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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
GTES icon
51
Gates Industrial Corp
GTES
$6.57B
$17.9M 0.67%
+641,587
New +$16.5M
MAMA icon
52
Mama's Creations
MAMA
$715M
$17.6M 0.66%
984,869
-192,067
-16% -$2.91M
KRUS icon
53
Kura Sushi USA
KRUS
$537M
$17.4M 0.65%
302,010
+798
+0.3% +$43.7K
SANM icon
54
Sanmina
SANM
$10.6B
$17.3M 0.65%
68,255
+40,923
+150% +$8.97M
PKE icon
55
Park Aerospace
PKE
$680M
$17.1M 0.64%
447,390
+36,735
+9% +$1.22M
GHM icon
56
Graham Corp
GHM
$1.03B
$16.9M 0.63%
136,925
+33,369
+32% +$3.31M
BELFB
57
Bel Fuse Inc Class B
BELFB
$3.52B
$15.9M 0.6%
47,856
-5,314
-10% -$1.44M
ONON icon
58
On Holding
ONON
$9.35B
$15.6M 0.59%
441,137
+238,693
+118% +$8.72M
AS icon
59
Amer Sports
AS
$17.2B
$15.3M 0.57%
452,880
+95,054
+27% +$3.33M
COHU icon
60
Cohu
COHU
$2.4B
$15.2M 0.57%
+206,120
New +$10.3M
JBL icon
61
Jabil
JBL
$32.5B
$15M 0.56%
38,929
-38,268
-50% -$13.2M
ADEA icon
62
Adeia
ADEA
$2.92B
$14.6M 0.55%
443,060
-286,401
-39% -$8.45M
VICR icon
63
Vicor
VICR
$8.69B
$14.5M 0.54%
38,081
+11,411
+43% +$3.12M
TENB icon
64
Tenable Holdings
TENB
$3.77B
$14.3M 0.54%
+387,923
New +$9.12M
GEHC icon
65
GE HealthCare
GEHC
$31.1B
$14.2M 0.53%
+222,393
New +$14.6M
CXT icon
66
Crane NXT
CXT
$2.88B
$13.9M 0.52%
+271,524
New +$11.6M
PACK icon
67
Ranpak Holdings
PACK
$389M
$13.9M 0.52%
1,894,855
-52,826
-3% -$305K
ONTO icon
68
Onto Innovation
ONTO
$13.2B
$13.8M 0.52%
36,503
+14,240
+64% +$4.03M
WGS icon
69
GeneDx Holdings
WGS
$2.56B
$13.8M 0.51%
200,315
+97,740
+95% +$5.55M
FORR icon
70
Forrester Research
FORR
$241M
$13.7M 0.51%
1,623,925
+82,649
+5% +$540K
HZO icon
71
MarineMax
HZO
$1.15B
$12.6M 0.47%
+344,358
New +$11.1M
BIO icon
72
Bio-Rad Laboratories Class A
BIO
$10.3B
$12.5M 0.47%
42,620
+28,447
+201% +$8.07M
QMCO icon
73
Quantum Corp
QMCO
$975M
$11.2M 0.42%
+1,020,120
New +$9.79M
BIDU icon
74
Baidu
BIDU
$33.7B
$11M 0.41%
95,863
-270,566
-74% -$33.5M
RACE icon
75
Ferrari
RACE
$72.1B
$10.8M 0.41%
+29,079
New +$10.1M
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.