Latest Atika Capital Management LLC Stock Portfolio

Atika Capital Management LLC Performance:

2025 Q4: 6.32%YTD: 27.16%2024: 21.12%

Performance for 2025 Q4 is 6.32%, and YTD is 27.16%, and 2024 is 21.12%.

About Atika Capital Management LLC and 13F Hedge Fund Stock Holdings

On 2026-02-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, Atika Capital Management LLC reported an equity portfolio of $949.8 Millions as of 31 Dec, 2025.

The top stock holdings of Atika Capital Management LLC are VRT, LLY, ISRG. The fund has invested 10.8% of it's portfolio in VERTIV HOLDINGS CO and 4.7% of portfolio in ELI LILLY & CO.

The fund managers got completely rid off MICROSOFT CORP (MSFT), SPOTIFY TECHNOLOGY S A (SPOT) and MARTIN MARIETTA MATLS INC (MLM) stocks. They significantly reduced their stock positions in AMAZON COM INC (AMZN), ROBINHOOD MKTS INC (HOOD) and SEAGATE TECHNOLOGY HLDNGS (STX). Atika Capital Management LLC opened new stock positions in MADRIGAL PHARMACEUTICALS (MDGL), COGENT BIOSCIENCES INC (COGT) and ALPHABET INC (GOOG). The fund showed a lot of confidence in some stocks as they added substantially to TEVA PHARMACEUTICAL INDS (TEVA), XENON PHARMACEUTICALS INC (XENE) and IONIS PHARMACEUTICALS INC (IONS).

Atika Capital Management LLC Annual Return Estimates Vs S&P 500

Our best estimate is that Atika Capital Management LLC made a return of 6.32% in the last quarter. In trailing 12 months, it's portfolio return was 27.16%.

Performance
S&P 500

New Buys

Ticker	$ Bought
madrigal pharmaceuticals	19,799,600
cogent biosciences inc	17,973,100
alphabet inc	13,242,400
terns pharmaceuticals inc	12,975,100
mongodb inc	9,370,000
heico corp new	8,510,420
qxo inc	8,101,800
carlisle cos inc	8,092,460

New stocks bought by Atika Capital Management LLC

Additions

Ticker	% Inc.
teva pharmaceutical inds	220
xenon pharmaceuticals inc	143
ionis pharmaceuticals inc	120
figure technology solutio	106
echostar corp	80.88
lemonade inc	65.1
shopify inc	57.96
the realreal inc	51.07

Additions to existing portfolio by Atika Capital Management LLC

Reductions

Ticker	% Reduced
amazon com inc	-79.85
robinhood mkts inc	-57.44
seagate technology hldngs	-56.05
roku inc	-54.14
alnylam pharmaceuticals inc	-53.44
bwx technologies inc	-49.91
cloudflare inc	-43.99
talen energy corp	-39.25

Atika Capital Management LLC reduced stake in above stock

Sold off

Ticker	$ Sold
rxsight inc	-3,190,610
national vision hldgs inc	-8,786,190
zura bio ltd	-1,195,080
siriuspoint ltd	-4,703,400
arista networks inc	-33,689,300
glaukos corp	-17,321,200
inspire med sys inc	-13,919,900
nebius group n.v.	-20,195,100

Atika Capital Management LLC got rid off the above stocks

Sector Distribution

Atika Capital Management LLC has about 31.1% of it's holdings in Healthcare sector.

Sector	%
Healthcare	31.1
Industrials	22.9
Technology	13.4
Others	13.4
Consumer Cyclical	10.8
Communication Services	6.6
Financial Services	1.5

Market Cap. Distribution

Atika Capital Management LLC has about 67.2% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
LARGE-CAP	51.3
MEGA-CAP	15.9
MID-CAP	15.9
UNALLOCATED	13.4
NANO-CAP	1.9
SMALL-CAP	1.7

Stocks belong to which Index?

About 43.1% of the stocks held by Atika Capital Management LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
Others	56.9
S&P 500	23
RUSSELL 2000	20.1

Top 5 Winners (%)		%
GH	guardant health inc	57.5 %
CIEN	ciena corp	53.0 %
	abivax sa	52.9 %
AXSM	axsome therapeutics inc	46.1 %
LLY	eli lilly & co	40.9 %

Top 5 Winners ($)		$
LLY	eli lilly & co	12.8 M
VRT	vertiv holdings co	7.0 M
ISRG	intuitive surgical inc	6.8 M
CIEN	ciena corp	6.2 M
TEVA	teva pharmaceutical inds	5.2 M

Top 5 Losers (%)		%
NFLX	netflix inc	-21.8 %
APPF	appfolio inc	-15.6 %
HOOD	robinhood mkts inc	-15.0 %
DASH	doordash inc	-14.5 %
MELI	mercadolibre inc	-12.1 %

Top 5 Losers ($)		$
NFLX	netflix inc	-4.7 M
	talen energy corp	-2.8 M
HOOD	robinhood mkts inc	-2.6 M
DASH	doordash inc	-2.5 M
MELI	mercadolibre inc	-2.2 M

Atika Capital Management LLC Holdings Map

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

Current Stock Holdings of Atika Capital Management LLC

Atika Capital Management LLC has 64 stocks in it's portfolio. About 33% of the portfolio is in top 10 stocks. NFLX proved to be the most loss making stock for the portfolio. LLY was the most profitable stock for Atika Capital Management LLC last quarter.

Last Reported on: 13 Feb, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AAOI	applied optoelectronics inc	0.32	87,657	3,055,720	new

ADBE	adobe inc	0.00	0.00	0.00	sold off	-100

ALNY	alnylam pharmaceuticals inc	0.43	10,339	4,111,300	reduced	-53.44

AMZN	amazon com inc	1.94	80,000	18,465,600	reduced	-79.85

ANET	arista networks inc	0.00	0.00	0.00	sold off	-100

ANF	abercrombie & fitch co	0.38	29,000	3,650,230	new

APPF	appfolio inc	1.09	44,500	10,352,900	unchanged	0.00

ASML	asml holding n v	0.00	0.00	0.00	sold off	-100

ASND	ascendis pharma a/s	0.46	20,642	4,401,700	reduced	-6.85

AVGO	broadcom inc	0.00	0.00	0.00	sold off	-100

AXSM	axsome therapeutics inc	1.07	55,500	10,136,500	added	13.27

BBWI	bath & body works inc	0.48	225,000	4,518,000	new

BWXT	bwx technologies inc	1.98	108,900	18,822,300	reduced	-49.91

CALX	calix inc	0.00	0.00	0.00	sold off	-100

CECE	ceco environmental corp	0.19	29,804	1,783,770	new

CEG	constellation energy corp	0.00	0.00	0.00	sold off	-100

CIEN	ciena corp	1.48	60,000	14,032,200	reduced	-25.00

CLH	clean harbors inc	0.07	3,000	703,440	new

COGT	cogent biosciences inc	1.89	506,000	17,973,100	new

CSL	carlisle cos inc	0.85	25,300	8,092,460	new