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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
VPG icon
1
Vishay Precision Group
VPG
$839M
$151M 5.66%
1,008,167
-11,701
-1% -$1.09M
VIRT icon
2
Virtu Financial
VIRT
$5.69B
$128M 4.78%
2,142,215
+930,328
+77% +$48.9M
TTMI icon
3
TTM Technologies
TTMI
$13.2B
$95M 3.56%
507,838
-219,656
-30% -$35.4M
MOD icon
4
Modine Manufacturing
MOD
$10.3B
$83.8M 3.14%
313,683
-98,409
-24% -$25.9M
QLYS icon
5
Qualys
QLYS
$5.94B
$72.8M 2.73%
529,807
+290,779
+122% +$28.6M
FOUR icon
6
Shift4
FOUR
$3.63B
$54.2M 2.03%
1,114,116
+899,832
+420% +$38.9M
MEC icon
7
Mayville Engineering Co
MEC
$501M
$48.7M 1.82%
1,299,256
+478,120
+58% +$12.8M
ENVA icon
8
Enova International
ENVA
$5.74B
$47.9M 1.79%
198,795
+117,872
+146% +$20.3M
SMTC icon
9
Semtech
SMTC
$13.8B
$47.7M 1.79%
294,619
-37,708
-11% -$4.93M
CLS icon
10
Celestica
CLS
$39.4B
$46.3M 1.73%
126,856
-71,007
-36% -$26.6M
UTHR icon
11
United Therapeutics
UTHR
$20.9B
$44.2M 1.65%
81,518
+18,083
+29% +$10.2M
GENI icon
12
Genius Sports
GENI
$2B
$42.6M 1.59%
7,025,809
+4,234,791
+152% +$21.9M
POWL icon
13
Powell Industries
POWL
$6.6B
$41.7M 1.56%
145,631
-81,859
-36% -$22.2M
PENG
14
Penguin Solutions Inc
PENG
$2.65B
$41.5M 1.55%
+546,173
New +$24.8M
DAVE icon
15
Dave Inc
DAVE
$4.86B
$39.2M 1.47%
105,338
-104
-0.1% -$27K
FLEX icon
16
Flex
FLEX
$40.5B
$37.1M 1.39%
229,027
-214,101
-48% -$26M
ALNT icon
17
Allient
ALNT
$1.61B
$37M 1.39%
359,685
+36,232
+11% +$2.8M
PRCH icon
18
Porch Group
PRCH
$2.04B
$36.9M 1.38%
2,456,451
+311,561
+15% +$3.07M
AKAM icon
19
Akamai
AKAM
$15.1B
$36.7M 1.37%
310,361
-113,081
-27% -$14.1M
CADL icon
20
Candel Therapeutics
CADL
$978M
$36M 1.35%
3,490,398
+596,073
+21% +$4.5M
TLN
21
Talen Energy Corp
TLN
$15.2B
$34.7M 1.3%
90,312
+8,738
+11% +$3.2M
RRX icon
22
Regal Rexnord
RRX
$10.8B
$32.8M 1.23%
137,498
+83,523
+155% +$17.5M
LNTH icon
23
Lantheus
LNTH
$6.59B
$32M 1.2%
288,691
-128,699
-31% -$12M
BIIB icon
24
Biogen
BIIB
$32.6B
$30.9M 1.16%
142,856
+24,375
+21% +$4.66M
VECO icon
25
Veeco
VECO
$2.73B
$30.4M 1.14%
401,639
+148,260
+59% +$8.45M
1
2 3 4 5

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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.