2026 Q1 Portfolio Activity
In 2026 Q1, GAGNON SECURITIES LLC maintained a portfolio of 92 distinct positions. The most significant new addition was ISHARES TR, now representing 2.15% of the total fund value. They heavily accumulated shares in ASPEN AEROGELS INC, increasing the position by 64.3%. Conversely, GAGNON SECURITIES LLC completely exited their position in AIR LEASE CORP.
Position History
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Total Positions
92
Quarter
2026 Q1
Top Holding
ENSG (8.4%)
Top 10 Concentration
47.1%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 92
GAGNON SECURITIES LLC Full Holdings List — 2026 Q1
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
ENSG
ENSIGN GROUP IN...
|
Healthcare | 8.36% | 6.40% |
#1
3
Prev: #4
|
5.8 | -878 | -0.5% |
P
S
|
179,671 | $36,203,707 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CDNA
CAREDX INC
|
Healthcare | 7.06% | 6.81% |
#2
1
Prev: #1
|
4.8 | -13,016 | -0.7% |
P
S
|
1,761,874 | $30,586,140 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
AMRC
AMERESCO INC
|
Industrials | 4.94% | 4.97% |
#3
2
Prev: #5
|
3.5 | 7,179 | 0.9% |
P
S
|
840,063 | $21,421,607 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
WGS
GENEDX HOLDINGS...
|
Healthcare | 4.49% | 6.71% |
#4
2
Prev: #2
|
4.3 | 49,615 | 19.6% |
P
S
|
303,149 | $19,468,229 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
EPD
ENTERPRISE PROD...
|
Energy | 4.49% | 3.44% |
#5
3
Prev: #8
|
2.8 | -13,344 | -2.5% |
P
S
|
514,257 | $19,459,485 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
NVGS
NAVIGATOR HLDGS...
|
Energy | 3.96% | 3.04% |
#6
6
Prev: #12
|
2.1 | 24,777 | 2.9% |
P
S
|
886,631 | $17,138,577 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
EQIX
EQUINIX INC
|
Real Estate | 3.84% | 2.67% |
#7
6
Prev: #13
|
2.0 | -191 | -1.1% |
P
S
|
16,951 | $16,616,048 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
GNRC
GENERAC HLDGS I...
|
Industrials | 3.38% | 2.10% |
#8
12
Prev: #20
|
1.9 | -680 | -0.9% |
P
S
|
74,913 | $14,632,756 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
ISRG
INTUITIVE SURGI...
|
Healthcare | 3.36% | 3.67% |
#9
3
Prev: #6
|
1.8 | -178 | -0.6% |
P
S
|
31,619 | $14,576,048 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PCRX
PACIRA BIOSCIEN...
|
Healthcare | 3.22% | 2.64% |
#10
4
Prev: #14
|
3.8 | 116,299 | 23.2% |
P
S
|
617,510 | $13,955,726 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
FRSH
FRESHWORKS INC
|
Technology | 3.21% | 3.07% |
#11
Prev: #11
|
3.8 | 501,356 | 40.8% |
P
S
|
1,731,367 | $13,902,877 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
KMX
CARMAX INC
|
Consumer Cyclical | 2.97% | 2.52% |
#12
5
Prev: #17
|
1.7 | -10,378 | -3.2% |
P
S
|
309,699 | $12,877,284 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PROF
PROFOUND MED CO...
|
Healthcare | 2.91% | 3.12% |
#13
3
Prev: #10
|
1.7 | 263 | 0.0% |
P
S
|
1,944,324 | $12,599,219 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CAKE
CHEESECAKE FACT...
|
Consumer Cyclical | 2.84% | 2.33% |
#14
4
Prev: #18
|
1.6 | -1,546 | -0.7% |
P
S
|
225,048 | $12,321,378 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
BL
BLACKLINE INC
|
Technology | 2.53% | 3.15% |
#15
6
Prev: #9
|
3.0 | 17,026 | 6.1% |
P
S
|
296,424 | $10,967,688 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
BLFS
BIOLIFE SOLUTIO...
|
Healthcare | 2.36% | 2.63% |
#16
1
Prev: #15
|
1.4 | 2,155 | 0.4% |
P
S
|
536,512 | $10,236,649 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
FIVN
FIVE9 INC
|
Technology | 2.18% | 2.55% |
#17
1
Prev: #16
|
1.4 | -3,662 | -0.6% |
P
S
|
622,064 | $9,436,711 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
SGOV
ISHARES TR
|
Bond/Debt | 2.15% | — |
#18
Prev: #—
|
4.4 | 92,702 | — |
NEW
|
92,702 | $9,331,383 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CARG
CARGURUS INC
|
Consumer Cyclical | 2.13% | 2.11% |
#19
Prev: #19
|
1.4 | 702 | 0.3% |
P
S
|
271,524 | $9,245,392 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
AMPL
AMPLITUDE INC
|
Technology | 1.67% | 1.65% |
#20
1
Prev: #21
|
3.7 | 360,966 | 51.6% |
P
S
|
1,059,836 | $7,228,082 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
TMCI
TREACE MED CONC...
|
Healthcare | 1.61% | 1.55% |
#21
2
Prev: #23
|
3.6 | 2,091,311 | 67.2% |
P
S
|
5,201,886 | $6,970,527 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
QDEL
QUIDELORTHO COR...
|
Healthcare | 1.53% | 0.93% |
#22
9
Prev: #31
|
3.6 | 244,148 | 153.4% |
P
S
|
403,325 | $6,626,630 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
ASPN
ASPEN AEROGELS ...
|
Industrials | 1.47% | 0.65% |
#23
15
Prev: #38
|
3.6 | 728,603 | 64.3% |
P
S
|
1,861,851 | $6,367,530 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PRLB
PROTO LABS INC
|
Industrials | 1.46% | 1.15% |
#24
2
Prev: #26
|
1.1 | -659 | -0.6% |
P
S
|
110,889 | $6,322,891 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CELC
CELCUITY INC
|
Healthcare | 1.41% | 1.08% |
#25
3
Prev: #28
|
1.1 | -59 | -0.1% |
P
S
|
53,342 | $6,088,456 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
HZO
MarineMax Inc
|
Consumer Cyclical | 1.38% | 1.59% |
#26
4
Prev: #22
|
0.6 | -101,443 | -31.5% |
P
S
|
220,610 | $5,969,707 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
VERX
VERICEL CORP
|
Technology | 1.29% | 1.48% |
#27
3
Prev: #24
|
3.0 | 103,577 | 28.4% |
P
S
|
468,220 | $5,567,136 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
OSUR
OraSure Technol...
|
Healthcare | 1.19% | 0.77% |
#28
9
Prev: #37
|
2.5 | 144,609 | 9.2% |
P
S
|
1,714,391 | $5,143,173 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CMG
CHIPOTLE MEXICA...
|
Consumer Cyclical | 1.17% | 1.18% |
#29
4
Prev: #25
|
1.0 | 874 | 0.6% |
P
S
|
157,849 | $5,052,746 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
SPGYF
WHITECAP RES IN...
|
Unknown | 1.13% | 0.83% |
#30
4
Prev: #34
|
1.0 | -50,704 | -10.4% |
P
S
|
435,418 | $4,898,472 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CTRE
CARETRUST REIT ...
|
Real Estate | 1.13% | 0.98% |
#31
2
Prev: #29
|
1.0 | -25 | -0.0% |
P
S
|
133,046 | $4,876,136 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
HNGE
HINGE HEALTH IN...
|
Healthcare | 1.11% | — |
#32
Prev: #—
|
3.9 | 124,250 | — |
NEW
|
124,250 | $4,791,080 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
DV
DOUBLEVERIFY HL...
|
Communication Services | 1.07% | 1.15% |
#33
6
Prev: #27
|
0.9 | -3,202 | -0.7% |
P
S
|
488,462 | $4,640,389 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PNTG
PENNANT GROUP I...
|
Healthcare | 0.97% | 0.79% |
#34
1
Prev: #35
|
0.9 | -42 | -0.0% |
P
S
|
137,484 | $4,190,512 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
KLTR
KALTURA INC
|
Technology | 0.92% | 0.96% |
#35
5
Prev: #30
|
2.4 | 417,571 | 14.6% |
P
S
|
3,278,936 | $4,000,302 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
ICUI
ICU MED INC
|
Healthcare | 0.89% | 0.84% |
#36
3
Prev: #33
|
0.9 | 670 | 2.3% |
P
S
|
29,743 | $3,841,308 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
AOSL
ALPHA & OMEGA S...
|
Technology | 0.86% | 0.87% |
#37
5
Prev: #32
|
0.3 | -47,768 | -22.2% |
P
S
|
167,874 | $3,720,088 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PTEN
PATTERSON-UTI E...
|
Energy | 0.79% | 0.44% |
#38
2
Prev: #40
|
0.8 | -38,131 | -10.8% |
P
S
|
314,646 | $3,407,616 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
MCHP
MICROCHIP TECHN...
|
Technology | 0.40% | 0.35% |
#39
4
Prev: #43
|
0.7 | -324 | -1.2% |
P
S
|
26,838 | $1,734,015 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
SAM
BOSTON BEER INC
|
Consumer Defensive | 0.39% | 0.25% |
#40
6
Prev: #46
|
2.2 | 884 | 13.9% |
P
S
|
7,239 | $1,667,866 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
GNL
GLOBAL NET LEAS...
|
Real Estate | 0.37% | 0.30% |
#41
3
Prev: #44
|
0.6 | -385 | -0.2% |
P
S
|
170,125 | $1,592,370 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
GNTX
GENTEX CORP
|
Consumer Cyclical | 0.29% | 0.26% |
#42
3
Prev: #45
|
0.6 | 1,261 | 2.3% |
P
S
|
56,933 | $1,243,995 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
PFE
PFIZER INC
|
Healthcare | 0.29% | 0.22% |
#43
6
Prev: #49
|
0.6 | -93 | -0.2% |
P
S
|
44,260 | $1,242,821 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
CNF
CNFINANCE HLDGS...
|
Financial Services | 0.28% | 0.39% |
#44
3
Prev: #41
|
0.6 | -2,915 | -0.9% |
P
S
|
313,938 | $1,227,498 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
NCNO
NCINO INC
|
Technology | 0.27% | 0.38% |
#45
3
Prev: #42
|
2.1 | 6,026 | 8.2% |
P
S
|
79,520 | $1,191,210 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
DOCU
DOCUSIGN INC
|
Technology | 0.23% | — |
#46
Prev: #—
|
3.6 | 21,232 | — |
NEW
|
21,232 | $1,006,609 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
NTDOY
NINTENDO LTD
|
Communication Services | 0.23% | 0.24% |
#47
Prev: #47
|
0.6 | -626 | -0.9% |
P
S
|
69,697 | $995,970 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
FLG
FLAGSTAR BANK N...
|
Financial Services | 0.23% | 0.19% |
#48
2
Prev: #50
|
0.6 | -156 | -0.2% |
P
S
|
74,711 | $983,944 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
DVN
DEVON ENERGY CO...
|
Energy | 0.22% | 0.14% |
#49
5
Prev: #54
|
0.6 | -45 | -0.2% |
P
S
|
19,066 | $959,401 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 | |||
|
SLG
SL GREEN RLTY C...
|
Real Estate | 0.22% | 0.24% |
#50
2
Prev: #48
|
0.6 | 24 | 0.1% |
P
S
|
25,862 | $955,342 | 2000 Q4 | 13F Filing | 2026-03-31 | 2026-04-22 |
Showing 1-50 of 92 holdings