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Portolan Capital Management Portfolio holdings

AUM $2.67B
1-Year Est. Return 169.09%
This Fund
S&P 500
This Quarter Est. Return
+69.41%
1 Year Est. Return
+169.09%
3 Year Est. Return
+737.83%
5 Year Est. Return
+1,497.12%
10 Year Est. Return
+21,256.61%
AUM
$2.67B
AUM Growth
+$792M
Cap. Flow
+$21.4M
Cap. Flow %
0.8%
Top 10 Hldgs %
29.02%
Holding
180
New
36
Increased
49
Reduced
59
Closed
32

Top Buys

Rank Stock Value
1
VIRT icon
Virtu Financial
VIRT
+$48.9M
2
FOUR icon
Shift4
FOUR
+$38.9M
3
QLYS icon
Qualys
QLYS
+$28.6M
4
SRAD icon
Sportradar
SRAD
+$26.5M
5
PENG
Penguin Solutions Inc
PENG
+$24.8M

Top Sells

Rank Stock Value
1
PBF icon
PBF Energy
PBF
+$38.1M
2
TTMI icon
TTM Technologies
TTMI
+$35.4M
3
CRGY icon
Crescent Energy
CRGY
+$35.1M
4
BIDU icon
Baidu
BIDU
+$33.5M
5
FN icon
Fabrinet
FN
+$31.2M

Sector Composition

Rank Sector Weight
1 Technology 44.68%
2 Consumer Discretionary 12.13%
3 Industrials 12.05%
4 Healthcare 11.19%
5 Financials 9.77%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MEI icon
126
Methode Electronics
MEI
$559M
$3.79M 0.14%
+200,000
New +$2.07M
FN icon
127
Fabrinet
FN
$14.6B
$3.61M 0.14%
6,418
-48,345
-88% -$31.2M
UCTT
128
Ultra Clean Holdings
UCTT
$3.28B
$3.54M 0.13%
24,831
-8,869
-26% -$781K
KTOS icon
129
Kratos Defense & Security Solutions
KTOS
$8.98B
$3.25M 0.12%
65,221
-194,590
-75% -$11.8M
NXT icon
130
Nextpower Inc. Common Stock
NXT
$12.8B
$3.23M 0.12%
27,101
-29,646
-52% -$3.66M
HAFN icon
131
Hafnia
HAFN
$4.61B
$2.44M 0.09%
367,195
-1,581,522
-81% -$12.8M
NTRA icon
132
Natera
NTRA
$47.3B
$2.32M 0.09%
8,532
-2,886
-25% -$615K
GH icon
133
Guardant Health
GH
$21.7B
$2.08M 0.08%
13,897
-258
-2% -$28.1K
GCT icon
134
GigaCloud Technology
GCT
$1.85B
$2.07M 0.08%
65,644
+13,630
+26% +$537K
GOOG icon
135
Alphabet (Google) Class C
GOOG
$4.1T
$2.02M 0.08%
5,710
– –
AAOI icon
136
Applied Optoelectronics
AAOI
$8.96B
$1.77M 0.07%
11,966
-17,867
-60% -$2.9M
IESC icon
137
IES Holdings
IESC
$12.9B
$1.43M 0.05%
3,880
-19,858
-84% -$6.41M
CWST icon
138
Casella Waste Systems
CWST
$5.95B
$1.42M 0.05%
14,690
-410
-3% -$35K
PL icon
139
Planet Labs
PL
$6.59B
$1.22M 0.05%
36,869
-10,419
-22% -$385K
AMSC icon
140
American Superconductor
AMSC
$1.43B
$1.22M 0.05%
29,314
-266,322
-90% -$12M
DAN icon
141
Dana Inc
DAN
$3.45B
$901K 0.03%
33,121
-1,116
-3% -$38.1K
DBRG icon
142
DigitalBridge
DBRG
$2.99B
$896K 0.03%
56,763
-316,367
-85% -$4.95M
LINC icon
143
Lincoln Educational Services
LINC
$813M
$699K 0.03%
14,007
– –
LHX icon
144
L3Harris
LHX
$47.8B
$627K 0.02%
2,157
– –
LPRO
145
DELISTED
Open Lending Corp
LPRO
$569K 0.02%
182,803
-6,720,085
-97% -$13.7M
TLX
146
Telix Pharmaceuticals
TLX
$4.06B
$293K 0.01%
25,424
-515,843
-95% -$5.25M
GDS icon
147
GDS Holdings
GDS
$6.28B
$274K 0.01%
9,120
-6,161
-40% -$238K
TALO icon
148
Talos Energy
TALO
$2.81B
$172K 0.01%
13,300
-331,249
-96% -$4.94M
ACLS icon
149
Axcelis
ACLS
$3.55B
– –
-77,168
Closed -$7.18M
AMPL icon
150
Amplitude
AMPL
$1.63B
– –
-359,593
Closed -$2.45M
4 5
6
7 8

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Portolan Capital Management's Q2 2026 Portfolio in Review

As of Q2 2026, Portolan Capital Management held 180 positions worth $2.67B, up 42% from $1.88B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Portolan Capital Management's Q2 2026 filing shows 36 new, 49 increased, 59 reduced and 32 closed positions. Its largest new stake was Sportradar: 1,819,949 shares worth $27.2M. The largest sale was PBF Energy, an estimated $38.1M.

By sector, the portfolio is most concentrated in Technology at 45% of assets, up from 34% a quarter earlier, followed by Consumer Discretionary and Industrials.

  • Portolan Capital Management's largest Q2 2026 buy was Sportradar: 1,819,949 shares worth $27.2M.
  • Portolan Capital Management added most to Virtu Financial in Q2 2026, an estimated $48.9M increase.
  • Portolan Capital Management's biggest Q2 2026 reduction was TTM Technologies, cutting an estimated $35.4M.
  • Portolan Capital Management fully exited PBF Energy in Q2 2026, selling an estimated $38.1M.
  • Portolan Capital Management's ten largest holdings make up 29% of its $2.67B portfolio in Q2 2026.
  • Portolan Capital Management opened 36 new positions and closed 32 in Q2 2026.
  • Portolan Capital Management's portfolio value rose 42% quarter-over-quarter to $2.67B.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.