SEC 13F Intelligence

Managers / Q4 2018 · view latest →

Gagnon Advisors, LLC

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

Reported Value
$142M
Q4 2018
Positions
31
Filings on Record
32
2019–present window
Filed
Jan 18, 2019
original filing

Summary

Gagnon Advisors, LLC reported $142M in U.S.-listed holdings across 31 positions for Q4 2018.

Its largest position, CDNA, represents 8.8% of the portfolio.

Portfolio Metrics

Top-10 Concentration
+56.7%
share of reported value
Largest Position
+8.8%
Caredx

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: 83.5%Other: 12.3%REIT: 2.0%ADR: 1.3%PUBLIC: 0.9%
  • Common Stock · 83.5% · $119M
  • Other · 12.3% · $18M
  • REIT · 2.0% · $3M
  • ADR · 1.3% · $2M
  • PUBLIC · 0.9% · $1M

Quarter-over-Quarter Changes full breakdown →

IssuerMoveShare ΔShares nowValue ΔValue now
CDNACAREDX INCNEW+496.7K496.7K+$12M$12M
RHT1EURRED HAT INCNEW+63.8K63.8K+$11M$11M
GFNGENERAL FIN CORP DELNEW+891.0K891.0K+$9M$9M
AMRCAMERESCO INCNEW+633.0K633.0K+$9M$9M
ALAIR LEASE CORPNEW+254.9K254.9K+$8M$8M
EVBGEUREVERBRIDGE INCNEW+124.1K124.1K+$7M$7M
NEWREURNEW RELIC INCNEW+80.4K80.4K+$7M$7M
INSTEURINSTRUCTURE INCNEW+169.8K169.8K+$6M$6M

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

Holdings — Q4 2018

30 positions
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1CDNACAREDX INChistory →COM8.78%$12M496.7K
2RHT1EURRED HAT INChistory →COM7.88%$11M63.8K
3GFNGENERAL FIN CORP DELCOM · SERIES C PREFERRED7.26%$10M904.4K
4AMRCAMERESCO INChistory →CLA6.27%$9M633.0K
5ALAIR LEASE CORPhistory →CL A5.41%$8M254.9K
6EVBGEUREVERBRIDGE INChistory →COM4.95%$7M124.1K
7NEWREURNEW RELIC INChistory →COM4.57%$7M80.4K
8INSTEURINSTRUCTURE INChistory →COM4.48%$6M169.8K
907SSECUREWORKS CORPhistory →CL A4.16%$6M350.3K
10RTECEURRUDOLPH TECH INChistory →COM3.89%$6M270.1K
11AMBRUSDAMBER ROAD INChistory →COM3.88%$6M671.2K
12ALPHA & OMEGA SEMICONDUCTORSHS3.79%$5M528.8K
13NAVIGATOR HOLDINGS LTDSHS3.52%$5M532.7K
14BLBLACKLINE INChistory →COM3.47%$5M120.4K
15SUSUNCOR ENERGYhistory →COM2.87%$4M146.2K
16PSIXPOWER SOLUTIONS INTL INChistory →COM2.83%$4M434.6K
17WPXUSDWPX ENERGY INChistory →COM2.76%$4M346.1K
18FIVNFIVE9 INChistory →COM2.61%$4M84.9K
19CELCCELCUITY INChistory →COM2.24%$3M132.6K
20LUMBER LIQUIDATORS HLDGSINCCOM2.10%$3M313.2K
21EQIXEQUINIX INChistory →COM PAR $0.0011.99%$3M8.0K
22CSLT1EURCASTLIGHT HEALTH INChistory →CL B1.78%$3M1.17M
23FLEXION THERAPEUTICS INCCOM1.68%$2M211.8K
24ZUOUSDZUORA INChistory →COM CL A1.51%$2M118.5K
25TALEND SAADS1.30%$2M49.8K
26HQ8FAPOLLO ENDOSURGERY INChistory →COM1.26%$2M519.8K
27CEMIUSDCHEMBIO DIAGNOSTICS INCCOM NEW0.99%$1M249.1K
28CNFINANCE HOLDINGS LIMITEDSPON ADS0.70%$1M181.6K
29POEEURPAN ORIENT ENERGY CORPCOM0.56%$800,000718.9K
30PROFOUND MED CORPCOM0.52%$736,0001.83M

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 ↗.