NPORT-P false 0000076721 XXXXXXXX S000015763 C000043241 C000043242 C000128848 IMPAX FUNDS SERIES TRUST I 811-02064 0000076721 549300TD5R23SWU72456 30 Penhallow St., Suite 100 Portsmouth 03801 603-431-8022 Impax US Sustainable Economy Fund S000015763 5493001FQOFD3O7VGQ38 2025-12-31 2025-12-31 N 554640463.45 444272.37 554196191.08 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 81529.29000000 N AGCO Corp. LYOM0B2GCF1JWXK5ZG04 001084102 10003.00000000 NS USD 1043512.96000000 0.188293058811 Long EC CORP US N 1 N N N AT&T, Inc. 549300Z40J86GGSTL398 00206R102 56329.00000000 NS USD 1399212.36000000 0.252475997222 Long EC CORP US N 1 N N N AbbVie, Inc. FR5LCKFTG8054YNNRU85 00287Y109 5332.00000000 NS USD 1218308.68000000 0.219833463240 Long EC CORP US N 1 N N N Adobe, Inc. FU4LY2G4933NH2E1CP29 00724F101 12358.00000000 NS USD 4325176.42000000 0.780441383325 Long EC CORP US N 1 N N N Advanced Micro Devices, Inc. R2I72C950HOYXII45366 007903107 52068.00000000 NS USD 11150882.88000000 2.012082193901 Long EC CORP US N 1 N N N Agilent Technologies, Inc. QUIX8Y7A2WP0XRMW7G29 00846U101 7786.00000000 NS USD 1059441.02000000 0.191167142079 Long EC CORP US N 1 N N N Albemarle Corp. HDBLS2Q6GV1LSKQPBS54 012653101 12901.00000000 NS USD 1824717.44000000 0.329254778248 Long EC CORP US N 1 N N N Allstate Corp. (The) OBT0W1ED8G0NWVOLOJ77 020002101 6378.00000000 NS USD 1327580.70000000 0.239550672012 Long EC CORP US N 1 N N N Alphabet, Inc. 5493006MHB84DD0ZWV18 02079K107 33019.00000000 NS USD 10361362.20000000 1.869619886742 Long EC CORP US N 1 N N N Alphabet, Inc. 5493006MHB84DD0ZWV18 02079K305 58475.00000000 NS USD 18302675.00000000 3.302562394796 Long EC CORP US N 1 N N N Amazon.com, Inc. ZXTILKJKG63JELOEG630 023135106 74668.00000000 NS USD 17234867.76000000 3.109885639310 Long EC CORP US N 1 N N N American Express Co. R4PP93JZOLY261QX3811 025816109 3395.00000000 NS USD 1255980.25000000 0.226630978381 Long EC CORP US N 1 N N N American Water Works Co., Inc. 549300DXHIJQMD5WFW18 030420103 50815.00000000 NS USD 6631357.50000000 1.196572189909 Long EC CORP US N 1 N N N Cencora, Inc. AI8GXW8LG5WK7E9UD086 03073E105 4008.00000000 NS USD 1353702.00000000 0.244264038942 Long EC CORP US N 1 N N N Amgen, Inc. 62QBXGPJ34PQ72Z12S66 031162100 17735.00000000 NS USD 5804842.85000000 1.047434634779 Long EC CORP US N 1 N N N Amphenol Corp. 549300D3L3G0R4U4VT04 032095101 8531.00000000 NS USD 1152879.34000000 0.208027294044 Long EC CORP US N 1 N N N Analog Devices, Inc. GYVOE5EZ4GDAVTU4CQ61 032654105 19688.00000000 NS USD 5339385.60000000 0.963446823695 Long EC CORP US N 1 N N N Elevance Health, Inc. 8MYN82XMYQH89CTMTH67 036752103 12278.00000000 NS USD 4304052.90000000 0.776629823386 Long EC CORP US N 1 N N N Apple, Inc. HWUPKR0MPOU8FGXBT394 037833100 117567.00000000 NS USD 31961764.62000000 5.767229211322 Long EC CORP US N 1 N N N Applied Materials, Inc. 41BNNE1AFPNAZELZ6K07 038222105 23996.00000000 NS USD 6166732.04000000 1.112734468272 Long EC CORP US N 1 N N N Arista Networks, Inc. 635400H1WKBLOQERUU95 040413205 11930.00000000 NS USD 1563187.90000000 0.282063991986 Long EC CORP US N 1 N N N Autodesk, Inc. FRKKVKAIQEF3FCSTPG55 052769106 12350.00000000 NS USD 3655723.50000000 0.659644284612 Long EC CORP US N 1 N N N Bank of America Corp. 9DJT3UXIJIZJI4WXO774 060505104 20517.00000000 NS USD 1128435.00000000 0.203616520315 Long EC CORP US N 1 N N N Bank of New York Mellon Corp. (The) WFLLPEPC7FZXENRZV188 064058100 51797.00000000 NS USD 6013113.73000000 1.085015347774 Long EC CORP US N 1 N N N Best Buy Co., Inc. HL5XPTVRV0O8TUN5LL90 086516101 14856.00000000 NS USD 994312.08000000 0.179415177513 Long EC CORP US N 1 N N N Blackrock, Inc. 529900VBK42Y5HHRMD23 09290D101 940.00000000 NS USD 1006119.60000000 0.181545744303 Long EC CORP US N 1 N N N BorgWarner, Inc. 549300DSFX2IE88NSX47 099724106 36776.00000000 NS USD 1657126.56000000 0.299014426059 Long EC CORP US N 1 N N N Bristol-Myers Squibb Co. HLYYNH7UQUORYSJQCN42 110122108 28686.00000000 NS USD 1547322.84000000 0.279201276534 Long EC CORP US N 1 N N N Broadridge Financial Solutions, Inc. 549300KZDJZQ2YIHRC28 11133T103 6403.00000000 NS USD 1428957.51000000 0.257843257135 Long EC CORP US N 1 N N N Broadcom, Inc. 549300WV6GIDOZJTV909 11135F101 65373.00000000 NS USD 22625595.30000000 4.082596680411 Long EC CORP US N 1 N N N CBRE Group, Inc. 52990016II9MJ2OSWA10 12504L109 8377.00000000 NS USD 1346937.83000000 0.243043501864 Long EC CORP US N 1 N N N CME Group, Inc. LCZ7XYGSLJUHFXXNXD88 12572Q105 3947.00000000 NS USD 1077846.76000000 0.194488301678 Long EC CORP US N 1 N N N Cadence Design Systems, Inc. GCT7RXJOGLXPV0NXZY22 127387108 5044.00000000 NS USD 1576653.52000000 0.284493748852 Long EC CORP US N 1 N N N Campbell's Co. (The) 5493007JDSMX8Z5Z1902 134429109 46337.00000000 NS USD 1291412.19000000 0.233024371294 Long EC CORP US N 1 N N N Cardinal Health, Inc. CCU46N3GJMF4OK4N7U60 14149Y108 5445.00000000 NS USD 1118947.50000000 0.201904581447 Long EC CORP US N 1 N N N Cisco Systems, Inc. 549300LKFJ962MZ46593 17275R102 16115.00000000 NS USD 1241338.45000000 0.223988989816 Long EC CORP US N 1 N N N Citigroup, Inc. 6SHGI4ZSSLCXXQSBB395 172967424 60286.00000000 NS USD 7034773.34000000 1.269365155016 Long EC CORP US N 1 N N N Clorox Co. (The) 54930044KVSC06Z79I06 189054109 15372.00000000 NS USD 1549958.76000000 0.279676905931 Long EC CORP US N 1 N N N Colgate-Palmolive Co. YMEGZFW4SBUSS5BQXF88 194162103 13200.00000000 NS USD 1043064.00000000 0.188212047788 Long EC CORP US N 1 N N N Comcast Corp. 51M0QTTNCGUN7KFCFZ59 20030N101 41028.00000000 NS USD 1226326.92000000 0.221280286609 Long EC CORP US N 1 N N N Cummins, Inc. ZUNI8PYC725B6H8JU438 231021106 3403.00000000 NS USD 1737061.35000000 0.313437980621 Long EC CORP US N 1 N N N Deckers Outdoor Corp. 5493008LG4W3I6K8J118 243537107 9952.00000000 NS USD 1031723.84000000 0.186165812144 Long EC CORP US N 1 N N N eBay, Inc. OML71K8X303XQONU6T67 278642103 17490.00000000 NS USD 1523379.00000000 0.274880813783 Long EC CORP US N 1 N N N Ecolab, Inc. 82DYEISM090VG8LTLS26 278865100 11555.00000000 NS USD 3033418.60000000 0.547354646030 Long EC CORP US N 1 N N N Edison International 549300I7ROF15MAEVP56 281020107 61827.00000000 NS USD 3710856.54000000 0.669592573844 Long EC CORP US N 1 N N N Edwards Lifesciences Corp. YA13X31F3V31L8TMPR58 28176E108 22632.00000000 NS USD 1929378.00000000 0.348139888193 Long EC CORP US N 1 N N N Emerson Electric Co. FGLT0EWZSUIRRITFOA30 291011104 42357.00000000 NS USD 5621621.04000000 1.014373813909 Long EC CORP US N 1 N N N Fifth Third Bancorp THRNG6BD57P9QWTQLG42 316773100 37103.00000000 NS USD 1736791.43000000 0.313389275847 Long EC CORP US N 1 N N N Fortinet, Inc. 549300O0QJWDBAS0QX03 34959E109 13327.00000000 NS USD 1058297.07000000 0.190960726008 Long EC CORP US N 1 N N N General Mills, Inc. 2TGYMUGI08PO8X8L6150 370334104 49272.00000000 NS USD 2291148.00000000 0.413418214862 Long EC CORP US N 1 N N N Gilead Sciences, Inc. 549300WTZWR07K8MNV44 375558103 74134.00000000 NS USD 9099207.16000000 1.641874719901 Long EC CORP US N 1 N N N WW Grainger, Inc. 549300TWZSP6O1IH2V34 384802104 1167.00000000 NS USD 1177561.35000000 0.212480953307 Long EC CORP US N 1 N N N Hartford Insurance Group, Inc. (The) IU7C3FTM7Y3BQM112U94 416515104 36451.00000000 NS USD 5022947.80000000 0.906348307845 Long EC CORP US N 1 N N N Hewlett Packard Enterprise Co. 549300BX44RGX6ANDV88 42824C109 70515.00000000 NS USD 1693770.30000000 0.305626477998 Long EC CORP US N 1 N N N Home Depot, Inc. (The) QEKMOTMBBKA8I816DO57 437076102 11724.00000000 NS USD 4034228.40000000 0.727942281981 Long EC CORP US N 1 N N N ITT, Inc. 549300KDSERHTJOXUS80 45073V108 6597.00000000 NS USD 1144645.47000000 0.206541562071 Long EC CORP US N 1 N N N IDEXX Laboratories, Inc. OGMTXK0LUU1HKV2P0J84 45168D104 8646.00000000 NS USD 5849278.38000000 1.055452649106 Long EC CORP US N 1 N N N Insulet Corp. 549300TZTYD2PYN92D43 45784P101 3258.00000000 NS USD 926053.92000000 0.167098571752 Long EC CORP US N 1 N N N Intel Corp. KNX4USFCNGPY45LOCE31 458140100 29969.00000000 NS USD 1105856.10000000 0.199542349406 Long EC CORP US N 1 N N N Intuit, Inc. VI90HBPH7XSFMB9E4M29 461202103 1767.00000000 NS USD 1170496.14000000 0.211206096115 Long EC CORP US N 1 N N N JPMorgan Chase & Co. 8I5DZWZKVSZI1NUHU748 46625H100 18789.00000000 NS USD 6054191.58000000 1.092427497237 Long EC CORP US N 1 N N N Johnson & Johnson 549300G0CFPGEF6X2043 478160104 58137.00000000 NS USD 12031452.15000000 2.170973446525 Long EC CORP US N 1 N N N JPMorgan U.S. Treasury Plus Money Market Fund 549300WIC5LVF25Z1127 4812C2262 4435158.50000000 NS USD 4435158.50000000 0.800286716398 Long STIV RF US N 1 N N N KLA Corp. 549300H0BF5JCG96TJ81 482480100 1135.00000000 NS USD 1379115.80000000 0.248849743501 Long EC CORP US N 1 N N LPL Financial Holdings, Inc. 549300XROQ4Y8G2L7682 50212V100 9836.00000000 NS USD 3513124.12000000 0.633913436531 Long EC CORP US N 1 N N N Lam Research Corp. 549300I4GMO6D34U1T02 512807306 12513.00000000 NS USD 2141975.34000000 0.386501274183 Long EC CORP US N 1 N N N Lear Corp. 549300UPNBTXA1SYTQ33 521865204 17264.00000000 NS USD 1978454.40000000 0.356995308131 Long EC CORP US N 1 N N N Lennox International, Inc. S7DWAC87RDMPBF77GJ92 526107107 8467.00000000 NS USD 4111405.86000000 0.741868299741 Long EC CORP US N 1 N N N Eli Lilly & Co. FRDRIPF3EKNDJ2CQJL29 532457108 10730.00000000 NS USD 11531316.40000000 2.080728194383 Long EC CORP US N 1 N N N Lincoln Electric Holdings, Inc. BIMGBY40SIN95O01BN93 533900106 5372.00000000 NS USD 1287346.08000000 0.232290676247 Long EC CORP US N 1 N N N Lincoln National Corp. EFQMQROEDSNBRIP7LE47 534187109 26095.00000000 NS USD 1162010.35000000 0.209674907316 Long EC CORP US N 1 N N N Lowe's Cos., Inc. WAFCR4OKGSC504WU3E95 548661107 6286.00000000 NS USD 1515931.76000000 0.273537022520 Long EC CORP US N 1 N N N Macy's, Inc. 529900NZQ81TIOW3CW52 55616P104 127683.00000000 NS USD 2815410.15000000 0.508016871157 Long EC CORP US N 1 N N N Mastercard, Inc. AR5L2ODV9HN37376R084 57636Q104 21033.00000000 NS USD 12007319.04000000 2.166618831609 Long EC CORP US N 1 N N N McKesson Corp. 549300WZWOM80UCFSF54 58155Q103 1336.00000000 NS USD 1095907.44000000 0.197747198129 Long EC CORP US N 1 N N N Merck & Co., Inc. 4YV9Y5M8S0BRK1RP0397 58933Y105 72691.00000000 NS USD 7651454.66000000 1.380640066307 Long EC CORP US N 1 N N N MetLife, Inc. C4BXATY60WC6XEOZDX54 59156R108 63211.00000000 NS USD 4989876.34000000 0.900380843519 Long EC CORP US N 1 N N N Mettler-Toledo International, Inc. 5493000BD5GJNUDIUG10 592688105 3242.00000000 NS USD 4519963.98000000 0.815589145640 Long EC CORP US N 1 N N N Microsoft Corp. INR2EJN1ERAN0W5ZP974 594918104 64425.00000000 NS USD 31157218.50000000 5.622055691014 Long EC CORP US N 1 N N N Micron Technology, Inc. B3DXGBC8GAIYWI2Z0172 595112103 23203.00000000 NS USD 6622368.23000000 1.194950152417 Long EC CORP US N 1 N N N Moody's Corp. 549300GCEDD8YCF5WU84 615369105 2380.00000000 NS USD 1215823.00000000 0.219384943377 Long EC CORP US N 1 N N N Motorola Solutions, Inc. 6S552MUG6KGJVEBSEC55 620076307 3776.00000000 NS USD 1447416.32000000 0.261173992765 Long EC CORP US N 1 N N N NetApp, Inc. QTX3D84DZDD5JYOCYH15 64110D104 9895.00000000 NS USD 1059655.55000000 0.191205852197 Long EC CORP US N 1 N N N Gen Digital, Inc. YF6ZV0M6AU4FY94MK914 668771108 38973.00000000 NS USD 1059675.87000000 0.191209518768 Long EC CORP US N 1 N N N NVIDIA Corp. 549300S4KLFTLO7GSQ80 67066G104 253721.00000000 NS USD 47318966.50000000 8.538305975684 Long EC CORP US N 1 N N N Oracle Corp. 1Z4GXXU7ZHVWFCD8TV52 68389X105 45875.00000000 NS USD 8941496.25000000 1.613417124461 Long EC CORP US N 1 N N N PG&E Corp. 8YQ2GSDWYZXO2EDN3511 69331C108 68888.00000000 NS USD 1107030.16000000 0.199754198570 Long EC CORP US N 1 N N N PNC Financial Services Group, Inc. (The) CFGNEKW0P8842LEUIA51 693475105 5763.00000000 NS USD 1202910.99000000 0.217055080738 Long EC CORP US N 1 N N N Palo Alto Networks, Inc. 549300QXR2YVZV231H43 697435105 7624.00000000 NS USD 1404340.80000000 0.253401380702 Long EC CORP US N 1 N N N Pinterest, Inc. 529900Y043CEBGO4HB65 72352L106 41243.00000000 NS USD 1067781.27000000 0.192672069419 Long EC CORP US N 1 N N N Principal Financial Group, Inc. CUMYEZJOAF02RYZ1JJ85 74251V102 13450.00000000 NS USD 1186424.50000000 0.214080233515 Long EC CORP US N 1 N N N Procter & Gamble Co. (The) 2572IBTT8CCZW6AU4141 742718109 8663.00000000 NS USD 1241494.53000000 0.224017153127 Long EC CORP US N 1 N N N Progressive Corp. (The) 529900TACNVLY9DCR586 743315103 30532.00000000 NS USD 6952747.04000000 1.254564205223 Long EC CORP US N 1 N N N Prologis, Inc. 529900DFH19P073LZ636 74340W103 36625.00000000 NS USD 4675547.50000000 0.843662871606 Long EC CORP US N 1 N N N QUALCOMM, Inc. H1J8DDZKZP6H7RWC0H53 747525103 33751.00000000 NS USD 5773108.55000000 1.041708449628 Long EC CORP US N 1 N N N Rayonier, Inc. HGV8VDVNL0W6SF2U9C50 754907103 54754.00000000 NS USD 1185424.10000000 0.213899719824 Long EC CORP US N 1 N N N Regency Centers Corp. 529900053A7X7FJ97S58 758849103 14896.00000000 NS USD 1028270.88000000 0.185542754813 Long EC CORP US N 1 N N N Regions Financial Corp. CW05CS5KW59QTC0DG824 7591EP100 45022.00000000 NS USD 1220096.20000000 0.220156006056 Long EC CORP US N 1 N N N Republic Services, Inc. NKNQHM6BLECKVOQP7O46 760759100 29778.00000000 NS USD 6310851.54000000 1.138739609108 Long EC CORP US N 1 N N N ResMed, Inc. 529900T3QE5253CCXF22 761152107 3869.00000000 NS USD 931926.03000000 0.168158144173 Long EC CORP US N 1 N N N Rockwell Automation, Inc. VH3R4HHBHH12O0EXZJ88 773903109 6487.00000000 NS USD 2523897.09000000 0.455415813140 Long EC CORP US N 1 N N N S&P Global, Inc. Y6X4K52KMJMZE7I7MY94 78409V104 14512.00000000 NS USD 7583826.08000000 1.368437062914 Long EC CORP US N 1 N N N SBA Communications Corp. 5299001HX8ZN8Y8QIT49 78410G104 5372.00000000 NS USD 1039105.96000000 0.187497853057 Long EC CORP US N 1 N N N ServiceNow, Inc. 549300HJTQM36M0E1G39 81762P102 19665.00000000 NS USD 3012481.35000000 0.543576696932 Long EC CORP US N 1 N N N Sherwin-Williams Co. (The) Z15BMIOX8DDH0X2OBP21 824348106 3284.00000000 NS USD 1064114.52000000 0.192010435496 Long EC CORP US N 1 N N N Stanley Black & Decker, Inc. 549300DJ09SMTO561131 854502101 14942.00000000 NS USD 1109891.76000000 0.200270550008 Long EC CORP US N 1 N N N Starbucks Corp. OQSJ1DU9TAOC51A47K68 855244109 12605.00000000 NS USD 1061467.05000000 0.191532722000 Long EC CORP US N 1 N N N State Street Corp. 549300ZFEEJ2IP5VME73 857477103 63381.00000000 NS USD 8176782.81000000 1.475431073256 Long EC CORP US N 1 N N N Texas Instruments, Inc. WDJNR2L6D8RWOEB8T652 882508104 8016.00000000 NS USD 1390695.84000000 0.250939263456 Long EC CORP US N 1 N N N Timken Co. (The) B0I35MLPFXZSE70ASS73 887389104 14134.00000000 NS USD 1189093.42000000 0.214561817482 Long EC CORP US N 1 N N N Union Pacific Corp. 549300LMMRSZZCZ8CL11 907818108 36625.00000000 NS USD 8472095.00000000 1.528717652044 Long EC CORP US N 1 N N N Unum Group 549300E32YFDO6TZ8R31 91529Y106 13829.00000000 NS USD 1071747.50000000 0.193387741967 Long EC CORP US N 1 N N N Veralto Corp. 635400FJE6GSOJUSNY27 92338C103 21223.00000000 NS USD 2117630.94000000 0.382108533779 Long EC CORP US N 1 N N N Verizon Communications, Inc. 2S72QS2UO2OESLG6Y829 92343V104 44601.00000000 NS USD 1816598.73000000 0.327789825920 Long EC CORP US N 1 N N N Verisk Analytics, Inc. 549300I1YSWNIRKBWP67 92345Y106 5160.00000000 NS USD 1154240.40000000 0.208272885771 Long EC CORP US N 1 N N N Visa, Inc. 549300JZ4OKEHW3DPJ59 92826C839 35441.00000000 NS USD 12429513.11000000 2.242800168975 Long EC CORP US N 1 N N N Waste Management, Inc. 549300YX8JIID70NFS41 94106L109 4819.00000000 NS USD 1058782.49000000 0.191048315928 Long EC CORP US N 1 N N N Waters Corp. 5T547R1474YC9HOD8Q74 941848103 4995.00000000 NS USD 1897250.85000000 0.342342816594 Long EC CORP US N 1 N N N Wells Fargo & Co. PBLD0EJDB5FWOLXP3B76 949746101 12628.00000000 NS USD 1176929.60000000 0.212366959380 Long EC CORP US N 1 N N N WESCO International, Inc. 529900TXOGREY3WNJ434 95082P105 5117.00000000 NS USD 1251822.88000000 0.225880816243 Long EC CORP US N 1 N N N Weyerhaeuser Co. 08IRJODWFYBI7QWRGS31 962166104 67781.00000000 NS USD 1605731.89000000 0.289740693971 Long EC CORP US N 1 N N N Xylem, Inc. 549300DF5MV96DRYLQ48 98419M100 11541.00000000 NS USD 1571653.38000000 0.283591516018 Long EC CORP US N 1 N N N Zoetis, Inc. 549300HD9Q1LOC9KLJ48 98978V103 47814.00000000 NS USD 6015957.48000000 1.085528478331 Long EC CORP US N 1 N N N Axalta Coating Systems Ltd. 529900AGLPA40GV6H619 N/A 41672.00000000 NS USD 1346422.32000000 0.242950482459 Long EC CORP BM N 1 N N N Accenture plc 5493000EWHDSR3MZWH98 N/A 5771.00000000 NS USD 1548359.30000000 0.279388296946 Long EC CORP IE N 1 N N N CRH plc 549300MIDJNNTH068E74 N/A 13537.00000000 NS USD 1689417.60000000 0.304841070218 Long EC CORP IE N 1 N N N Aptiv plc N/A N/A 53562.00000000 NS USD 4075532.58000000 0.735395270771 Long EC CORP JE N 1 N N N Linde plc 5299003QR1WT0EF88V51 N/A 9353.00000000 NS USD 3988025.67000000 0.719605391409 Long EC CORP IE N 1 N N N Trane Technologies plc 549300BURLR9SLYY2705 N/A 12842.00000000 NS USD 4998106.40000000 0.901865888009 Long EC CORP IE N 1 N N N MS GOVT US LEX 6N8SC06AK49F0N7KIX52 61747C707 126875.00000000 PA USD 126875.00000000 0.022893517141 Long STIV RF US N 1 N N 2026-01-30 IMPAX FUNDS SERIES TRUST I Daniel Saltus Daniel Saltus Treasurer