13F Filings History of Gagnon Advisors, LLC

Latest 13F report
Q3 2025 - 03 Nov 2025
Value $
$161,954,292
Signature - Title
Lisa Ferrante - Chief Compliance Officer
Location
New York, NY
Summary
This page shows a list of all the recent 13F filings made by Gagnon Advisors, LLC. Form 13F is required to be filed within 45 days of the end of a calendar quarter. Gagnon Advisors, LLC reported 24 stock holdings with total value $161,954,292 as of Q3 2025. Top holdings included AMRC, WGS, FRSH, AL, and EPD.

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Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q3 2025 24 $161,954,292 +$23,287,682 -$17,310,419 +$5,977,263 AMRC, WGS, FRSH, AL, EPD 13F-HR 03 Nov 2025, 15:31
Q2 2025 24 $148,814,264 +$15,815,852 -$26,845,136 -$11,029,284 WGS, PSIX, AL, EPD, CDNA 13F-HR 23 Jul 2025, 16:37
Q1 2025 28 $141,789,200 +$13,851,531 -$9,071,238 +$4,780,293 EPD, WGS, AL, PSIX, CDNA 13F-HR 12 May 2025, 09:35
Q4 2024 26 $156,191,331 +$8,490,037 -$28,265,613 -$19,775,576 WGS, PSIX, EPD, AL, CDNA 13F-HR 23 Jan 2025, 18:11
Q3 2024 27 $154,842,696 +$8,936,807 -$11,223,931 -$2,287,124 PSIX, CDNA, WGS, EPD, AL 13F-HR 12 Nov 2024, 06:00
Q2 2024 27 $131,346,135 +$12,493,523 -$3,296,314 +$9,197,209 EPD, CDNA, AL, NVGS, AOSL 13F-HR 14 Aug 2024, 13:00
Q1 2024 27 $115,263,592 +$12,282,160 -$9,937,338 +$2,344,822 AL, EPD, NVGS, BL, FIVN 13F-HR 13 May 2024, 17:15
Q4 2023 26 $114,479,578 +$5,569,458 -$14,209,979 -$8,640,521 AL, NVGS, EPD, FIVN, BL 13F-HR 14 Feb 2024, 17:14
Q3 2023 28 $119,536,528 +$377,082 -$13,114,400 -$12,737,318 AL, NVGS, EPD, ETWO, PROF 13F-HR 14 Nov 2023, 16:05
Q2 2023 29 $149,441,189 +$4,696,535 -$3,310,929 +$1,385,606 NVGS, AL, ETWO, NEWR, EPD 13F-HR 08 Aug 2023, 17:25
Q1 2023 28 $148,971,677 +$10,165,893 -$15,830,516 -$5,664,623 NVGS, AL, NEWR, ETWO, EPD 13F-HR 10 Apr 2023, 16:15
Q4 2022 29 $148,156,414 +$2,444,076 -$12,640,501 -$10,196,425 APEN, NVGS, AL, EPD, AMRC 13F-HR 07 Feb 2023, 16:41
Q3 2022 32 $154,430,000 +$12,160,628 -$18,924,984 -$6,764,356 NVGS, AMRC, PCRX, EPD, EVA 13F-HR 14 Nov 2022, 16:40
Q2 2022 33 $165,106,000 +$7,738,057 -$5,567,187 +$2,170,870 PCRX, NVGS, AL, EPD, EVA 13F-HR 01 Aug 2022, 16:29
Q1 2022 33 $217,085,000 +$25,467,278 -$26,457,269 -$989,991 PCRX, AMRC, AL, NVGS, EVA 13F-HR 09 May 2022, 17:08
Q4 2021 34 $251,685,000 +$12,149,616 -$12,184,758 -$35,142 AOSL, PCRX, AMRC, NEWR, AL 13F-HR 08 Feb 2022, 16:05
Q3 2021 35 $252,105,000 +$40,081,525 -$32,426,296 +$7,655,229 CDNA, BL, AMRC, AOSL, PCRX 13F-HR 12 Nov 2021, 16:39
Q2 2021 32 $263,102,000 +$16,699,163 -$24,855,419 -$8,156,256 CDNA, AMRC, BL, FIVN, AOSL 13F-HR 28 Jul 2021, 13:53
Q1 2021 30 $242,888,000 +$22,102,705 -$9,237,203 +$12,865,502 CDNA, AMRC, AOSL, PCRX, BL Restatement 28 Jul 2021, 13:51
Q4 2020 29 $222,461,000 +$7,466,471 -$4,557,000 +$2,909,471 CDNA, AMRC, BL, FIVN, AOSL 13F-HR 12 Feb 2021, 16:15
Q3 2020 29 $161,314,000 +$14,473,595 -$837,268 +$13,636,327 AMRC, CDNA, PCRX, BL, FIVN 13F-HR 12 Nov 2020, 16:10
Q2 2020 26 $138,944,000 +$3,735,029 -$14,500,705 -$10,765,676 AMRC, CDNA, BL, PCRX, NEWR Restatement 14 Aug 2020, 16:37
Q1 2020 27 $107,167,000 +$8,828,211 -$38,495,794 -$29,667,583 AMRC, CDNA, BL, PCRX, ONTO 13F-HR 11 May 2020, 16:05
Q4 2019 32 $178,379,000 +$8,556,033 -$31,323,543 -$22,767,510 AL, AMRC, GFN, EVBG, NVGS 13F-HR 14 Feb 2020, 16:07
Q3 2019 32 $161,282,000 +$5,227,988 -$5,714,459 -$486,471 AL, AMRC, EQIX, GFN, EVBG 13F-HR 08 Nov 2019, 16:10
Q2 2019 33 $175,183,000 +$12,922,756 -$9,961,236 +$2,961,520 EVBG, CDNA, AL, AMRC, EQIX 13F-HR 12 Aug 2019, 16:05
Q1 2019 33 $174,791,000 +$28,224,613 -$15,347,580 +$12,877,033 CDNA, AMRC, EVBG, AL, GFN 13F-HR 13 May 2019, 16:10
Q4 2018 31 $142,288,000 +$16,467,761 -$13,666,749 +$2,801,012 CDNA, RHT, GFN, AMRC, AL 13F-HR 18 Jan 2019, 16:11
Q3 2018 30 $166,888,000 +$8,807,437 -$16,375,388 -$7,567,951 CDNA, GFN, RHT, AMRC, AL 13F-HR 13 Nov 2018, 17:21
Q2 2018 29 $157,967,000 +$13,707,535 -$16,720,230 -$3,012,695 GFN, CDNA, RHT, NEWR, AL 13F-HR 09 Aug 2018, 16:28
Q1 2018 31 $134,384,000 +$4,217,479 -$16,704,455 -$12,486,976 GFN, RHT, AL, AMRC, CDNA 13F-HR 09 May 2018, 17:11
Q4 2017 30 $136,423,000 +$4,709,326 -$6,808,024 -$2,098,698 GFN, AL, FIVN, RHT, CDNA 13F-HR 13 Feb 2018, 14:49
Q3 2017 29 $128,425,000 +$13,872,207 -$11,977,082 +$1,895,125 GFN, FIVN, AL, RTEC, AMRC 13F-HR 14 Nov 2017, 12:21
Q2 2017 27 $115,944,000 +$12,343,962 -$9,343,581 +$3,000,381 GFN, AL, RHT, AMRC, FIVN 13F-HR 20 Jul 2017, 14:54
Q1 2017 27 $107,173,000 +$228,588 -$16,127,780 -$15,899,192 AL, GFN, LLFLQ, RHT, RTEC 13F-HR 11 May 2017, 16:38
Q4 2016 27 $118,610,000 +$7,007,577 -$18,862,779 -$11,855,202 AL, GFN, RTEC, RHT, AOSL 13F-HR 14 Feb 2017, 16:33
Q3 2016 28 $126,648,000 +$19,840,575 -$12,063,768 +$7,776,807 RTEC, AL, AOSL, RHT, GFN 13F-HR 14 Nov 2016, 16:34
Q2 2016 26 $110,347,000 +$17,156,986 -$18,851,488 -$1,694,502 RTEC, AL, RHT, EQIX, ATHN Restatement 24 Aug 2016, 10:24
Q1 2016 23 $113,370,000 +$6,735,736 -$21,298,344 -$14,562,608 AL, EQIX, RTEC, GFN, RHT 13F-HR 03 May 2016, 15:44
Q4 2015 23 $135,075,000 +$3,136,300 -$5,254,866 -$2,118,566 RHT, ATHN, EQIX, AL, RTEC 13F-HR 16 Feb 2016, 11:50
Q3 2015 23 $122,917,000 +$8,544,305 -$5,499,382 +$3,044,923 RHT, EQIX, ATHN, AL, RTEC 13F-HR 16 Oct 2015, 11:16
Q2 2015 23 $146,059,000 +$6,783,359 -$2,632,949 +$4,150,410 RHT, EQIX, AL, GFN, ATHN 13F-HR 24 Jul 2015, 10:47
Q1 2015 24 $115,699,000 +$9,598,360 -$5,547,769 +$4,050,591 GFN, EQIX, AL, CTCT, PSIX 13F-HR 12 May 2015, 17:27
Q4 2014 23 $166,116,000 +$18,432,269 -$20,520,966 -$2,088,697 GFN, EQIX, RHT, ATHN, CTCT 13F-HR 13 Feb 2015, 14:06
Q3 2014 26 $161,755,000 +$12,227,971 -$701 +$12,227,270 GFN, EQIX, ATHN, AL, RHT 13F-HR 15 Oct 2014, 16:26
Q2 2014 24 $159,969,000 +$6,339,011 -$22,489,090 -$16,150,079 GFN, AL, EQIX, CTCT, ATHN 13F-HR 31 Jul 2014, 15:01
Q1 2014 28 $176,537,000 +$20,433,306 -$27,657,156 -$7,223,850 GFN, AL, ATHN, EQIX, RHT 13F-HR 06 May 2014, 16:24
Q4 2013 28 $172,838,000 $0 $0 $0 NVDQ, GFN, ATHN, AL, RHT 13F-HR 06 Feb 2014, 16:02