# GAGNON SECURITIES LLC: Form 13F holdings

An institutional investment manager in New York, NY. SEC CIK 1125725.

- Quarter ended: 2026-06-30
- Filed: 2026-08-05
- Reported value: $518.8m
- Positions: 83 (85 lines in the filing's table; lines for the same security and option type are added together here)
- Compared with: the 13F for the quarter ended 2026-03-31
- Filing: https://www.sec.gov/Archives/edgar/data/1125725/000101905626000123/

## Holdings

As filed, largest first. Reported value is what the manager stated at the quarter end (Jun 30, 2026), in US dollars; it is filing data, not a price. Weight is the share of the total reported value.

| Issuer | Class | Reported value | Weight | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | ---: | --- | --- |
| [CAREDX INC (CDNA)](/companies/cdna.md) | COM | $50.5m | 9.7% | 1,770,735 |  | Added +8,861 |
| [GENEDX HOLDINGS CORP (WGS)](/companies/wgs.md) | COM CL A | $36.0m | 6.9% | 524,865 |  | Added +221,716 |
| [ENSIGN GROUP INC (ENSG)](/companies/ensg.md) | COM | $27.9m | 5.4% | 173,911 |  | Reduced −5,760 |
| [AMERESCO INC (AMRC)](/companies/amrc.md) | CL A | $22.8m | 4.4% | 826,562 |  | Reduced −13,501 |
| [GENERAC HLDGS INC (GNRC)](/companies/gnrc.md) | COM | $21.4m | 4.1% | 73,170 |  | Reduced −1,743 |
| [ENTERPRISE PRODS PARTNERS L P (EPD)](/companies/epd.md) | COM | $18.8m | 3.6% | 510,576 |  | Reduced −3,681 |
| [QUIDELORTHO CORP (QDEL)](/companies/qdel.md) | COM NEW | $18.0m | 3.5% | 1,030,371 |  | Added +627,046 |
| [CHEESECAKE FACTORY INC (CAKE)](/companies/cake.md) | COM | $17.6m | 3.4% | 221,792 |  | Reduced −3,256 |
| [EQUINIX INC (EQIX)](/companies/eqix.md) | COM | $17.4m | 3.4% | 16,720 |  | Reduced −231 |
| [CARMAX INC (KMX)](/companies/kmx.md) | COM | $17.2m | 3.3% | 325,410 |  | Added +15,711 |
| [FRESHWORKS INC (FRSH)](/companies/frsh.md) | CLASS A COM | $15.8m | 3.1% | 1,563,866 |  | Reduced −167,501 |
| [PACIRA BIOSCIENCES INC (PCRX)](/companies/pcrx.md) | COM | $15.4m | 3.0% | 608,617 |  | Reduced −8,893 |
| [FIVE9 INC (FIVN)](/companies/fivn.md) | COM | $15.4m | 3.0% | 722,698 |  | Added +100,634 |
| [HINGE HEALTH INC (HNGE)](/companies/hnge.md) | CL A | $15.2m | 2.9% | 182,959 |  | Added +58,709 |
| BIOLIFE SOLUTIONS INC | COM NEW | $15.1m | 2.9% | 535,906 |  | Reduced −606 |
| [PROFOUND MED CORP (PROF)](/companies/prof.md) | COM | $13.0m | 2.5% | 1,960,074 |  | Added +15,750 |
| [CARGURUS INC (CARG)](/companies/carg.md) | COM CL A | $12.5m | 2.4% | 367,073 |  | Added +95,549 |
| [TREACE MED CONCEPTS INC (TMCI)](/companies/tmci.md) | COM | $12.1m | 2.3% | 3,029,543 |  | Reduced −2,172,343 |
| GAMBLING COM GROUP | ORDINARY SHARES | $11.7m | 2.3% | 765,179 |  | New +765,179 |
| [INTUITIVE SURGICAL INC (ISRG)](/companies/isrg.md) | COM NEW | $11.6m | 2.2% | 29,144 |  | Reduced −2,475 |
| [BLACKLINE INC (BL)](/companies/bl.md) | COM | $10.5m | 2.0% | 375,769 |  | Added +79,345 |
| [ASPEN AEROGELS INC (ASPN)](/companies/aspn.md) | COM | $9.7m | 1.9% | 1,535,812 |  | Reduced −326,039 |
| [PROTO LABS INC (PRLB)](/companies/prlb.md) | SPON ADS NEW | $9.5m | 1.8% | 116,283 |  | Added +5,394 |
| [VERTEX INC (VERX)](/companies/verx.md) | CL A | $8.7m | 1.7% | 761,026 |  | Added +292,806 |
| [AMPLITUDE INC (AMPL)](/companies/ampl.md) | COM CL A | $8.1m | 1.6% | 1,055,508 |  | Reduced −4,328 |
| [MarineMax Inc (HZO)](/companies/hzo.md) | COM | $7.7m | 1.5% | 211,480 |  | Reduced −9,130 |
| [OraSure Technologies Inc (OSUR)](/companies/osur.md) | COM | $7.1m | 1.4% | 1,592,147 |  | Reduced −122,244 |
| [DOUBLEVERIFY HLDGS INC (DV)](/companies/dv.md) | COM | $5.7m | 1.1% | 523,328 |  | Added +34,866 |
| [CELCUITY INC (CELC)](/companies/celc.md) | COM | $5.6m | 1.1% | 53,240 |  | Reduced −102 |
| [CHIPOTLE MEXICAN GRILL INC (CMG)](/companies/cmg.md) | COM | $5.3m | 1.0% | 155,463 |  | Reduced −2,386 |
| [CARETRUST REIT INC (CTRE)](/companies/ctre.md) | COM | $5.2m | 1.0% | 129,955 |  | Reduced −3,091 |
| [PENNANT GROUP INC (PNTG)](/companies/pntg.md) | COM | $5.0m | 1.0% | 135,035 |  | Reduced −2,449 |
| [WHITECAP RES INC (WCPRF)](/companies/wcprf.md) | COM NEW | $4.5m | 0.9% | 435,100 |  | Reduced −318 |
| [ICU MED INC (ICUI)](/companies/icui.md) | COM | $4.3m | 0.8% | 29,400 |  | Reduced −343 |
| [KALTURA INC (KLTR)](/companies/kltr.md) | COM | $4.2m | 0.8% | 3,266,999 |  | Reduced −11,937 |
| [MICROCHIP TECHNOLOGY INC. (MCHP)](/companies/mchp.md) | COM | $2.4m | 0.5% | 26,229 |  | Reduced −609 |
| [GENTEX CORP (GNTX)](/companies/gntx.md) | COM | $1.4m | 0.3% | 57,159 |  | Added +226 |
| [GLOBAL NET LEASE INC (GNL)](/companies/gnl.md) | COM NEW | $1.4m | 0.3% | 160,598 |  | Reduced −9,527 |
| [SL GREEN RLTY CORP (SLG)](/companies/slg.md) | COM | $1.3m | 0.3% | 25,862 |  | Unchanged |
| [BOSTON BEER INC (SAM)](/companies/sam.md) | CL A | $1.3m | 0.2% | 7,283 |  | Added +44 |
| [NCINO INC (NCNO)](/companies/ncno.md) | SPONSORED ADS | $1.2m | 0.2% | 75,333 |  | Reduced −4,187 |
| [FLAGSTAR BANK NATIONAL ASSOCIA (FLG)](/companies/flg.md) | COM NEW | $1.1m | 0.2% | 74,456 |  | Reduced −255 |
| [DIGITAL TURBINE INC (APPS)](/companies/apps.md) | COM NEW | $1.1m | 0.2% | 81,839 |  | Unchanged |
| [WEAVE COMMUNICATIONS INC (WEAV)](/companies/weav.md) | COM | $998.7k | 0.2% | 157,170 |  | Added +122,950 |
| [DOCUSIGN INC (DOCU)](/companies/docu.md) | COM | $928.6k | 0.2% | 20,906 |  | Reduced −326 |
| [CNFINANCE HLDGS LTD (CNF)](/companies/cnf.md) | SPON ADS | $920.6k | 0.2% | 332,345 |  | Added +18,407 |
| [ALPHABET INC (GOOGL)](/companies/googl.md) | CAP STK CL A | $913.4k | 0.2% | 2,556 |  | Unchanged |
| [MARVELL TECHNOLOGY INC (MRVL)](/companies/mrvl.md) | ORD | $870.7k | 0.2% | 2,923 |  | Reduced −3,902 |
| [Bio-Techne Corp (TECH)](/companies/tech.md) | COM | $864.0k | 0.2% | 12,230 |  | Added +2,351 |
| [DEVON ENERGY CORP (DVN)](/companies/dvn.md) | COM | $785.9k | 0.2% | 19,021 |  | Reduced −45 |
| [MICRON TECHNOLOGY INC (MU)](/companies/mu.md) | COM | $783.8k | 0.2% | 679 |  | Reduced −398 |
| NINTENDO LTD | COM | $740.7k | 0.1% | 70,675 |  | Added +978 |
| [Cognex Corp (CGNX)](/companies/cgnx.md) | COM | $709.6k | 0.1% | 9,798 |  | Added +18 |
| [NVIDIA CORPORATION (NVDA)](/companies/nvda.md) | COM | $699.9k | 0.1% | 3,498 |  | Reduced −157 |
| [COMMVAULT SYS INC (CVLT)](/companies/cvlt.md) | COM | $690.8k | 0.1% | 4,874 |  | Added +498 |
| [ALPHABET INC (GOOGL)](/companies/googl.md) | CAP STK CL C | $681.6k | 0.1% | 1,929 |  | Reduced −5 |
| [ONTO INNOVATION INC (ONTO)](/companies/onto.md) | COM | $646.8k | 0.1% | 1,709 |  | Reduced −533 |
| [AT&T INC (T)](/companies/t.md) | COM | $639.6k | 0.1% | 30,898 |  | Reduced −1,196 |
| [HIMAX TECHNOLOGIES INC (HIMX)](/companies/himx.md) | SPONSORED ADR | $605.9k | 0.1% | 39,498 |  | Reduced −5,275 |
| [PFIZER INC (PFE)](/companies/pfe.md) | COM NEW | $562.2k | 0.1% | 23,346 |  | Reduced −20,914 |
| [LIFE TIME GROUP HOLDINGS INC (LTH)](/companies/lth.md) | COMMON STOCK | $549.9k | 0.1% | 13,465 |  | Reduced −85 |
| [MACOM TECH SOLUTIONS HLDGS INC (MTSI)](/companies/mtsi.md) | COM | $487.3k | <0.1% | 1,281 |  | Reduced −2,389 |
| [VIAVI SOLUTIONS INC (VIAV)](/companies/viav.md) | COM | $476.8k | <0.1% | 9,986 |  | Reduced −4,525 |
| [META PLATFORMS INC (META)](/companies/meta.md) | CL A | $472.6k | <0.1% | 839 |  | Unchanged |
| [SHOPIFY INC (SHOP)](/companies/shop.md) | CL A SUB VTG SHS | $459.3k | <0.1% | 4,023 |  | Added +91 |
| [ETSY INC (ETSY)](/companies/etsy.md) | COM | $433.5k | <0.1% | 5,755 |  | Reduced −18 |
| [STARBUCKS CORP (SBUX)](/companies/sbux.md) | COM | $413.4k | <0.1% | 4,045 |  | Reduced −26 |
| [MERCK & CO INC (MRK)](/companies/mrk.md) | COM | $409.5k | <0.1% | 3,187 |  | Reduced −5 |
| CES ENERGY SOLUTIONS CORP | COM | $389.5k | <0.1% | 33,350 |  | Unchanged |
| [AKAMAI TECHNOLOGIES INC (AKAM)](/companies/akam.md) | COM | $373.9k | <0.1% | 3,163 |  | Added +267 |
| [WARBY PARKER INC (WRBY)](/companies/wrby.md) | CL A | $345.3k | <0.1% | 11,381 |  | New +11,381 |
| [RINGCENTRAL INC (RNG)](/companies/rng.md) | CL A | $332.0k | <0.1% | 8,517 |  | Added +95 |
| [VERICEL CORP (VCEL)](/companies/vcel.md) | COM | $324.9k | <0.1% | 7,303 |  | New +7,303 |
| BEYOND MEATS INC | COM | $286.0k | <0.1% | 381,271 |  | New +381,271 |
| [PLANET LABS PBC (PL)](/companies/pl.md) | COM CL A | $276.7k | <0.1% | 8,352 |  | Unchanged |
| [ELECTROVAYA INC (ELVA)](/companies/elva.md) | COM NEW | $276.2k | <0.1% | 26,307 |  | Added +50 |
| [REIN THERAPEUTICS INC (RNTX)](/companies/rntx.md) | COM NEW | $238.2k | <0.1% | 229,070 |  | Reduced −10,450 |
| [RAMBUS INC DEL (RMBS)](/companies/rmbs.md) | COM | $236.0k | <0.1% | 1,778 |  | Reduced −944 |
| [BLACKSTONE INC (BX)](/companies/bx.md) | COM | $228.3k | <0.1% | 1,940 |  | Unchanged |
| [MICROSOFT CORP (MSFT)](/companies/msft.md) | COM | $207.4k | <0.1% | 556 |  | Added +11 |
| [ACTINIUM PHARMACEUTICALS INC (ATNM)](/companies/atnm.md) | COM | $178.5k | <0.1% | 182,142 |  | Reduced −19,158 |
| [PATTERSON-UTI ENERGY INC (PTEN)](/companies/pten.md) | COM | $159.9k | <0.1% | 17,420 |  | Reduced −297,226 |
| [REDHILL BIOPHARMA LTD (RDHL)](/companies/rdhl.md) | SPONSORED ADR | $74.7k | <0.1% | 88,405 |  | Unchanged |

## Sold out

Held at the end of the quarter before and not reported this quarter.

| Issuer | Class | Reported value | Weight | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | ---: | --- | --- |
| ALPHA & OMEGA SEMICONDUCTOR LT | SHS | $0 | 0.0% | 0 |  | Sold out −167,874 |
| [EOG RES INC (EOG)](/companies/eog.md) | COM | $0 | 0.0% | 0 |  | Sold out −1,851 |
| GAMBLING COM GROUP LIMITED | ORDINARY SHARES | $0 | 0.0% | 0 |  | Sold out −109,697 |
| ISHARES TR | 0-3 MNTH TREASRY | $0 | 0.0% | 0 |  | Sold out −92,702 |
| NAVIGATOR HLDGS LTD | COM | $0 | 0.0% | 0 |  | Sold out −886,631 |
| [SAVERS VALUE VLG INC (SVV)](/companies/svv.md) | COM | $0 | 0.0% | 0 |  | Sold out −25,148 |

Source: SEC EDGAR, Form 13F-HR, accession 0001019056-26-000123. Last ingested by Listed: Oct 22, 2026, 05:26 ET. No prices; not investment advice.