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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
CIEN icon
51
Ciena
CIEN
$58.4B
$12.9M 0.7%
+88,786
New +$9.04M
BAND
52
Bandwidth Inc
BAND
$1.61B
$12.4M 0.67%
745,802
+400,231
+116% +$6.17M
ALNT icon
53
Allient
ALNT
$1.92B
$11.5M 0.62%
+257,653
New +$11M
RPAY icon
54
Repay Holdings
RPAY
$327M
$11.4M 0.62%
+2,182,925
New +$11.7M
TTWO icon
55
Take-Two Interactive
TTWO
$46.1B
$11.3M 0.61%
43,611
-49
-0.1% -$11.6K
ENVA icon
56
Enova International
ENVA
$6.29B
$11.3M 0.61%
97,817
-114
-0.1% -$13K
SMWB icon
57
Similarweb
SMWB
$658M
$11M 0.59%
1,179,000
+451,408
+62% +$4.04M
FN icon
58
Fabrinet
FN
$20.1B
$10.5M 0.57%
28,770
+9,354
+48% +$3.08M
HZO icon
59
MarineMax
HZO
$788M
$9.95M 0.54%
392,713
+84,725
+28% +$2.16M
KRUS icon
60
Kura Sushi USA
KRUS
$593M
$9.95M 0.54%
167,408
-4,673
-3% -$373K
CELH icon
61
Celsius Holdings
CELH
$7.03B
$9.43M 0.51%
164,031
+91,173
+125% +$4.77M
GTES icon
62
Gates Industrial Corporation Ltd.
GTES
$7.15B
$9.11M 0.49%
366,945
-291,884
-44% -$7.25M
CXT icon
63
Crane NXT
CXT
$3.07B
$8.85M 0.48%
+131,989
New +$7.86M
META icon
64
Meta Platforms (Facebook)
META
$1.51T
$8.58M 0.46%
11,688
-27
-0.2% -$20.1K
PL icon
65
Planet Labs
PL
$8.53B
$8.19M 0.44%
+630,964
New +$4.87M
LITE icon
66
Lumentum
LITE
$69.3B
$8.05M 0.44%
+49,457
New +$6.17M
RDDT icon
67
Reddit
RDDT
$31.1B
$7.95M 0.43%
34,550
-19,967
-37% -$4.08M
BKSY icon
68
BlackSky Technology
BKSY
$1.19B
$7.85M 0.43%
+389,802
New +$7.6M
LPRO
69
DELISTED
Open Lending Corp
LPRO
$7.75M 0.42%
+3,673,890
New +$8.3M
TMDX icon
70
Transmedics
TMDX
$2.91B
$7.73M 0.42%
+68,910
New +$8.07M
UTHR icon
71
United Therapeutics
UTHR
$23.1B
$7.58M 0.41%
18,076
-12,687
-41% -$4.27M
GNRC icon
72
Generac Holdings
GNRC
$12.5B
$7.54M 0.41%
+45,031
New +$7.89M
LINC icon
73
Lincoln Educational Services
LINC
$1.3B
$7.52M 0.41%
319,878
-74,675
-19% -$1.6M
STC icon
74
Stewart Information Services
STC
$2.08B
$7.46M 0.4%
+101,782
New +$7M
UPWK icon
75
Upwork
UPWK
$1.19B
$7.32M 0.4%
+393,929
New +$5.87M
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.