GAGNON SECURITIES LLC

Name: GAGNON SECURITIES LLC: Form 13F holdings for the quarter ended 2026-06-30
Creator: Listed

An institutional investment manager in New York, NY. Its Form 13F for the quarter ended Jun 30, 2026, filed Aug 5, 2026. SEC CIK 1125725.

Share this page

Link

Story card, 1080 × 1920

Reported value$518.8m
Positions83

Holdings: 83 positions

The filing on sec.gov

As filed, largest first. Reported value is what the manager stated for each position at the quarter end, in US dollars; it is filing data, not a price. Weight is the position's share of the total reported value. Changes compare with the 13F for the quarter ended 2026-03-31. The filing's table has 85 lines; lines for the same security and option type are added together here.

GAGNON SECURITIES LLC, holdings
Issuer	Class	CUSIP	Reported value$m	Weight	Shares	Change on the quarter before
Caredx IncCDNA	COM	14167L103	50.5	9.7%	1,770,735	Added+8,861
Genedx Holdings CorpWGS	COM CL A	81663L200	36.0	6.9%	524,865	Added+221,716
Ensign Group IncENSG	COM	29358P101	27.9	5.4%	173,911	Reduced−5,760
Ameresco IncAMRC	CL A	02361E108	22.8	4.4%	826,562	Reduced−13,501
Generac Holdings IncGNRC	COM	368736104	21.4	4.1%	73,170	Reduced−1,743
Enterprise Prods Partners L PEPD	COM	293792107	18.8	3.6%	510,576	Reduced−3,681
Quidelortho CorpQDEL	COM NEW	219798105	18.0	3.5%	1,030,371	Added+627,046
Cheesecake Factory IncCAKE	COM	163072101	17.6	3.4%	221,792	Reduced−3,256
Equinix IncEQIX	COM	29444U700	17.4	3.4%	16,720	Reduced−231
Carmax IncKMX	COM	143130102	17.2	3.3%	325,410	Added+15,711
Freshworks IncFRSH	CLASS A COM	358054104	15.8	3.1%	1,563,866	Reduced−167,501
Pacira Biosciences IncPCRX	COM	695127100	15.4	3.0%	608,617	Reduced−8,893
FIVE9 IncFIVN	COM	338307101	15.4	3.0%	722,698	Added+100,634
Hinge Health IncHNGE	CL A	433313103	15.2	2.9%	182,959	Added+58,709
Biolife Solutions Inc	COM NEW	09062W204	15.1	2.9%	535,906	Reduced−606
Profound Med CorpPROF	COM	74319B502	13.0	2.5%	1,960,074	Added+15,750
Cargurus IncCARG	COM CL A	141788109	12.5	2.4%	367,073	Added+95,549
Treace Med Concepts IncTMCI	COM	89455T109	12.1	2.3%	3,029,543	Reduced−2,172,343
Gambling Com Group	ORDINARY SHARES	000000000	11.7	2.3%	765,179	New+765,179
Intuitive Surgical IncISRG	COM NEW	46120E602	11.6	2.2%	29,144	Reduced−2,475
Blackline IncBL	COM	09239B109	10.5	2.0%	375,769	Added+79,345
Aspen Aerogels IncASPN	COM	04523Y105	9.7	1.9%	1,535,812	Reduced−326,039
Proto Labs IncPRLB	SPON ADS NEW	743713109	9.5	1.8%	116,283	Added+5,394
Vertex IncVERX	CL A	92538J106	8.7	1.7%	761,026	Added+292,806
Amplitude IncAMPL	COM CL A	03213A104	8.1	1.6%	1,055,508	Reduced−4,328
MarineMax IncHZO	COM	567908108	7.7	1.5%	211,480	Reduced−9,130
OraSure Technologies IncOSUR	COM	68554V108	7.1	1.4%	1,592,147	Reduced−122,244
Doubleverify Holdings IncDV	COM	25862V105	5.7	1.1%	523,328	Added+34,866
Celcuity IncCELC	COM	15102K100	5.6	1.1%	53,240	Reduced−102
Chipotle Mexican Grill IncCMG	COM	169656105	5.3	1.0%	155,463	Reduced−2,386
Caretrust REIT IncCTRE	COM	14174T107	5.2	1.0%	129,955	Reduced−3,091
Pennant Group IncPNTG	COM	70805E109	5.0	1.0%	135,035	Reduced−2,449
Whitecap Res IncWCPRF	COM NEW	96467A200	4.5	0.9%	435,100	Reduced−318
ICU Med IncICUI	COM	44930G107	4.3	0.8%	29,400	Reduced−343
Kaltura IncKLTR	COM	483467106	4.2	0.8%	3,266,999	Reduced−11,937
Microchip Technology Inc.MCHP	COM	595017104	2.4	0.5%	26,229	Reduced−609
Gentex CorpGNTX	COM	371901109	1.4	0.3%	57,159	Added+226
Global Net Lease IncGNL	COM NEW	379378201	1.4	0.3%	160,598	Reduced−9,527
SL Green Rlty CorpSLG	COM	78440X887	1.3	0.3%	25,862	Unchanged
Boston Beer IncSAM	CL A	100557107	1.3	0.2%	7,283	Added+44
Ncino IncNCNO	SPONSORED ADS	63947X101	1.2	0.2%	75,333	Reduced−4,187
Flagstar Bank National AssociaFLG	COM NEW	649445400	1.1	0.2%	74,456	Reduced−255
Digital Turbine IncAPPS	COM NEW	25400W102	1.1	0.2%	81,839	Unchanged
Weave Communications IncWEAV	COM	94724R108	1.0	0.2%	157,170	Added+122,950
Docusign IncDOCU	COM	256163106	0.9	0.2%	20,906	Reduced−326
Cnfinance Holdings LtdCNF	SPON ADS	18979T204	0.9	0.2%	332,345	Added+18,407
Alphabet IncGOOGL	CAP STK CL A	02079K305	0.9	0.2%	2,556	Unchanged
Marvell Technology IncMRVL	ORD	573874104	0.9	0.2%	2,923	Reduced−3,902
Bio-Techne CorpTECH	COM	09073M104	0.9	0.2%	12,230	Added+2,351
Devon Energy CorpDVN	COM	25179M103	0.8	0.2%	19,021	Reduced−45
Micron Technology IncMU	COM	595112103	0.8	0.2%	679	Reduced−398
Nintendo Ltd	COM	654445303	0.7	0.1%	70,675	Added+978
Cognex CorpCGNX	COM	192422103	0.7	0.1%	9,798	Added+18
Nvidia CorporationNVDA	COM	67066G104	0.7	0.1%	3,498	Reduced−157
Commvault Sys IncCVLT	COM	204166102	0.7	0.1%	4,874	Added+498
Alphabet IncGOOGL	CAP STK CL C	02079K107	0.7	0.1%	1,929	Reduced−5
Onto Innovation IncONTO	COM	683344105	0.6	0.1%	1,709	Reduced−533
AT&T IncT	COM	00206R102	0.6	0.1%	30,898	Reduced−1,196
Himax Technologies IncHIMX	SPONSORED ADR	43289P106	0.6	0.1%	39,498	Reduced−5,275
Pfizer IncPFE	COM NEW	717081103	0.6	0.1%	23,346	Reduced−20,914
Life Time Group Holdings IncLTH	COMMON STOCK	53190C102	0.5	0.1%	13,465	Reduced−85
Macom Tech Solutions Holdings IncMTSI	COM	55405Y100	0.5	<0.1%	1,281	Reduced−2,389
Viavi Solutions IncVIAV	COM	925550105	0.5	<0.1%	9,986	Reduced−4,525
Meta Platforms IncMETA	CL A	30303M102	0.5	<0.1%	839	Unchanged
Shopify IncSHOP	CL A SUB VTG SHS	82509L107	0.5	<0.1%	4,023	Added+91
Etsy IncETSY	COM	29786A106	0.4	<0.1%	5,755	Reduced−18
Starbucks CorpSBUX	COM	855244109	0.4	<0.1%	4,045	Reduced−26
Merck & Co IncMRK	COM	58933Y105	0.4	<0.1%	3,187	Reduced−5
CES Energy Solutions Corp	COM	15713J104	0.4	<0.1%	33,350	Unchanged
Akamai Technologies IncAKAM	COM	00971T101	0.4	<0.1%	3,163	Added+267
Warby Parker IncWRBY	CL A	93403J106	0.3	<0.1%	11,381	New+11,381
Ringcentral IncRNG	CL A	76680R206	0.3	<0.1%	8,517	Added+95
Vericel CorpVCEL	COM	92346J108	0.3	<0.1%	7,303	New+7,303
Beyond Meats Inc	COM	08862EAB5	0.3	<0.1%	381,271	New+381,271
Planet Labs PBCPL	COM CL A	72703X106	0.3	<0.1%	8,352	Unchanged
Electrovaya IncELVA	COM NEW	28617B606	0.3	<0.1%	26,307	Added+50
Rein Therapeutics IncRNTX	COM NEW	00887A204	0.2	<0.1%	229,070	Reduced−10,450
Rambus Inc DelRMBS	COM	750917106	0.2	<0.1%	1,778	Reduced−944
Blackstone IncBX	COM	09260D107	0.2	<0.1%	1,940	Unchanged
Microsoft CorpMSFT	COM	594918104	0.2	<0.1%	556	Added+11
Actinium Pharmaceuticals IncATNM	COM	00507W206	0.2	<0.1%	182,142	Reduced−19,158
Patterson-Uti Energy IncPTEN	COM	703481101	0.2	<0.1%	17,420	Reduced−297,226
Redhill Biopharma LtdRDHL	SPONSORED ADR	757468301	0.1	<0.1%	88,405	Unchanged

Sold out: 6 positions

Held at the end of the quarter before and not reported this quarter.

GAGNON SECURITIES LLC, positions sold out
Issuer	Class	CUSIP	Weight	Change on the quarter before
Alpha & Omega Semiconductor LT	SHS	G6331P104	0.0%	Sold out−167,874
EOG Res IncEOG	COM	26875P101	0.0%	Sold out−1,851
Gambling Com Group Limited	ORDINARY SHARES	G3R239101	0.0%	Sold out−109,697
Ishares TR	0-3 MNTH TREASRY	46436E718	0.0%	Sold out−92,702
Navigator Holdings Ltd	COM	Y62132108	0.0%	Sold out−886,631
Savers Value VLG IncSVV	COM	80517M109	0.0%	Sold out−25,148

Source: SEC EDGAR, Form 13F-HR, accession 0001019056-26-000123 (on sec.gov). Last ingested by Listed: Oct 22, 2026, 05:26 ET. Listed shows no prices and gives no investment advice.