SEC 13F Intelligence

Managers / Q2 2021 · view latest →

Gagnon Advisors, LLC

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

Reported Value
$263M
Q2 2021
Positions
32
Filings on Record
32
2019–present window
Filed
Jul 28, 2021
original filing

Summary

Gagnon Advisors, LLC reported $263M in U.S.-listed holdings across 32 positions for Q2 2021.

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

Compared with Q1 2021, the fund opened 4 new positions and exited 2.

Portfolio Metrics

Turnover
+10.4%
vs prior filed quarter
Top-10 Concentration
+53.6%
share of reported value
Largest Position
+8.8%
Caredx
New / Exited
4 / 2
positions this quarter

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: 74.9%Other: 19.5%REIT: 2.8%MLP: 2.5%Equity WRT: 0.3%
  • Common Stock · 74.9% · $197M
  • Other · 19.5% · $51M
  • REIT · 2.8% · $7M
  • MLP · 2.5% · $7M
  • Equity WRT · 0.3% · $808,000

Quarter-over-Quarter Changes full breakdown →

vs Q1 2021 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
CM LIFE SCIENCES III INCUNIT 1 CL A & 1/5RNEW+259.7K259.7K+$3M$3M
MIROMATRIX MED INC COMNEW+229.8K229.8K+$3M$3M
OPSEUROPSENS INC COM ISIN#CA6838231083 SEDOL#B15NEW+978.7K978.7K+$2M$2M
E2OPEN PARENT HOLDINGSINC WTSEXP 02/04/202NEW+235.9K235.9K+$808,000$808,000
GFNGENERAL FINANCE CORPSOLD OUT−891.0K0−$11M$0
QUMUEURQUMU CORPSOLD OUT−197.4K0−$1M$0
YEXTYEXT INC COMADDED+235.4K651.5K+$3M$9M
LUMBER LIQUIDATORS HOLDINGSINCADDED+122.1K409.8K+$1M$9M

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

Holdings — Q2 2021

32 positions
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1CDNACAREDX INChistory →COM8.83%$23M254.0K
2AMRCAMERESCO INChistory →CLA8.14%$21M341.6K
3BLBLACKLINE INC COMhistory →COM5.24%$14M123.8K
4FIVNFIVE9 INC COM USD0.001history →COM5.15%$14M73.9K
5ALPHA AND OMEGA SEMICONDUCTORLTDSHS4.98%$13M430.8K
6PCRXPACIRA BIOSCIENCES COMhistory →COM4.92%$13M213.2K
7ONTOONTO INNOVATION INC COMhistory →COM4.15%$11M149.6K
8HQ8FAPOLLO ENDOSURGERY INCCOMhistory →COM4.09%$11M1.33M
9NAVIGATOR HOLDINGS LTDORD SHSSHS4.05%$11M973.8K
10ALAIR LEASE CORPhistory →CL A4.04%$11M254.9K
11EVBGEUREVERBRIDGE INC COMhistory →COM3.97%$10M76.7K
12YEXTYEXT INC COMhistory →CL A3.54%$9M651.5K
13BLFSBIOLIFE SOLUTIONS INChistory →COM NEW3.29%$9M194.8K
14LUMBER LIQUIDATORS HOLDINGSINCCOM3.29%$9M409.8K
15NEWREURNEW RELIC INC COMhistory →COM3.17%$8M124.6K
16CSLT1EURCASTLIGHT HEALTH INChistory →CL B2.96%$8M2.96M
17EQIXEQUINIX INC COMhistory →COM2.80%$7M9.2K
1807SSECUREWORKS CORP CL Ahistory →CL A2.63%$7M373.0K
19ETWOGBPE2OPEN PARENT HOLDINGSINC COM CL Ahistory →COM CL A2.58%$7M594.5K
20EPDENTERPRISE PRODS PARTNERSL P COMhistory →COM2.53%$7M276.0K
21CM LIFE SCIENCES INC UNITEXP 090125UNIT 9/1/20252.22%$6M370.4K
22DVNDEVON ENERGY CORP NEWhistory →COM1.98%$5M178.8K
23CM LIFE SCIENCES II INCUNIT EX 022528Unit 02/25/20281.88%$5M366.9K
24PRNPROFOUND MED CORP COMNPV(POST REV SPLIT) Ihistory →COM NEW1.72%$5M277.3K
25CELCCELCUITY INC COMhistory →COM1.71%$5M187.9K
26PSIXPOWER SOLUTIONS INTERNATIONALINChistory →COM1.45%$4M626.6K
27CM LIFE SCIENCES III INCUNIT 1 CL A & 1/5RUNIT 04/30/20281.08%$3M259.7K
28MIROMATRIX MED INC COMCOM1.02%$3M229.8K
29CNFINANCE HOLDINGS LIMITEDSPON ADS EACHREPSPON ADS0.94%$2M667.6K
30OPSEUROPSENS INC COM ISIN#CA6838231083 SEDOL#B15COM0.68%$2M978.7K
31TFF PHARMACEUTICALS INCCOMCOM0.64%$2M176.5K
32E2OPEN PARENT HOLDINGSINC WTSEXP 02/04/202W EXP 2/4/2000.31%$808,000235.9K

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 ↗.