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OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)

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13F filer, CIK 1132716, CHICAGO, IL

OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) reported $4,228,956,783 across 322 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-15. Its ten largest share positions make up 67.22% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001132716-25-000010

Period
2025-03-31
Reported value
$4.23B
Holdings
322
Top 10 weight
67.22%
New
86
Sold out
183

Largest buys vs the previous quarter

SecurityShares changeApprox. value
INTRA-CELLULAR THERAPIES INCadded+3,070,849$405M
DISCOVER FINANCIAL SERVICESadded+1,222,493$209M
BEACON ROOFING SUPPLY INCnew+1,575,016$195M
WALGREENS BOOTS ALLIANCE INCnew+10,112,229$113M
H&E EQUIPMENT SERVICES INCnew+1,085,190$103M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
HASHICORP INCexited-6,858,790-$235M
SMARTSHEET INC. (CLASS A)exited-3,854,149-$216M
EDRexited-4,612,518-$144M
SUMMIT MATERIALS INC CLASS Aexited-2,033,333-$103M
ALTAIR ENGINEERING INCexited-897,580-$97.9M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Back to all 256 share positions

Options

Puts and calls, as filed. The amount and value describe the underlying shares, not the option premium, so they stay out of % of portfolio (H5).

SecurityTypeAmountValueChange
AALAMERICAN AIRLINES GROUP INC Stockput9,425,000$6.06M-1,220,000
LUCID GROUP INCLUCID GROUP INC COMput2,840,100$3.15M+1,265,100
HTZHERTZ GLOBAL HLDGS INC COM NEWput1,194,300$2.15M+259,700
TSLATESLA INC COMput12,500$1.76M+2,000
TLTISHARES TR 20 YR TR BD ETFcall1,650,000$1.68Mnew
XRXXEROX HOLDINGS CORP COM NEWput278,300$1.22M0
RIGTRANSOCEAN LTD Stockput803,400$927K0
MGMMGM RESORTS INTERNATIONAL COMput82,600$752K-42,400
CHTRCHARTER COMMUNICATIONS INC COMput20,500$654K+12,100
HOGHARLEY DAVIDSON INC Stockput240,000$642K+5,000
PTONPELOTON INTERACTIVE INC CL A COMput290,500$588K-209,500
CCCHEMOURS CO Stockput46,900$546K0
METAMETA PLATFORMS INC COMput16,000$452Knew
VSATVIASAT INC COMput73,300$425K0
LYVLIVE NATION ENTERTAINMENT IN Stockput32,500$370K-182,900
HLFHERBALIFE LTD COM SHSput82,400$367K0
XLISELECT SECTOR SPDR TR INDLput113,500$361Knew
SPYSTATE STR SPDR S&P 500 ETF T SHSput85,000$346K-45,000
XBISPDR SERIES TRUST S&P BIOTECHput200,000$328K+150,000
SPRINGWORKS THERAPEUTICS INCSPRINGWORKS THERAPEUTICS INC COMput45,000$315Knew
SABRSABRE CORP Stockput688,600$303K0
LVSLAS VEGAS SANDS CORP Stockput37,200$287K0
NCLHNORWEGIAN CRUISE LINE HLDGS Stockput188,800$267K-45,000
IWMISHARES TR SHSput45,000$172K+9,000
EWTXEDGEWISE THERAPEUTICS INC COMput45,000$169Knew
XIFRXPLR INFRASTRUCTURE LP COM UNIT PART INput20,600$165K-6,500
STWDSTARWOOD PPTY TR INC REITput172,500$160K+34,400
OMFONEMAIN HLDGS INC Stockput34,400$135K+3,900
MPTMEDICAL PROPERTIES TRUST INC REITput396,500$129K0
OCULOCULAR THERAPEUTIX INC COMcall120,000$123Knew
SLNOSOLENO THERAPEUTICS INC COMcall15,000$123K+5,000
FFORD MTR CO Stockput195,500$115K-325,400
VISNVISTANCE NETWORKS INC COMcall450,000$112Knew
VERAVERA THERAPEUTICS INC COMMON STOCKcall40,000$103K+25,000
TPHTRI POINTE HOMES INC COMput18,000$85.5Knew
CCLCARNIVAL CORP Stockput120,000$83.4K-380,000
QQQINVESCO QQQ TR COMput16,000$71.8Knew
INCYINCYTE CORP Stockcall55,000$70.8K+35,000
BGSB & G FOODS INC COMput113,600$59.6K-3,900
AERAERCAP HOLDINGS NV Stockcall112,500$59.1Knew
SYFSYNCHRONY FINANCIAL STOKput21,900$57.5K0
AESAES CORP Stockcall150,000$52.5Knew
ETENERGY TRANSFER L P COM UT LTD PTNcall320,000$49.6Knew
MGNIMAGNITE INC Stockcall107,000$48.1K0
FEFIRSTENERGY CORP COMput26,000$44.9K0
CECELANESE CORP DEL Stockcall70,000$40.2Knew
VNOVORNADO RLTY TR SH BEN INTput33,500$32.7K0
BLUEPRINT MEDICINES CORPBLUEPRINT MEDICINES CORP COMput10,000$30.8Knew
QUREUNIQURE NV SHScall65,000$29.2K-50,000
PRCTPROCEPT BIOROBOTICS CORP Stockput15,000$27.4Knew
OXYOCCIDENTAL PETE CORP COMput90,000$24.6Knew
CCLCARNIVAL CORP Stockcall150,000$24Knew
AKAMAKAMAI TECHNOLOGIES INC Stockcall37,500$14.1Knew
COOCOOPER COS INC COMput15,000$9.38K+3,000
PTGXPROTAGONIST THERAPEUTICS INC COMcall20,000$7.5Knew
GILDGILEAD SCIENCES INC COMput26,000$7.02Knew
BORRBORR DRILLING LTD COMMON STOCKcall200,000$5Knew
SLNOSOLENO THERAPEUTICS INC COMput18,000$450new

Principal amounts

Notes and convertibles filed as a face amount (PRN). A face amount is never added to a share count (H6).

SecurityTypeAmountValueChange
PELOTON INTERACTIVE INCPELOTON INTERACTIVE INC NOTE 2/1principal27,352,000$25.8M0
HALOZYME THERAPEUTICS INCHALOZYME THERAPEUTICS INC NOTE 1.000% 8/1principal15,000,000$19.3Mnew
FUBOTV INCFUBOTV INC NOTE 3.250% 2/1principal13,500,000$13M-10,000,000
SPOTIFY USA INCSPOTIFY USA INC NOTE 3/1principal10,000,000$11.9M0
AKAMAI TECHNOLOGIES INCAKAMAI TECHNOLOGIES INC NOTE 0.375% 9/0principal7,500,000$7.31Mnew
BEYOND MEAT INCBEYOND MEAT INC NOTE 3/1principal29,000,000$3.32M0
DRAFTKINGS INC NEWDRAFTKINGS INC NEW CNVprincipal2,000,000$1.76M0
INFINERA CORPINFINERA CORP BONDprincipal1,250,000$1.6M0

Sold out in Q1 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
HASHICORP INCHASHICORP INC6,858,790$235Mshares
SMARTSHEET INC. (CLASS A)SMARTSHEET INC. (CLASS A)3,854,149$216Mshares
EDRENDEAVOR GROUP HLDGS INC4,612,518$144Mshares
SUMMIT MATERIALS INC CLASS ASUMMIT MATERIALS INC CLASS A2,033,333$103Mshares
ALTAIR ENGINEERING INCALTAIR ENGINEERING INC897,580$97.9Mshares
REVANCE THERAPEUTICS INCREVANCE THERAPEUTICS INC40,000,000$38.3Mprincipal
ARCH RESOURCES INCARCH RESOURCES INC179,259$25.3Mshares
BALLYS CORPORATIONBALLYS CORPORATION1,349,803$24.1Mshares
ZUORA INCZUORA INC2,285,873$22.7Mshares
ARCADIUM LITHIUM PLCARCADIUM LITHIUM PLC4,400,241$22.6Mshares
XPEVXPENG INC1,759,750$20.8Mshares
CCKCROWN HLDGS INC213,370$17.6Mshares
FLUTFLUTTER ENTMT PLC68,000$17.6Mshares
ALVAUTOLIV INC162,490$15.2Mshares
TELTE CONNECTIVITY PLC99,600$14.2Mshares
TCOMTRIP COM GROUP LTD189,500$13Mshares
CARRCARRIER GLOBAL CORPORATION187,000$12.8Mshares
DOWDOW HLDGS INC261,700$10.5Mshares
TOSTTOAST INC250,000$9.11Mshares
LILI AUTO INC371,950$8.92Mshares
FTAIFTAI AVIATION LTD61,000$8.79Mshares
OXY/WSOCCIDENTAL PETE CORP300,000$8.25Mshares
FLSFLOWSERVE CORP130,000$7.48Mshares
SHOPSHOPIFY INC70,000$7.44Mshares
TSMTAIWAN SEMICONDUCTOR MANUFAC37,500$7.41Mshares
CFLTCONFLUENT INC-CLASS A262,500$7.34Mshares
MMM3M CO56,300$7.27Mshares
VFCV F CORP325,000$6.97Mshares
SK GROWTH OPPORTUNITIES CORPSK GROWTH OPPORTUNITIES CORP594,910$6.91Mshares
ROKROCKWELL AUTOMATION INC24,000$6.86Mshares
GDXVANECK ETF TRUST200,000$6.78Mshares
BKRBAKER HUGHES COMPANY145,990$5.99Mshares
WDAYWORKDAY INC20,900$5.39Mshares
FLRFLUOR CORP106,130$5.23Mshares
INFORMATICA INCINFORMATICA INC200,000$5.19Mshares
SPTSPROUT SOCIAL INC150,000$4.61Mshares
CDECOEUR MNG INC800,000$4.58Mshares
ROKUROKU INC58,500$4.35Mshares
BILIBILIBILI INC231,163$4.19Mshares
GEVGE VERNOVA INC12,400$4.08Mshares
VSTVISTRA CORP28,910$3.99Mshares
CLHCLEAN HARBORS INC17,200$3.96Mshares
JDJD.COM INC108,100$3.75Mshares
ARCBARCBEST CORP40,130$3.74Mshares
BIDUBAIDU INC43,756$3.69Mshares
ORCLORACLE CORP20,729$3.45Mshares
ANETARISTA NETWORKS INC30,000$3.32Mshares
NTESNETEASE COM INC36,000$3.21Mshares
GWWWW GRAINGER INC3,000$3.16Mshares
NBIXNEUROCRINE BIOSCIENCES INC23,111$3.15Mshares
Patria Latin American Oppor…Patria Latin American Opportunity…237,964$2.77Mshares
SNOWSNOWFLAKE INC17,500$2.7Mshares
SLVISHARES SILVER TR100,000$2.63Mshares
PCARPACCAR INC25,000$2.6Mshares
BARNES GROUP INCBARNES GROUP INC52,890$2.5Mshares
ABTABBOTT LABORATORIES20,396$2.31Mshares
MCDMCDONALDS CORP7,500$2.17Mshares
TWLOTWILIO INC20,000$2.16Mshares
TFXTELEFLEX INCORPORATED11,593$2.06Mshares
DECKDECKERS OUTDOOR CORP10,000$2.03Mshares
INVZINNOVIZ TECHNOLOGIES LTD1,150,000$1.93Mshares
TJXTJX COS INC NEW15,000$1.81Mshares
ONON SEMICONDUCTOR CORP27,500$1.73Mshares
ADIANALOG DEVICES INC8,000$1.7Mshares
CDLXCARDLYTICS INC450,000$1.67Mshares
COTYCOTY INC1,264,500$1.62Mput
ALGSALIGOS THERAPEUTICS INC40,096$1.6Mshares
FFIVF5 INC6,000$1.51Mshares
ZSZSCALER INC8,100$1.46Mshares
CAPRCAPRICOR THERAPEUTICS INC104,798$1.45Mshares
PARAGON 28 INCPARAGON 28 INC138,854$1.43Mshares
YUMCYUM CHINA HLDGS INC28,900$1.39Mshares
STNESTONECO LTD173,478$1.38Mshares
PLRXPLIANT THERAPEUTICS INC103,563$1.36Mshares
AFYAAFYA LTD77,815$1.24Mshares
ASTRIA THERAPEUTICS INCASTRIA THERAPEUTICS INC129,666$1.16Mshares
ALLAKOS INCALLAKOS INC936,797$1.13Mshares
MLTXMOONLAKE IMMUNOTHERAPEUTICS20,740$1.12Mshares
IOVAIOVANCE BIOTHERAPEUTICS INC149,913$1.11Mshares
BOXBOX INC32,500$1.03Mshares
KARYOPHARM THERAPEUTICS INCKARYOPHARM THERAPEUTICS INC1,483,727$1Mshares
SONOSONOS INC65,000$978Kshares
ITEOS THERAPEUTICS INCITEOS THERAPEUTICS INC125,589$965Kshares
BLCOBAUSCH PLUS LOMB CORP52,460$947Kshares
ELFE L F BEAUTY INC7,500$942Kshares
XNCRXENCOR INC39,040$897Kshares
OVIDOVID THERAPEUTICS INC943,416$881Kshares
MSTRSTRATEGY INC2,937$851Kshares
ZMZOOM COMMUNICATIONS INC10,000$816Kshares
MGNIMAGNITE INC50,000$796Kshares
BSXBOSTON SCIENTIFIC CORP8,334$744Kshares
ACELYRIN INCACELYRIN INC211,938$665Kshares
ABNBAIRBNB INC5,000$657Kshares
PRQRPROQR THRAPEUTICS N V227,020$602Kshares
ADSKAUTODESK INC1,983$586Kshares
INARI MED INCINARI MED INC11,102$567Kshares
THRDTHIRD HARMONIC BIO INC53,740$553Kshares
MRVLMARVELL TECHNOLOGY INC5,000$552Kshares
VTYXVENTYX BIOSCIENCES INC244,000$534Kshares
GPCRSTRUCTURE THERAPEUTICS INC19,520$529Kshares
TMTOYOTA MOTOR CORP2,700$525Kshares
ASANASANA INC25,000$507Kshares
ESTCELASTIC N V5,000$495Kshares
CPRICAPRI HOLDINGS LIMITED12,600$494Kput
WVEWAVE LIFE SCIENCES LTD39,767$492Kshares
ISRGINTUITIVE SURGICAL INC935$488Kshares
TXNTEXAS INSTRS INC2,500$469Kshares
NOWSERVICENOW INC438$464Kshares
DELLDELL TECHNOLOGIES INC4,000$461Kshares
HYGISHARES TR1,550,000$438Kput
DNLIDENALI THERAPEUTICS INC21,039$429Kshares
PDPAGERDUTY INC22,500$411Kshares
BOLDBOUNDLESS BIO INC140,000$406Kshares
CARGO THERAPEUTICS INC COMCARGO THERAPEUTICS INC COM26,899$388Kshares
ARGXARGENX SE610$375Kshares
CGONCG ONCOLOGY INC12,834$368Kshares
SMCISUPER MICRO COMPUTER INC10,000$305Kshares
CYPHCYPHERPUNK TECHNOLOGIES INC105,108$302Kshares
ALKSALKERMES PLC9,710$279Kshares
SEPNSEPTERNA INC12,118$278Kshares
PANWPALO ALTO NETWORKS INC1,412$257Kshares
ARDXARDELYX INC49,701$252Kshares
HAPNHAPPEN INC15,000$243Kshares
FTNTFORTINET INC2,537$240Kshares
NERVMINERVA NEUROSCIENCES INC107,256$238Kshares
INTUINTUIT377$237Kshares
SCYXSCYNEXIS INC195,393$236Kshares
ZTOZTO EXPRESS CAYMAN INC11,800$231Kshares
PYXSPYXIS ONCOLOGY INC146,400$228Kshares
BDTXBLACK DIAMOND THERAPEUTICS I104,560$224Kshares
SRRKSCHOLAR ROCK HLDG CORP40,000$203Kcall
ZURAZURA BIO LTD80,912$202Kshares
ALTALTIMMUNE INC26,899$194Kshares
SVRASAVARA INC48,482$149Kshares
RSPINVESCO EXCHANGE TRADED FD T50,000$125Kput
RSPINVESCO EXCHANGE TRADED FD T45,000$114Kcall
DXCMDEXCOM INC20,000$108Kcall
HILLEVAX INCHILLEVAX INC51,779$107Kshares
GTMZOOMINFO TECHNOLOGIES INC10,000$105Kshares
VERONA PHARMA PLCVERONA PHARMA PLC25,000$100Kcall
ALECALECTOR INC50,000$94.5Kshares
NKENIKE INC68,000$84Kput
LEGNLEGEND BIOTECH CORP20,000$81Kput
RAPT THERAPEUTICS INCRAPT THERAPEUTICS INC40,000$63.2Kshares
DTILPRECISION BIOSCIENCES INC15,534$59.2Kshares
XBISPDR SERIES TRUST90,000$55.5Kcall
IWMISHARES TR45,000$55.5Kcall
TGTXTG THERAPEUTICS INC40,000$55Kcall
CAPRCAPRICOR THERAPEUTICS INC30,000$54Kcall
DYNDYNE THERAPEUTICS INC20,000$49Kcall
IRTCIRHYTHM HOLDINGS INC15,000$44.5Kcall
IMCRIMMUNOCORE HLDGS PLC17,500$42.9Kcall
PRAXPRAXIS PRECISION MEDICINES I10,000$41.8Kcall
XLVSELECT SECTOR SPDR TR60,000$37.5Kcall
AGENAGENUS INC12,888$35.3Kshares
RGNXREGENXBIO INC80,000$30Kcall
KARYOPHARM THERAPEUTICS INCKARYOPHARM THERAPEUTICS INC400,000$30Kcall
CYHCOMMUNITY HEALTH SYS INC NEW270,000$27Kcall
SNDXSYNDAX PHARMACEUTICALS INC100,000$25Kput
BAXBAXTER INTL INC50,000$23.8Kcall
NBIXNEUROCRINE BIOSCIENCES INC15,000$18Kput
CORTCORCEPT THERAPEUTICS INC40,000$17.5Kcall
NVONOVO-NORDISK A S10,000$15.2Kput
ARVNARVINAS INC40,000$15Kcall
SPRINGWORKS THERAPEUTICS INCSPRINGWORKS THERAPEUTICS INC25,000$13.8Kcall
IEFISHARES TR75,000$12.4Kcall
ARKOARKO CORP80,000$12Kcall
BEAMBEAM THERAPEUTICS INC20,000$11Kcall
SLVISHARES SILVER TR708,300$10.6Kcall
VKTXVIKING THERAPEUTICS INC25,000$8.12Kcall
CSLM ACQUISITION CORPCSLM ACQUISITION CORP67,295$6.39Kshares
BEBLOOM ENERGY CORP35,000$5.25Kput
EWTXEDGEWISE THERAPEUTICS INC15,000$4.88Kcall
SKTTANGER INC24,200$4.24Kput
CRSPCRISPR THERAPEUTICS AG20,000$4Kcall
ARDXARDELYX INC120,000$3Kcall
GERNGERON CORP53,000$2.65Kcall
AMANTERO MIDSTREAM CORP95,800$2.4Kput
IOVAIOVANCE BIOTHERAPEUTICS INC90,000$2.25Kcall
EPREPR PPTYS25,700$1.93Kput
VSTVISTRA CORP27,900$1.4Kput
WDCWESTERN DIGITAL CORP14,500$508put
WinVest Acquisition CorpWinVest Acquisition Corp17,995$299shares

How Q1 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001132716-25-000010 base2025-05-15acceptance time not in the bulk data set
13F-HR/A 0001132716-25-000020 addednew holdings2025-08-14acceptance time not in the bulk data set
13F-HR/A 0001132716-25-000034 addednew holdings2025-11-14acceptance time not in the bulk data set
13F-HR/A 0001132716-26-000007 addednew holdings2026-02-13acceptance time not in the bulk data set
13F-HR/A 0001132716-26-000014 addednew holdings2026-05-15acceptance time not in the bulk data set