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Portolan Capital Management Portfolio holdings

AUM $1.88B
1-Year Est. Return 115.74%
This Fund
S&P 500
This Quarter Est. Return
+35.82%
1 Year Est. Return
+115.74%
3 Year Est. Return
+581.85%
5 Year Est. Return
+1,047.01%
10 Year Est. Return
+13,266.68%
AUM
$1.59B
AUM Growth
+$279M
Cap. Flow
-$16.5M
Cap. Flow %
-1.03%
Top 10 Hldgs %
31.62%
Holding
147
New
38
Increased
47
Reduced
31
Closed
29

Top Buys

Rank Stock Value
1
AVAV icon
AeroVironment
AVAV
+$30.3M
2
POWL icon
Powell Industries
POWL
+$21.2M
3
CLS icon
Celestica
CLS
+$16.7M
4
GOOS
Canada Goose Holdings
GOOS
+$14.4M
5
METC icon
Ramaco Resources Class A
METC
+$13.6M

Top Sells

Rank Stock Value
1
LNTH icon
Lantheus
LNTH
+$53.8M
2
EBAY icon
eBay
EBAY
+$32.1M
3
SLM icon
SLM Corp
SLM
+$24.5M
4
TREE icon
LendingTree
TREE
+$22.1M
5
GTES icon
Gates Industrial Corporation Ltd.
GTES
+$21.6M

Sector Composition

Rank Sector Weight
1 Technology 26.68%
2 Industrials 15.71%
3 Consumer Discretionary 14.72%
4 Healthcare 13.98%
5 Financials 9.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CRMD icon
101
CorMedix
CRMD
$584M
$3.49M 0.22%
+283,663
New +$3.13M
FORR icon
102
Forrester Research
FORR
$224M
$3.48M 0.22%
351,726
+71,612
+26% +$712K
NTRA icon
103
Natera
NTRA
$46.4B
$3.47M 0.22%
20,559
– –
CELH icon
104
Celsius Holdings
CELH
$7.03B
$3.38M 0.21%
72,858
-69,691
-49% -$2.68M
MRX
105
Marex Group Limited Ordinary Shares
MRX
$4.37B
$3.31M 0.21%
83,759
-90,437
-52% -$3.76M
TGEN
106
Tecogen Inc
TGEN
$116M
$3.17M 0.2%
+465,571
New +$2.42M
MSFT icon
107
Microsoft
MSFT
$3.71T
$3.13M 0.2%
6,297
+500
+9% +$217K
ORCL icon
108
Oracle
ORCL
$423B
$2.99M 0.19%
13,683
+3,839
+39% +$620K
DXCM icon
109
DexCom
DXCM
$32B
$2.72M 0.17%
+31,169
New +$2.44M
DDI
110
DoubleDown Interactive
DDI
$588M
$2.64M 0.17%
+275,903
New +$2.71M
OLPX
111
DELISTED
Olaplex Holdings
OLPX
$2.19M 0.14%
+1,562,741
New +$2.04M
INVE icon
112
Identive
INVE
$61.9M
$1.94M 0.12%
594,006
-450,646
-43% -$1.45M
CWST icon
113
Casella Waste Systems
CWST
$5.69B
$1.77M 0.11%
15,303
– –
GOOG icon
114
Alphabet (Google) Class C
GOOG
$4.32T
$1.24M 0.08%
6,992
+625
+10% +$103K
PRTC
115
DELISTED
PureTech Health
PRTC
$479K 0.03%
27,795
+15,910
+134% +$280K
STLN
116
Starling Oncology, Inc. Common Stock
STLN
$641M
$454K 0.03%
+221,512
New +$554K
CWH icon
117
Camping World
CWH
$653M
$362K 0.02%
+21,050
New +$328K
NOG icon
118
Northern Oil and Gas
NOG
$2.35B
$306K 0.02%
10,777
-321,178
-97% -$8.64M
BIDU icon
119
Baidu
BIDU
$37.2B
– –
-134,546
Closed -$12.4M
CTOS icon
120
Custom Truck One Source
CTOS
$2.37B
– –
-1,397,327
Closed -$5.9M
DY icon
121
Dycom Industries
DY
$12.3B
– –
-81,002
Closed -$12.3M
EBAY icon
122
eBay
EBAY
$49.8B
– –
-474,658
Closed -$32.1M
ECPG icon
123
Encore Capital Group
ECPG
$2.13B
– –
-140,726
Closed -$4.82M
EVER icon
124
EverQuote
EVER
$906M
– –
-100,552
Closed -$2.63M
GCO icon
125
Genesco
GCO
$422M
– –
-88,732
Closed -$1.88M
2 3 4
5
6

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Portolan Capital Management's Q2 2025 Portfolio in Review

As of Q2 2025, Portolan Capital Management held 147 positions worth $1.59B, up 21% from $1.32B the previous quarter. Its ten largest holdings account for 32% of the portfolio.

Portolan Capital Management's Q2 2025 filing shows 38 new, 47 increased, 31 reduced and 29 closed positions. Its largest new stake was AeroVironment: 178,816 shares worth $51M. The largest sale was Lantheus, an estimated $53.8M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 19% a quarter earlier, followed by Industrials and Consumer Discretionary.

  • Portolan Capital Management's largest Q2 2025 buy was AeroVironment: 178,816 shares worth $51M.
  • Portolan Capital Management added most to Powell Industries in Q2 2025, an estimated $21.2M increase.
  • Portolan Capital Management's biggest Q2 2025 reduction was Lantheus, cutting an estimated $53.8M.
  • Portolan Capital Management fully exited eBay in Q2 2025, selling an estimated $32.1M.
  • Portolan Capital Management's ten largest holdings make up 32% of its $1.59B portfolio in Q2 2025.
  • Portolan Capital Management opened 38 new positions and closed 29 in Q2 2025.
  • Portolan Capital Management's portfolio value rose 21% quarter-over-quarter to $1.59B.

Based on Portolan Capital Management's 13F filing for Q2 2025, filed 13 Aug 2025.