Gagnon Securities LLC 13F holdings
Gagnon Securities LLC reported 82 positions with a total reported value of $518.8M as of 2026-06-30, in its 13F for Q2 2026, filed 2026-08-05. Top holdings by reported value: CDNA CAREDX INC (9.7%), WGS GENEDX HOLDINGS CORP (6.9%), ENSG ENSIGN GROUP INC (5.4%), AMRC AMERESCO INC (4.4%), GNRC GENERAC HLDGS INC (4.1%). Against 2026-03-31 it opened 4 new positions and exited 6. Next 13F due by 2026-11-14, the legal deadline 45 days after the quarter ending 2026-09-30.
Email me when Gagnon Securities LLC files its 13F
A free account follows up to 10 funds. New 13F filings arrive in your daily or weekly digest. No password and no card.
Top holdings
25 largest of 82 positions · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| CDNA CAREDX INC | 1,770,735 | $50.5M | 9.7% |
| WGS GENEDX HOLDINGS CORP | 524,865 | $36.0M | 6.9% |
| ENSG ENSIGN GROUP INC | 173,911 | $27.9M | 5.4% |
| AMRC AMERESCO INC | 826,562 | $22.8M | 4.4% |
| GNRC GENERAC HLDGS INC | 73,170 | $21.4M | 4.1% |
| EPD ENTERPRISE PRODS PARTNERS L P | 510,576 | $18.8M | 3.6% |
| QDEL QUIDELORTHO CORP | 1,030,371 | $18.0M | 3.5% |
| CAKE CHEESECAKE FACTORY INC | 221,792 | $17.6M | 3.4% |
| EQIX EQUINIX INC | 16,720 | $17.4M | 3.4% |
| KMX CARMAX INC | 325,410 | $17.2M | 3.3% |
| FRSH FRESHWORKS INC | 1,563,866 | $15.8M | 3.1% |
| PCRX PACIRA BIOSCIENCES INC | 608,617 | $15.4M | 3.0% |
| FIVN FIVE9 INC | 722,698 | $15.4M | 3.0% |
| HNGE HINGE HEALTH INC | 182,959 | $15.2M | 2.9% |
| BLFS BIOLIFE SOLUTIONS INC | 535,906 | $15.1M | 2.9% |
| PROF PROFOUND MED CORP | 1,960,074 | $13.0M | 2.5% |
| CARG CARGURUS INC | 367,073 | $12.5M | 2.4% |
| TMCI TREACE MED CONCEPTS INC | 3,029,543 | $12.1M | 2.3% |
| GAMBLING COM GROUP | 765,179 | $11.7M | 2.3% |
| ISRG INTUITIVE SURGICAL INC | 29,144 | $11.6M | 2.2% |
| BL BLACKLINE INC | 375,769 | $10.5M | 2.0% |
| ASPN ASPEN AEROGELS INC | 1,535,812 | $9.7M | 1.9% |
| PRLB PROTO LABS INC | 116,283 | $9.5M | 1.8% |
| VERX VERTEX INC | 761,026 | $8.7M | 1.7% |
| AMPL AMPLITUDE INC | 1,055,508 | $8.1M | 1.6% |
SEC FORM 13F · Q2 2026 · VALUES AS REPORTED, NOT PRICES
New positions this quarter
Held at 2026-06-30, not at 2026-03-31 · 4 in all · reported value as of 2026-06-30
Sold out
Held at 2026-03-31, gone by 2026-06-30 · 6 in all · reported value as of 2026-03-31
Biggest increases and decreases
Positions held at both quarter ends, by change in shares · reported value as of 2026-06-30
Increases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| WGS GENEDX HOLDINGS CORP | 303,149 | 524,865 | +73.1% | $36.0M |
| QDEL QUIDELORTHO CORP | 403,325 | 1,030,371 | +155.5% | $18.0M |
| HNGE HINGE HEALTH INC | 124,250 | 182,959 | +47.3% | $15.2M |
| VERX VERTEX INC | 468,220 | 761,026 | +62.5% | $8.7M |
| CARG CARGURUS INC | 271,524 | 367,073 | +35.2% | $12.5M |
| BL BLACKLINE INC | 296,424 | 375,769 | +26.8% | $10.5M |
| FIVN FIVE9 INC | 622,064 | 722,698 | +16.2% | $15.4M |
| KMX CARMAX INC | 309,699 | 325,410 | +5.1% | $17.2M |
| WEAV WEAVE COMMUNICATIONS INC | 34,220 | 157,170 | +359.3% | $998.7K |
| PRLB PROTO LABS INC | 110,889 | 116,283 | +4.9% | $9.5M |
| DV DOUBLEVERIFY HLDGS INC | 488,462 | 523,328 | +7.1% | $5.7M |
| CDNA CAREDX INC | 1,761,874 | 1,770,735 | +0.5% | $50.5M |
Decreases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| TMCI TREACE MED CONCEPTS INC | 5,201,886 | 3,029,543 | -41.8% | $12.1M |
| PTEN PATTERSON-UTI ENERGY INC | 314,646 | 17,420 | -94.5% | $159.9K |
| ASPN ASPEN AEROGELS INC | 1,861,851 | 1,535,812 | -17.5% | $9.7M |
| FRSH FRESHWORKS INC | 1,731,367 | 1,563,866 | -9.7% | $15.8M |
| MRVL MARVELL TECHNOLOGY INC | 6,825 | 2,923 | -57.2% | $870.7K |
| ISRG INTUITIVE SURGICAL INC | 31,619 | 29,144 | -7.8% | $11.6M |
| ENSG ENSIGN GROUP INC | 179,671 | 173,911 | -3.2% | $27.9M |
| MTSI MACOM TECH SOLUTIONS HLDGS INC | 3,670 | 1,281 | -65.1% | $487.3K |
| OSUR OraSure Technologies Inc | 1,714,391 | 1,592,147 | -7.1% | $7.1M |
| GNRC GENERAC HLDGS INC | 74,913 | 73,170 | -2.3% | $21.4M |
| PFE PFIZER INC | 44,260 | 23,346 | -47.3% | $562.2K |
| MU MICRON TECHNOLOGY INC | 1,077 | 679 | -37.0% | $783.8K |
CIK 1125725 · 13F FILINGS ON EDGAR · INFORMATIONAL ONLY
