Gagnon Advisors, LLC — 13F Holdings & Portfolio
CIK 1599466 · latest 13F-HR filed 2026-08-05
Gagnon Advisors, LLC manages $157.3M in 13F-reported U.S. long-equity assets across 23 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are CDNA (9.91%), AMRC (8.30%), EPD (7.94%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 4 new positions and exited 3; 15 existing positions rose in reported value and 1 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-08-05
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
| Name | Title / Status | Ownership | Type |
|---|
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- CAREDX INC$6.3M +68.5%
- HINGE HEALTH INC$6.3M +201.9%
- GENEDX HOLDINGS CORP$2.7M +28.3%
- BIOLIFE SOLUTIONS INC$2.5M +48.0%
- FIVE9 INC$2.1M +40.5%
New Positions
- NAVIGATOR HLDGS LTD$6.1M
- TREACE MED CONCEPTS INC$6.1M
- QUIDELORTHO CORP$4.2M
- BEYOND MEAT INC$291.7K
Exited Positions
- NAVIGATOR HLDGS LTD$10.4M
- ISHARES TR$9.6M
- ALPHA & OMEGA SEMICONDUCTOR LT$2.7M
Gagnon Advisors, LLC Holdings (2026-06-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | CAREDX INC | CDNA | 14167L103 | $15.6M | 9.91% | 546,893 | SH |
| 2 | AMERESCO INC | AMRC | 02361E108 | $13.0M | 8.30% | 472,798 | SH |
| 3 | ENTERPRISE PRODS PARTNERS L P | EPD | 293792107 | $12.5M | 7.94% | 339,877 | SH |
| 4 | GENEDX HOLDINGS CORP | WGS | 81663L200 | $12.2M | 7.76% | 177,870 | SH |
| 5 | EQUINIX INC | EQIX | 29444U700 | $11.2M | 7.10% | 10,715 | SH |
| 6 | HINGE HEALTH INC | HNGE | 433313103 | $9.4M | 5.98% | 113,304 | SH |
| 7 | PACIRA BIOSCIENCES INC | PCRX | 695127100 | $8.9M | 5.69% | 352,637 | SH |
| 8 | FRESHWORKS INC | FRSH | 358054104 | $7.9M | 5.00% | 776,212 | SH |
| 9 | BIOLIFE SOLUTIONS INC | BLFS | 09062W204 | $7.7M | 4.92% | 274,217 | SH |
| 10 | FIVE9 INC | FIVN | 338307101 | $7.2M | 4.56% | 336,277 | SH |
| 11 | PROFOUND MED CORP | PROF | 74319B502 | $6.4M | 4.07% | 962,186 | SH |
| 12 | NAVIGATOR HLDGS LTD | WSDDF | 000000000 | $6.1M | 3.89% | 328,488 | SH |
| 13 | TREACE MED CONCEPTS INC | TMCI | 89455T109 | $6.1M | 3.88% | 1,534,034 | SH |
| 14 | OraSure Technologies Inc | OSUR | 68554V108 | $5.4M | 3.42% | 1,207,440 | SH |
| 15 | AMPLITUDE INC | AMPL | 03213A104 | $4.9M | 3.09% | 634,987 | SH |
| 16 | DOUBLEVERIFY HLDGS INC | DV | 25862V105 | $4.7M | 3.02% | 438,039 | SH |
| 17 | QUIDELORTHO CORP | QDEL | 219798105 | $4.2M | 2.69% | 241,097 | SH |
| 18 | VERTEX INC | VERX | 92538J106 | $4.2M | 2.64% | 361,621 | SH |
| 19 | BLACKLINE INC | BL | 09239B109 | $3.7M | 2.32% | 130,050 | SH |
| 20 | MarineMax Inc | HZO | 567908108 | $3.6M | 2.26% | 97,242 | SH |
| 21 | KALTURA INC | KLTR | 483467106 | $1.8M | 1.17% | 1,413,010 | SH |
| 22 | CNFINANCE HLDGS LTD | CNF | 18979T204 | $299.2K | 0.19% | 108,017 | SH |
| 23 | BEYOND MEAT INC | BYND | 08862E109 | $291.7K | 0.19% | 388,880 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-05 | $157.3M | 23 | 0001019056-26-000122 |
| 2026-03-31 | 2026-04-22 | $135.9M | 22 | 0001019056-26-000079 |
| 2025-12-31 | 2026-02-13 | $157.5M | 23 | 0001019056-26-000036 |
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