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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
ECO
101
Okeanis Eco Tankers
ECO
$2.42B
$5.48M 0.29%
+161,815
New +$5.49M
PLSE icon
102
Pulse Biosciences
PLSE
$3.02B
$5.4M 0.29%
393,499
+291,302
+285% +$4.54M
GCT icon
103
GigaCloud Technology
GCT
$1.9B
$5.4M 0.29%
137,478
-82,909
-38% -$2.74M
VICR icon
104
Vicor
VICR
$10.2B
$5.34M 0.29%
+48,721
New +$4.14M
PKE icon
105
Park Aerospace
PKE
$819M
$5.23M 0.28%
245,035
– –
GDOT icon
106
Green Dot
GDOT
$745M
$5.21M 0.28%
406,734
-1,208,546
-75% -$15M
BAND
107
Bandwidth Inc
BAND
$1.61B
$5.2M 0.28%
336,874
-408,928
-55% -$6.2M
EBAY icon
108
eBay
EBAY
$49.8B
$5.06M 0.27%
+58,144
New +$5.03M
FN icon
109
Fabrinet
FN
$20.1B
$4.95M 0.27%
10,878
-17,892
-62% -$7.78M
IESC icon
110
IES Holdings
IESC
$15.2B
$4.59M 0.25%
+11,792
New +$4.74M
FLGT icon
111
Fulgent Genetics
FLGT
$527M
$4.46M 0.24%
+169,590
New +$4.4M
ADEA icon
112
Adeia
ADEA
$3.11B
$4.42M 0.24%
+256,208
New +$3.8M
OLPX
113
DELISTED
Olaplex Holdings
OLPX
$4.13M 0.22%
3,082,600
-552,524
-15% -$657K
QGEN icon
114
Qiagen
QGEN
$8.72B
$4.06M 0.22%
+90,182
New +$4.17M
AMBA icon
115
Ambarella
AMBA
$3.81B
$3.84M 0.21%
+54,242
New +$4.38M
SMWB icon
116
Similarweb
SMWB
$658M
$3.69M 0.2%
492,861
-686,139
-58% -$5.53M
NTRA icon
117
Natera
NTRA
$46.4B
$3.57M 0.19%
15,588
– –
MBLY icon
118
Mobileye
MBLY
$2.2B
$3.57M 0.19%
+341,936
New +$4.27M
SPT icon
119
Sprout Social
SPT
$621M
$3.4M 0.18%
+301,473
New +$3.26M
MRCY icon
120
Mercury Systems
MRCY
$6.52B
$3.38M 0.18%
46,348
+1,484
+3% +$110K
TPR icon
121
Tapestry
TPR
$32.8B
$3.31M 0.18%
25,868
– –
OSK icon
122
Oshkosh
OSK
$9.59B
$3.26M 0.17%
+25,940
New +$3.34M
RRX icon
123
Regal Rexnord
RRX
$11.9B
$3.24M 0.17%
+23,098
New +$3.29M
OUST icon
124
Ouster
OUST
$2.92B
$3.14M 0.17%
+145,148
New +$3.83M
QMCO icon
125
Quantum Corp
QMCO
$474M
$3.08M 0.16%
+477,214
New +$4.28M
3 4
5
6 7

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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.