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SEC Form 13F

GAGNON SECURITIES LLC 13F Holdings

Inspect GAGNON SECURITIES LLC's 2026-06-30 SEC 13F positions, public filing date, amendments and original receipt.

As of 2026-08-06T03:59:59.999Z

Report period
2026-06-30
Publicly available
2026-08-06
Reported value
$518,827,272
Positions
85
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Disclosed positions

Largest disclosed position values

Scale: 0 to 50,466,000 USD · zero baseline

Largest disclosed position values

  • CDNA · COM+50,465,960 USD
  • WGS · COM CL A+36,031,982 USD
  • ENSG · COM+27,877,933 USD
  • AMRC · CL A+22,813,111 USD
  • GNRC · COM+21,424,908 USD
  • EPD · COM+18,768,774 USD
  • QDEL · COM NEW+18,046,948 USD
  • CAKE · COM+17,641,336 USD
  • EQIX · COM+17,428,761 USD
  • KMX · COM+17,210,935 USD

Reported underlying-position values for 2026-06-30, publicly available 2026-08-06. Put/call values are not option premiums; this subset is not a complete portfolio allocation. Exact issuer, class and unit remain in the table. Showing the first 10 of 50 recorded values; the complete table remains available below.

Inspect all 50 displayed rows: Disclosed positions

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CAREDX INCCDNACOM$50,465,9601,770,735SHNone
GENEDX HOLDINGS CORPWGSCOM CL A$36,031,982524,865SHNone
ENSIGN GROUP INCENSGCOM$27,877,933173,911SHNone
AMERESCO INCAMRCCL A$22,813,111826,562SHNone
GENERAC HLDGS INCGNRCCOM$21,424,90873,170SHNone
ENTERPRISE PRODS PARTNERS L PEPDCOM$18,768,774510,576SHNone
QUIDELORTHO CORPQDELCOM NEW$18,046,9481,030,371SHNone
CHEESECAKE FACTORY INCCAKECOM$17,641,336221,792SHNone
EQUINIX INCEQIXCOM$17,428,76116,720SHNone
CARMAX INCKMXCOM$17,210,935325,410SHNone
FRESHWORKS INCFRSHCLASS A COM$15,826,3241,563,866SHNone
PACIRA BIOSCIENCES INCPCRXCOM$15,440,613608,617SHNone
FIVE9 INCFIVNCOM$15,407,921722,698SHNone
HINGE HEALTH INCHNGECL A$15,185,597182,959SHNone
BIOLIFE SOLUTIONS INCBLFSCOM NEW$15,133,985535,906SHNone
PROFOUND MED CORPPROFCOM$13,034,4921,960,074SHNone
CARGURUS INCCARGCOM CL A$12,513,519367,073SHNone
TREACE MED CONCEPTS INCTMCICOM$12,057,5813,029,543SHNone
INTUITIVE SURGICAL INCISRGCOM NEW$11,589,99129,144SHNone
NAVIGATOR HLDGS LTDUnresolvedCOM$11,407,149612,300SHNone
BLACKLINE INCBLCOM$10,547,836375,769SHNone
ASPEN AEROGELS INCASPNCOM$9,737,0481,535,812SHNone
PROTO LABS INCPRLBSPON ADS NEW$9,478,227116,283SHNone
VERTEX INCVERXCL A$8,736,578761,026SHNone
AMPLITUDE INCAMPLCOM CL A$8,074,6361,055,508SHNone
MarineMax IncHZOCOM$7,744,398211,480SHNone
OraSure Technologies IncOSURCOM$7,100,9761,592,147SHNone
DOUBLEVERIFY HLDGS INCDVCOM$5,672,876523,328SHNone
CELCUITY INCCELCCOM$5,569,96953,240SHNone
CHIPOTLE MEXICAN GRILL INCCMGCOM$5,285,742155,463SHNone
CARETRUST REIT INCCTRECOM$5,243,684129,955SHNone
PENNANT GROUP INCPNTGCOM$4,989,543135,035SHNone
WHITECAP RES INCUnresolvedCOM NEW$4,517,373435,100SHNone
ICU MED INCICUICOM$4,310,04029,400SHNone
KALTURA INCKLTRCOM$4,247,0993,266,999SHNone
MICROCHIP TECHNOLOGY INC.MCHPCOM$2,392,10226,229SHNone
GENTEX CORPGNTXCOM$1,444,41957,159SHNone
GLOBAL NET LEASE INCGNLCOM NEW$1,435,746160,598SHNone
SL GREEN RLTY CORPSLGCOM$1,338,87625,862SHNone
BOSTON BEER INCSAMCL A$1,289,3097,283SHNone
NCINO INCNCNOSPONSORED ADS$1,231,69575,333SHNone
FLAGSTAR BANK NATIONAL ASSOCIAFLGCOM NEW$1,112,37274,456SHNone
DIGITAL TURBINE INCAPPSCOM NEW$1,055,72381,839SHNone
DOCUSIGN INCDOCUCOM$928,64520,906SHNone
CNFINANCE HLDGS LTDCNFSPON ADS$920,596332,345SHNone
ALPHABET INCGOOGLCAP STK CL A$913,4382,556SHNone
MARVELL TECHNOLOGY INCMRVLORD$870,7342,923SHNone
Bio-Techne CorpTECHCOM$864,05012,230SHNone
DEVON ENERGY CORPDVNCOM$785,94819,021SHNone
MICRON TECHNOLOGY INCMUCOM$783,763679SHNone

Largest 50 positions by reported value; the filing may contain more positions.

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CAREDX INCCDNACOM$50,465,9601,770,735SHNone

First displayed source row from Disclosed positions. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-06-30 and its public availability date is 2026-08-06. Subtracting those calendar dates gives 37 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

Read the amount together with its Unit and Option columns. A reported put or call position is not an option premium paid, and a quarterly holding is not a purchase made on its public filing date. Check every accession in the effective amendment lineage below: a retained holding can originate in an earlier filing rather than the latest linked amendment.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

How amendments affect these holdings

This view uses 1 effective filing version(s). A restatement replaces the previous book; a new-holdings amendment adds positions. 4 positions lack a resolved ticker and 0 positions are put or call entries.

The displayed holdings combine the effective filing versions listed here. The latest receipt linked below identifies the current projection version; it is not proof that every retained holding originated in that latest amendment. Inspect all effective accessions when verifying a position's source.

A 13F is a delayed quarterly snapshot of disclosed holdings. It is not a complete trade ledger and does not reveal every position in a manager's portfolio. Option values refer to the reported underlying position rather than a traded option premium.

Show the table · 1 row, 2 columns
Effective SEC accessionRole in this view
0001019056-26-000123Latest effective version

Quarter end and public filing date

Use the filing's public availability date when constructing a historical observation. The quarter-end report period is earlier and cannot be substituted for when the public learned the holdings.