SEC 13F Intelligence

Managers / Q4 2025 · view latest →

Gagnon Advisors, LLC

CIK 0001599466 · 1370 AVENUE OF THE AMERICAS, 26TH FLOOR, NEW YORK, NY, 10019 · 212-554-5050

Reported Value
$158M
Q4 2025
Positions
23
Filings on Record
32
2019–present window
Filed
Feb 13, 2026
original filing

Summary

Gagnon Advisors, LLC reported $158M in U.S.-listed holdings across 23 positions for Q4 2025.

Its largest position, WGS, represents 10.5% of the portfolio.

Compared with Q3 2025, the fund opened 0 new positions and exited 1.

Portfolio Metrics

Turnover
+10.5%
vs prior filed quarter
Top-10 Concentration
+65.2%
share of reported value
Largest Position
+10.5%
Genedx

Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.

Reported Value by Quarter

13F Reported Value
Q4 ’18: $142MQ4 ’18Q1 ’19: $175MQ2 ’19: $175MQ3 ’19: $161MQ4 ’19: $178MQ4 ’19Q1 ’20: $107MQ2 ’20: $139MQ3 ’20: $163MQ4 ’20: $222MQ4 ’20Q1 ’21: $474MQ2 ’21: $263MQ3 ’21: $252MQ4 ’21: $252MQ4 ’21Q1 ’22: $217MQ2 ’22: $165MQ3 ’22: $154MQ4 ’22: $148MQ4 ’22Q1 ’23: $149MQ2 ’23: $149MQ3 ’23: $120MQ4 ’23: $114MQ4 ’23Q1 ’24: $115MQ2 ’24: $131MQ3 ’24: $155MQ4 ’24: $156MQ4 ’24Q1 ’25: $142MQ2 ’25: $149MQ3 ’25: $162MQ4 ’25: $158MQ4 ’25Q1 ’26: $136Mfilingsflow.com

Portfolio Composition

By security type
Common Stock: 80.4%Other: 7.2%MLP: 6.9%REIT: 5.2%ADR: 0.3%
  • Common Stock · 80.4% · $127M
  • Other · 7.2% · $11M
  • MLP · 6.9% · $11M
  • REIT · 5.2% · $8M
  • ADR · 0.3% · $486,172

Quarter-over-Quarter Changes full breakdown →

vs Q3 2025 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
FIVNFIVE9 INCADDED+168.9K336.3K+$3M$7M
ASPNASPEN AEROGELS INCSOLD OUT−565.6K0−$4M$0
TMCITREACE MED CONCEPTS INCADDED+565.6K1.53M−$3M$4M
FRSHFRESHWORKS INCTRIMMED−564.9K564.9K−$6M$7M
DVDOUBLEVERIFY HLDGS INCTRIMMED−187.7K438.0K−$2M$5M
AMPLAMPLITUDE INCADDED+104.2K457.2K+$2M$5M
HZOMarineMax IncADDED+42.6K194.5K+$866,113$5M
PCRXPACIRA BIOSCIENCES INCADDED+47.5K260.9K+$1M$7M

Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.

Holdings — Q4 2025

23 positions
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1WGSGENEDX HOLDINGS CORPhistory →COM CL A10.49%$17M127.1K
2AMRCAMERESCO INChistory →CLA8.79%$14M472.8K
3ALAIR LEASE CORPhistory →CL A8.01%$13M196.5K
4EPDENTERPRISE PRODS PARTNERS L Phistory →COM6.92%$11M339.9K
5CDNACAREDX INChistory →COM6.37%$10M532.9K
6NAVIGATOR HLDGS LTDSHS5.69%$9M517.1K
7EQIXEQUINIX INChistory →COM5.21%$8M10.7K
8PRNPROFOUND MED CORPhistory →COM NEW4.81%$8M962.2K
9BLBLACKLINE INChistory →COM4.56%$7M130.1K
10FRSHFRESHWORKS INChistory →CLASS A COM4.39%$7M564.9K
11PCRXPACIRA BIOSCIENCES INChistory →COM4.29%$7M260.9K
12FIVNFIVE9 INChistory →COM4.28%$7M336.3K
13BLFSBIOLIFE SOLUTIONS INChistory →COM NEW4.21%$7M274.2K
14AMPLAMPLITUDE INChistory →COM CL A3.36%$5M457.2K
15DVDOUBLEVERIFY HLDGS INChistory →COM3.18%$5M438.0K
16HZOMarineMax Inchistory →COM2.99%$5M194.5K
17VERXVERTEX INChistory →CL A2.95%$5M232.5K
18TMCITREACE MED CONCEPTS INChistory →COM2.39%$4M1.53M
19NVDANVIDIA CORPORATIONhistory →COM1.96%$3M16.6K
20EP3OraSure Technologies Inchistory →COM1.86%$3M1.21M
21ALPHA & OMEGA SEMICONDUCTOR LTSHS1.51%$2M120.2K
22KLTRKALTURA INChistory →COM1.47%$2M1.41M
23CNFCNFINANCE HLDGS LTDSPON ADS0.31%$486,17280.4K

Filing History

QuarterReported ValuePositionsFiledTypeLinks
Q1 2026$136M22Apr 22, 202613F-HRchanges · EDGAR ↗
Q4 2025$158M23Feb 13, 202613F-HRchanges · EDGAR ↗
Q3 2025$162M24Nov 3, 202513F-HRchanges · EDGAR ↗
Q2 2025$149M24Jul 23, 202513F-HRchanges · EDGAR ↗
Q1 2025$142M28May 12, 202513F-HRchanges · EDGAR ↗
Q4 2024$156M26Jan 24, 202513F-HRchanges · EDGAR ↗
Q3 2024$155M27Nov 12, 202413F-HRchanges · EDGAR ↗
Q2 2024$131M27Aug 14, 202413F-HRchanges · EDGAR ↗
Q1 2024$115M27May 13, 202413F-HRchanges · EDGAR ↗
Q4 2023$114M26Feb 14, 202413F-HRchanges · EDGAR ↗
Q3 2023$120M28Nov 14, 202313F-HRchanges · EDGAR ↗
Q2 2023$149M29Aug 8, 202313F-HRchanges · EDGAR ↗
Q1 2023$149M28Apr 10, 202313F-HRchanges · EDGAR ↗
Q4 2022$148M29Feb 7, 202313F-HRchanges · EDGAR ↗
Q3 2022$154M32Nov 14, 202213F-HRchanges · EDGAR ↗
Q2 2022$165M33Aug 1, 202213F-HRchanges · EDGAR ↗
Q1 2022$217M33May 9, 202213F-HRchanges · EDGAR ↗
Q4 2021$252M34Feb 8, 202213F-HRchanges · EDGAR ↗
Q3 2021$252M35Nov 12, 202113F-HRchanges · EDGAR ↗
Q2 2021$263M32Jul 28, 202113F-HRchanges · EDGAR ↗
Q1 2021$474M30May 14, 202113F-HRchanges · EDGAR ↗
Q4 2020$222M29Feb 12, 202113F-HRchanges · EDGAR ↗
Q3 2020$163M30Nov 12, 202013F-HRchanges · EDGAR ↗
Q2 2020$139M26Aug 14, 2020RESTATEMENTchanges · EDGAR ↗
Q1 2020$107M27May 11, 202013F-HRchanges · EDGAR ↗
Q4 2019$178M32Feb 14, 202013F-HRchanges · EDGAR ↗
Q3 2019$161M32Nov 8, 201913F-HRchanges · EDGAR ↗
Q2 2019$175M33Aug 12, 201913F-HRchanges · EDGAR ↗
Q1 2019$175M33May 13, 201913F-HRchanges · EDGAR ↗
Q4 2018$142M31Jan 18, 201913F-HRchanges · EDGAR ↗

13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.