Gagnon Advisors, LLC — 13F Holdings & Portfolio
CIK 1599466 · latest 13F-HR filed 2026-04-22
Gagnon Advisors, LLC manages $135.9M in 13F-reported U.S. long-equity assets across 22 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are EPD (9.46%), AMRC (8.87%), EQIX (7.73%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 2 new positions, exited 3, added to 6, and trimmed 14.
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.
$135.9M
Long-equity book
22
Distinct positions
2026-03-31
Filed 2026-04-22
+2 / −3 / ↑6 / ↓14
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- EQUINIX INC$2.3M +27.9%
- ENTERPRISE PRODS PARTNERS L P$2.0M +18.0%
- NAVIGATOR HLDGS LTD$1.5M +16.5%
- PACIRA BIOSCIENCES INC$1.2M +18.0%
- OraSure Technologies Inc$700.3K +24.0%
Top Trims
- GENEDX HOLDINGS CORP-$7.0M -42.4%
- BLACKLINE INC-$2.4M -33.1%
- MarineMax Inc-$2.1M -44.2%
- AMERESCO INC-$1.8M -12.9%
- FIVE9 INC-$1.6M -24.3%
Exited Positions
- AIR LEASE CORP$12.6M
- TREACE MED CONCEPTS INC$3.8M
- NVIDIA CORPORATION$3.1M
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 | ENTERPRISE PRODS PARTNERS L P | EPD | 293792107 | $12.9M | 9.46% | 339,877 | SH |
| 2 | AMERESCO INC | AMRC | 02361E108 | $12.1M | 8.87% | 472,798 | SH |
| 3 | EQUINIX INC | EQIX | 29444U700 | $10.5M | 7.73% | 10,715 | SH |
| 4 | NAVIGATOR HLDGS LTD | NVGS | Y62132108 | $10.4M | 7.68% | 539,881 | SH |
| 5 | ISHARES TR | SGOV | 46436E718 | $9.6M | 7.08% | 95,621 | SH |
| 6 | GENEDX HOLDINGS CORP | WGS | 81663L200 | $9.5M | 7.00% | 148,225 | SH |
| 7 | CAREDX INC | CDNA | 14167L103 | $9.3M | 6.81% | 532,892 | SH |
| 8 | PACIRA BIOSCIENCES INC | PCRX | 695127100 | $8.0M | 5.86% | 352,637 | SH |
| 9 | PROFOUND MED CORP | PROF | 74319B502 | $6.2M | 4.59% | 962,186 | SH |
| 10 | FRESHWORKS INC | FRSH | 358054104 | $6.2M | 4.59% | 776,212 | SH |
| 11 | BIOLIFE SOLUTIONS INC | BLFS | 09062W204 | $5.2M | 3.85% | 274,217 | SH |
| 12 | FIVE9 INC | FIVN | 338307101 | $5.1M | 3.75% | 336,277 | SH |
| 13 | BLACKLINE INC | BL | 09239B109 | $4.8M | 3.54% | 130,050 | SH |
| 14 | AMPLITUDE INC | AMPL | 03213A104 | $4.3M | 3.19% | 634,987 | SH |
| 15 | DOUBLEVERIFY HLDGS INC | DV | 25862V105 | $4.2M | 3.06% | 438,039 | SH |
| 16 | OraSure Technologies Inc | OSUR | 68554V108 | $3.6M | 2.66% | 1,207,440 | SH |
| 17 | VERTEX INC | VERX | 92538J106 | $3.5M | 2.60% | 297,050 | SH |
| 18 | HINGE HEALTH INC | HNGE | 433313103 | $3.1M | 2.29% | 80,787 | SH |
| 19 | ALPHA & OMEGA SEMICONDUCTOR LT | AOSL | G6331P104 | $2.7M | 1.96% | 120,196 | SH |
| 20 | MarineMax Inc | HZO | 567908108 | $2.6M | 1.94% | 97,242 | SH |
| 21 | KALTURA INC | KLTR | 483467106 | $1.7M | 1.27% | 1,413,010 | SH |
| 22 | CNFINANCE HLDGS LTD | CNF | 18979T204 | $314.2K | 0.23% | 80,359 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-04-22 | $135.9M | 22 | 0001019056-26-000079 |
| 2025-12-31 | 2026-02-13 | $157.5M | 23 | 0001019056-26-000036 |