NPORT-P false 0000898031 XXXXXXXX S000007142 C000019536 C000019535 C000221454 C000221457 LORD ABBETT SECURITIES TRUST 811-07538 0000898031 5493002HV0D15KTWO412 30 HUDSON STREET JERSEY CITY 07302 201-827-2000 Lord Abbett Micro-Cap Growth Fund S000007142 549300VL8AMXUES9JL76 2026-10-31 2026-04-30 N 220266679.34 16644340.08 203622339.26 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 6850.00000000 NS USD 1240877.50000000 0.609401455905 Long EC CORP US N 1 N N N 10X Genomics Inc 5493003Z6741WNLG7H43 88025U109 92784.00000000 NS USD 2045887.20000000 1.004745946557 Long EC CORP US N 1 N N N Neogen Corp 549300HJT9FC36N4UW43 640491106 84254.00000000 NS USD 791987.60000000 0.388949268964 Long EC CORP US N 1 N N N Rhythm Pharmaceuticals Inc 529900JPNWXQ8DPLA551 76243J105 18198.00000000 NS USD 1480589.28000000 0.727125169753 Long EC CORP US N 1 N N N Relay Therapeutics Inc N/A 75943R102 64586.00000000 NS USD 837034.56000000 0.411072067555 Long EC CORP US N 1 N N N Newamsterdam Pharma Co NV 984500B6549TF6E14D36 000000000 39175.00000000 NS USD 1118838.00000000 0.549467216645 Long EC CORP NL N 1 N N N BlackSky Technology Inc N/A 09263B207 73793.00000000 NS USD 2618175.64000000 1.285799804439 Long EC CORP US N 1 N N VSE Corp 549300QWJYQDH4U5XI15 918284100 15823.00000000 NS USD 2716492.64000000 1.334083799386 Long EC CORP US N 1 N N N Marex Group PLC 549300DWX0SVICJAL507 000000000 22133.00000000 NS USD 1180795.55000000 0.579894894779 Long EC CORP GB N 1 N N N Sphere Entertainment Co 254900ZW4JWKYRZZ9A91 55826T102 23938.00000000 NS USD 3409968.10000000 1.674653239125 Long EC CORP US N 1 N N N Warby Parker Inc N/A 93403J106 54101.00000000 NS USD 1196714.12000000 0.587712588092 Long EC CORP US N 1 N N N Miami International Holdings Inc 254900TREUDBWGLAP788 59356Q108 56788.00000000 NS USD 2640074.12000000 1.296554262952 Long EC CORP US N 1 N N N Billiontoone Inc N/A 090168105 12849.00000000 NS USD 964317.45000000 0.473581363176 Long EC CORP US N 1 N N York Space Systems Inc N/A 987084100 77932.00000000 NS USD 2584225.12000000 1.269126525798 Long EC CORP US N 1 N N Oruka Therapeutics Inc 529900TG7O4ESUDMGI54 687604108 26285.00000000 NS USD 1798156.85000000 0.883084270878 Long EC CORP US N 1 N N N Mineralys Therapeutics Inc N/A 603170101 82841.00000000 NS USD 2207712.65000000 1.084219274772 Long EC CORP US N 1 N N N Adaptive Biotechnologies Corp 549300ZTF7OT1FW66Q96 00650F109 324090.00000000 NS USD 4569669.00000000 2.244188440525 Long EC CORP US N 1 N N N Willdan Group Inc 529900YQO0LF5VAEKN05 96924N100 21799.00000000 NS USD 1656724.00000000 0.813625855601 Long EC CORP US N 1 N N N Neptune Insurance Holdings Inc 529900I3QTHC0Q1C2D65 64073B103 75071.00000000 NS USD 1886534.23000000 0.926486866252 Long EC CORP US N 1 N N N HeartFlow Inc N/A 42238D107 40387.00000000 NS USD 1201917.12000000 0.590267808712 Long EC CORP US N 1 N N N StoneX Group Inc 549300JUF07L8VF02M60 861896108 23024.00000000 NS USD 2441234.72000000 1.198903189537 Long EC CORP US N 1 N N N Applied Digital Corp 2549004NE2B6RYXINZ02 038169207 153977.00000000 NS USD 5273712.25000000 2.589947777422 Long EC CORP US N 1 N N Ceribell Inc N/A 15678C102 44905.00000000 NS USD 905284.80000000 0.444590118790 Long EC CORP US N 1 N N N Fastly Inc 549300E2FZC83FJ3H565 31188V100 101119.00000000 NS USD 2553760.35000000 1.254165117285 Long EC CORP US N 1 N N N Chefs' Warehouse Inc/The 549300JYEDC8C547E980 163086101 27640.00000000 NS USD 2144864.00000000 1.053353972749 Long EC CORP US N 1 N N N Forte Biosciences Inc 529900Z84WFDHPS3JP76 34962G208 32292.00000000 NS USD 860904.72000000 0.422794828469 Long EC CORP US N 1 N N N Vita Coco Co Inc/The 54930020WXOAWHR85Y25 92846Q107 57434.00000000 NS USD 3790069.66000000 1.861323111095 Long EC CORP US N 1 N N N Standex International Corp RCX52GR0JW2LRRMH9Z54 854231107 8563.00000000 NS USD 2337699.00000000 1.148056253795 Long EC CORP US N 1 N N N Dianthus Therapeutics Inc 549300Z3N6ODPCOFC890 252828108 37988.00000000 NS USD 3335346.40000000 1.638006130428 Long EC CORP US N 1 N N N Gilat Satellite Networks Ltd 529900RVHDCYJ5YWHP12 000000000 112637.00000000 NS USD 2079279.02000000 1.021144844694 Long EC CORP IL N 1 N N N Xometry Inc 5493006JFRGU7YRRXE44 98423F109 35978.00000000 NS USD 1844592.06000000 0.905888846333 Long EC CORP US N 1 N N N Twist Bioscience Corp 549300T23BL59LCOH584 90184D100 16458.00000000 NS USD 961970.10000000 0.472428567266 Long EC CORP US N 1 N N N Alamar Biosciences Inc N/A 010911105 28651.00000000 NS USD 717421.04000000 0.352329239810 Long EC CORP US N 1 N N Universal Technical Institute Inc 2549003YOJGAZ0PVFV48 913915104 90041.00000000 NS USD 3379238.73000000 1.659561884162 Long EC CORP US N 1 N N N WisdomTree Inc 549300WIU8IS7UFO7871 97717P104 87809.00000000 NS USD 1492753.00000000 0.733098836515 Long EC CORP US N 1 N N Calix Inc 5299002RQRZ4SXSCSJ58 13100M509 23626.00000000 NS USD 1029148.56000000 0.505420261715 Long EC CORP US N 1 N N N Hinge Health Inc N/A 433313103 23852.00000000 NS USD 1063799.20000000 0.522437372965 Long EC CORP US N 1 N N N IMAX Corp 894500GS1ESLAPZCEI74 45245E109 81801.00000000 NS USD 3110074.02000000 1.527373681739 Long EC CORP CA N 1 N N N MYR Group Inc 529900G1IMMZHOQ17I54 55405W104 6744.00000000 NS USD 2730038.64000000 1.340736311114 Long EC CORP US N 1 N N N Lincoln Educational Services Corp 549300BJ55KUY6RG7L98 533535100 82269.00000000 NS USD 3384546.66000000 1.662168636457 Long EC CORP US N 1 N N N Tarsus Pharmaceuticals Inc N/A 87650L103 67997.00000000 NS USD 4325289.17000000 2.124172222811 Long EC CORP US N 1 N N N Applied Optoelectronics Inc 529900I8U6Q5SYDNLT48 03823U102 22879.00000000 NS USD 3760392.44000000 1.846748472523 Long EC CORP US N 1 N N N Cipher Digital Inc 254900QABG5HCQZ28A17 17253J106 56342.00000000 NS USD 999507.08000000 0.490863175245 Long EC CORP US N 1 N N N Fidelity Investments E57ODZWZ7FF32TWEFA76 31607A703 14762625.20999999 NS USD 14762625.20999999 7.250002756892 Long STIV RF US N 1 N N GeneDx Holdings Corp N/A 81663L200 11701.00000000 NS USD 735875.89000000 0.361392513549 Long EC CORP US N 1 N N N Paymentus Holdings Inc N/A 70439P108 47311.00000000 NS USD 1327073.55000000 0.651732788662 Long EC CORP US N 1 N N N Fixed Income Clearing Corp. 549300H47WTHXPU08X20 000000000 2906519.05000000 PA USD 2906519.05000000 1.427406767137 Long RA CORP US N 2 Repurchase N 3.25000000 2026-05-01 2931500.00000000 USD 2964649.43000000 USD UST N N N Navitas Semiconductor Corp 529900T4K9WALWC76S49 63942X106 195017.00000000 NS USD 3217780.50000000 1.580268899617 Long EC CORP US N 1 N N N OSI Systems Inc DDX3MPX1Y8YD30050X33 671044105 9550.00000000 NS USD 2740086.00000000 1.345670622367 Long EC CORP US N 1 N N N Lindblad Expeditions Holdings Inc 549300GSPW24GZE6R597 535219109 151172.00000000 NS USD 2801217.16000000 1.375692456034 Long EC CORP US N 1 N N N Cardinal Infrastructure Group Inc N/A 14154A102 94472.00000000 NS USD 5009850.16000000 2.460363719524 Long EC CORP US N 1 N N N AAR Corp MP76T5YQX3YK5VVAQ802 000361105 24296.00000000 NS USD 2681549.52000000 1.316923049673 Long EC CORP US N 1 N N N Bel Fuse Inc 2549009L4XYDBRRY6X39 077347300 16447.00000000 NS USD 4536740.48000000 2.228017071450 Long EC CORP US N 1 N N N CECO Environmental Corp 5493002CZCTL4HGLIY91 125141101 54824.00000000 NS USD 4064651.36000000 1.996171625751 Long EC CORP US N 1 N N N Citibank NA E57ODZWZ7FF32TWEFA76 000000000 1640291.69000000 NS USD 1640291.69000000 0.805555861876 Long STIV RF US N 1 N N Sterling Infrastructure Inc 549300RZIK6K1215XU51 859241101 9123.00000000 NS USD 4704001.26000000 2.310159718769 Long EC CORP US N 1 N N N nLight Inc N/A 65487K100 28108.00000000 NS USD 1963343.80000000 0.964208449394 Long EC CORP US N 1 N N N Transcat Inc 54930081E40TSSHUOS40 893529107 18544.00000000 NS USD 1411198.40000000 0.693046944224 Long EC CORP US N 1 N N N Piper Sandler Cos QUQDBTUSOAKFEVMRMF78 724078209 30924.00000000 NS USD 2696572.80000000 1.324301061366 Long EC CORP US N 1 N N N American Public Education Inc 254900GZNX6TJQGM4S17 02913V103 23052.00000000 NS USD 1340473.80000000 0.658313721800 Long EC CORP US N 1 N N N Mama's Creations Inc N/A 56146T103 91252.00000000 NS USD 1294865.88000000 0.635915432808 Long EC CORP US N 1 N N N Enliven Therapeutics Inc N/A 29337E102 45526.00000000 NS USD 1877036.98000000 0.921822716908 Long EC CORP US N 1 N N N Praxis Precision Medicines Inc N/A 74006W207 8370.00000000 NS USD 2668607.10000000 1.310566959253 Long EC CORP US N 1 N N N Celcuity Inc 25490070W7UU7W2SEY87 15102K100 48918.00000000 NS USD 5936199.30000000 2.915298646294 Long EC CORP US N 1 N N N Nektar Therapeutics 5299005I24806IOIYE03 640268306 42431.00000000 NS USD 3608332.24000000 1.772070909858 Long EC CORP US N 1 N N N Cogent Biosciences Inc N/A 19240Q201 185508.00000000 NS USD 6639331.32000000 3.260610473354 Long EC CORP US N 1 N N N TAT Technologies Ltd N/A 000000000 30164.00000000 NS USD 1107320.44000000 0.543810882452 Long EC CORP IL N 1 N N N Aehr Test Systems 529900A4GWWZFRU2RE97 00760J108 70240.00000000 NS USD 6360934.40000000 3.123888284122 Long EC CORP US N 1 N N N Terawulf Inc 254900CVMW1SX2T78A64 88080T104 293736.00000000 NS USD 6382883.28000000 3.134667494341 Long EC CORP US N 1 N N CG oncology Inc N/A 156944100 14440.00000000 NS USD 963725.60000000 0.473290702534 Long EC CORP US N 1 N N N Pattern Group Inc 549300G1UQH42SPEGM03 70339W104 129755.00000000 NS USD 1747799.85000000 0.858353683761 Long EC CORP US N 1 N N N Aevex Corp N/A 00835T107 87583.00000000 NS USD 2649385.75000000 1.301127253339 Long EC CORP US N 1 N N N Legence Corp N/A 52476L109 74140.00000000 NS USD 6447214.40000000 3.166260845165 Long EC CORP US N 1 N N N Ouster Inc N/A 68989M202 41753.00000000 NS USD 1125660.88000000 0.552817968839 Long EC CORP US N 1 N N N Artivion Inc 549300YTKV8DMSMG6K81 228903100 34176.00000000 NS USD 1224526.08000000 0.601371187685 Long EC CORP US N 1 N N N Dave Inc 25490061SUVXCW51RZ82 23834J201 5208.00000000 NS USD 1416523.92000000 0.695662335060 Long EC CORP US N 1 N N N Navan Inc 254900RHRK35UPHTGY05 639193101 212222.00000000 NS USD 3711762.78000000 1.822866191150 Long EC CORP US N 1 N N N Mercury Systems Inc 549300P3B84SGK7HH679 589378108 40572.00000000 NS USD 3201536.52000000 1.572291395745 Long EC CORP US N 1 N N N PTC Therapeutics Inc 549300UJLWOIWFDGB318 69366J200 42655.00000000 NS USD 2775134.30000000 1.362883026531 Long EC CORP US N 1 N N N Mirum Pharmaceuticals Inc 254900YZKR40F7F27K81 604749101 43172.00000000 NS USD 4201067.32000000 2.063166220006 Long EC CORP US N 1 N N N Ondas Inc 549300JWLHDUB82V8607 68236H204 99745.00000000 NS USD 1001439.80000000 0.491812344185 Long EC CORP US N 1 N N Argan Inc 529900E4KZWBV9KGBS83 04010E109 4021.00000000 NS USD 2693989.58000000 1.323032428460 Long EC CORP US N 1 N N N 2026-05-19 LORD ABBETT SECURITIES TRUST Michael Hebert Michael Hebert Chief Financial Officer