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Gagnon Advisors, LLC

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13F filer, CIK 1599466, New York, NY

Gagnon Advisors, LLC reported $148,814,266 across 24 holdings for the quarter ended 2025-06-30, in a 13F-HR filed 2025-07-23. Its ten largest share positions make up 61.62% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001019056-25-000194

Period
2025-06-30
Reported value
$149M
Holdings
24
Top 10 weight
61.62%
New
1
Sold out
5

Part of the filer group GAGNON SECURITIES LLC

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
DVadded+245,180$3.67M
ASPNnew+565,570$3.35M
EQIXadded+2,937$2.34M
TMCIadded+340,379$2M
PCRXadded+80,012$1.91M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
PSIXreduced-143,079-$9.25M
VEREN INCexited-890,693-$5.9M
E2OPEN PARENT HOLDINGS INCexited-2,342,234-$4.68M
MXCTexited-934,196-$2.55M
IONQexited-105,589-$2.33M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q2 2025

Share positions as resolved from 13F-HR 0001019056-25-000194, largest first. % of portfolio is the value over $148,814,264, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
WGSGENEDX HOLDINGS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 255,059 shares; 2024Q4: 187,618 shares; 2025Q1: 127,062 shares; 2025Q2: 127,062 shares 127,062$11.7M7.88%0Timeline
PSIXPOWER SOLUTIONS INTL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 757,744 shares; 2024Q4: 470,165 shares; 2025Q1: 323,484 shares; 2025Q2: 180,405 shares 180,405$11.7M7.84%-143,079Timeline
ALAIR LEASE CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 196,479 shares; 2024Q4: 196,479 shares; 2025Q1: 196,479 shares; 2025Q2: 196,479 shares 196,479$11.5M7.72%0Timeline
EPDENTERPRISE PRODS PARTNERS LQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 339,877 shares; 2024Q4: 339,877 shares; 2025Q1: 339,877 shares; 2025Q2: 339,877 shares 339,877$10.5M7.08%0Timeline
CDNACAREDX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 412,875 shares; 2024Q4: 412,875 shares; 2025Q1: 412,875 shares; 2025Q2: 454,163 shares 454,163$8.87M5.96%+41,288Timeline
EQIXEQUINIX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,600 shares; 2024Q4: 6,600 shares; 2025Q1: 7,778 shares; 2025Q2: 10,715 shares 10,715$8.52M5.73%+2,937Timeline
BLBLACKLINE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 103,692 shares; 2024Q4: 103,692 shares; 2025Q1: 130,050 shares; 2025Q2: 130,050 shares 130,050$7.36M4.95%0Timeline
NVGSNAVIGATOR HLDGS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 517,066 shares; 2024Q4: 517,066 shares; 2025Q1: 517,066 shares; 2025Q2: 517,066 shares 517,066$7.32M4.92%0Timeline
AMRCAMERESCO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 205,948 shares; 2024Q4: 272,694 shares; 2025Q1: 472,798 shares; 2025Q2: 472,798 shares 472,798$7.18M4.83%0Timeline
FRSHFRESHWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 470,434 shares; 2024Q4: 470,434 shares; 2025Q1: 470,434 shares; 2025Q2: 470,434 shares 470,434$7.01M4.71%0Timeline
BLFSBIOLIFE SOLUTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 274,217 shares; 2024Q4: 274,217 shares; 2025Q1: 274,217 shares; 2025Q2: 274,217 shares 274,217$5.91M3.97%0Timeline
VERXVERTEX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 115,594 shares; 2024Q4: 115,594 shares; 2025Q1: 161,813 shares; 2025Q2: 161,813 shares 161,813$5.72M3.84%0Timeline
PROFPROFOUND MED CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 747,226 shares; 2024Q4: 896,671 shares; 2025Q1: 896,671 shares; 2025Q2: 896,671 shares 896,671$5.29M3.56%0Timeline
PCRXPACIRA BIOSCIENCES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 133,390 shares; 2024Q4: 133,390 shares; 2025Q1: 133,390 shares; 2025Q2: 213,402 shares 213,402$5.1M3.43%+80,012Timeline
TMCITREACE MED CONCEPTS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 489,891 shares; 2024Q4: 489,891 shares; 2025Q1: 489,891 shares; 2025Q2: 830,270 shares 830,270$4.88M3.28%+340,379Timeline
DVDOUBLEVERIFY HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 135,410 shares; 2024Q4: 67,705 shares; 2025Q1: 67,705 shares; 2025Q2: 312,885 shares 312,885$4.68M3.15%+245,180Timeline
EXASEXACT SCIENCES CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 86,972 shares; 2024Q4: 86,972 shares; 2025Q1: 86,972 shares; 2025Q2: 86,972 shares 86,972$4.62M3.11%0Timeline
FIVNFIVE9 INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 167,386 shares; 2024Q4: 167,386 shares; 2025Q1: 167,386 shares; 2025Q2: 167,386 shares 167,386$4.43M2.98%0Timeline
OSURORASURE TECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 797,277 shares; 2025Q2: 1,207,440 shares 1,207,440$3.62M2.43%+410,163Timeline
ASPNASPEN AEROGELS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 565,570 shares 565,570$3.35M2.25%newTimeline
AOSLALPHA & OMEGA SEMICONDUCTORQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 120,196 shares; 2024Q4: 120,196 shares; 2025Q1: 120,196 shares; 2025Q2: 120,196 shares 120,196$3.08M2.07%0Timeline
KLTRKALTURA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,029,708 shares; 2024Q4: 1,386,044 shares; 2025Q1: 1,386,044 shares; 2025Q2: 1,386,044 shares 1,386,044$2.79M1.87%0Timeline
NVDANVIDIA CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 16,555 shares; 2024Q4: 16,555 shares; 2025Q1: 16,555 shares; 2025Q2: 16,555 shares 16,555$2.62M1.76%0Timeline
CNFINANCE HLDGS LTDCNFINANCE HLDGS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 784,717 shares; 2024Q4: 784,717 shares; 2025Q1: 784,717 shares; 2025Q2: 1,569,434 shares 1,569,434$1.02M0.69%+784,717

Sold out in Q2 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
VEREN INCVEREN INC890,693$5.9Mshares
E2OPEN PARENT HOLDINGS INCE2OPEN PARENT HOLDINGS INC2,342,234$4.68Mshares
MXCTMAXCYTE INC934,196$2.55Mshares
IONQIONQ INC105,589$2.33Mshares
NCNONCINO INC77,511$2.13Mshares

How Q2 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001019056-25-000194 base2025-07-23acceptance time not in the bulk data set