NPORT-P false 0000076721 XXXXXXXX S000015763 C000043241 C000043242 C000128848 IMPAX FUNDS SERIES TRUST I 811-02064 0000076721 549300TD5R23SWU72456 30 Penhallow St. Suite 400 Portsmouth 03801 800-767-1729 Impax US Sustainable Economy Fund S000015763 5493001FQOFD3O7VGQ38 2023-12-31 2023-06-30 N 278465989.44 138438.18 278327551.26 0 0 0 0 0 0 0 0 0 0 0 0 0 0 UST ABBVIE INC N/A 00287Y109 20871 NS USD 2811949.83 1.010302363985 Long EC CORP US N 1 N N N ACCENTURE PLC CL A N/A G1151C101 5882 NS USD 1815067.56 0.652133628806 Long EC CORP IE N 1 N N N ACUITY BRANDS INC N/A 00508Y102 3642 NS USD 593937.36 0.213395101315 Long EC CORP US N 1 N N N ADOBE INC N/A 00724F101 1442 NS USD 705123.58 0.253343076101 Long EC CORP US N 1 N N N AFFILIATED MANAGERS GROUP N/A 008252108 3860 NS USD 578575.4 0.20787571959 Long EC CORP US N 1 N N N AFLAC INC N/A 001055102 9787 NS USD 683132.6 0.245441961066 Long EC CORP US N 1 N N N AGILENT TECHNOLOGIES INC N/A 00846U101 17916 NS USD 2154399 0.774051648946 Long EC CORP US N 1 N N N ALEXANDRIA REAL ESTATE EQUIT N/A 015271109 6721 NS USD 762766.29 0.274053462026 Long RE RF US N 1 N N N ALLSTATE CORP N/A 020002101 29129 NS USD 3176226.16 1.141182806237 Long EC CORP US N 1 N N N ALPHABET INC CL A N/A 02079K305 67023 NS USD 8022653.1 2.882450215108 Long EC CORP US N 1 N N N ALPHABET INC CL C N/A 02079K107 26036 NS USD 3149574.92 1.131607311508 Long EC CORP US N 1 N N N AMCOR PLC N/A G0250X107 43757 NS USD 436694.86 0.156899616306 Long EC CORP GB N 1 N N N AMERICAN WATER WORKS CO INC N/A 030420103 24210 NS USD 3455977.5 1.241694357729 Long EC CORP US N 1 N N N AMERIPRISE FINANCIAL INC N/A 03076C106 4714 NS USD 1565802.24 0.562575365935 Long EC CORP US N 1 N N N AMGEN INC N/A 031162100 7539 NS USD 1673808.78 0.601380916989 Long EC CORP US N 1 N N N ANALOG DEVICES INC N/A 032654105 12785 NS USD 2490645.85 0.894861410135 Long EC CORP US N 1 N N N ANSYS INC N/A 03662Q105 8282 NS USD 2735296.14 0.98276154395 Long EC CORP US N 1 N N N APPLE INC N/A 037833100 68887 NS USD 13362011.39 4.800822386972 Long EC CORP US N 1 N N N APPLIED MATERIALS INC N/A 038222105 18444 NS USD 2665895.76 0.957826757693 Long EC CORP US N 1 N N N APTIV PLC N/A G6095L109 5697 NS USD 581606.73 0.208964842815 Long EC CORP IE N 1 N N N AUTODESK INC N/A 052769106 5664 NS USD 1158911.04 0.416383873876 Long EC CORP US N 1 N N N AUTOMATIC DATA PROCESSING N/A 053015103 5699 NS USD 1252583.21 0.450039244886 Long EC CORP US N 1 N N N AVALONBAY COMMUNITIES INC N/A 053484101 5598 NS USD 1059533.46 0.380678612377 Long RE RF US N 1 N N N AVANGRID INC N/A 05351W103 43688 NS USD 1646163.84 0.591448396879 Long EC CORP US N 1 N N N AXALTA COATING SYSTEMS LTD N/A G0750C108 16439 NS USD 539363.59 0.193787351471 Long EC CORP US N 1 N N N BANK OF NEW YORK MELLON CORP N/A 064058100 42323 NS USD 1884219.96 0.676979318601 Long EC CORP US N 1 N N N BATH + BODY WORKS INC N/A 070830104 47054 NS USD 1764525 0.633974247972 Long EC CORP US N 1 N N N BEST BUY CO INC N/A 086516101 14790 NS USD 1212040.5 0.435472699168 Long EC CORP US N 1 N N N BIO RAD LABORATORIES A N/A 090572207 1879 NS USD 712366.48 0.255945369682 Long EC CORP US N 1 N N N BOOZ ALLEN HAMILTON HOLDINGS N/A 099502106 4876 NS USD 544161.6 0.19551122321 Long EC CORP US N 1 N N N BOSTON PROPERTIES INC N/A 101121101 7807 NS USD 449605.13 0.161538133025 Long RE RF US N 1 N N N BRISTOL MYERS SQUIBB CO N/A 110122108 59988 NS USD 3836232.6 1.378315794693 Long EC CORP US N 1 N N N C.H. ROBINSON WORLDWIDE INC N/A 12541W209 7935 NS USD 748667.25 0.26898783344 Long EC CORP US N 1 N N N CADENCE DESIGN SYS INC N/A 127387108 7361 NS USD 1726301.72 0.62024104771 Long EC CORP US N 1 N N N CARRIER GLOBAL CORP N/A 14448C104 34615 NS USD 1720711.65 0.618232597603 Long EC CORP US N 1 N N N CBRE GROUP INC A N/A 12504L109 39853 NS USD 3216535.63 1.155665551412 Long EC CORP US N 1 N N N CELANESE CORP N/A 150870103 3773 NS USD 436913.4 0.156978135302 Long EC CORP US N 1 N N N CHARLES RIVER LABORATORIES N/A 159864107 2023 NS USD 425335.75 0.152818414158 Long EC CORP US N 1 N N N CHEMOURS CO/THE N/A 163851108 22174 NS USD 817998.86 0.293897911399 Long EC CORP US N 1 N N N CISCO SYSTEMS INC N/A 17275R102 29758 NS USD 1539678.92 0.553189547003 Long EC CORP US N 1 N N N CLOROX COMPANY N/A 189054109 3670 NS USD 583676.8 0.20970859599 Long EC CORP US N 1 N N N COGNEX CORP N/A 192422103 10884 NS USD 609721.68 0.219066232301 Long EC CORP US N 1 N N N COLGATE PALMOLIVE CO N/A 194162103 13965 NS USD 1075863.6 0.38654585043 Long EC CORP US N 1 N N N CSX CORP N/A 126408103 16049 NS USD 547270.9 0.19662836019 Long EC CORP US N 1 N N N CVS HEALTH CORP N/A 126650100 11847 NS USD 818983.11 0.294251541499 Long EC CORP US N 1 N N N DENTSPLY SIRONA INC N/A 24906P109 16883 NS USD 675657.66 0.242756298089 Long EC CORP US N 1 N N N DOVER CORP N/A 260003108 6457 NS USD 953376.05 0.342537433209 Long EC CORP US N 1 N N N ECOLAB INC N/A 278865100 23808 NS USD 4444715.52 1.596936954275 Long EC CORP US N 1 N N N EDISON INTERNATIONAL N/A 281020107 45823 NS USD 3182407.35 1.143403639199 Long EC CORP US N 1 N N N ELECTRONIC ARTS INC N/A 285512109 4061 NS USD 526711.7 0.189241667817 Long EC CORP US N 1 N N N ELEVANCE HEALTH INC N/A 036752103 10672 NS USD 4741462.88 1.703554987113 Long EC CORP US N 1 N N N ELI LILLY + CO N/A 532457108 12274 NS USD 5756260.52 2.068160515889 Long EC CORP US N 1 N N N EMERSON ELECTRIC CO N/A 291011104 17588 NS USD 1589779.32 0.571190064657 Long EC CORP US N 1 N N N ENCOMPASS HEALTH CORP N/A 29261A100 6985 NS USD 472954.35 0.169927248617 Long EC CORP US N 1 N N N EQUINIX INC N/A 29444U700 3249 NS USD 2547021.06 0.915116397378 Long RE RF US N 1 N N N ESTEE LAUDER COMPANIES CL A N/A 518439104 2392 NS USD 469740.96 0.168772713256 Long EC CORP US N 1 N N N EXPEDITORS INTL WASH INC N/A 302130109 3495 NS USD 423349.35 0.152104722685 Long EC CORP US N 1 N N N FIRST AMERICAN FINANCIAL N/A 31847R102 7157 NS USD 408092.14 0.146622976472 Long EC CORP US N 1 N N N FIRST SOLAR INC N/A 336433107 2883 NS USD 548029.47 0.196900905972 Long EC CORP US N 1 N N N FLOWSERVE CORP N/A 34354P105 11132 NS USD 413553.8 0.148585290291 Long EC CORP US N 1 N N N GARTNER INC N/A 366651107 1940 NS USD 679601.4 0.244173240099 Long EC CORP US N 1 N N N GEN DIGITAL INC N/A 668771108 60448 NS USD 1121310.4 0.402874381255 Long EC CORP US N 1 N N N GENERAL MILLS INC N/A 370334104 37717 NS USD 2892893.9 1.039384669934 Long EC CORP US N 1 N N N GRAND CANYON EDUCATION INC N/A 38526M106 13505 NS USD 1393851.05 0.500795211861 Long EC CORP US N 1 N N N GXO LOGISTICS INC N/A 36262G101 7604 NS USD 477683.28 0.17162630068 Long EC CORP US N 1 N N N HARLEY DAVIDSON INC N/A 412822108 12203 NS USD 429667.63 0.154374810562 Long EC CORP US N 1 N N N HARTFORD FINANCIAL SVCS GRP N/A 416515104 18116 NS USD 1304714.32 0.468769374104 Long EC CORP US N 1 N N N HASBRO INC N/A 418056107 7389 NS USD 478585.53 0.171950469091 Long EC CORP US N 1 N N N HEALTHPEAK PROPERTIES INC N/A 42250P103 48186 NS USD 968538.6 0.347985169134 Long RE RF US N 1 N N N HERSHEY CO/THE N/A 427866108 1600 NS USD 399520 0.143543101713 Long EC CORP US N 1 N N N HOLOGIC INC N/A 436440101 6546 NS USD 530029.62 0.190433759648 Long EC CORP US N 1 N N N HOME DEPOT INC N/A 437076102 5205 NS USD 1616881.2 0.580927469336 Long EC CORP US N 1 N N N HP INC N/A 40434L105 43759 NS USD 1343838.89 0.48282639786 Long EC CORP US N 1 N N N HUBSPOT INC N/A 443573100 4777 NS USD 2541793.93 0.913238347585 Long EC CORP US N 1 N N N HUMANA INC N/A 444859102 1140 NS USD 509728.2 0.183139684768 Long EC CORP US N 1 N N N IDEXX LABORATORIES INC N/A 45168D104 1064 NS USD 534372.72 0.191994187274 Long EC CORP US N 1 N N N ILLINOIS TOOL WORKS N/A 452308109 2140 NS USD 535342.4 0.192342582535 Long EC CORP US N 1 N N N ILLUMINA INC N/A 452327109 6543 NS USD 1226747.07 0.44075660654 Long EC CORP US N 1 N N N INGERSOLL RAND INC N/A 45687V106 17300 NS USD 1130728 0.406258020408 Long EC CORP US N 1 N N N INTEL CORP N/A 458140100 53622 NS USD 1793119.68 0.644247999123 Long EC CORP US N 1 N N N INTERPUBLIC GROUP OF COS INC N/A 460690100 22208 NS USD 856784.64 0.307833211668 Long EC CORP US N 1 N N N INTL BUSINESS MACHINES CORP N/A 459200101 10567 NS USD 1413970.27 0.508023824303 Long EC CORP US N 1 N N N INTL FLAVORS + FRAGRANCES N/A 459506101 17051 NS USD 1357089.09 0.487587047655 Long EC CORP US N 1 N N N INTUIT INC N/A 461202103 1801 NS USD 825200.19 0.29648526934 Long EC CORP US N 1 N N N INTUITIVE SURGICAL INC N/A 46120E602 1653 NS USD 565226.82 0.203079722953 Long EC CORP US N 1 N N N JM SMUCKER CO/THE N/A 832696405 4345 NS USD 641626.15 0.230529154263 Long EC CORP US N 1 N N N JOHNSON + JOHNSON N/A 478160104 32236 NS USD 5335702.72 1.917058766135 Long EC CORP US N 1 N N N JOHNSON CONTROLS INTERNATION N/A G51502105 24558 NS USD 1673382.12 0.601227622786 Long EC CORP US N 1 N N N KEYSIGHT TECHNOLOGIES IN N/A 49338L103 8093 NS USD 1355172.85 0.486898563892 Long EC CORP US N 1 N N N KIMBERLY CLARK CORP N/A 494368103 15616 NS USD 2155944.96 0.774607095216 Long EC CORP US N 1 N N N KROGER CO N/A 501044101 51105 NS USD 2401935 0.862988586335 Long EC CORP US N 1 N N N LAM RESEARCH CORP N/A 512807108 7460 NS USD 4795735.6 1.723054573034 Long EC CORP US N 1 N N N LEAR CORP N/A 521865204 3234 NS USD 464240.7 0.166796530885 Long EC CORP US N 1 N N N LENNOX INTERNATIONAL INC N/A 526107107 1999 NS USD 651813.93 0.234189510542 Long EC CORP US N 1 N N N LINDE PLC N/A G54950103 8165 NS USD 3111518.2 1.117933954405 Long EC CORP US N 1 N N N LOWE S COS INC N/A 548661107 5521 NS USD 1246089.7 0.447706198815 Long EC CORP US N 1 N N N LUMENTUM HOLDINGS INC N/A 55024U109 7304 NS USD 414355.92 0.148873483104 Long EC CORP US N 1 N MARKETAXESS HOLDINGS INC N/A 57060D108 1686 NS USD 440754.12 0.15835806337 Long EC CORP US N 1 N N N MARTIN MARIETTA MATERIALS N/A 573284106 1482 NS USD 684224.58 0.24583429736 Long EC CORP US N 1 N N N MASTERCARD INC A N/A 57636Q104 9770 NS USD 3842541 1.380582332796 Long EC CORP US N 1 N N N MERCK + CO. INC. N/A 58933Y105 30894 NS USD 3564858.66 1.280814150041 Long EC CORP US N 1 N N N METLIFE INC N/A 59156R108 59529 NS USD 3365174.37 1.209069800947 Long EC CORP US N 1 N N N METTLER TOLEDO INTERNATIONAL N/A 592688105 2585 NS USD 3390589.4 1.218201139144 Long EC CORP US N 1 N N N MGM RESORTS INTERNATIONAL N/A 552953101 12156 NS USD 533891.52 0.191821297454 Long EC CORP US N 1 N N N MICROSOFT CORP N/A 594918104 46381 NS USD 15794585.74 5.674819351695 Long EC CORP US N 1 N N N NORFOLK SOUTHERN CORP N/A 655844108 16299 NS USD 3695961.24 1.327917851922 Long EC CORP US N 1 N N N NVENT ELECTRIC PLC N/A G6700G107 13924 NS USD 719453.08 0.258491506408 Long EC CORP GB N 1 N N N NVIDIA CORP N/A 67066G104 25485 NS USD 10780664.7 3.873373171716 Long EC CORP US N 1 N N N NVR INC N/A 62944T105 111 NS USD 704918.82 0.253269508106 Long EC CORP US N 1 N N N OTIS WORLDWIDE CORP N/A 68902V107 14180 NS USD 1262161.8 0.45348072596 Long EC CORP US N 1 N N N OWENS CORNING N/A 690742101 3860 NS USD 503730 0.180984598082 Long EC CORP US N 1 N N N PALO ALTO NETWORKS INC N/A 697435105 2037 NS USD 520473.87 0.187000484732 Long EC CORP US N 1 N N N PAYPAL HOLDINGS INC N/A 70450Y103 9112 NS USD 608043.76 0.218463374268 Long EC CORP US N 1 N N N PLANET FITNESS INC CL A N/A 72703H101 31306 NS USD 2111276.64 0.758558263615 Long EC CORP US N 1 N N N PNC FINANCIAL SERVICES GROUP N/A 693475105 3497 NS USD 440447.15 0.158247772456 Long EC CORP US N 1 N N N PPG INDUSTRIES INC N/A 693506107 8148 NS USD 1208348.4 0.434146168617 Long EC CORP US N 1 N N N PROCTER + GAMBLE CO/THE N/A 742718109 18030 NS USD 2735872.2 0.982968515914 Long EC CORP US N 1 N N N PROGRESSIVE CORP N/A 743315103 10437 NS USD 1381545.69 0.496374032591 Long EC CORP US N 1 N N N PROLOGIS INC N/A 74340W103 18957 NS USD 2324696.91 0.835237797867 Long RE RF US N 1 N N N PRUDENTIAL FINANCIAL INC N/A 744320102 5335 NS USD 470653.7 0.169100650607 Long EC CORP US N 1 N N N QUALCOMM INC N/A 747525103 28094 NS USD 3344309.76 1.201573378151 Long EC CORP US N 1 N N N REGAL REXNORD CORP N/A 758750103 3668 NS USD 564505.2 0.202820452896 Long EC CORP US N 1 N N N REGIONS FINANCIAL CORP N/A 7591EP100 25221 NS USD 449438.22 0.161478164115 Long EC CORP US N 1 N N N REPUBLIC SERVICES INC N/A 760759100 29006 NS USD 4442849.02 1.596266341541 Long EC CORP US N 1 N N N ROCKWELL AUTOMATION INC N/A 773903109 4845 NS USD 1596185.25 0.573491644206 Long EC CORP US N 1 N N N SALESFORCE INC N/A 79466L302 7993 NS USD 1688601.18 0.606695662127 Long EC CORP US N 1 N N N SERVICENOW INC N/A 81762P102 4009 NS USD 2252937.73 0.80945552095 Long EC CORP US N 1 N N N SHERWIN WILLIAMS CO/THE N/A 824348106 2216 NS USD 588392.32 0.211402829988 Long EC CORP US N 1 N N N SMITH (A.O.) CORP N/A 831865209 7770 NS USD 565500.6 0.203178089068 Long EC CORP US N 1 N N N SPLUNK INC N/A 848637104 4369 NS USD 463507.21 0.166532996069 Long EC CORP US N 1 N N N SSC GOVERNMENT MM GVMXX N/A 7839989D1 2507784.3 NS USD 2507784.3 0.901019065 Long STIV CORP US N 1 N N N SYNCHRONY FINANCIAL N/A 87165B103 13065 NS USD 443164.8 0.159224193938 Long EC CORP US N 1 N N N SYNOPSYS INC N/A 871607107 4705 NS USD 2048604.05 0.736040697633 Long EC CORP US N 1 N N N TAKE TWO INTERACTIVE SOFTWRE N/A 874054109 5519 NS USD 812176.04 0.2918058368 Long EC CORP US N 1 N N N TEXAS INSTRUMENTS INC N/A 882508104 26744 NS USD 4814454.88 1.729780202572 Long EC CORP US N 1 N N N TRACTOR SUPPLY COMPANY N/A 892356106 3122 NS USD 690274.2 0.248007858681 Long EC CORP US N 1 N N N TRANE TECHNOLOGIES PLC N/A G8994E103 8131 NS USD 1555135.06 0.558742766557 Long EC CORP IE N 1 N N N TRIMBLE INC N/A 896239100 8244 NS USD 436437.36 0.156807099414 Long EC CORP US N 1 N N N UNITED PARCEL SERVICE CL B N/A 911312106 12394 NS USD 2221624.5 0.798205024958 Long EC CORP US N 1 N N N UNIVERSAL DISPLAY CORP N/A 91347P105 4694 NS USD 676546.22 0.243075547835 Long EC CORP US N 1 N N N VAIL RESORTS INC N/A 91879Q109 1963 NS USD 494204.88 0.177562328186 Long EC CORP US N 1 N N N VENTAS INC N/A 92276F100 52314 NS USD 2472882.78 0.888479336237 Long RE RF US N 1 N N N VERIZON COMMUNICATIONS INC N/A 92343V104 88773 NS USD 3301467.87 1.186180762578 Long EC CORP US N 1 N N N VISA INC CLASS A SHARES N/A 92826C839 6750 NS USD 1602990 0.575936515355 Long EC CORP US N 1 N N N VMWARE INC CLASS A W/I N/A 928563402 6628 NS USD 952377.32 0.342178600605 Long EC CORP US N 1 N N N WALGREENS BOOTS ALLIANCE INC N/A 931427108 13070 NS USD 372364.3 0.133786360105 Long EC CORP US N 1 N N N WARNER BROS DISCOVERY INC N/A 934423104 47635 NS USD 597342.9 0.214618674039 Long EC CORP US N 1 N N N WASTE MANAGEMENT INC N/A 94106L109 23648 NS USD 4101036.16 1.473456774737 Long EC CORP US N 1 N N N WATERS CORP N/A 941848103 2334 NS USD 622104.36 0.223515191789 Long EC CORP US N 1 N N N WELLTOWER INC N/A 95040Q104 14084 NS USD 1139254.76 0.409321590638 Long RE RF US N 1 N N N WESCO INTERNATIONAL INC N/A 95082P105 3942 NS USD 705854.52 0.253605694731 Long EC CORP US N 1 N N N WEST PHARMACEUTICAL SERVICES N/A 955306105 1186 NS USD 453609.42 0.162976829978 Long EC CORP US N 1 N N N WESTROCK CO N/A 96145D105 22240 NS USD 646516.8 0.232286310526 Long EC CORP US N 1 N N N WHIRLPOOL CORP N/A 963320106 3038 NS USD 452024.02 0.162407213355 Long EC CORP US N 1 N N N WILLIAMS SONOMA INC N/A 969904101 3686 NS USD 461266.04 0.165727768563 Long EC CORP US N 1 N N N WW GRAINGER INC N/A 384802104 755 NS USD 595385.45 0.21391538398 Long EC CORP US N 1 N N N ZOETIS INC N/A 98978V103 22564 NS USD 3885746.44 1.396105567849 Long EC CORP US N 1 N N N 2023-08-29 IMPAX FUNDS SERIES TRUST I /s/ Alicia DuBois Alicia DuBois Treasurer