0001019056-18-000597.txt : 20180509 0001019056-18-000597.hdr.sgml : 20180509 20180509171229 ACCESSION NUMBER: 0001019056-18-000597 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20180331 FILED AS OF DATE: 20180509 DATE AS OF CHANGE: 20180509 EFFECTIVENESS DATE: 20180509 FILER: COMPANY DATA: COMPANY CONFORMED NAME: GAGNON SECURITIES LLC CENTRAL INDEX KEY: 0001125725 IRS NUMBER: 134087058 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-06377 FILM NUMBER: 18819402 BUSINESS ADDRESS: STREET 1: 1370 AVENUE OF THE AMERICAS STREET 2: 24TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10019 BUSINESS PHONE: 2125545000 MAIL ADDRESS: STREET 1: 1370 AVENUE OF THE AMERICAS STREET 2: 24TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10019 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001125725 XXXXXXXX 03-31-2018 03-31-2018 false GAGNON SECURITIES LLC

1370 Avenue of the Americas 24th Floor New York NY 10019

13F HOLDINGS REPORT 028-06377 N Lisa Ferrante 212-554-5000 /s/ Lisa Ferrante New York NY 05-09-2018 0 95 280912 INFORMATION TABLE 2 infotable.xml ABERCROMBIE & FITCH CO CL A 002896207 285 11790 SH SOLE 0 0 11790 ACTUA CORP COM 005094107 35 30297 SH SOLE 0 0 30297 AIR LEASE CORP CL A 00912X302 16304 382544 SH SOLE 0 0 382544 AKAMAI TECHNOLOGIES INC COM 00971T101 1198 16875 SH SOLE 0 0 16875 ALPHA & OMEGA SEMICONDUCTOR LTD SHS G6331P104 6932 448679 SH SOLE 0 0 448679 AMBER ROAD INC COM 02318Y108 11150 1252785 SH SOLE 0 0 1252785 AMERESCO INC CL A 02361E108 12112 931711 SH SOLE 0 0 931711 AMERICAN EAGLE OUTFITTERS COM 02553E106 440 22053 SH SOLE 0 0 22053 ARCHER DANIELS MIDLAND COM 039483102 363 8361 SH SOLE 0 0 8361 ASPEN AEROGELS INC COM 04523Y105 170 39718 SH SOLE 0 0 39718 AT&T INC COM 00206R102 955 26788 SH SOLE 0 0 26788 ATHENAHEALTH INC COM 04685W103 5409 37816 SH SOLE 0 0 37816 ATLANTIC POWER CORP COM New 04878Q863 110 52464 SH SOLE 0 0 52464 BENEFITFOCUS INC COM 08180D106 402 16457 SH SOLE 0 0 16457 BURBERRY GROUP PLC COM G1700D105 436 18345 SH SOLE 0 0 18345 CAREDX INC COM 14167L103 14261 1789352 SH SOLE 0 0 1789352 CARMAX INC COM 143130102 1439 23232 SH SOLE 0 0 23232 CASTLIGHT HEALTH INC CL B 14862Q100 5197 1423741 SH SOLE 0 0 1423741 CELCUITY INC COM 15102K100 3452 209487 SH SOLE 0 0 209487 CES ENERGY SOLUTIONS CORP COM 15713J104 3971 870736 SH SOLE 0 0 870736 CHEESECAKE FACTORY INC COM 163072101 816 16914 SH SOLE 0 0 16914 CHEMBIO DIAGNOSTICS INC COM 163572209 1614 201698 SH SOLE 0 0 201698 CHIPOTLE MEXICAN GRILL INC COM 169656105 1492 4618 SH SOLE 0 0 4618 CHRISTOPHER & BANKS CORP COM 171046105 60 55911 SH SOLE 0 0 55911 COMMVAULT SYSTEMS INC COM 204166102 7698 134578 SH SOLE 0 0 134578 D R HORTON INC COM 23331A109 419 9550 SH SOLE 0 0 9550 DENA CO LTD COM J1257N107 705 39101 SH SOLE 0 0 39101 DENISON MINES CORPORATION COM 248356107 164 364808 SH SOLE 0 0 364808 DURECT CORP COM 266605104 2410 1126153 SH SOLE 0 0 1126153 ENTERPRISE PRODUCTS PARTNERS LP COM 293792107 1103 45070 SH SOLE 0 0 45070 EOG RESOURCES INC COM 26875P101 319 3026 SH SOLE 0 0 3026 EQUINIX INC COM PAR 29444U700 5122 12250 SH SOLE 0 0 12250 ERA GROUP INC COM 26885G109 122 13045 SH SOLE 0 0 13045 ETHAN ALLEN INTERIOR INC COM 297602104 577 25156 SH SOLE 0 0 25156 EVERBRIDGE INC COM 29978A104 9763 266760 SH SOLE 0 0 266760 EXXON MOBIL CORP COM 30231G102 847 11355 SH SOLE 0 0 11355 FIVE9 INC CL A 338307101 8925 299592 SH SOLE 0 0 299592 FLEXION THERAPEUTICS INC COM 33938J106 7395 329995 SH SOLE 0 0 329995 GENERAC HOLDINGS INC COM 368736104 1348 29366 SH SOLE 0 0 29366 GENERAL ELECTRIC CO CL A 369604103 961 71256 SH SOLE 0 0 71256 GENERAL FINANCE CORP COM 369822101 14295 1971772 SH SOLE 0 0 1971772 GENERAL FINANCE CORP SERIES C PREFERRED 369822507 3541 34759 SH SOLE 0 0 34759 GENTEX CORP CL A 371901109 1074 46639 SH SOLE 0 0 46639 GLOBAL X URANIUM GLOBAL X URANIUM 37954Y871 281 23255 SH SOLE 0 0 23255 HORNBECK OFFSHORE SERVICES INC COM 440543106 47 16175 SH SOLE 0 0 16175 HOVNANIAN ENTERPRISES INC COM 442487203 286 156495 SH SOLE 0 0 156495 INPHI CORPORATION COM 45772F107 415 13783 SH SOLE 0 0 13783 INSTRUCTURE INC COM 45781U103 10283 243964 SH SOLE 0 0 243964 JOHNSON & JOHNSON CL A 478160104 673 5250 SH SOLE 0 0 5250 KB HOME COM 48666K109 552 19396 SH SOLE 0 0 19396 KEANE GROUP INC COM 48669A108 1026 69315 SH SOLE 0 0 69315 LENNAR CORP COM 526057104 315 5341 SH SOLE 0 0 5341 LIVEPERSON INC COM 538146101 223 13627 SH SOLE 0 0 13627 LUMBER LIQUIDATORS HOLDINGS INC COM 55003T107 9445 394842 SH SOLE 0 0 394842 MACYS INC COM 55616P104 1994 67059 SH SOLE 0 0 67059 MAG SILVER CORP COM 55903q104 110 11244 SH SOLE 0 0 11244 MICROCHIP TECHNOLOGY INC COM 595017104 732 8011 SH SOLE 0 0 8011 MONSANTO CO COM 61166W101 875 7495 SH SOLE 0 0 7495 NAVIGATOR HOLDINGS LTD SHS Y62132108 9227 785242 SH SOLE 0 0 785242 NCS MULTISTAGE HOLDINGS INC COM 628877102 385 25698 SH SOLE 0 0 25698 NEOVASC INC COM 64065J106 259 4241897 SH SOLE 0 0 4241897 NETGEAR INC COM 64111Q104 1748 30563 SH SOLE 0 0 30563 NEW RELIC INC COM 64829B100 9903 133613 SH SOLE 0 0 133613 NINTENDO CO LTD SPONSORED ADR 654445303 2012 36691 SH SOLE 0 0 36691 OCADO GROUP PLC COM G6718L106 264 35488 SH SOLE 0 0 35488 PAN ORIENT ENERGY CORP COM 69806Y106 812 942934 SH SOLE 0 0 942934 PANDORA MEDIA INC COM 698354107 677 134572 SH SOLE 0 0 134572 PAYPAL HOLDINGS INC COM 70450Y103 223 2933 SH SOLE 0 0 2933 PFIZER INC COM 717081103 522 14708 SH SOLE 0 0 14708 PITNEY BOWES INC COM 724479100 343 31510 SH SOLE 0 0 31510 POWER SOLUTIONS INTL INC COM 73933G202 4174 564093 SH SOLE 0 0 564093 PROFOUND MED CORP COM 74319B106 2570 3416132 SH SOLE 0 0 3416132 QUIDEL CORP COM 74838J101 1556 30040 SH SOLE 0 0 30040 RANGE RESOURCES CORP COM 75281A109 188 12932 SH SOLE 0 0 12932 RED HAT INC COM 756577102 14700 98319 SH SOLE 0 0 98319 RUDOLPH TECH INC COM 781270103 7510 271102 SH SOLE 0 0 271102 SECUREWORKS CORP CL A 81374A105 3366 416641 SH SOLE 0 0 416641 STEALTHGAS INC SHS Y81669106 530 131539 SH SOLE 0 0 131539 SUNCOR ENERGY INC COM 867224107 10338 299309 SH SOLE 0 0 299309 SYNCHRONY FINANCIAL COM 87165B103 241 7192 SH SOLE 0 0 7192 SYSMEX CORP COM J7864H102 831 9269 SH SOLE 0 0 9269 T2 BIOSYSTEMS INC COM 89853L104 168 25819 SH SOLE 0 0 25819 TALEND SA ADS 874224207 8581 178321 SH SOLE 0 0 178321 TAPESTRY INC COM 876030107 1331 25299 SH SOLE 0 0 25299 THERAPEUTICSMD INC COM 88338N107 85 17473 SH SOLE 0 0 17473 TILE SHOP HLDGS INC COM COM 88677Q109 946 157721 SH SOLE 0 0 157721 UR ENERGY INC COM 91688R108 301 502016 SH SOLE 0 0 502016 URANIUM PARTICIPATION CORP COM 917017105 281 93916 SH SOLE 0 0 93916 WESTROCK CO COM 96145D105 210 3269 SH SOLE 0 0 3269 WILEY JOHN & SONS INC CL A 968223206 740 11614 SH SOLE 0 0 11614 WPX ENERGY INC COM 98212B103 10828 732632 SH SOLE 0 0 732632 WPX ENERGY INC PFD SER A CV 98212B202 210 3348 SH SOLE 0 0 3348 XEROX CORP COM 984121608 976 33911 SH SOLE 0 0 33911 XTREME DRILLING CORP COM 98419V100 143 85908 SH SOLE 0 0 85908 ZOGENIX INC COM 98978L204 1086 27126 SH SOLE 0 0 27126