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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
MOD icon
1
Modine Manufacturing
MOD
$12.8B
$85.6M 4.63%
602,462
+110,146
+22% +$14M
TTMI icon
2
TTM Technologies
TTMI
$13.6B
$68.5M 3.71%
1,188,822
+64,665
+6% +$3.01M
ELF icon
3
e.l.f. Beauty
ELF
$4.56B
$64.6M 3.49%
487,525
+20,687
+4% +$2.55M
DBRG icon
4
DigitalBridge
DBRG
$2.94B
$64M 3.46%
5,468,226
+2,386,066
+77% +$26.7M
CLS icon
5
Celestica
CLS
$35.1B
$62M 3.35%
251,556
-298,037
-54% -$60.1M
KTOS icon
6
Kratos Defense & Security Solutions
KTOS
$8.88B
$54.5M 2.95%
596,106
-732,317
-55% -$46.9M
SMTC icon
7
Semtech
SMTC
$11.7B
$47.8M 2.59%
668,862
+289,844
+76% +$15.7M
AVAV icon
8
AeroVironment
AVAV
$7.57B
$46.6M 2.52%
147,929
-30,887
-17% -$7.99M
POWL icon
9
Powell Industries
POWL
$8.46B
$45.2M 2.45%
444,735
-66,939
-13% -$5.68M
CLBT icon
10
Cellebrite
CLBT
$3.54B
$44.8M 2.43%
2,419,662
+1,407,818
+139% +$22.1M
GENI icon
11
Genius Sports
GENI
$1.73B
$44.7M 2.42%
3,612,811
-473,553
-12% -$5.66M
DOMO icon
12
Domo
DOMO
$166M
$42.5M 2.3%
2,684,753
+1,576,884
+142% +$24.4M
TLN
13
Talen Energy Corp
TLN
$17.2B
$40.3M 2.18%
94,717
+29,126
+44% +$10.5M
FLEX icon
14
Flex
FLEX
$43.4B
$34.5M 1.87%
595,786
+115,182
+24% +$6.12M
CSTL icon
15
Castle Biosciences
CSTL
$749M
$34.5M 1.87%
1,515,111
+25,539
+2% +$519K
GOOS
16
Canada Goose Holdings
GOOS
$868M
$30M 1.62%
2,174,001
+686,504
+46% +$8.9M
VPG icon
17
Vishay Precision Group
VPG
$1.39B
$26.4M 1.43%
823,298
-167,141
-17% -$4.84M
PRCH icon
18
Porch Group
PRCH
$1.3B
$25.7M 1.39%
1,534,303
-908,540
-37% -$13.9M
HNST icon
19
The Honest Company
HNST
$417M
$25.5M 1.38%
6,928,004
+710,651
+11% +$3.01M
IIIV icon
20
i3 Verticals
IIIV
$395M
$24.3M 1.31%
747,656
-213,959
-22% -$6.45M
REAX icon
21
Real Brokerage
REAX
$368M
$24.1M 1.3%
5,769,203
+3,783,281
+191% +$17.1M
TSEM icon
22
Tower Semiconductor
TSEM
$26.4B
$23.7M 1.28%
327,305
+217,673
+199% +$11.9M
OPRA
23
Opera Ltd
OPRA
$1.65B
$23.2M 1.26%
1,124,085
+247,645
+28% +$4.42M
QTRX icon
24
Quanterix
QTRX
$173M
$23.1M 1.25%
4,259,851
+626,229
+17% +$3.33M
LASR icon
25
nLIGHT
LASR
$3.95B
$22.8M 1.23%
+769,788
New +$19.1M
1
2 3 4 5

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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.