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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
+28.36%
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
$1.85B
AUM Growth
+$253M
Cap. Flow
-$62.9M
Cap. Flow %
-3.41%
Top 10 Hldgs %
31.58%
Holding
159
New
41
Increased
35
Reduced
42
Closed
40

Top Buys

Rank Stock Value
1
DBRG icon
DigitalBridge
DBRG
+$26.7M
2
DOMO icon
Domo
DOMO
+$24.4M
3
CLBT icon
Cellebrite
CLBT
+$22.1M
4
WWW icon
Wolverine World Wide
WWW
+$21M
5
LASR icon
nLIGHT
LASR
+$19.1M

Top Sells

Rank Stock Value
1
CLS icon
Celestica
CLS
+$60.1M
2
KTOS icon
Kratos Defense & Security Solutions
KTOS
+$46.9M
3
SLM icon
SLM Corp
SLM
+$23.3M
4
FOUR icon
Shift4
FOUR
+$22.9M
5
PBPB
Potbelly
PBPB
+$20.4M

Sector Composition

Rank Sector Weight
1 Technology 36.26%
2 Industrials 16.27%
3 Consumer Discretionary 11.86%
4 Healthcare 9.33%
5 Financials 7.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TGLS icon
76
Tecnoglass Holdings Inc.
TGLS
$1.96B
$7.31M 0.4%
109,265
-40,551
-27% -$2.99M
NUS icon
77
Nu Skin
NUS
$267M
$7.27M 0.39%
+596,724
New +$6.27M
CADL icon
78
Candel Therapeutics
CADL
$776M
$7.06M 0.38%
1,384,142
-237,586
-15% -$1.37M
FEIM icon
79
Frequency Electronics
FEIM
$816M
$6.91M 0.37%
+203,827
New +$5.66M
DOUG icon
80
Douglas Elliman
DOUG
$162M
$6.73M 0.36%
2,353,950
+521,959
+28% +$1.37M
ESTA icon
81
Establishment Labs
ESTA
$2.28B
$6.36M 0.34%
155,096
+30,704
+25% +$1.25M
TIC
82
TIC Solutions Inc
TIC
$2.2B
$6.3M 0.34%
+472,954
New +$5.39M
GCT icon
83
GigaCloud Technology
GCT
$1.9B
$6.26M 0.34%
220,387
-10,516
-5% -$274K
ECG
84
Everus Construction Group
ECG
$6.99B
$6.25M 0.34%
+72,930
New +$5.42M
LMT icon
85
Lockheed Martin
LMT
$136B
$6.24M 0.34%
12,506
-3,475
-22% -$1.58M
SHLS icon
86
Shoals Technologies Group
SHLS
$1.5B
$6.04M 0.33%
+815,205
New +$5.02M
AMRC icon
87
Ameresco
AMRC
$1.36B
$5.87M 0.32%
+174,903
New +$4M
VNET
88
VNET Group
VNET
$2.09B
$5.86M 0.32%
+567,466
New +$4.78M
ONTO icon
89
Onto Innovation
ONTO
$15.3B
$5.76M 0.31%
+44,564
New +$4.77M
FORR icon
90
Forrester Research
FORR
$224M
$5.45M 0.29%
513,872
+162,146
+46% +$1.64M
TGEN
91
Tecogen Inc
TGEN
$116M
$5.25M 0.28%
595,806
+130,235
+28% +$1.04M
LEVI icon
92
Levi Strauss
LEVI
$9.39B
$4.99M 0.27%
+214,221
New +$4.55M
PKE icon
93
Park Aerospace
PKE
$819M
$4.98M 0.27%
+245,035
New +$4.44M
PRG icon
94
PROG Holdings
PRG
$1.71B
$4.86M 0.26%
+150,161
New +$4.92M
OLPX
95
DELISTED
Olaplex Holdings
OLPX
$4.76M 0.26%
3,635,124
+2,072,383
+133% +$2.97M
WGS icon
96
GeneDx Holdings
WGS
$2.3B
$4.75M 0.26%
44,048
-118,180
-73% -$12.9M
SITM icon
97
SiTime
SITM
$21.8B
$4.67M 0.25%
+15,503
New +$3.59M
WYFI
98
WhiteFiber Inc
WYFI
$951M
$4.37M 0.24%
+160,669
New +$3.14M
CTOS icon
99
Custom Truck One Source
CTOS
$2.37B
$4.17M 0.23%
+649,076
New +$3.76M
RCKY icon
100
Rocky Brands
RCKY
$369M
$3.82M 0.21%
128,307
-80,879
-39% -$2.17M
2 3
4
5 6

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Portolan Capital Management's Q3 2025 Portfolio in Review

As of Q3 2025, Portolan Capital Management held 159 positions worth $1.85B, up 16% from $1.59B the previous quarter. Its ten largest holdings account for 32% of the portfolio.

Portolan Capital Management withdrew a net $62.9M in Q3 2025, closing 40 positions and reducing 42 holdings. Its most notable exit was SLM Corp, an estimated $23.3M position sold in full.

By sector, the portfolio is most concentrated in Technology at 36% of assets, up from 27% a quarter earlier, followed by Industrials and Consumer Discretionary.

Against the trend, Portolan Capital Management opened a new position in Wolverine World Wide worth $21.9M.

  • Portolan Capital Management's largest Q3 2025 buy was Wolverine World Wide: 796,627 shares worth $21.9M.
  • Portolan Capital Management added most to DigitalBridge in Q3 2025, an estimated $26.7M increase.
  • Portolan Capital Management's biggest Q3 2025 reduction was Celestica, cutting an estimated $60.1M.
  • Portolan Capital Management fully exited SLM Corp in Q3 2025, selling an estimated $23.3M.
  • Portolan Capital Management's ten largest holdings make up 32% of its $1.85B portfolio in Q3 2025.
  • Portolan Capital Management opened 41 new positions and closed 40 in Q3 2025.
  • Portolan Capital Management's portfolio value rose 16% quarter-over-quarter to $1.85B.

Based on Portolan Capital Management's 13F filing for Q3 2025, filed 13 Nov 2025.