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Gagnon Securities Portfolio holdings

AUM $519M
1-Year Est. Return 44.91%
This Fund
S&P 500
This Quarter Est. Return
+7.62%
1 Year Est. Return
+44.91%
3 Year Est. Return
+129.38%
5 Year Est. Return
+108.07%
10 Year Est. Return
+1,389.15%
AUM
$491M
AUM Growth
-$7.42M
Cap. Flow
-$15.8M
Cap. Flow %
-3.21%
Top 10 Hldgs %
48.23%
Holding
88
New
2
Increased
33
Reduced
40
Closed
2

Top Buys

Rank Stock Value
1
FIVN icon
FIVE9
FIVN
+$6.93M
2
KMX icon
CarMax
KMX
+$3.78M
3
TMCI icon
Treace Medical Concepts
TMCI
+$3.7M
4
AMPL icon
Amplitude
AMPL
+$1.98M
5
HZO icon
MarineMax
HZO
+$1.5M

Top Sells

Rank Stock Value
1
FRSH icon
Freshworks
FRSH
+$7.51M
2
AL
Air Lease Corp
AL
+$6.94M
3
PSIX
Power Solutions International
PSIX
+$6.36M
4
ISRG icon
Intuitive Surgical
ISRG
+$6.16M
5
ASPN icon
Aspen Aerogels
ASPN
+$3.21M

Sector Composition

Rank Sector Weight
1 Healthcare 42.13%
2 Technology 16.31%
3 Industrials 15.37%
4 Consumer Discretionary 10.93%
5 Energy 7.24%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MSFT icon
76
Microsoft
MSFT
$3.62T
$246K 0.05%
508
+2
+0.4% +$1K
RNG icon
77
RingCentral
RNG
$5.16B
$235K 0.05%
8,149
+27
+0.3% +$769
BX icon
78
Blackstone
BX
$109B
$227K 0.05%
+1,475
New +$224K
AKAM icon
79
Akamai
AKAM
$17.9B
$220K 0.04%
+2,520
New +$207K
PETS icon
80
PetMed Express
PETS
$42.1M
$135K 0.03%
42,328
+18,487
+78% +$46.4K
SVV icon
81
Savers
SVV
$1.65B
$129K 0.03%
13,764
– –
GDRX icon
82
GoodRx Holdings
GDRX
$1.11B
$120K 0.02%
44,118
+55
+0.1% +$181
RDHL
83
Redhill Biopharma
RDHL
$4.07M
$88.7K 0.02%
86,102
+68,280
+383% +$91.8K
BLZE icon
84
Backblaze
BLZE
$1.15B
– –
-55,393
Closed -$514K
PSIX
85
Power Solutions International
PSIX
$804M
– –
-64,770
Closed -$6.36M
1 2 3
4

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Gagnon Securities's Q4 2025 Portfolio in Review

As of Q4 2025, Gagnon Securities held 88 positions worth $491M, down 1.5% from $499M the previous quarter. Its ten largest holdings account for 48% of the portfolio.

Gagnon Securities withdrew a net $15.8M in Q4 2025, closing 2 positions and reducing 40 holdings. Its most notable exit was Power Solutions International, an estimated $6.36M position sold in full.

By sector, the portfolio is most concentrated in Healthcare at 42% of assets, up from 37% a quarter earlier, followed by Technology and Industrials.

Against the trend, Gagnon Securities opened a new position in Blackstone worth $227K.

  • Gagnon Securities's largest Q4 2025 buy was Blackstone: 1,475 shares worth $227K.
  • Gagnon Securities added most to FIVE9 in Q4 2025, an estimated $6.93M increase.
  • Gagnon Securities's biggest Q4 2025 reduction was Freshworks, cutting an estimated $7.51M.
  • Gagnon Securities fully exited Power Solutions International in Q4 2025, selling an estimated $6.36M.
  • Gagnon Securities's ten largest holdings make up 48% of its $491M portfolio in Q4 2025.
  • Gagnon Securities opened 2 new positions and closed 2 in Q4 2025.
  • Gagnon Securities's portfolio value fell 1.5% quarter-over-quarter to $491M.

Based on Gagnon Securities's 13F filing for Q4 2025, filed 13 Feb 2026.