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Disclosery

Gagnon Advisors, LLC

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13F filer, CIK 1599466, New York, NY

Gagnon Advisors, LLC reported $157,257,158 across 23 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-05. Its ten largest share positions make up 67.17% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001019056-26-000122

Period
2026-06-30
Reported value
$157M
Holdings
23
Top 10 weight
67.17%
New
4
Sold out
3

Part of the filer group GAGNON SECURITIES LLC

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
0new+328,488$6.12M
TMCInew+1,534,034$6.11M
QDELnew+241,097$4.22M
HNGEadded+32,517$2.7M
WGSadded+29,645$2.04M

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
NVGSexited-539,881-$10.4M
SGOVexited-95,621-$9.63M
AOSLexited-120,196-$2.66M

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 2026

Share positions as resolved from 13F-HR 0001019056-26-000122, largest first. % of portfolio is the value over $157,257,160, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
CDNACAREDX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 412,875 shares; 2024Q4: 412,875 shares; 2025Q1: 412,875 shares; 2025Q2: 454,163 shares; 2025Q3: 529,414 shares; 2025Q4: 532,892 shares; 2026Q1: 532,892 shares; 2026Q2: 546,893 shares 546,893$15.6M9.91%+14,001Timeline
AMRCAMERESCO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 205,948 shares; 2024Q4: 272,694 shares; 2025Q1: 472,798 shares; 2025Q2: 472,798 shares; 2025Q3: 472,798 shares; 2025Q4: 472,798 shares; 2026Q1: 472,798 shares; 2026Q2: 472,798 shares 472,798$13M8.3%0Timeline
EPDENTERPRISE PRODS PARTNERS LQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 339,877 shares; 2024Q4: 339,877 shares; 2025Q1: 339,877 shares; 2025Q2: 339,877 shares; 2025Q3: 339,877 shares; 2025Q4: 339,877 shares; 2026Q1: 339,877 shares; 2026Q2: 339,877 shares 339,877$12.5M7.94%0Timeline
WGSGENEDX HOLDINGS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 255,059 shares; 2024Q4: 187,618 shares; 2025Q1: 127,062 shares; 2025Q2: 127,062 shares; 2025Q3: 127,062 shares; 2025Q4: 127,062 shares; 2026Q1: 148,225 shares; 2026Q2: 177,870 shares 177,870$12.2M7.76%+29,645Timeline
EQIXEQUINIX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 6,600 shares; 2024Q4: 6,600 shares; 2025Q1: 7,778 shares; 2025Q2: 10,715 shares; 2025Q3: 10,715 shares; 2025Q4: 10,715 shares; 2026Q1: 10,715 shares; 2026Q2: 10,715 shares 10,715$11.2M7.1%0Timeline
HNGEHINGE HEALTH INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: 80,787 shares; 2026Q2: 113,304 shares 113,304$9.4M5.98%+32,517Timeline
PCRXPACIRA BIOSCIENCES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 133,390 shares; 2024Q4: 133,390 shares; 2025Q1: 133,390 shares; 2025Q2: 213,402 shares; 2025Q3: 213,402 shares; 2025Q4: 260,908 shares; 2026Q1: 352,637 shares; 2026Q2: 352,637 shares 352,637$8.95M5.69%0Timeline
FRSHFRESHWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 470,434 shares; 2024Q4: 470,434 shares; 2025Q1: 470,434 shares; 2025Q2: 470,434 shares; 2025Q3: 1,129,758 shares; 2025Q4: 564,879 shares; 2026Q1: 776,212 shares; 2026Q2: 776,212 shares 776,212$7.86M5%0Timeline
BLFSBIOLIFE SOLUTIONS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 274,217 shares; 2024Q4: 274,217 shares; 2025Q1: 274,217 shares; 2025Q2: 274,217 shares; 2025Q3: 274,217 shares; 2025Q4: 274,217 shares; 2026Q1: 274,217 shares; 2026Q2: 274,217 shares 274,217$7.74M4.92%0Timeline
FIVNFIVE9 INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 167,386 shares; 2024Q4: 167,386 shares; 2025Q1: 167,386 shares; 2025Q2: 167,386 shares; 2025Q3: 167,386 shares; 2025Q4: 336,277 shares; 2026Q1: 336,277 shares; 2026Q2: 336,277 shares 336,277$7.17M4.56%0Timeline
PROFPROFOUND MED CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 747,226 shares; 2024Q4: 896,671 shares; 2025Q1: 896,671 shares; 2025Q2: 896,671 shares; 2025Q3: 896,671 shares; 2025Q4: 962,186 shares; 2026Q1: 962,186 shares; 2026Q2: 962,186 shares 962,186$6.4M4.07%0Timeline
00Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 328,488 shares 328,488$6.12M3.89%new
TMCITREACE MED CONCEPTS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 489,891 shares; 2024Q4: 489,891 shares; 2025Q1: 489,891 shares; 2025Q2: 830,270 shares; 2025Q3: 968,464 shares; 2025Q4: 1,534,034 shares; 2026Q1: not reported; 2026Q2: 1,534,034 shares 1,534,034$6.11M3.88%newTimeline
OSURORASURE TECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 797,277 shares; 2025Q2: 1,207,440 shares; 2025Q3: 1,207,440 shares; 2025Q4: 1,207,440 shares; 2026Q1: 1,207,440 shares; 2026Q2: 1,207,440 shares 1,207,440$5.39M3.42%0Timeline
AMPLAMPLITUDE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 352,991 shares; 2025Q4: 457,212 shares; 2026Q1: 634,987 shares; 2026Q2: 634,987 shares 634,987$4.86M3.09%0Timeline
DVDOUBLEVERIFY HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 135,410 shares; 2024Q4: 67,705 shares; 2025Q1: 67,705 shares; 2025Q2: 312,885 shares; 2025Q3: 625,770 shares; 2025Q4: 438,039 shares; 2026Q1: 438,039 shares; 2026Q2: 438,039 shares 438,039$4.75M3.02%0Timeline
QDELQUIDELORTHO CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 241,097 shares 241,097$4.22M2.69%newTimeline
VERXVERTEX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 115,594 shares; 2024Q4: 115,594 shares; 2025Q1: 161,813 shares; 2025Q2: 161,813 shares; 2025Q3: 232,479 shares; 2025Q4: 232,479 shares; 2026Q1: 297,050 shares; 2026Q2: 361,621 shares 361,621$4.15M2.64%+64,571Timeline
BLBLACKLINE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 103,692 shares; 2024Q4: 103,692 shares; 2025Q1: 130,050 shares; 2025Q2: 130,050 shares; 2025Q3: 130,050 shares; 2025Q4: 130,050 shares; 2026Q1: 130,050 shares; 2026Q2: 130,050 shares 130,050$3.65M2.32%0Timeline
HZOMARINEMAX INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 151,845 shares; 2025Q4: 194,484 shares; 2026Q1: 97,242 shares; 2026Q2: 97,242 shares 97,242$3.56M2.26%0Timeline
KLTRKALTURA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 1,029,708 shares; 2024Q4: 1,386,044 shares; 2025Q1: 1,386,044 shares; 2025Q2: 1,386,044 shares; 2025Q3: 1,413,010 shares; 2025Q4: 1,413,010 shares; 2026Q1: 1,413,010 shares; 2026Q2: 1,413,010 shares 1,413,010$1.84M1.17%0Timeline
CNFCNFINANCE HLDGS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 80,359 shares; 2025Q4: 80,359 shares; 2026Q1: 80,359 shares; 2026Q2: 108,017 shares 108,017$299K0.19%+27,658Timeline
BYNDBEYOND MEAT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 388,880 shares 388,880$292K0.19%newTimeline

Sold out in Q2 2026

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

SecurityShares beforeValue beforeType
NVGSNAVIGATOR HLDGS LTD539,881$10.4Mshares
SGOVISHARES TR95,621$9.63Mshares
AOSLALPHA & OMEGA SEMICONDUCTOR120,196$2.66Mshares

How Q2 2026 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 0001019056-26-000122 base2026-08-05acceptance time not in the bulk data set

Filings

Every filing of this filer: 13F reports and notices, the 13D and 13G it filed or is a reporting person of, and Forms 3, 4 and 5 it reported as an owner.

FilingSubjectFiledAcceptedIngested
13F-HR 0001019056-26-000122 Quarter ended 2026-06-302026-08-05acceptance time not in the bulk data set
13F-HR 0001019056-26-000079 Quarter ended 2026-03-312026-04-22acceptance time not in the bulk data set
13F-HR 0001019056-26-000036 Quarter ended 2025-12-312026-02-13acceptance time not in the bulk data set
13F-HR 0001019056-25-000229 Quarter ended 2025-09-302025-11-03acceptance time not in the bulk data set
13F-HR 0001019056-25-000194 Quarter ended 2025-06-302025-07-23acceptance time not in the bulk data set
13F-HR 0001019056-25-000175 Quarter ended 2025-03-312025-05-12acceptance time not in the bulk data set
13F-HR 0001019056-25-000036 Quarter ended 2024-12-312025-01-24acceptance time not in the bulk data set
13F-HR 0001019056-24-000314 Quarter ended 2024-09-302024-11-12acceptance time not in the bulk data set
13F-HR 0001019056-24-000244 Quarter ended 2024-06-302024-08-14acceptance time not in the bulk data set
13F-HR 0001019056-24-000167 Quarter ended 2024-03-312024-05-13acceptance time not in the bulk data set
13F-HR 0001019056-24-000094 Quarter ended 2023-12-312024-02-14acceptance time not in the bulk data set
13F-HR 0001019056-23-000395 Quarter ended 2023-09-302023-11-14acceptance time not in the bulk data set
13F-HR 0001019056-23-000330 Quarter ended 2023-06-302023-08-08acceptance time not in the bulk data set
13F-HR 0001019056-23-000203 Quarter ended 2023-03-312023-04-10acceptance time not in the bulk data set
13F-HR 0001019056-23-000102 Quarter ended 2022-12-312023-02-07acceptance time not in the bulk data set
13F-HR 0001019056-22-000643 Quarter ended 2022-09-302022-11-14acceptance time not in the bulk data set
13F-HR 0001019056-22-000524 Quarter ended 2022-06-302022-08-01acceptance time not in the bulk data set
13F-HR 0001019056-22-000376 Quarter ended 2022-03-312022-05-09acceptance time not in the bulk data set
13F-HR 0001019056-22-000152 Quarter ended 2021-12-312022-02-08acceptance time not in the bulk data set
13F-HR 0001019056-21-000589 Quarter ended 2021-09-302021-11-12acceptance time not in the bulk data set
13F-HR/A 0001019056-21-000433 Quarter ended 2021-03-312021-07-28acceptance time not in the bulk data set
13F-HR 0001019056-21-000435 Quarter ended 2021-06-302021-07-28acceptance time not in the bulk data set
13F-HR 0001019056-21-000299 Quarter ended 2021-03-312021-05-14acceptance time not in the bulk data set
13F-HR 0001019056-21-000106 Quarter ended 2020-12-312021-02-12acceptance time not in the bulk data set
13F-HR 0001019056-20-000562 Quarter ended 2020-09-302020-11-12acceptance time not in the bulk data set
13F-HR/A 0001019056-20-000481 Quarter ended 2020-06-302020-08-14acceptance time not in the bulk data set
13F-HR 0001019056-20-000472 Quarter ended 2020-06-302020-08-13acceptance time not in the bulk data set
13F-HR 0001019056-20-000312 Quarter ended 2020-03-312020-05-11acceptance time not in the bulk data set
13F-HR 0001019056-20-000154 Quarter ended 2019-12-312020-02-14acceptance time not in the bulk data set
13F-HR 0001019056-19-000635 Quarter ended 2019-09-302019-11-08acceptance time not in the bulk data set
13F-HR 0001019056-19-000467 Quarter ended 2019-06-302019-08-12acceptance time not in the bulk data set
13F-HR 0001019056-19-000285 Quarter ended 2019-03-312019-05-13acceptance time not in the bulk data set
13F-HR 0001019056-19-000020 Quarter ended 2018-12-312019-01-18acceptance time not in the bulk data set
13F-HR 0001019056-18-001064 Quarter ended 2018-09-302018-11-13acceptance time not in the bulk data set
13F-HR 0001019056-18-000940 Quarter ended 2018-06-302018-08-09acceptance time not in the bulk data set
13F-HR 0001019056-18-000595 Quarter ended 2018-03-312018-05-09acceptance time not in the bulk data set
13F-HR 0001019056-18-000330 Quarter ended 2017-12-312018-02-13acceptance time not in the bulk data set
13F-HR 0001019056-17-000763 Quarter ended 2017-09-302017-11-14acceptance time not in the bulk data set
13F-HR 0001019056-17-000610 Quarter ended 2017-06-302017-07-20acceptance time not in the bulk data set
13F-HR 0001019056-17-000445 Quarter ended 2017-03-312017-05-11acceptance time not in the bulk data set
13F-HR 0001019056-17-000185 Quarter ended 2016-12-312017-02-14acceptance time not in the bulk data set
13F-HR 0001019056-16-001645 Quarter ended 2016-09-302016-11-14acceptance time not in the bulk data set
13F-HR/A 0001019056-16-001508 Quarter ended 2016-06-302016-08-24acceptance time not in the bulk data set
13F-HR 0001019056-16-001473 Quarter ended 2016-06-302016-08-10acceptance time not in the bulk data set
13F-HR 0001019056-16-001286 Quarter ended 2016-03-312016-05-03acceptance time not in the bulk data set
13F-HR 0001019056-16-001069 Quarter ended 2015-12-312016-02-16acceptance time not in the bulk data set
13F-HR 0001019056-15-000815 Quarter ended 2015-09-302015-10-16acceptance time not in the bulk data set
13F-HR 0001019056-15-000635 Quarter ended 2015-06-302015-07-24acceptance time not in the bulk data set
13F-HR 0001019056-15-000479 Quarter ended 2015-03-312015-05-12acceptance time not in the bulk data set
13F-HR 0001019056-15-000172 Quarter ended 2014-12-312015-02-13acceptance time not in the bulk data set
13F-HR 0001019056-14-001317 Quarter ended 2014-09-302014-10-15acceptance time not in the bulk data set
13F-HR 0001019056-14-000980 Quarter ended 2014-06-302014-07-31acceptance time not in the bulk data set
13F-HR 0001019056-14-000635 Quarter ended 2014-03-312014-05-06acceptance time not in the bulk data set
13F-HR 0001019056-14-000139 Quarter ended 2013-12-312014-02-06acceptance time not in the bulk data set