Latest Portolan Capital Management, LLC Stock Portfolio

Portolan Capital Management, LLC Performance:

2025 Q4: 0.77%YTD: 17.31%2024: 32.66%

Performance for 2025 Q4 is 0.77%, and YTD is 17.31%, and 2024 is 32.66%.

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

On 2026-02-17, 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 Dec, 2025.

The top stock holdings of Portolan Capital Management, LLC are TTMI, MOD, CSTL. The fund has invested 4.2% of it's portfolio in TTM TECHNOLOGIES INC and 3.8% of portfolio in MODINE MFG CO.

The fund managers got completely rid off WOLVERINE WORLD WIDE INC (WWW), POWER SOLUTIONS INTL INC (PSIX) and CELSIUS HLDGS INC (CELH) stocks. They significantly reduced their stock positions in LINCOLN EDL SVCS CORP (LINC), SOLARIS ENERGY INFRAS INC (SOI) and SHOALS TECHNOLOGIES GROUP IN (SHLS). Portolan Capital Management, LLC opened new stock positions in AKAMAI TECHNOLOGIES INC (AKAM), FIRST AMERN FINL CORP (FAF) and JABIL INC (JBL). The fund showed a lot of confidence in some stocks as they added substantially to BAIDU INC (BIDU), RANPAK HOLDINGS CORP (PACK) and PULSE BIOSCIENCES INC (PLSE).

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

Our best estimate is that Portolan Capital Management, LLC made a return of 0.77% in the last quarter. In trailing 12 months, it's portfolio return was 17.31%.

Performance
S&P 500

New Buys

Ticker	$ Bought
akamai technologies inc	45,747,000
first amern finl corp	19,702,000
jabil inc	16,113,000
marex group plc	16,063,100
biogen inc	14,957,400
bio-techne corp	14,647,800
freeport-mcmoran inc	14,633,800
magna intl inc	13,617,100

New stocks bought by Portolan Capital Management, LLC

Additions

Ticker	% Inc.
baidu inc	5,657
ranpak holdings corp	518
pulse biosciences inc	285
willdan group inc	232
sweetgreen inc	166
shift4 pmts inc	147
tecnoglass inc	118
united therapeutics corp del	103

Additions to existing portfolio by Portolan Capital Management, LLC

Reductions

Ticker	% Reduced
lincoln edl svcs corp	-95.62
solaris energy infras inc	-94.64
shoals technologies group in	-91.07
vertiv holdings co	-91.01
reddit inc	-89.7
planet labs pbc	-89.11
lumentum hldgs inc	-88.23
everus constr group	-88.04

Portolan Capital Management, LLC reduced stake in above stock

Sold off

Ticker	$ Sold
wolverine world wide inc	-21,859,400
custom truck one source inc	-4,167,070
acuren corp	-6,295,020
blacksky technology inc	-7,854,510
sportsmans whse hldgs inc	-841,526
levi strauss &co new	-4,991,350
power solutions intl inc	-19,231,900
ameresco inc	-5,873,240

Portolan Capital Management, LLC got rid off the above stocks

Sector Distribution

Portolan Capital Management, LLC has about 30.8% of it's holdings in Technology sector.

Sector	%
Technology	30.8
Others	25.2
Healthcare	16.8
Consumer Cyclical	8.3
Industrials	7.6
Financial Services	3.7
Basic Materials	2
Consumer Defensive	1.8
Real Estate	1.7
Communication Services	1.6

Market Cap. Distribution

Portolan Capital Management, LLC has about 21.7% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MID-CAP	28.7
UNALLOCATED	24.3
LARGE-CAP	20.4
SMALL-CAP	19.3
MICRO-CAP	5.9
MEGA-CAP	1.3

Stocks belong to which Index?

About 58.2% of the stocks held by Portolan Capital Management, LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
RUSSELL 2000	49.4
Others	41.8
S&P 500	8.8

Top 5 Winners (%)		%
LITE	lumentum hldgs inc	70.7 %
CSTL	castle biosciences inc	63.6 %
ESTA	establishment labs hldgs inc	62.6 %
CIEN	ciena corp	49.5 %
MSGE	sphere entertainment co	48.9 %

Top 5 Winners ($)		$
CSTL	castle biosciences inc	26.2 M
TTMI	ttm technologies inc	13.3 M
DBRG	digitalbridge group inc	11.5 M
TSEM	tower semiconductor ltd	10.7 M
CLS	celestica inc	10.4 M

Top 5 Losers (%)		%
DOMO	domo inc	-42.2 %
PRCH	porch group inc	-42.1 %
TGEN	tecogen inc new	-38.4 %
WIX	wix com ltd	-38.1 %
ORCL	oracle corp	-30.7 %

Top 5 Losers ($)		$
ELF	e l f beauty inc	-19.2 M
DOMO	domo inc	-17.9 M
PRCH	porch group inc	-13.8 M
AVAV	aerovironment inc	-8.2 M
KTOS	kratos defense &sec solutio	-6.9 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 155 stocks in it's portfolio. About 26.4% of the portfolio is in top 10 stocks. ELF proved to be the most loss making stock for the portfolio. CSTL was the most profitable stock for Portolan Capital Management, LLC last quarter.

Last Reported on: 17 Feb, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AAOI	applied optoelectronics inc	0.43	228,458	7,964,050	reduced	-58.17

ACMR	acm resh inc	0.60	285,506	11,263,200	reduced	-29.65

AKAM	akamai technologies inc	2.45	524,321	45,747,000	new

AMBA	ambarella inc	0.21	54,242	3,842,500	new

AMOT	allient inc	0.87	301,888	16,226,500	added	17.17

AMPL	amplitude inc	0.35	560,096	6,485,910	new

AMPY	amplify energy corp new	0.02	89,063	407,018	new

AMRC	ameresco inc	0.00	0.00	0.00	sold off	-100

ARE	alexandria real estate eq in	0.11	43,555	2,131,580	new

AVAV	aerovironment inc	0.98	75,958	18,373,500	reduced	-48.65

BAND	bandwidth inc	0.28	336,874	5,204,700	reduced	-54.83

BELFB	bel fuse inc	1.27	139,513	23,665,600	added	12.72

BIDU	baidu inc	1.85	263,681	34,452,600	added	5,657

BIIB	biogen inc	0.80	84,990	14,957,400	new

BIO	bio rad labs inc	0.56	34,159	10,349,800	reduced	-26.44

BKSY	blacksky technology inc	0.00	0.00	0.00	sold off	-100

BXC	bluelinx hldgs inc	0.00	0.00	0.00	sold off	-100

CADL	candel therapeutics inc	0.51	1,695,370	9,578,820	added	22.49

CDNA	caredx inc	0.77	758,775	14,295,300	reduced	-18.72

CELH	celsius hldgs inc	0.00	0.00	0.00	sold off	-100