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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
+14.56%
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
$1.88B
AUM Growth
+$12.5M
Cap. Flow
-$57.3M
Cap. Flow %
-3.05%
Top 10 Hldgs %
27.97%
Holding
185
New
30
Increased
49
Reduced
61
Closed
41

Top Buys

Rank Stock Value
1
VIRT icon
Virtu Financial
VIRT
+$32.5M
2
PARR icon
Par Pacific Holdings
PARR
+$31.1M
3
PBF icon
PBF Energy
PBF
+$30M
4
CRGY icon
Crescent Energy
CRGY
+$26.8M
5
FN icon
Fabrinet
FN
+$22.3M

Top Sells

Rank Stock Value
1
TTMI icon
TTM Technologies
TTMI
+$39.9M
2
MOD icon
Modine Manufacturing
MOD
+$23.3M
3
FSLR icon
First Solar
FSLR
+$20.6M
4
LASR icon
nLIGHT
LASR
+$19.8M
5
FAF icon
First American
FAF
+$19.7M

Sector Composition

Rank Sector Weight
1 Technology 34.42%
2 Consumer Discretionary 13.66%
3 Industrials 12.34%
4 Healthcare 11.94%
5 Energy 9.75%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
STC icon
176
Stewart Information Services
STC
$2.12B
– –
-117,708
Closed -$8.27M
TECH icon
177
Bio-Techne
TECH
$11.2B
– –
-249,070
Closed -$14.6M
TGLS icon
178
Tecnoglass
TGLS
$2.01B
– –
-238,852
Closed -$12M
VRT icon
179
Vertiv
VRT
$116B
– –
-9,039
Closed -$1.46M
WAT icon
180
Waters Corp
WAT
$36.4B
– –
-22,379
Closed -$8.5M
WEAV icon
181
Weave Communications
WEAV
$489M
– –
-47,600
Closed -$361K
WIX icon
182
WIX.com
WIX
$2.04B
– –
-80,298
Closed -$8.34M
ZG icon
183
Zillow
ZG
$7.17B
– –
-150,068
Closed -$10.2M
RDDT icon
184
Reddit
RDDT
$32.8B
– –
-3,558
Closed -$818K
MRX
185
Marex Group Limited Ordinary Shares
MRX
$4.74B
– –
-418,745
Closed -$16.1M
4 5 6 7
8

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Portolan Capital Management's Q1 2026 Portfolio in Review

As of Q1 2026, Portolan Capital Management held 185 positions worth $1.88B, up 0.67% from $1.87B the previous quarter. Its ten largest holdings account for 28% of the portfolio.

Portolan Capital Management withdrew a net $57.3M in Q1 2026, closing 41 positions and reducing 61 holdings. Its most notable exit was First Solar, an estimated $20.6M position sold in full.

By sector, the portfolio is most concentrated in Technology at 34% of assets, down from 39% a quarter earlier, followed by Consumer Discretionary and Industrials.

Against the trend, Portolan Capital Management opened a new position in Par Pacific Holdings worth $43.5M.

  • Portolan Capital Management's largest Q1 2026 buy was Par Pacific Holdings: 693,834 shares worth $43.5M.
  • Portolan Capital Management added most to Virtu Financial in Q1 2026, an estimated $32.5M increase.
  • Portolan Capital Management's biggest Q1 2026 reduction was TTM Technologies, cutting an estimated $39.9M.
  • Portolan Capital Management fully exited First Solar in Q1 2026, selling an estimated $20.6M.
  • Portolan Capital Management's ten largest holdings make up 28% of its $1.88B portfolio in Q1 2026.
  • Portolan Capital Management opened 30 new positions and closed 41 in Q1 2026.
  • Portolan Capital Management's portfolio value rose 0.67% quarter-over-quarter to $1.88B.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.