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Latest Portolan Capital Management, LLC Stock Portfolio

$1.88Billion– No. of Holdings #144

Portolan Capital Management, LLC Performance:
2026 Q1: 0.74%YTD: 0.74%2025: 17.31%
Performance for 2026 Q1 is 0.74%, and YTD is 0.74%, and 2025 is 17.31%.

About Portolan Capital Management, LLC and 13F Hedge Fund Stock Holdings

On 2026-05-15, the fund reported it's updated stock portfolio. In the 13F Holdings report, Portolan Capital Management, LLC reported an equity portfolio of $1.9 Billions as of 31 Mar, 2026.

The top stock holdings of Portolan Capital Management, LLC are MOD, TTMI, CLS. The fund has invested 4.8% of it's portfolio in MODINE MFG CO and 3.8% of portfolio in TTM TECHNOLOGIES INC.

The fund managers got completely rid off FIRST SOLAR INC (FSLR), FIRST AMERN FINL CORP (FAF) and SPHERE ENTERTAINMENT CO (MSGE) stocks. They significantly reduced their stock positions in DOMO INC (DOMO), ESTABLISHMENT LABS HLDGS INC (ESTA) and TRANSMEDICS GROUP INC (TMDX). Portolan Capital Management, LLC opened new stock positions in PAR PAC HOLDINGS INC (PARR), PBF ENERGY INC (PBF) and MURPHY USA INC (MUSA). The fund showed a lot of confidence in some stocks as they added substantially to CRESCENT ENERGY COMPANY (CRGY), FABRINET (FN) and QUALYS INC (QLYS).
Portolan Capital Management, LLC Equity Portfolio Value
Last Reported on: 15 May, 2026

Portolan Capital Management, LLC Annual Return Estimates Vs S&P 500

Our best estimate is that Portolan Capital Management, LLC made a return of 0.74% in the last quarter. In trailing 12 months, it's portfolio return was 31.99%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
par pac holdings inc43,461,800
pbf energy inc38,095,900
murphy usa inc23,763,400
circle internet group inc20,398,300
dht holdings inc19,947,000
hafnia ltd14,810,200
amer sports inc11,779,600
evolv technologies hldngs in10,863,900
New stocks bought by Portolan Capital Management, LLC

Additions

Ticker% Inc.
crescent energy company6,419
fabrinet403
qualys inc360
okeanis eco tankers cor233
virtu finl inc222
talos energy inc189
adeia inc184
xpeng inc184
Additions to existing portfolio by Portolan Capital Management, LLC

Reductions

Ticker% Reduced
domo inc-90.87
establishment labs hldgs inc-89.89
transmedics group inc-88.97
applied optoelectronics inc-86.94
dana inc-86.44
guardant health inc-86.4
radnet inc-79.81
tower semiconductor ltd-78.43
Portolan Capital Management, LLC reduced stake in above stock

Sold off

Ticker$ Sold
olaplex hldgs inc-4,130,680
snap inc-12,076,000
sweetgreen inc-5,733,060
indie semiconductor inc-2,372,150
opera ltd-8,937,470
nu skin enterprises inc-5,740,480
ramaco res inc-10,110,900
similarweb ltd-3,691,530
Portolan Capital Management, LLC got rid off the above stocks

Sector Distribution

Portolan Capital Management, LLC has about 29.1% of it's holdings in Others sector.

  • Others
  • Technology
  • Healthcare
  • Industrials
  • Consumer Cyclical
  • Energy
  • Financial Services
  • Consumer Defensive
  • Communication Services
Sector%
Others29.1
Technology25.3
Healthcare11.3
Industrials10.3
Consumer Cyclical8.6
Energy7.4
Financial Services4.1
Consumer Defensive1.3
Communication Services1.2

Market Cap. Distribution

Portolan Capital Management, LLC has about 20.9% of it's portfolio invested in the large-cap and mega-cap stocks.

  • MID-CAP
  • UNALLOCATED
  • LARGE-CAP
  • SMALL-CAP
  • MICRO-CAP
Category%
MID-CAP31.7
UNALLOCATED28.1
LARGE-CAP20.9
SMALL-CAP15.9
MICRO-CAP2.7

Stocks belong to which Index?

About 54.8% of the stocks held by Portolan Capital Management, LLC either belong to S&P 500 or RUSSELL 2000 index.

  • RUSSELL 2000
  • Others
  • S&P 500
Index%
RUSSELL 200049.3
Others45.2
S&P 5005.5
Top 5 Winners (%)%
LITE
lumentum hldgs inc
90.7 %
AAOI
applied optoelectronics inc
80.6 %
LINC
lincoln edl svcs corp
68.5 %
POWL
powell inds inc
68.3 %
MOD
modine mfg co
55.1 %
Top 5 Winners ($)$
MOD
modine mfg co
39.4 M
TTMI
ttm technologies inc
26.6 M
POWL
powell inds inc
17.2 M
AKAM
akamai technologies inc
13.1 M
VIRT
virtu finl inc
8.5 M
Top 5 Losers (%)%
GENI
genius sports limited
-58.3 %
TGEN
tecogen inc new
-48.1 %
SMFR
genedx holdings corp
-44.2 %
SPT
sprout social inc
-42.9 %
UPWK
upwork inc
-37.1 %
Top 5 Losers ($)$
CSTL
castle biosciences inc
-22.1 M
GENI
genius sports limited
-18.9 M
REAX
the real brokerage inc
-14.5 M
QTRX
quanterix corp
-10.6 M
UPWK
upwork inc
-10.1 M

Portolan Capital Management, LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of Portolan Capital Management, LLC

Portolan Capital Management, LLC has 144 stocks in it's portfolio. About 28% of the portfolio is in top 10 stocks. CSTL proved to be the most loss making stock for the portfolio. MOD was the most profitable stock for Portolan Capital Management, LLC last quarter.

Last Reported on: 15 May, 2026
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions