NPORT-P false 0000276914 XXXXXXXX S000006834 C000188220 C000018475 C000151974 C000151972 C000054856 C000151973 C000018473 C000018476 C000018477 C000054857 C000054855 LORD ABBETT DEVELOPING GROWTH FUND, INC. 811-02871 0000276914 549300HWJ2W28SDTJF85 30 HUDSON STREET JERSEY CITY 07302 201-827-2000 LORD ABBETT DEVELOPING GROWTH FUND INC S000006834 549300HWJ2W28SDTJF85 2025-07-31 2025-04-30 N 1778494680.19 14723320.41 1763771359.78 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 0.00000000 N Primoris Services Corp 549300UF3OLBJ8D5K349 74164F103 179553.00000000 NS USD 10767793.41000000 0.610498257061 Long EC CORP US N 1 N N N Carpenter Technology Corp DX6I6ZD3X5WNNCDJKP85 144285103 118373.00000000 NS USD 23154942.53000000 1.312808624633 Long EC CORP US N 1 N N N Vertex Inc 549300QMYW171MP1PL50 92538J106 259045.00000000 NS USD 10369571.35000000 0.587920383926 Long EC CORP US N 1 N N N Astera Labs Inc N/A 04626A103 415706.00000000 NS USD 27149758.86000000 1.539301492194 Long EC CORP US N 1 N N N Nova Ltd 529900B2DSWE5V3SC292 000000000 88507.00000000 NS USD 17365958.47000000 0.984592383457 Long EC CORP IL N 1 N N N Piper Sandler Cos QUQDBTUSOAKFEVMRMF78 724078100 55188.00000000 NS USD 13306930.56000000 0.754458931777 Long EC CORP US N 1 N N N Waystar Holding Corp N/A 946784105 925907.00000000 NS USD 34415963.19000000 1.951271234741 Long EC CORP US N 1 N N N Mirion Technologies Inc 549300BNTOWVWFNVTJ65 60471A101 1303241.00000000 NS USD 20565142.98000000 1.165975559471 Long EC CORP US N 1 N N N Evercore Inc 529900P6KLPT95DW3W58 29977A105 47940.00000000 NS USD 9841602.60000000 0.557986302784 Long EC CORP US N 1 N N N MarketAxess Holdings Inc 5493002U1CA1XJOVID83 57060D108 51857.00000000 NS USD 11490992.63000000 0.651501259859 Long EC CORP US N 1 N N N IES Holdings Inc 549300687T8E6LN6EN72 44951W106 71259.00000000 NS USD 14015220.12000000 0.794616606188 Long EC CORP US N 1 N N N MACOM Technology Solutions Holdings Inc N/A 55405Y100 173939.00000000 NS USD 18046171.25000000 1.023158197344 Long EC CORP US N 1 N N N Sprouts Farmers Market Inc 529900P8F4G77Q52XE24 85208M102 190011.00000000 NS USD 32491881.00000000 1.842182141116 Long EC CORP US N 1 N N N Cava Group Inc N/A 148929102 236149.00000000 NS USD 21827252.07000000 1.237532968713 Long EC CORP US N 1 N N N ExlService Holdings Inc 81E3DTNF6OSH489ZOV15 302081104 482700.00000000 NS USD 23401296.00000000 1.326776051229 Long EC CORP US N 1 N N N Planet Fitness Inc 549300LLE5HUPF6H8G33 72703H101 195466.00000000 NS USD 18489128.94000000 1.048272432675 Long EC CORP US N 1 N N N Ollie's Bargain Outlet Holdings Inc 529900YO5DSQCPEFDZ05 681116109 331082.00000000 NS USD 35131111.02000000 1.991817750367 Long EC CORP US N 1 N N N iRhythm Technologies Inc 549300FJI72RJGDQS384 450056106 178850.00000000 NS USD 19117276.50000000 1.083886320865 Long EC CORP US N 1 N N N Intapp Inc N/A 45827U109 449179.00000000 NS USD 24372452.54000000 1.381837413611 Long EC CORP US N 1 N N N Modine Manufacturing Co Z35SZFYJR8GZZRSIUU09 607828100 155693.00000000 NS USD 12710776.52000000 0.720658970309 Long EC CORP US N 1 N N N Leonardo DRS Inc 549300HMMEWVG3PPQU18 52661A108 521380.00000000 NS USD 19270204.80000000 1.092556849454 Long EC CORP US N 1 N N N Dutch Bros Inc N/A 26701L100 376821.00000000 NS USD 22511286.54000000 1.276315459777 Long EC CORP US N 1 N N N Remitly Global Inc N/A 75960P104 1202789.00000000 NS USD 24320393.58000000 1.378885842835 Long EC CORP US N 1 N N N StoneX Group Inc 549300JUF07L8VF02M60 861896108 238204.00000000 NS USD 21096537.26000000 1.196103856830 Long EC CORP US N 1 N N N Madrigal Pharmaceuticals Inc 549300CHIMT2EUSNJB60 558868105 62500.00000000 NS USD 20869375.00000000 1.183224508340 Long EC CORP US N 1 N N N MasTec Inc 549300TMDIT8WREDOF45 576323109 191577.00000000 NS USD 24391583.64000000 1.382922083678 Long EC CORP US N 1 N N N Penumbra Inc 549300RGE06P3ECANU72 70975L107 89902.00000000 NS USD 26326901.68000000 1.492648212820 Long EC CORP US N 1 N N N Comfort Systems USA Inc 5299009DT1ZA5HTU6R38 199908104 70672.00000000 NS USD 28095653.60000000 1.592930594105 Long EC CORP US N 1 N N N Rocket Lab USA Inc 254900B4DEYFZJ980A14 773122106 480135.00000000 NS USD 10462141.65000000 0.593168813632 Long EC CORP US N 1 N N N Monday.com Ltd 984500MDAFVD86E3B328 000000000 65364.00000000 NS USD 18366630.36000000 1.041327168522 Long EC CORP IL N 1 N N N Rubrik Inc 254900TRGK2WTBYMYU27 781154109 366376.00000000 NS USD 25840499.28000000 1.465070806185 Long EC CORP US N 1 N N N Verona Pharma PLC 213800EVI6O6J3TIAL06 925050106 487881.00000000 NS USD 35161583.67000000 1.993545448792 Long EC CORP GB N 1 N N N Duolingo Inc N/A 26603R106 64455.00000000 NS USD 25103933.40000000 1.423309957994 Long EC CORP US N 1 N N N CyberArk Software Ltd 529900YEXNDM894PWS93 000000000 151531.00000000 NS USD 53363156.96000000 3.025514427598 Long EC CORP IL N 1 N N N Doximity Inc N/A 26622P107 523932.00000000 NS USD 29801252.16000000 1.689632388844 Long EC CORP US N 1 N N N Universal Technical Institute Inc 2549003YOJGAZ0PVFV48 913915104 1381018.00000000 NS USD 38751365.08000000 2.197074176600 Long EC CORP US N 1 N N N ServiceTitan Inc N/A 81764X103 103441.00000000 NS USD 11958814.01000000 0.678025184142 Long EC CORP US N 1 N N Calix Inc 5299002RQRZ4SXSCSJ58 13100M509 171473.00000000 NS USD 7014960.43000000 0.397725044751 Long EC CORP US N 1 N N N Adtalem Global Education Inc 549300Z467EZLMODV621 00737L103 282364.00000000 NS USD 29987056.80000000 1.700166897127 Long EC CORP US N 1 N N N Guidewire Software Inc 549300WXSG0J8IXZCK32 40171V100 199408.00000000 NS USD 40832776.16000000 2.315083297706 Long EC CORP US N 1 N N N Tarsus Pharmaceuticals Inc N/A 87650L103 521143.00000000 NS USD 27052533.13000000 1.533789115011 Long EC CORP US N 1 N N N Guardant Health Inc 254900M8C3E5VC8BR186 40131M109 661769.00000000 NS USD 31255349.87000000 1.772074917573 Long EC CORP US N 1 N N N Fidelity Investments E57ODZWZ7FF32TWEFA76 31607A703 11219158.79999999 NS USD 11219158.79999999 0.636089181162 Long STIV RF US N 1 N N Rambus Inc 2549000211GDCQSLV833 750917106 237061.00000000 NS USD 11566206.19000000 0.655765619838 Long EC CORP US N 1 N N N GeneDx Holdings Corp N/A 81663L200 187114.00000000 NS USD 12508570.90000000 0.709194580728 Long EC CORP US N 1 N N N Krystal Biotech Inc 549300YONUY68210OE41 501147102 51463.00000000 NS USD 8742534.44000000 0.495672774791 Long EC CORP US N 1 N N N Construction Partners Inc 549300MHLFL4E8JLZU44 21044C107 243807.00000000 NS USD 20026306.98000000 1.135425341213 Long EC CORP US N 1 N N N ADMA Biologics Inc N/A 000899104 1309240.00000000 NS USD 31159912.00000000 1.766663906136 Long EC CORP US N 1 N N N Reddit Inc N/A 75734B100 178796.00000000 NS USD 20842249.72000000 1.181686594718 Long EC CORP US N 1 N N N Fixed Income Clearing Corp 549300H47WTHXPU08X20 000000000 41726390.76000000 PA USD 41726390.76000000 2.365748288667 Long RA CORP US N 2 Repurchase N 4.00000000 2025-05-01 44218600.00000000 USD 42560918.58000000 USD UST N N N Procore Technologies Inc 5493005PTWY0RHYRAH22 74275K108 129503.00000000 NS USD 8299847.27000000 0.470573877049 Long EC CORP US N 1 N N N Vital Farms Inc 549300S6NYY7ER3XOT61 92847W103 295732.00000000 NS USD 10125863.68000000 0.574102965435 Long EC CORP US N 1 N N N Crane Co 5493000CQRQOTHUODL75 224408104 146263.00000000 NS USD 23545417.74000000 1.334947277006 Long EC CORP US N 1 N N N Citibank NA E57ODZWZ7FF32TWEFA76 000000000 1246573.20000000 NS USD 1246573.20000000 0.070676575684 Long STIV RF US N 1 N N Blueprint Medicines Corp 5299004CC60O9T5HVM83 09627Y109 96227.00000000 NS USD 8612316.50000000 0.488289848468 Long EC CORP US N 1 N N N Bridgebio Pharma Inc 54930028YG89VTY2J114 10806X102 593204.00000000 NS USD 22755305.44000000 1.290150523979 Long EC CORP US N 1 N N N Fabrinet 5493004TETZ6IYF7CV44 000000000 57135.00000000 NS USD 11716103.10000000 0.664264278645 Long EC CORP KY N 1 N N N Arcellx Inc N/A 03940C100 201224.00000000 NS USD 13069498.80000000 0.740997336617 Long EC CORP US N 1 N N N Credo Technology Group Holding Ltd N/A 000000000 463010.00000000 NS USD 19932580.50000000 1.130111359926 Long EC CORP KY N 1 N N N TG Therapeutics Inc 529900X21UKABN9NJ529 88322Q108 414328.00000000 NS USD 18856067.28000000 1.069076622400 Long EC CORP US N 1 N N N Gitlab Inc 9845004Y40FACG81ED49 37637K108 370090.00000000 NS USD 17272100.30000000 0.979270935783 Long EC CORP US N 1 N N N Insmed Inc 529900Q55QAG41CCAC11 457669307 340841.00000000 NS USD 24540552.00000000 1.391368096773 Long EC CORP US N 1 N N N Maplebear Inc N/A 565394103 630972.00000000 NS USD 25169473.08000000 1.427025840987 Long EC CORP US N 1 N N N Clearwater Analytics Holdings Inc N/A 185123106 1082898.00000000 NS USD 24625100.52000000 1.396161718096 Long EC CORP US N 1 N N N Descartes Systems Group Inc/The 875500NEPA7JI5EOMN45 249906108 87636.00000000 NS USD 9235958.04000000 0.523648260234 Long EC CORP CA N 1 N N N Global-e Online Ltd N/A 000000000 487571.00000000 NS USD 17508674.61000000 0.992683916365 Long EC CORP IL N 1 N N N Natera Inc N/A 632307104 175843.00000000 NS USD 26539983.99000000 1.504729274734 Long EC CORP US N 1 N N N Kratos Defense & Security Solutions Inc 5493000EKBN0UY1F3F88 50077B207 515665.00000000 NS USD 17421742.03000000 0.987755126728 Long EC CORP US N 1 N N N Life Time Group Holdings Inc N/A 53190C102 1119830.00000000 NS USD 34333987.80000000 1.946623501375 Long EC CORP US N 1 N N N Summit Therapeutics Inc N/A 86627T108 118184.00000000 NS USD 2850598.08000000 0.161619478862 Long EC CORP US N 1 N N Primo Brands Corp 254900J0WS4AXV2LAX55 741623102 712421.00000000 NS USD 23274794.07000000 1.319603810377 Long EC CORP US N 1 N N N Glaukos Corp 5299004JA1LHE21M6T14 377322102 122149.00000000 NS USD 11512543.25000000 0.652723108704 Long EC CORP US N 1 N N N FTAI Aviation Ltd N/A 000000000 104745.00000000 NS USD 11219236.95000000 0.636093612008 Long EC CORP KY N 1 N N N Klaviyo Inc N/A 49845K101 920943.00000000 NS USD 28033504.92000000 1.589406969591 Long EC CORP US N 1 N N N PROCEPT BioRobotics Corp N/A 74276L105 181038.00000000 NS USD 9772431.24000000 0.554064515551 Long EC CORP US N 1 N N N Wix.com Ltd 5493008P6N29Q1AG9464 000000000 184461.00000000 NS USD 31282740.99000000 1.773627903443 Long EC CORP IL N 1 N N N Q2 Holdings Inc 549300M9RKR9DZXWS696 74736L109 380363.00000000 NS USD 30143767.75000000 1.709051889455 Long EC CORP US N 1 N N N Mirum Pharmaceuticals Inc 254900YZKR40F7F27K81 604749101 284360.00000000 NS USD 12355442.00000000 0.700512678782 Long EC CORP US N 1 N N N Stride Inc 254900BRWS3AFONWU277 86333M108 294594.00000000 NS USD 41905996.50000000 2.375931339832 Long EC CORP US N 1 N N N Loar Holdings Inc N/A 53947R105 362203.00000000 NS USD 34257159.74000000 1.942267604587 Long EC CORP US N 1 N N N Argan Inc 529900E4KZWBV9KGBS83 04010E109 125122.00000000 NS USD 19159931.86000000 1.086304738636 Long EC CORP US N 1 N N N BellRing Brands Inc 549300S3BOK5CMTS8054 07831C103 251686.00000000 NS USD 19415058.04000000 1.100769548861 Long EC CORP US N 1 N N N MakeMyTrip Ltd 529900DNT8HNJ7RYUO60 000000000 184399.00000000 NS USD 19328703.18000000 1.095873514037 Long EC CORP MU N 1 N N N Karman Holdings Inc N/A 485924104 599573.00000000 NS USD 21434734.75000000 1.215278535460 Long EC CORP US N 1 N N 2025-05-29 LORD ABBETT DEVELOPING GROWTH FUND, INC. Michael Hebert Michael Hebert Chief Financial Officer XXXX