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Hedge fund, long-only 13F filer

Citadel Advisors

Citadel Advisors is the multi-strategy investment firm Ken Griffin founded in 1990, running equities, fixed income and macro, credit, commodities and quantitative strategies. Its books are heavily hedged with options, which inflates the notional value a 13F discloses. 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.

174.1BUSDreported value
13,572positions
+33.0BUSDon the prior filing
SPYlargest holding, 4.1%

What did Citadel Advisors change last quarter?

In the quarter ended 30 June 2026 Citadel Advisors opened 2,666 positions, the largest SPACE EXPLORATION TECHN CORP (SPCX) at 1.4B USD, then SPACE EXPLORATION TECHN CORP and ROUNDHILL ETF TRUST. It added to 4,609, trimmed 2,975 and sold out of 1,951, against the filing before.

Against the previous quarter's 13F, largest first within each kind; the 20 largest of each kind are listed

Quarterly changes by position
PositionChangeShares movedValue after
SPCXSPACE EXPLORATION TECHN CORP, call optionNew buy+8.3M1.4B USD
SPCXSPACE EXPLORATION TECHN CORP, put optionNew buy+5.7M973.5M USD
ROUNDHILL ETF TRUSTcall optionNew buy+12.3M907.9M USD
SPCXSPACE EXPLORATION TECHN CORPNew buy+5.1M876.5M USD
ROUNDHILL ETF TRUSTput optionNew buy+11.2M824.1M USD
CEREBRAS SYSTEMS INCNo US ticker on fileNew buy+1.2M275.8M USD
MADISON AIR SOLUTIONS CORPNo US ticker on fileNew buy+6.4M251.5M USD
CEREBRAS SYSTEMS INCcall optionNew buy+988.9K218.5M USD
CEREBRAS SYSTEMS INCput optionNew buy+877.6K193.9M USD
QUANTINUUM INCNo US ticker on fileNew buy+2.3M188.0M USD
ALPHABET INCNo US ticker on fileNew buy+3.5M177.9M USD
HONHONEYWELL INTL INC, put optionNew buy+708.9K158.7M USD
HONEYWELL AEROSPACE INCNo US ticker on fileNew buy+704.5K155.8M USD
HONHONEYWELL INTL INCNew buy+679.2K152.1M USD
INNIO NVNo US ticker on fileNew buy+3.8M149.7M USD
MUUDIREXION SHARES ETF TRUST, call optionNew buy+138.1K144.8M USD
AEISADVANCED ENERGY INDSNew buy+387.9K144.6M USD
CCLCARNIVAL CORP LTD, put optionNew buy+5.1M144.3M USD
MUUDIREXION SHARES ETF TRUST, put optionNew buy+135.0K141.6M USD
FMDEFIDELITY COVINGTON TRUSTNew buy+2.9M118.7M USD
SPYSTATE STR SPDR S&P 500 ETF T, call optionAdded+20.7M35.7B USD
QQQINVESCO QQQ TR, call optionAdded+12.4M23.5B USD
MUMICRON TECHNOLOGY INC, call optionAdded+3.8M16.3B USD
IVVISHARES TRAdded+13.6M13.2B USD
SNDKSANDISK CORP, put optionAdded+2.7M11.7B USD
SMHVANECK ETF TRUST, put optionAdded+13.0M11.6B USD
SNDKSANDISK CORP, call optionAdded+1.0M10.3B USD
MSFTMICROSOFT CORP, call optionAdded+7.0M9.7B USD
AMDADVANCED MICRO DEVICES INC, put optionAdded+3.3M9.4B USD
MSFTMICROSOFT CORP, put optionAdded+6.4M6.3B USD
SMHVANECK ETF TRUST, call optionAdded+3.3M4.9B USD
TSMTAIWAN SEMICONDUCTOR MANUFAC, call optionAdded+4.6M3.7B USD
WDCWESTERN DIGITAL CORP, put optionAdded+2.2M3.7B USD
INTCINTEL CORP, call optionAdded+5.9M3.4B USD
STXSEAGATE TECHNOLOGY HLDNGS PL, put optionAdded+1.1M3.1B USD
CATCATERPILLAR INC, put optionAdded+1.1M2.9B USD
ASMLASML HLDG NV, put optionAdded+294.2K2.9B USD
MRVLMARVELL TECHNOLOGY INC, put optionAdded+4.7M2.8B USD
LLYELI LILLY & CO, put optionAdded+767.4K2.8B USD
TLTISHARES TR, put optionAdded+12.7M2.7B USD
GLDSPDR GOLD TR, call optionTrimmed−8.6M4.9B USD
GLDSPDR GOLD TR, put optionTrimmed−4.2M3.0B USD
UNHUNITEDHEALTH GROUP INC, call optionTrimmed−2.5M2.6B USD
NVDANVIDIA CORPORATIONTrimmed−6.8M2.4B USD
NFLXNETFLIX INC., put optionTrimmed−11.1M2.2B USD
SLVISHARES SILVER TR, call optionTrimmed−15.2M1.7B USD
XOMEXXON MOBIL CORP, call optionTrimmed−2.9M815.9M USD
SLVISHARES SILVER TR, put optionTrimmed−14.7M799.8M USD
EEMISHARES TR, call optionTrimmed−11.1M715.6M USD
USOUNITED STS OIL FD LP, put optionTrimmed−3.9M715.4M USD
MUMICRON TECHNOLOGY INCTrimmed−4.0M693.2M USD
EEMISHARES TR, put optionTrimmed−3.6M689.9M USD
METAMETA PLATFORMS INCTrimmed−709.4K631.1M USD
INTCINTEL CORPTrimmed−2.1M589.0M USD
TSLATESLA INCTrimmed−866.1K515.8M USD
NSCNORFOLK SOUTHN CORPTrimmed−1.0M498.8M USD
MRKMERCK & CO INC, call optionTrimmed−2.1M447.9M USD
UNHUNITEDHEALTH GROUP INCTrimmed−478.2K442.3M USD
DDOGDATADOG INCTrimmed−1.3M370.5M USD
DALDELTA AIR LINES INC, call optionTrimmed−1.9M358.8M USD
WESTERN DIGITAL CORPNo US ticker on fileSold out−97.3Mwas 696.7M USD
IEFISHARES TRSold out−3.4Mwas 327.5M USD
LIVE NATION ENTERTAINMENT INNo US ticker on fileSold out−142.8Mwas 217.3M USD
CTRACOTERRA ENERGY INCSold out−6.2Mwas 216.4M USD
CWANCLEARWATER ANALYTICS HLDGS ISold out−8.4Mwas 199.6M USD
HONHONEYWELL INTL INC, call optionSold out−799.4Kwas 180.7M USD
TERNTERNS PHARMACEUTICALS INCSold out−3.2Mwas 169.7M USD
GMEDGLOBUS MED INCSold out−2.0Mwas 169.4M USD
PTGXPROTAGONIST THERAPEUTICS INCSold out−1.6Mwas 163.6M USD
CCLCARNIVAL CORP, put optionSold out−5.2Mwas 134.0M USD
HONHONEYWELL INTL INC, put optionSold out−551.8Kwas 124.7M USD
CCLCARNIVAL CORPSold out−4.7Mwas 121.4M USD
HONHONEYWELL INTL INCSold out−521.9Kwas 118.0M USD
FTITECHNIPFMC PLCSold out−1.5Mwas 104.6M USD
MIRMMIRUM PHARMACEUTICALS INCSold out−1.1Mwas 97.2M USD
ALHCALIGNMENT HEALTHCARE INCSold out−5.4Mwas 94.5M USD
MTZMASTEC INCSold out−279.8Kwas 90.0M USD
COLBCOLUMBIA BKG SYS INCSold out−3.2Mwas 87.1M USD
HOLXHOLOGIC INCSold out−1.1Mwas 82.4M USD
IOTSAMSARA INCSold out−2.5Mwas 79.7M USD

Rows sharing a company name are separate securities of the same issuer — different share classes or option positions, as filed.

References
  1. SEC EDGAR Form 13F-HR, quarterly, up to 45 days delayed. Filings are public records. Ticker mapping via SEC public files and OpenFIGI.
  2. Finazon prior-day close, indicative (IEX-derived, not the official close), some closes dollar-rounded at the source
What Citadel Advisors bought and sold last quarter — 13F changes · The Distributed