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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
+8.02%
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
$1.87B
AUM Growth
+$18.4M
Cap. Flow
-$10.9M
Cap. Flow %
-0.58%
Top 10 Hldgs %
26.36%
Holding
176
New
57
Increased
34
Reduced
55
Closed
21

Top Buys

Rank Stock Value
1
AKAM icon
Akamai
AKAM
+$43.1M
2
BIDU icon
Baidu
BIDU
+$32.2M
3
FAF icon
First American
FAF
+$20.1M
4
FOUR icon
Shift4
FOUR
+$19.7M
5
REAX icon
Real Brokerage
REAX
+$19.4M

Top Sells

Rank Stock Value
1
DBRG icon
DigitalBridge
DBRG
+$55.8M
2
ELF icon
e.l.f. Beauty
ELF
+$29.1M
3
KTOS icon
Kratos Defense & Security Solutions
KTOS
+$24.7M
4
CLS icon
Celestica
CLS
+$23.9M
5
POWL icon
Powell Industries
POWL
+$23.3M

Sector Composition

Rank Sector Weight
1 Technology 39.09%
2 Healthcare 17.39%
3 Consumer Discretionary 11.39%
4 Communication Services 7.96%
5 Financials 7.32%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PSNL icon
126
Personalis
PSNL
$1.51B
$3.02M 0.16%
+379,197
New +$3.32M
MSFT icon
127
Microsoft
MSFT
$3.71T
$2.89M 0.15%
5,972
– –
SMCI icon
128
Super Micro Computer
SMCI
$20.1B
$2.83M 0.15%
96,544
-199,797
-67% -$8.23M
INDI icon
129
indie Semiconductor
INDI
$854M
$2.37M 0.13%
+671,998
New +$2.95M
TGEN
130
Tecogen Inc
TGEN
$116M
$2.2M 0.12%
445,810
-149,996
-25% -$1.13M
GOOG icon
131
Alphabet (Google) Class C
GOOG
$4.32T
$2.19M 0.12%
6,992
– –
LITE icon
132
Lumentum
LITE
$69.3B
$2.15M 0.12%
5,822
-43,635
-88% -$11.2M
ARE icon
133
Alexandria Real Estate Equities
ARE
$8.56B
$2.13M 0.11%
+43,555
New +$2.56M
GTES icon
134
Gates Industrial Corporation Ltd.
GTES
$7.15B
$2.09M 0.11%
97,125
-269,820
-74% -$6.23M
XPEV icon
135
XPeng
XPEV
$11.6B
$1.97M 0.11%
+96,927
New +$2.1M
SD icon
136
SandRidge Energy
SD
$503M
$1.93M 0.1%
+134,000
New +$1.77M
ORCL icon
137
Oracle
ORCL
$423B
$1.86M 0.1%
9,560
– –
SN icon
138
SharkNinja
SN
$26.1B
$1.78M 0.1%
+15,907
New +$1.57M
CWST icon
139
Casella Waste Systems
CWST
$5.69B
$1.49M 0.08%
15,225
– –
VRT icon
140
Vertiv
VRT
$105B
$1.46M 0.08%
9,039
-91,560
-91% -$15.9M
PL icon
141
Planet Labs
PL
$8.53B
$1.36M 0.07%
68,715
-562,249
-89% -$8.06M
TALO icon
142
Talos Energy
TALO
$2.4B
$1.31M 0.07%
+119,100
New +$1.25M
SEI
143
Solaris Energy Infrastructure
SEI
$3.82B
$895K 0.05%
19,474
-343,966
-95% -$16.6M
RDDT icon
144
Reddit
RDDT
$31.1B
$818K 0.04%
3,558
-30,992
-90% -$6.52M
ECG
145
Everus Construction Group
ECG
$6.99B
$747K 0.04%
8,725
-64,205
-88% -$5.74M
LHX icon
146
L3Harris
LHX
$53.4B
$633K 0.03%
2,157
-2,894
-57% -$837K
SHLS icon
147
Shoals Technologies Group
SHLS
$1.5B
$619K 0.03%
72,781
-742,424
-91% -$6.67M
GDS icon
148
GDS Holdings
GDS
$6.41B
$536K 0.03%
15,359
+1,295
+9% +$44.8K
NWL icon
149
Newell Brands
NWL
$2.56B
$469K 0.03%
+126,100
New +$509K
AMPY icon
150
Amplify Energy
AMPY
$166M
$407K 0.02%
+89,063
New +$443K
4 5
6
7 8

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Portolan Capital Management's Q4 2025 Portfolio in Review

As of Q4 2025, Portolan Capital Management held 176 positions worth $1.87B, up 1% from $1.85B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

Portolan Capital Management's Q4 2025 filing shows 57 new, 34 increased, 55 reduced and 21 closed positions. Its largest new stake was Akamai: 524,321 shares worth $45.7M. The largest sale was DigitalBridge, an estimated $55.8M.

By sector, the portfolio is most concentrated in Technology at 39% of assets, up from 36% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Portolan Capital Management's largest Q4 2025 buy was Akamai: 524,321 shares worth $45.7M.
  • Portolan Capital Management added most to Baidu in Q4 2025, an estimated $32.2M increase.
  • Portolan Capital Management's biggest Q4 2025 reduction was DigitalBridge, cutting an estimated $55.8M.
  • Portolan Capital Management fully exited Wolverine World Wide in Q4 2025, selling an estimated $21.9M.
  • Portolan Capital Management's ten largest holdings make up 26% of its $1.87B portfolio in Q4 2025.
  • Portolan Capital Management opened 57 new positions and closed 21 in Q4 2025.
  • Portolan Capital Management's portfolio value rose 1% quarter-over-quarter to $1.87B.

Based on Portolan Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.