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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
SRAD icon
101
Sportradar
SRAD
$3.85B
$3.55M 0.19%
131,810
-209,989
-61% -$6.23M
MRCY icon
102
Mercury Systems
MRCY
$6.52B
$3.47M 0.19%
+44,864
New +$2.79M
MSFT icon
103
Microsoft
MSFT
$3.71T
$3.09M 0.17%
5,972
-325
-5% -$166K
TPR icon
104
Tapestry
TPR
$32.8B
$2.93M 0.16%
25,868
-190,843
-88% -$20M
ORCL icon
105
Oracle
ORCL
$423B
$2.69M 0.15%
9,560
-4,123
-30% -$1.05M
SG icon
106
Sweetgreen
SG
$642M
$2.54M 0.14%
318,147
-198,262
-38% -$2.16M
NTRA icon
107
Natera
NTRA
$46.4B
$2.51M 0.14%
15,588
-4,971
-24% -$786K
PLSE icon
108
Pulse Biosciences
PLSE
$3.02B
$1.81M 0.1%
+102,197
New +$1.62M
PACK icon
109
Ranpak Holdings
PACK
$473M
$1.77M 0.1%
+315,456
New +$1.38M
GOOG icon
110
Alphabet (Google) Class C
GOOG
$4.32T
$1.7M 0.09%
6,992
– –
WLDN icon
111
Willdan Group
WLDN
$1.3B
$1.68M 0.09%
17,344
-151,202
-90% -$14.3M
LHX icon
112
L3Harris
LHX
$53.4B
$1.54M 0.08%
5,051
-44,465
-90% -$12.2M
CWST icon
113
Casella Waste Systems
CWST
$5.69B
$1.44M 0.08%
15,225
-78
-0.5% -$7.85K
WT icon
114
WisdomTree
WT
$3.22B
$984K 0.05%
70,782
-611,586
-90% -$8.17M
SPWH icon
115
Sportsman's Warehouse
SPWH
$46M
$842K 0.05%
303,800
-1,021,868
-77% -$3.26M
BIDU icon
116
Baidu
BIDU
$37.2B
$604K 0.03%
+4,580
New +$454K
GDS icon
117
GDS Holdings
GDS
$6.41B
$544K 0.03%
+14,064
New +$499K
BXC icon
118
BlueLinx
BXC
$706M
$490K 0.03%
6,700
-52,402
-89% -$4.13M
VELO
119
Velo3D Inc
VELO
$422M
$184K 0.01%
+59,921
New +$207K
ACI icon
120
Albertsons Companies
ACI
$5.83B
– –
-351,629
Closed -$7.56M
ALGN icon
121
Align Technology
ALGN
$12.3B
– –
-67,739
Closed -$12.8M
AVPT icon
122
AvePoint
AVPT
$2.71B
– –
-322,743
Closed -$6.23M
BOOT icon
123
Boot Barn
BOOT
$4.95B
– –
-74,942
Closed -$11.4M
BV icon
124
BrightView Holdings
BV
$1.07B
– –
-306,576
Closed -$5.1M
CRMD icon
125
CorMedix
CRMD
$584M
– –
-283,663
Closed -$3.49M
3 4
5
6 7

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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.