Angelini Venturesorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Readout Capitalorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Fidelity Management & Research Companyorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
abrdnorganisation1Aug 11, 2026Epicrispr Biotechnologiesepicrispr.com
Eli Lilly and Companyorganisation1Jul 31, 2026Ratio Therapeuticsprnewswire.com
Bristol Myers Squibborganisation1Jul 31, 2026Ratio Therapeuticsprnewswire.com
Catalio Capital Managementorganisation1Jul 31, 2026Ratio Therapeuticsprnewswire.com
Eli Lillyorganisation1Jul 31, 2026Ratio Therapeuticsprnewswire.com
Wasatch Groupfamily office1Jul 31, 2026Ratio Therapeuticsprnewswire.com
ARK Investorganisation1Jun 10, 2026SonoTherasonothera.com
ARCH Venture Partnersorganisation1Jun 10, 2026SonoTherasonothera.com
Otsuka Pharmaceuticalorganisation1Jun 10, 2026SonoTherasonothera.com
Alexandria Venture Investmentsorganisation1Jun 10, 2026SonoTherasonothera.com
RA Capitalorganisation1Jun 10, 2026SonoTherasonothera.com
Vertex Ventures HCorganisation1Jun 10, 2026SonoTherasonothera.com
CureDuchenne Venturesorganisation1Jun 10, 2026SonoTherasonothera.com
Vida Venturesorganisation1Jun 10, 2026SonoTherasonothera.com
Leaps by Bayerorganisation1Jun 10, 2026SonoTherasonothera.com
Johnson & Johnson Innovationorganisation1Jun 10, 2026SonoTherasonothera.com
Vivo Capitalorganisation1Jun 10, 2026SonoTherasonothera.com
Illumina Venturesorganisation1Jun 10, 2026SonoTherasonothera.com
Nateraorganisation1Dec 11, 2025MyOmeprnewswire.com
Illuminaorganisation1Dec 11, 2025MyOmeprnewswire.com
Sequoia Capitalorganisation1Dec 11, 2025MyOmeprnewswire.com
Cherry Venturesorganisation1Oct 30, 2025Q.ANT GmbHqant.com
L-Bankorganisation1Oct 30, 2025Q.ANT GmbHqant.com
Verve Venturesorganisation1Oct 30, 2025Q.ANT GmbHqant.com
TRUMPForganisation1Oct 30, 2025Q.ANT GmbHqant.com
EXF Alpha of Venionaire Capitalorganisation1Oct 30, 2025Q.ANT GmbHqant.com
UVC Partnersorganisation1Oct 30, 2025Q.ANT GmbHqant.com
Onsight Venturesorganisation1Oct 30, 2025Q.ANT GmbHqant.com
LEA Partnersorganisation1Oct 30, 2025Q.ANT GmbHqant.com
Grazia Equityorganisation1Oct 30, 2025Q.ANT GmbHqant.com
imec.xpandorganisation1Oct 30, 2025Q.ANT GmbHqant.com
Seller: Power Metal Resources plcindependent sponsor (sponsor)1Aug 27, 2025Guardian Metal Resources plcmarketscreener.com
Stephens Group, LLCfamily office1Sep 13, 2024Ledgebrookprnewswire.com
Independent sponsor relationships
Signals and timeline

Most significant first: what kind of change it is, its size, whose change it is, and how recent. 12 events. 13F position changes are under Public stakes and holdings.

  • Sep 11, 2026Classification changedDuquesne Family Office LLC: PROBABLE_SFO -> CONFIRMED_SFO (the filer names itself a family office on its own SEC Form 13F filings, is on no adviser roster, and independent financial press identifies it as Stanley Druckenmiller's family office)ClassificationFactinstitutionalinvestor.com
  • Sep 11, 2026Office discoveredDuquesne Family Office LLC files Form 13F (name, $4,494,450 in 62 positions)DiscoveryInferencesec.gov
  • Aug 11, 2026Direct investmentDuquesne Family Office LLC invested in Epicrispr BiotechnologiesDirect investmentsFactepicrispr.com
  • Jul 31, 2026Direct investmentDuquesne Family Office LLC invested in Ratio TherapeuticsDirect investmentsFactprnewswire.com
  • Jun 10, 2026Direct investmentDuquesne Family Office LLC invested in SonoTheraDirect investmentsFactsonothera.com
  • Apr 23, 2026Succession eventPartner Kevin Warsh, Fed Chair nominee, pledges to divest Duquesne-affiliated investmentsPeopleFactcnbc.com
  • Dec 16, 2025New investment vehicleDuquesne obtains pro rata right of first refusal in Guardian Metal ahead of its planned NYSE ADS IPOVehiclesFactsec.gov
  • Dec 11, 2025Direct investmentDuquesne Family Office LLC invested in MyOmeDirect investmentsFactprnewswire.com
  • Oct 30, 2025Direct investmentDuquesne Family Office LLC invested in Q.ANT GmbHDirect investmentsFactqant.com
  • Aug 27, 2025Direct investmentDuquesne Family Office LLC invested in Guardian Metal Resources plcDirect investmentsFactmarketscreener.com
  • Sep 13, 2024Direct investmentDuquesne Family Office LLC invested in LedgebrookDirect investmentsFactprnewswire.com
  • Oct 1, 2021Direct investmentDuquesne Family Office LLC invested in VavaCarsDirect investmentsFactglobalprivatecapital.org
Sources and evidence

Every observation behind this profile: the value, when it was effective, the source, the quote where there is one, and whether it is a fact, an inference or an estimate. 100 shown.

Score components
Freshness
+100 days since the newest source-dated fact or analyst verification (4 days)
Contactability
+15 named decision-makers (Sue Meng (Partner and Managing Director; General Counsel))
+20 verified business emails (2)
+20 verified business phones (2)
Data confidence
+10 description
+10 stated mandate
+10 people
+15 investments
+5 public holdings
+10 regulatory record
+20 independent sources (5 sources)
Active deployment
+75 dated private investments in last 24 months (Guardian Metal Resources plc (2025-08-27); SonoThera (2026-06-10); Ratio Therapeutics (2026-07-31); Q.ANT GmbH (2025-10-30))
+25 a dated private investment in last 12 months (2026-08-11)
Exists confidence
+50 regulatory identifier (CIK, CRD or EIN)
+30 independent sources (5 sources)
+30 analyst-verified
Research priority
+18 capital scale (largest of 13F, RAUM, AUM, foundation assets) ($4,662,210,554)
+15 single family or family investment company
+15 direct investments on record
+10 deployed in last 24 months
+10 independent sponsor relationship
+2 no website known (research would find one)
+0 rank (1)
Mandate confidence
+70 mandate supported by observed investments
+20 stated mandate on the record
Identity confidence
+90 classification (CONFIRMED_SFO (the filer names itself a family office on its own SEC Form 13F filings, is on no adviser roster, and independent financial press identifies it as Stanley Druckenmiller's family office))
Real estate propensity
no components; scored 0
Co investment propensity
+80 co-investors on the record (L-Bank; Onsight Ventures; Fidelity Management & Research Company; TRUMPF; ARCH Venture Partners)
+20 participant in syndicated rounds
Family identity confidence
+60 wealth origin or operating company on the record
+40 family named (Stanley F. Druckenmiller (and family))
+20 family principal on staff
Private markets propensity
+60 private markets investments observed
+10 stated venture
Current activity confidence
+50 dated private investment in 24 months
+25 filed a 13F for a recent quarter (the entity operates; not deployment)
+25 a source-dated fact within 12 months (5 days)
External manager propensity
no components; scored 0
Direct investment propensity
+70 observed direct investments (12 on the record)
+15 direct investment professional on staff
Independent sponsor propensity
+60 sponsor relationships on the record (Seller: Power Metal Resources plc; Seller: Power Metal Resources plc)
FactValueEffectiveSourceClass
Asset classesPublic equities (13F), private venture/growth, negotiated block stakes, pooled hedge fund vehicles
“It invests across public and private markets, and its quarterly disclosures of US-listed holdings have recently run at roughly $4 billion”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) familyofficehub.ioInference
Asset classespublic_equity,macro
“Duquesne Family Office Cuts Back — Then Loads Up on New Bets”
Sep 11, 2026DFX analyst research (General-assisted, every claim URL-cited) institutionalinvestor.comInference
Board participationTakes board and advisory board observer seats (Ledgebrook, Soley Therapeutics, Q.ANT) via Sue Meng
“Ms. Meng serves on the boards of Ledgebrook, an insuretech company, and Soley Therapeutics, a drug discovery company, alongside fellow investors and board members Doug Leone and Jim Breyer.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) pdsoros.orgFact
Co invest behaviorLeads or co-leads rounds as well as participates (led Ledgebrook Series B, co-led Ratio Series A extension and VavaCars Series B)
“This opportunistic raise introduces two esteemed Family Offices to the Ledgebrook cap table: Duquesne (who led the round) and The Stephens Group”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) prnewswire.comInference
Decision rightsDruckenmiller controls the office as sole managing member of the holding company
“Sole Managing Member of Duquesne Holding Co LLC, the sole Managing Member of Duquesne Family Office LLC, the General Partner of the Issuer”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govInference
DescriptionInvestment firm of Stanley F. Druckenmiller
“Duquesne Family Office is the investment firm of Stanley F. Druckenmiller.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) qant.comFact
DescriptionStanley Druckenmiller's single-family office (New York); a 13F filer with a concentrated, actively traded public equity book. No public website.
“Duquesne Family Office Cuts Back — Then Loads Up on New Bets”
Sep 11, 2026DFX analyst research (General-assisted, every claim URL-cited) institutionalinvestor.comInference
Edgar entity typeotherSep 12, 2026SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Edgar forms13F-HR,13F-HR/A,N-PX,SC 13G,SC 13G/A,SCHEDULE 13G,SCHEDULE 13G/ASep 12, 2026SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Family servedStanley F. Druckenmiller (and family)
“Sole Managing Member of Duquesne Holding Co LLC, the sole Managing Member of Duquesne Family Office LLC, the General Partner of the Issuer”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
Family servedStanley Druckenmiller
“Stan Druckenmiller Overhauls His Family Office's U.S. Stock Portfolio”
Sep 11, 2026DFX analyst research (General-assisted, every claim URL-cited) institutionalinvestor.comFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address40 West 57th Street, 25th Floor, New York, NY, 10019Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F admission signalnameDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2026-03-31Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-12-31Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-09-30Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-06-30Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-03-31Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2024-12-31Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions70Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions62Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions65Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions69Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions52Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions78Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$3.4BMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$4.5BDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$4.1BSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$4.1BJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$3.1BMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$3.7BDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Formation year2010 (conversion of Duquesne Capital into a family office after August 2010 closure)
“closed Duquesne Capital in 2010 to convert it into a family office managing his own wealth”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) familyofficehub.ioInference
Foundation ico signalDruckenmiller FoundationNov 1, 2024IRS Form 990-PF private foundation filings (e-file index and Exempt Organizations BMF) apps.irs.govFact
Geographic mandateGlobal (US, Germany, Turkey, UK/Nevada deals)
“She leads the firm’s private investment strategy, which focuses on backing disruptive, high-growth technology and life sciences companies globally.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) pdsoros.orgInference
Headquarters40 West 57th Street, 25th Floor, New York, NY 10019
“40 WEST 57TH STREET, 25TH FLOOR”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
HeadquartersNew York, NYMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersNew York, NYDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersNew York, NYSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersNew York, NYJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersNew York, NYMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersNew York, NYDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Invests directlyPrivate investment strategy backing disruptive high-growth technology and life sciences companies globally
“She leads the firm’s private investment strategy, which focuses on backing disruptive, high-growth technology and life sciences companies globally.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) pdsoros.orgFact
Legal entityDuquesne Holding Co LLC (sole managing member of Duquesne Family Office LLC)
“Sole Managing Member of Duquesne Holding Co LLC, the sole Managing Member of Duquesne Family Office LLC, the General Partner of the Issuer”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
Legal entityJuggernaut Fund LP (Delaware pooled investment fund, GP Duquesne Family Office LLC; Form D total sold $1,281,718,133)
“General Counsel of Duquesne Family Office LLC, the General Partner of the Issuer”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
Legal entityNo Margin Fund LP (c/o Duquesne Family Office LLC, Form D filer)
“C/O DUQUESNE FAMILY OFFICE LLC”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
Legal entityDuquesne Family Office LLC is a Delaware limited liability company
“Delaware, United States ("DUQUESNE"); and”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) sec.govFact
Liquidity eventDuquesne Capital closed to outside investors August 2010
“According to Bloomberg News, on August 18, 2010, Druckenmiller announced the closing of his hedge fund”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) en.wikipedia.orgFact
Office type (stated)single_family_office
“Stan Druckenmiller Overhauls His Family Office's U.S. Stock Portfolio”
Sep 11, 2026DFX analyst research (General-assisted, every claim URL-cited) institutionalinvestor.comInference
Office type (stated)single_family_officeAug 18, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeAug 18, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeJul 31, 2026PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Office type (stated)single_family_officeJul 31, 2026PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Office type (stated)single_family_officeJul 7, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeJul 7, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeJun 5, 2026PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Office type (stated)single_family_officeJun 5, 2026PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Office type (stated)single_family_officeApr 23, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeApr 14, 2026GlobeNewswire releases that name a family office (discovery and investment records, quoted) globenewswire.comFact
Office type (stated)single_family_officeDec 14, 2025PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Office type (stated)single_family_officeDec 14, 2025PR Newswire releases that name a family office (discovery and investment records, quoted) prnewswire.comFact
Operating model inhouseKey employees co-invest in Duquesne vehicles under the family office rule key employee exception (Warsh holds Juggernaut Fund stakes)
“The Federal Reserve chair nominee has two stakes worth at least $50 million each in a vehicle called the Juggernaut Fund, according to the filings.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) cnbc.comFact
Philanthropy programDruckenmiller Foundation; $705M donated in 2009 incl. $100M NYU Neuroscience Institute
“In 2009, Druckenmiller donated $705 million to foundations that support medical research, education, and anti-poverty, including a $100 million gift to found a Neuroscience Institute at the NYU School”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) en.wikipedia.orgFact
Public stake filed (13D, 13G, Section 16)BBB FOODS INCJan 28, 2026SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Public stake filed (13D, 13G, Section 16)DAKTRONICS INC /SD/May 9, 2024SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Public stake filed (13D, 13G, Section 16)New Fortress Energy LLCFeb 13, 2019SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Public stake filed (13D, 13G, Section 16)Pure Storage, Inc.Oct 16, 2015SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
SectorsTechnology and life sciences (private); biotech thesis tied to AI
“Druckenmiller said in January that Duquesne had made substantial investments in biotech due to the potential of artificial intelligence.”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) cnbc.comFact
Stage preferenceVenture and growth rounds (Series A through C), often following on as an existing investor
“The financing included strong participation from existing investors Duquesne Family Office and Bristol Myers Squibb, along with new investors Catalio Capital Management, Eli Lilly and Company, and Was”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) prnewswire.comInference
Source of wealthHedge fund management: Duquesne Capital (founded 1981) and Soros Quantum Fund lead PM 1988 to 2000
“He is the former chairman and president of Duquesne Capital, which he founded in 1981. He closed the fund in August 2010,”
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) en.wikipedia.orgFact
Source of wealthDuquesne Capital Management (hedge fund founded by Stanley Druckenmiller, closed to outside investors 2010)
“Duquesne Family Office Cuts Back — Then Loads Up on New Bets”
Sep 11, 2026DFX analyst research (General-assisted, every claim URL-cited) institutionalinvestor.comInference
Website searchnot_foundSep 12, 2026DFX model output (classification rules, scores, mandates, matches) no URLInference