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Form NPORT-P MFS SERIES TRUST I For: May 31

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StreetInsider.com Top Tickers, 4/25/2024

1. META
2. CMG
3. LRCX
4. IBM
5. SPY
6. BA
7. HCP
8. SNAP
9. TMUS
10. MSFT


July 26, 2021 9:47 AM EDT 

  
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      MFS SERIES TRUST I
      811-04777
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      BOSTON
      
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      617-954-5000
      MFS New Discovery Fund
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      2021-08-31
      2021-05-31
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            UST
          
        
      
      
        
          
          
          
          
          
          
          
          
          
        
        
        
        
      
      
      
      
      
      
    
    
      
        Charles River Laboratories International Inc
        549300BSQ0R4UZ5KX287
        Charles River Laboratories International Inc
        159864107
        
          
        
        98411.00000000
        NS
        USD
        33261933.89000000
        1.107029331114
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        AZEK Co Inc/The
        N/A
        AZEK Co Inc/The
        05478C105
        
          
        
        802916.00000000
        NS
        USD
        34950933.48000000
        1.163242902236
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Penn National Gaming Inc
        N/A
        Penn National Gaming Inc
        707569109
        
          
        
        222144.00000000
        NS
        USD
        18209143.68000000
        0.606039811602
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Bank OZK
        549300VYK2WBD7SST478
        Bank OZK
        06417N103
        
          
        
        329168.00000000
        NS
        USD
        14058765.28000000
        0.467906213020
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Vertex Inc
        549300QMYW171MP1PL50
        Vertex Inc
        92538J106
        
          
        
        1719056.00000000
        NS
        USD
        33023065.76000000
        1.099079281455
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Alkami Technology Inc
        N/A
        Alkami Technology Inc
        01644J108
        
          
        
        274705.00000000
        NS
        USD
        9139435.35000000
        0.304180239060
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        DoubleVerify Holdings Inc
        N/A
        DoubleVerify Holdings Inc
        25862V105
        
          
        
        694187.00000000
        NS
        USD
        25608558.43000000
        0.852308389624
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Acutus Medical Inc
        N/A
        Acutus Medical Inc
        005111109
        
          
        
        754198.00000000
        NS
        USD
        12270801.46000000
        0.408398897593
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Trex Co Inc
        N/A
        Trex Co Inc
        89531P105
        
          
        
        215903.00000000
        NS
        USD
        21031111.23000000
        0.699961014730
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Laird Superfood Inc
        N/A
        Laird Superfood Inc
        50736T102
        
          
        
        172873.00000000
        NS
        USD
        5649489.64000000
        0.188027273398
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          
        
      
      
        Sensata Technologies Holding PLC
        529900MS7KFYCY9MS037
        Sensata Technologies Holding PLC
        000000000
        
          
        
        654379.00000000
        NS
        USD
        38889743.97000000
        1.294335061717
        Long
        EC
        CORP
        GB
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Advanced Drainage Systems Inc
        6QQTOZ5MF5DHM7K92I60
        Advanced Drainage Systems Inc
        00790R104
        
          
        
        142454.00000000
        NS
        USD
        16157132.68000000
        0.537744433099
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        QTS Realty Trust Inc
        5493006PA4CJK4OG2J54
        QTS Realty Trust Inc
        74736A103
        
          
        
        850962.00000000
        NS
        USD
        53933971.56000000
        1.795039598656
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        PerkinElmer Inc
        549300IKL1SDPFI7N655
        PerkinElmer Inc
        714046109
        
          
        
        102257.00000000
        NS
        USD
        14834422.99000000
        0.493721784620
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Hamilton Lane Inc
        5493006OKN3V1NORM833
        Hamilton Lane Inc
        407497106
        
          
        
        232551.00000000
        NS
        USD
        21015633.87000000
        0.699445894607
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        JetBlue Airways Corp
        54930070J9H97ZO93T57
        JetBlue Airways Corp
        477143101
        
          
        
        1954568.00000000
        NS
        USD
        39286816.80000000
        1.307550507062
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Orchard Therapeutics plc
        21380056R45ONMT94Z50
        Orchard Therapeutics plc
        68570P101
        
          
        
        329462.00000000
        NS
        USD
        1723086.26000000
        0.057348049460
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        8x8 Inc
        254900XWSOC5U1BRW939
        8x8 Inc
        282914100
        
          
        
        956439.00000000
        NS
        USD
        22524138.45000000
        0.749652200160
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Manchester United Plc
        529900GWGZPE83MJOV59
        Manchester United Plc
        000000000
        
          
        
        1836015.00000000
        NS
        USD
        28696914.45000000
        0.955095579039
        Long
        EC
        CORP
        KY
        
        N
        
        1
        
          N
          N
          N
        
      
      
        ExlService Holdings Inc
        81E3DTNF6OSH489ZOV15
        ExlService Holdings Inc
        302081104
        
          
        
        422303.00000000
        NS
        USD
        43066459.94000000
        1.433345231775
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Leslie's Inc
        N/A
        Leslie's Inc
        527064109
        
          
        
        1868596.00000000
        NS
        USD
        54488259.36000000
        1.813487499325
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ollie's Bargain Outlet Holdings Inc
        529900YO5DSQCPEFDZ05
        Ollie's Bargain Outlet Holdings Inc
        681116109
        
          
        
        147375.00000000
        NS
        USD
        12739095.00000000
        0.423984722701
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Allovir Inc
        N/A
        Allovir Inc
        019818103
        
          
        
        404016.00000000
        NS
        USD
        9470135.04000000
        0.315186642291
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        State Street Global Advisors
        5493008BJIBKQ5KTIF74
        State Street Navigator Securities Lending Government Money Market Portfolio
        857492706
        
          
        
        40886832.00000000
        NS
        USD
        40886832.00000000
        1.360802484607
        Long
        STIV
        RF
        US
        N
        
        1
        
          
          N
          N
        
      
      
        Berkeley Lights Inc
        549300LTLRE4N65CD358
        Berkeley Lights Inc
        084310101
        
          
        
        256034.00000000
        NS
        USD
        11137479.00000000
        0.370679467058
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        TMX Group Ltd
        549300N65GFVKSHGJW59
        TMX Group Ltd
        000000000
        
          
        
        151326.00000000
        NS
        
        16828057.48000000
        0.560074266206
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Stamps.com Inc
        5299008VAXLEGU4Y4038
        Stamps.com Inc
        852857200
        
          
        
        180330.00000000
        NS
        USD
        33844334.40000000
        1.126412883771
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Prosperity Bancshares Inc
        N/A
        Prosperity Bancshares Inc
        743606105
        
          
        
        309180.00000000
        NS
        USD
        23265795.00000000
        0.774336139380
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Adaptive Biotechnologies Corp
        549300ZTF7OT1FW66Q96
        Adaptive Biotechnologies Corp
        00650F109
        
          
        
        335540.00000000
        NS
        USD
        12686767.40000000
        0.422243146633
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Abcam PLC
        213800B9N83DSNT33F79
        Abcam PLC
        000000000
        
          
        
        1245796.00000000
        NS
        
        25034480.19000000
        0.833201820170
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        Collegium Pharmaceutical Inc
        54930049FXZMTLW8D496
        Collegium Pharmaceutical Inc
        19459J104
        
          
        
        511358.00000000
        NS
        USD
        12216342.62000000
        0.406586389234
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Axalta Coating Systems Ltd
        529900AGLPA40GV6H619
        Axalta Coating Systems Ltd
        000000000
        
          
        
        1110619.00000000
        NS
        USD
        36028480.36000000
        1.199106000448
        Long
        EC
        CORP
        BM
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Advanced Energy Industries Inc
        549300756XI3QLFT2U27
        Advanced Energy Industries Inc
        007973100
        
          
        
        445913.00000000
        NS
        USD
        45487585.13000000
        1.513925531420
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        GCM Grosvenor Inc
        N/A
        GCM Grosvenor Inc
        36831E108
        
          
        
        827478.00000000
        NS
        USD
        9888362.10000000
        0.329106146310
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          
        
      
      
        Pagerduty Inc
        549300U1SB749EDAGH21
        Pagerduty Inc
        69553P100
        
          
        
        654633.00000000
        NS
        USD
        26610831.45000000
        0.885666210447
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Avalara Inc
        549300Q16CMW239SS315
        Avalara Inc
        05338G106
        
          
        
        85444.00000000
        NS
        USD
        11293133.48000000
        0.375859985889
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Turning Point Therapeutics Inc
        N/A
        Turning Point Therapeutics Inc
        90041T108
        
          
        
        192279.00000000
        NS
        USD
        12725024.22000000
        0.423516416612
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Gerresheimer AG
        5299006GD4UWSYZOKC28
        Gerresheimer AG
        000000000
        
          
        
        339958.00000000
        NS
        
        37600745.57000000
        1.251434398115
        Long
        EC
        CORP
        DE
        N
        
        1
        
          N
          N
          N
        
      
      
        Generac Holdings Inc
        529900S2H2AHJHSFFI84
        Generac Holdings Inc
        368736104
        
          
        
        111174.00000000
        NS
        USD
        36545117.28000000
        1.216300798137
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Big Yellow Group PLC
        213800W7Q4V2ZI8LIW31
        Big Yellow Group PLC
        000000000
        
          
        
        1284237.00000000
        NS
        
        23838631.20000000
        0.793401371047
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        nCino Inc
        549300WVRR2WR3L6MZ46
        nCino Inc
        63947U107
        
          
        
        331280.00000000
        NS
        USD
        20247833.60000000
        0.673891835660
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Genius Sports Ltd
        N/A
        Genius Sports Ltd
        000000000
        
          
        
        1701164.00000000
        NS
        USD
        40998052.40000000
        1.364504140844
        Long
        EC
        CORP
        GG
        
        N
        
        1
        
          N
          N
          
        
      
      
        WNS Holdings Ltd
        529900RM7QHUD3W9DM42
        WNS Holdings Ltd
        92932M101
        
          
        
        553724.00000000
        NS
        USD
        41252438.00000000
        1.372970645574
        Long
        EC
        CORP
        JE
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Syneos Health Inc
        549300F1ZGKDS8P6GU13
        Syneos Health Inc
        87166B102
        
          
        
        358555.00000000
        NS
        USD
        31516984.50000000
        1.048953629250
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Array Technologies Inc
        N/A
        Array Technologies Inc
        04271T100
        
          
        
        1883937.00000000
        NS
        USD
        30708173.10000000
        1.022034630911
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Nevro Corp
        254900SH91I4BOYKUE38
        Nevro Corp
        64157F103
        
          
        
        129502.00000000
        NS
        USD
        19515951.40000000
        0.649533208016
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Recursion Pharmaceuticals Inc
        N/A
        Recursion Pharmaceuticals Inc
        75629V104
        
          
        
        654933.00000000
        NS
        USD
        17264033.88000000
        0.574584506773
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Bioxcel Therapeutics Inc
        549300Y25FYZ0E8LW260
        Bioxcel Therapeutics Inc
        09075P105
        
          
        
        189484.00000000
        NS
        USD
        6258656.52000000
        0.208301668926
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        WisdomTree Investments Inc
        549300WIU8IS7UFO7871
        WisdomTree Investments Inc
        97717P104
        
          
        
        5320259.00000000
        NS
        USD
        35645735.30000000
        1.186367414377
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Sana Biotechnology Inc
        N/A
        Sana Biotechnology Inc
        799566104
        
          
        
        326615.00000000
        NS
        USD
        6849116.55000000
        0.227953459896
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        MetroMile Inc
        N/A
        MetroMile Inc
        591697107
        
          
        
        2459541.00000000
        NS
        USD
        20856907.68000000
        0.694163142602
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          
        
      
      
        Health Catalyst Inc
        549300223PL6GWKVJG92
        Health Catalyst Inc
        42225T107
        
          
        
        234097.00000000
        NS
        USD
        12568667.93000000
        0.418312540021
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        ThredUp Inc
        N/A
        ThredUp Inc
        88556E102
        
          
        
        975825.00000000
        NS
        USD
        23019711.75000000
        0.766145954872
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Guardant Health Inc
        254900M8C3E5VC8BR186
        Guardant Health Inc
        40131M109
        
          
        
        98282.00000000
        NS
        USD
        12198761.84000000
        0.406001262729
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Vroom Inc
        N/A
        Vroom Inc
        92918V109
        
          
        
        510647.00000000
        NS
        USD
        22575703.87000000
        0.751368409224
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        GROSVENOR CAPITAL MGMT PIPE
        N/A
        GROSVENOR CAPITAL MGMT PIPE PIPE SHARES
        000000000
        
          
        
        1262527.00000000
        NS
        USD
        15087197.65000000
        0.502134673771
        Long
        EC
        CORP
        US
        Y
        
        2
        
          N
          N
          N
        
      
      
        Skechers USA Inc
        529900D2R54KZPA4XR56
        Skechers USA Inc
        830566105
        
          
        
        838641.00000000
        NS
        USD
        39835447.50000000
        1.325810127169
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Olink Holding AB
        8945004Z7ZHV3LML4J27
        Olink Holding AB
        680710100
        
          
        
        326453.00000000
        NS
        USD
        11533584.49000000
        0.383862717229
        Long
        EC
        CORP
        SE
        N
        
        1
        
          N
          N
          N
        
      
      
        Oatly Group AB
        894500CEIOQNBAH10Z10
        Oatly Group AB
        67421J108
        
          
        
        1270869.00000000
        NS
        USD
        30132303.99000000
        1.002868457417
        Long
        EC
        CORP
        SE
        N
        
        1
        
          N
          N
          N
        
      
      
        ICON PLC
        6354008SRQGEMC4XFI67
        ICON PLC
        000000000
        
          
        
        165178.00000000
        NS
        USD
        36960229.28000000
        1.230116626201
        Long
        EC
        CORP
        IE
        N
        
        1
        
          N
          N
          N
        
      
      
        Schneider National Inc
        529900V6GZ6G6E3BLV72
        Schneider National Inc
        80689H102
        
          
        
        973214.00000000
        NS
        USD
        23834010.86000000
        0.793247596107
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Zendesk Inc
        549300SLI6BN94BKKO36
        Zendesk Inc
        98936J101
        
          
        
        107548.00000000
        NS
        USD
        14697509.68000000
        0.489165012591
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        PRA Health Sciences Inc
        549300R1HR1VWWHIAK47
        PRA Health Sciences Inc
        69354M108
        
          
        
        134185.00000000
        NS
        USD
        22934900.20000000
        0.763323242465
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Procore Technologies Inc
        N/A
        Procore Technologies Inc
        74275K108
        
          
        
        183245.00000000
        NS
        USD
        15836032.90000000
        0.527057535703
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Immunocore Holdings PLC
        213800IUE3DFS84BVN18
        Immunocore Holdings PLC
        45258D105
        
          
        
        65377.00000000
        NS
        USD
        2680457.00000000
        0.089211424976
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        Knight-Swift Transportation Holdings Inc
        N/A
        Knight-Swift Transportation Holdings Inc
        499049104
        
          
        
        706304.00000000
        NS
        USD
        33711889.92000000
        1.122004844101
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Boyd Group Services Inc
        549300FVHMLW88VSTP09
        Boyd Group Services Inc
        103310108
        
          
        
        101496.00000000
        NS
        
        17628318.96000000
        0.586708704656
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Bright Horizons Family Solutions Inc
        N/A
        Bright Horizons Family Solutions Inc
        109194100
        
          
        
        128518.00000000
        NS
        USD
        17765043.14000000
        0.591259182028
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Everbridge Inc
        549300WCY0UMR64ATW81
        Everbridge Inc
        29978A104
        
          
        
        324641.00000000
        NS
        USD
        38145317.50000000
        1.269558933549
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Paylocity Holding Corp
        549300VH75FTB4DIEE07
        Paylocity Holding Corp
        70438V106
        
          
        
        128901.00000000
        NS
        USD
        21891256.83000000
        0.728588526630
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Littelfuse Inc
        549300MY7HLQFYTPCX75
        Littelfuse Inc
        537008104
        
          
        
        54509.00000000
        NS
        USD
        14239931.16000000
        0.473935806598
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Keywords Studios PLC
        2138007VR9ZYCWS7VE12
        Keywords Studios PLC
        000000000
        
          
        
        1043937.00000000
        NS
        
        38696871.54000000
        1.287915848754
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        MFS Institutional Money Market Portfolio
        5L2W638H85N8T1136O07
        MFS Institutional Money Market Portfolio
        55291X109
        
          
        
        104213937.14400000
        NS
        USD
        104213937.14000000
        3.468465949889
        Long
        STIV
        RF
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        GFL Environmental Inc
        549300FYK4MBXWIVZU26
        GFL Environmental Inc
        36168Q104
        
          
        
        816890.00000000
        NS
        USD
        26581600.60000000
        0.884693344334
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Bridgebio Pharma Inc
        54930028YG89VTY2J114
        Bridgebio Pharma Inc
        10806X102
        
          
        
        299209.00000000
        NS
        USD
        17713172.80000000
        0.589532824566
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        BioAtla Inc
        N/A
        BioAtla Inc
        09077B104
        
          
        
        283359.00000000
        NS
        USD
        12198604.95000000
        0.405996041089
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Open Lending Corp
        N/A
        Open Lending Corp
        68373J104
        
          
        
        747616.00000000
        NS
        USD
        28843025.28000000
        0.959958464491
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        StealthGas Inc
        549300JCJUO3WBVVKJ89
        StealthGas Inc
        000000000
        
          
        
        1033327.00000000
        NS
        USD
        3130980.81000000
        0.104205834912
        Long
        EC
        CORP
        MH
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Endava PLC
        213800JJ6CRPCWCQVZ25
        Endava PLC
        29260V105
        
          
        
        339251.00000000
        NS
        USD
        34800367.58000000
        1.158231742388
        Long
        EC
        CORP
        GB
        N
        
        1
        
          N
          N
          N
        
      
      
        Industrial Logistics Properties Trust
        5493004XH9PJW009HR47
        Industrial Logistics Properties Trust
        456237106
        
          
        
        929145.00000000
        NS
        USD
        23284373.70000000
        0.774954478828
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        ACV Auctions Inc
        N/A
        ACV Auctions Inc
        00091G104
        
          
        
        1175596.00000000
        NS
        USD
        30471448.32000000
        1.014155916590
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Malibu Boats Inc
        N/A
        Malibu Boats Inc
        56117J100
        
          
        
        398622.00000000
        NS
        USD
        31259937.24000000
        1.040398538700
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Nuvei Corp
        N/A
        Nuvei Corp
        67079A102
        
          
        
        735894.00000000
        NS
        USD
        53352315.00000000
        1.775680806269
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Evo Payments Inc
        549300Z5UL344C8KEC55
        Evo Payments Inc
        26927E104
        
          
        
        1210383.00000000
        NS
        USD
        34665369.12000000
        1.153738700722
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Harmony Biosciences Holdings Inc
        N/A
        Harmony Biosciences Holdings Inc
        413197104
        
          
        
        453025.00000000
        NS
        USD
        14478679.00000000
        0.481881852745
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Figs Inc
        N/A
        Figs Inc
        30260D103
        
          
        
        266367.00000000
        NS
        USD
        9096433.05000000
        0.302749029210
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Silk Road Medical Inc
        549300VL8KC0ZPDQHE14
        Silk Road Medical Inc
        82710M100
        
          
        
        187403.00000000
        NS
        USD
        9104037.74000000
        0.303002129794
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Neurocrine Biosciences Inc
        549300FECER0XBN49756
        Neurocrine Biosciences Inc
        64125C109
        
          
        
        95139.00000000
        NS
        USD
        9154274.58000000
        0.304674120832
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        MorphoSys AG
        529900493806K77LRE72
        MorphoSys AG
        617760202
        
          
        
        446764.00000000
        NS
        USD
        9864549.12000000
        0.328313598667
        Long
        EC
        CORP
        DE
        N
        
        1
        
          N
          N
          N
        
      
      
        TPG Pace Tech Opportunities Corp
        N/A
        TPG Pace Tech Opportunities Corp
        000000000
        
          
        
        1575323.00000000
        NS
        USD
        15753230.00000000
        0.524301675527
        Long
        EC
        CORP
        KY
        
        N
        
        1
        
          N
          N
          N
        
      
      
        Prelude Therapeutics Inc
        N/A
        Prelude Therapeutics Inc
        74065P101
        
          
        
        251272.00000000
        NS
        USD
        8734214.72000000
        0.290693617252
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          
        
      
      
        HealthEquity Inc
        529900LRJU1RAFQHM467
        HealthEquity Inc
        42226A107
        
          
        
        361829.00000000
        NS
        USD
        30075226.48000000
        1.000968794039
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Kratos Defense & Security Solutions Inc
        5493000EKBN0UY1F3F88
        Kratos Defense & Security Solutions Inc
        50077B207
        
          
        
        504885.00000000
        NS
        USD
        12627173.85000000
        0.420259743984
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Silicon Laboratories Inc
        4PRDF8Q9TDHRVZKZSZ47
        Silicon Laboratories Inc
        826919102
        
          
        
        160516.00000000
        NS
        USD
        21920064.96000000
        0.729547323703
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CACI International Inc
        SYRPI2D1O9WRTS2WX210
        CACI International Inc
        127190304
        
          
        
        248616.00000000
        NS
        USD
        63387135.36000000
        2.109661401256
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Petco Health & Wellness Co Inc
        N/A
        Petco Health & Wellness Co Inc
        71601V105
        
          
        
        919432.00000000
        NS
        USD
        20825134.80000000
        0.693105672215
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Certara Inc
        N/A
        Certara Inc
        15687V109
        
          
        
        1495555.00000000
        NS
        USD
        39348052.05000000
        1.309588549049
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Rapid7 Inc
        549300GNVG5D60KEYN14
        Rapid7 Inc
        753422104
        
          
        
        671219.00000000
        NS
        USD
        56147469.35000000
        1.868709607922
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Asana Inc
        N/A
        Asana Inc
        04342Y104
        
          
        
        504878.00000000
        NS
        USD
        18569412.84000000
        0.618030350954
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Outset Medical Inc
        N/A
        Outset Medical Inc
        690145107
        
          
        
        271980.00000000
        NS
        USD
        13128474.60000000
        0.436944120659
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        TriNet Group Inc
        5299003FJVBETSFKE990
        TriNet Group Inc
        896288107
        
          
        
        353423.00000000
        NS
        USD
        26626888.82000000
        0.886200634561
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CoreSite Realty Corp
        549300H0YYORITFM2B74
        CoreSite Realty Corp
        21870Q105
        
          
        
        309726.00000000
        NS
        USD
        37554277.50000000
        1.249887839919
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        STAG Industrial Inc
        549300QWYX2W6FASVQ07
        STAG Industrial Inc
        85254J102
        
          
        
        1128179.00000000
        NS
        USD
        40287272.09000000
        1.340847829886
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        FTAC Olympus Acquisition Corp
        N/A
        FTAC Olympus Acquisition Corp
        000000000
        
          
        
        2573295.00000000
        NS
        USD
        25732950.00000000
        0.856448410977
        Long
        EC
        CORP
        KY
        
        N
        
        1
        
          N
          N
          
        
      
      
        Visteon Corp
        549300MOVLYHRW4GGW78
        Visteon Corp
        92839U206
        
          
        
        135948.00000000
        NS
        USD
        16648192.08000000
        0.554087955425
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Focus Financial Partners Inc
        5493006FFJCGLZ246V12
        Focus Financial Partners Inc
        34417P100
        
          
        
        980089.00000000
        NS
        USD
        49680711.41000000
        1.653481872202
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ritchie Bros Auctioneers Inc
        5493002H8U24DJXQ4886
        Ritchie Bros Auctioneers Inc
        767744105
        
          
        
        702267.00000000
        NS
        USD
        41932362.57000000
        1.395600010554
        Long
        EC
        CORP
        CA
        N
        
        1
        
          N
          N
          N
        
      
      
        Shoals Technologies Group Inc
        N/A
        Shoals Technologies Group Inc
        82489W107
        
          
        
        1031811.00000000
        NS
        USD
        28477983.60000000
        0.947809085318
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        TS Innovation Acquisitions Corp
        N/A
        TS Innovation Acquisitions Corp
        87284T100
        
          
        
        1920578.00000000
        NS
        USD
        20569390.38000000
        0.684593943007
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Thule Group AB
        549300XHHOGBOERKU333
        Thule Group AB
        000000000
        
          
        
        303197.00000000
        NS
        
        14210277.08000000
        0.472948854472
        Long
        EC
        CORP
        SE
        N
        
        1
        
          N
          N
          N
        
      
      
        Duckhorn Portfolio Inc/The
        N/A
        Duckhorn Portfolio Inc/The
        26414D106
        
          
        
        1447080.00000000
        NS
        USD
        26307914.40000000
        0.875584473758
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Amicus Therapeutics Inc
        549300MRD1SMUTNBPQ53
        Amicus Therapeutics Inc
        03152W109
        
          
        
        842470.00000000
        NS
        USD
        7801272.20000000
        0.259643265901
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        CryoPort Inc
        N/A
        CryoPort Inc
        229050307
        
          
        
        738179.00000000
        NS
        USD
        41278969.68000000
        1.373853677452
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        SpringWorks Therapeutics Inc
        N/A
        SpringWorks Therapeutics Inc
        85205L107
        
          
        
        260790.00000000
        NS
        USD
        21264816.60000000
        0.707739236534
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Hudson Executive Investment Corp
        N/A
        Hudson Executive Investment Corp
        443761101
        
          
        
        2480579.00000000
        NS
        USD
        24607343.68000000
        0.818985790323
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Q2 Holdings Inc
        549300M9RKR9DZXWS696
        Q2 Holdings Inc
        74736L109
        
          
        
        526519.00000000
        NS
        USD
        49982448.67000000
        1.663524342920
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Annexon Inc
        N/A
        Annexon Inc
        03589W102
        
          
        
        487334.00000000
        NS
        USD
        10292494.08000000
        0.342556535484
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ping Identity Holding Corp
        N/A
        Ping Identity Holding Corp
        72341T103
        
          
        
        1015157.00000000
        NS
        USD
        24475435.27000000
        0.814595592225
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Ingevity Corp
        5493009UTFC4B5IMGF87
        Ingevity Corp
        45688C107
        
          
        
        428949.00000000
        NS
        USD
        35306792.19000000
        1.175086652242
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Maravai LifeSciences Holdings Inc
        N/A
        Maravai LifeSciences Holdings Inc
        56600D107
        
          
        
        885618.00000000
        NS
        USD
        33246099.72000000
        1.106502335580
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          N
        
      
      
        Optinose Inc
        549300CPBME7Z3CYMN16
        Optinose Inc
        68404V100
        
          
        
        1169386.00000000
        NS
        USD
        3730341.34000000
        0.124153853835
        Long
        EC
        CORP
        US
        N
        
        1
        
          N
          N
          
        
      
    
    
      
    
    
      2021-06-29
      MFS SERIES TRUST I
      Kasey Phillips
      Kasey Phillips
      Assistant Treasurer
    
  
  XXXX
Quarterly Report
May 31, 2021
MFS®  New Discovery Fund
NDF-Q3
Portfolio of Investments
5/31/21 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
Common Stocks – 96.7%
Aerospace & Defense – 2.5%  
CACI International, Inc., “A” (a)   248,616 $63,387,135
Kratos Defense & Security Solutions, Inc. (a)   504,885 12,627,174
        $76,014,309
Airlines – 1.3%  
JetBlue Airways Corp. (a)   1,954,568 $39,286,817
Apparel Manufacturers – 1.6%  
FIGS, Inc. (a)   266,367 $9,096,433
Skechers USA, Inc., “A” (a)   838,641 39,835,447
        $48,931,880
Automotive – 0.6%  
Visteon Corp. (a)   135,948 $16,648,192
Biotechnology – 5.6%  
Abcam PLC (a)   1,245,796 $25,061,831
Adaptive Biotechnologies Corp. (a)   335,540 12,686,767
AlloVir, Inc. (a)   404,016 9,470,135
Amicus Therapeutics, Inc. (a)   842,470 7,801,272
Berkeley Lights, Inc. (a)   256,034 11,137,479
BioAtla, Inc. (a)   283,359 12,198,605
BioXcel Therapeutics, Inc. (a)   189,484 6,258,656
BridgeBio Pharma, Inc. (a)   299,209 17,713,173
Immunocore Holdings PLC, ADR (a)   65,377 2,680,457
Morphosys AG, ADR (a)   446,764 9,864,549
Neurocrine Biosciences, Inc. (a)   95,139 9,154,275
Olink Holding AB (a)   326,453 11,533,584
Prelude Therapeutics, Inc. (a)(l)   251,272 8,734,215
Recursion Pharmaceuticals, Inc. (a)   654,933 17,264,034
Sana Biotechnology, Inc. (a)   326,615 6,849,117
        $168,408,149
Brokerage & Asset Managers – 4.9%  
Focus Financial Partners, “A” (a)   980,089 $49,680,712
GCM Grosvenor, Inc. (l)   827,478 9,888,362
GCM Grosvenor, Inc. (PIPE) (a)(zz)   1,262,527 15,087,198
Hamilton Lane, Inc., “A”   232,551 21,015,634
TMX Group Ltd.   151,326 16,634,576
WisdomTree Investments, Inc.   5,320,259 35,645,735
        $147,952,217
Business Services – 11.3%  
Endava PLC, ADR (a)   339,251 $34,800,368
EVO Payments, Inc., “A” (a)   1,215,149 34,801,867
ExlService Holdings, Inc. (a)   422,303 43,066,460
Keywords Studios PLC (a)   1,043,937 38,739,149
Nuvei Corp. (a)   735,894 55,103,743
Stamps.com, Inc. (a)   180,330 33,844,334
Syneos Health, Inc. (a)   358,555 31,516,984
TriNet Group, Inc. (a)   353,423 26,626,889
WNS (Holdings) Ltd., ADR (a)   553,724 41,252,438
        $339,752,232
Chemicals – 1.2%  
Ingevity Corp. (a)   428,949 $35,306,792
1
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Computer Software – 10.4%  
8x8, Inc. (a)   956,439 $22,524,138
Alkami Technology, Inc. (a)   305,249 10,155,634
Asana, Inc. (a)   504,878 18,569,413
Avalara, Inc. (a)   85,444 11,293,134
DoubleVerify Holdings, Inc. (a)   694,187 25,608,558
Everbridge, Inc. (a)   324,641 38,145,318
nCino, Inc. (a)   331,280 20,247,834
Open Lending Corp., “A” (a)   747,616 28,843,025
Pagerduty, Inc. (a)   654,633 26,610,831
Paylocity Holding Corp. (a)   128,901 21,891,257
Ping Identity Holding Corp. (a)   1,015,157 24,475,435
Procore Technologies, Inc. (a)   183,245 15,836,033
VERTEX, Inc. (a)(h)   1,719,056 33,023,066
Zendesk, Inc. (a)   107,548 14,697,510
        $311,921,186
Computer Software - Systems – 3.5%  
Q2 Holdings, Inc. (a)   526,519 $49,982,449
Rapid7, Inc. (a)   671,219 56,147,469
        $106,129,918
Construction – 2.6%  
AZEK Co. LLC (a)   802,916 $34,950,934
Trex Co., Inc. (a)   215,903 21,031,111
TS Innovation Acquisitions Corp. (SPAC) (a)(h)   1,920,578 20,569,390
        $76,551,435
Consumer Services – 1.2%  
Boyd Group Services, Inc.   101,496 $17,416,613
Bright Horizons Family Solutions, Inc. (a)   128,518 17,765,043
        $35,181,656
Containers – 1.3%  
Gerresheimer AG   339,958 $37,622,437
Electrical Equipment – 3.5%  
Advanced Drainage Systems, Inc.   142,454 $16,157,133
Generac Holdings, Inc. (a)   111,174 36,545,117
Littlefuse, Inc.   54,509 14,239,931
Sensata Technologies Holding PLC (a)   654,379 38,889,744
        $105,831,925
Electronics – 2.2%  
Advanced Energy Industries, Inc.   445,913 $45,487,585
Silicon Laboratories, Inc. (a)   160,516 21,920,065
        $67,407,650
Entertainment – 1.0%  
Manchester United PLC, “A”   1,836,015 $28,696,914
Food & Beverages – 2.1%  
Duckhorn Portfolio, Inc. (a)   1,447,080 $26,307,914
Laird Superfood, Inc. (a)(l)   172,873 5,649,490
Oatly Group AB (a)   1,270,869 30,132,304
        $62,089,708
Gaming & Lodging – 0.6%  
Penn National Gaming, Inc. (a)   222,144 $18,209,144
2
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
General Merchandise – 0.4%  
Ollie's Bargain Outlet Holdings, Inc. (a)   147,375 $12,739,095
Insurance – 0.7%  
Metromile, Inc. (a)(l)   2,459,541 $20,856,908
Leisure & Toys – 1.5%  
Malibu Boats, Inc., “A” (a)   398,622 $31,259,937
Thule Group AB   303,197 14,264,394
        $45,524,331
Machinery & Tools – 1.4%  
Ritchie Bros. Auctioneers, Inc.   702,267 $41,932,363
Medical & Health Technology & Services – 6.2%  
Certara, Inc. (a)   1,495,555 $39,348,052
Charles River Laboratories International, Inc. (a)   98,411 33,261,934
Guardant Health, Inc. (a)   98,282 12,198,762
Health Catalyst, Inc. (a)   234,097 12,568,668
HealthEquity, Inc. (a)   361,829 30,075,227
ICON PLC (a)   165,178 36,960,229
PRA Health Sciences, Inc. (a)   134,185 22,934,900
        $187,347,772
Medical Equipment – 3.5%  
Acutus Medical, Inc. (a)   754,198 $12,270,801
Maravai Lifesciences Holdings, Inc., “A” (a)   885,618 33,246,100
Nevro Corp. (a)   129,502 19,515,951
OptiNose, Inc. (a)(l)   1,169,386 3,730,341
Outset Medical, Inc. (a)   271,980 13,128,475
PerkinElmer, Inc.   102,257 14,834,423
Silk Road Medical, Inc. (a)   187,403 9,104,038
        $105,830,129
Network & Telecom – 3.0%  
CoreSite Realty Corp., REIT   309,726 $37,554,277
QTS Realty Trust, Inc., REIT, “A”   850,962 53,933,972
        $91,488,249
Other Banks & Diversified Financials – 4.8%  
Bank OZK   329,168 $14,058,765
FTAC Olympus Acquisition Corp. (SPAC) (a)(l)   2,573,295 25,732,950
Genius Sports Ltd. (SPAC) (a)(l)   1,701,164 40,998,052
Hudson Executive Investment Corp., “A”(SPAC) (a)(h)   2,480,579 24,607,344
Prosperity Bancshares, Inc.   309,180 23,265,795
TPG Pace Tech Opportunities Corp. (SPAC) (a)   1,575,323 15,753,230
        $144,416,136
Pharmaceuticals – 2.4%  
Annexon, Inc. (a)   487,334 $10,292,494
Collegium Pharmaceutical, Inc. (a)   511,358 12,216,343
Harmony Biosciences Holdings (a)   453,025 14,478,679
Orchard RX Ltd., ADR (a)   329,462 1,723,086
SpringWorks Therapeutics, Inc. (a)   260,790 21,264,817
Turning Point Therapeutics, Inc. (a)   192,279 12,725,024
        $72,700,443
Pollution Control – 0.9%  
GFL Environmental, Inc.   816,890 $26,581,601
3
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Railroad & Shipping – 0.1%  
StealthGas, Inc. (a)   1,033,327 $3,130,981
Real Estate – 2.9%  
Big Yellow Group PLC, REIT   1,284,237 $23,864,675
Industrial Logistics Properties Trust, REIT   929,145 23,284,374
STAG Industrial, Inc., REIT   1,128,179 40,287,272
        $87,436,321
Specialty Chemicals – 1.2%  
Axalta Coating Systems Ltd. (a)   1,110,619 $36,028,480
Specialty Stores – 5.0%  
ACV Auctions, Inc. (a)(h)   1,175,596 $30,471,448
Leslie's, Inc. (a)   1,868,596 54,488,259
Petco Health & Wellness Co., Inc. (a)   919,432 20,825,135
ThredUp, Inc. (a)(h)   975,825 23,019,712
Vroom, Inc. (a)   510,647 22,575,704
        $151,380,258
Trucking – 3.3%  
CryoPort, Inc. (a)   738,179 $41,278,969
Knight-Swift Transportation Holdings, Inc.   706,304 33,711,890
Schneider National, Inc.   973,214 23,834,011
        $98,824,870
Utilities - Electric Power – 2.0%  
Array Technologies, Inc. (a)   1,883,937 $30,708,173
Shoals Technologies Group, Inc. (a)   1,031,811 28,477,984
        $59,186,157
Total Common Stocks   $2,907,346,655
Investment Companies (h) – 3.5%
Money Market Funds – 3.5%  
MFS Institutional Money Market Portfolio, 0.03% (v)     104,217,149 $104,217,149
Collateral for Securities Loaned – 1.3%
State Street Navigator Securities Lending Government Money Market Portfolio, 0.01% (j)     40,886,832 $40,886,832
 
Other Assets, Less Liabilities – (1.5)%   (45,418,756)
Net Assets – 100.0% $3,007,031,880
(a) Non-income producing security.      
(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $235,908,109 and $2,816,542,527, respectively.      
(j) The rate quoted is the annualized seven-day yield of the fund at period end.      
(l) A portion of this security is on loan. See Note 2 for additional information.      
(v) Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.      
(zz) Securities subject to a restriction on resale.      
The following abbreviations are used in this report and are defined:
ADR American Depositary Receipt
PIPE Private Investment in Public Equity
REIT Real Estate Investment Trust
SPAC Special Purpose Acquisition Company
See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.
4
Supplemental Information
5/31/21 (unaudited)
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(1) Investment Valuations
Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund’s valuation policies and procedures, market quotations are not considered to be readily available for most types of debt instruments and floating rate loans and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of May 31, 2021 in valuing the fund's assets or liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Equity Securities:        
United States $2,383,397,417 $15,087,198 $— $2,398,484,615
United Kingdom 196,564,532 — — 196,564,532
Canada 157,668,896 — — 157,668,896
Germany 47,486,986 — — 47,486,986
India 41,252,438 — — 41,252,438
Ireland 36,960,229 — — 36,960,229
Sweden 25,797,978 — — 25,797,978
Greece 3,130,981 — — 3,130,981
Mutual Funds 145,103,981 — — 145,103,981
Total $3,037,363,438 $15,087,198 $— $3,052,450,636
For further information regarding security characteristics, see the Portfolio of Investments.
The following is a reconciliation of level 3 assets for which significant unobservable inputs were used to determine fair value. The table
5
Supplemental Information (unaudited) – continued
presents the activity of level 3 securities held at the beginning and the end of the period.
  Equity
Securities
Balance as of 8/31/20 $11,970,842
Change in unrealized appreciation or depreciation 3,116,356
Transfers out of level 3 (15,087,198)
Balance as of 5/31/21 $—
(2) Securities Lending Collateral
At May 31, 2021, the value of securities loaned was $39,703,439. These loans were collateralized by cash of $40,886,832 and U.S. Treasury Obligations (held by the lending agent) of $597,614.
(3) Investments in Affiliated Issuers
An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:
Affiliated Issuers Beginning
Value 		Purchases Sales
Proceeds 		Realized
Gain
(Loss) 		Change in
Unrealized
Appreciation or
Depreciation 		Ending
Value
ACV Auctions, Inc. $— $33,376,502 $— $— $(2,905,054) $30,471,448
Hudson Executive Investment Corp., “A” (SPAC) — 25,687,763 — — (1,080,419) 24,607,344
MFS Institutional Money Market Portfolio 94,206,717 814,496,797 804,486,365 — — 104,217,149
ThredUp, Inc. — 15,980,943 — — 7,038,769 23,019,712
TS Innovation Acquisitions Corp. (SPAC) — 29,546,138 — — (8,976,748) 20,569,390
VERTEX, Inc. 20,972,183 24,262,874 5,985,508 858,636 (7,085,119) 33,023,066
  $115,178,900 $943,351,017 $810,471,873 $858,636 $(13,008,571) $235,908,109
Affiliated Issuers Dividend
Income 		Capital Gain
Distributions
ACV Auctions, Inc. $— $—
Hudson Executive Investment Corp., “A” (SPAC) — —
MFS Institutional Money Market Portfolio 58,786 —
ThredUp, Inc. — —
TS Innovation Acquisitions Corp. (SPAC) — —
VERTEX, Inc. — —
  $58,786 $—
(4) Impacts of COVID-19
The pandemic related to the global spread of novel coronavirus disease (COVID-19), which was first detected in December 2019, has resulted in significant disruptions to global business activity and the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the securities and commodities markets in general. Multiple surges in cases globally, the availability and widespread adoption of vaccines, and the emergence of variant strains of the virus continue to create uncertainty as to the future and long-term impacts resulting from the pandemic including impacts to the prices and liquidity of the fund's investments and the fund's performance.
6

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