Atika Capital Management LLC Top Holdings and 13F Report (2026)

About Atika Capital Management LLC

Investment Activity

Atika Capital Management LLC has $796.37 million in total holdings as of March 31, 2026.
Atika Capital Management LLC owns shares of 56 different stocks, but just 25 companies or ETFs make up 80% of its holdings.
Approximately 19.62% of the portfolio was purchased this quarter.
About 46.29% of the portfolio was sold this quarter.
This quarter, Atika Capital Management LLC has purchased 74 new stocks and bought additional shares in 13 stocks.
Atika Capital Management LLC sold shares of 24 stocks and completely divested from 34 stocks this quarter.

Largest Holdings

Vertiv: $166,911,338
SPDR S&P Biotech ETF: $53,965,925
EchoStar: $39,838,921
Eli Lilly and Company: $37,802,547
Netflix: $33,171,751

Largest New Holdings this Quarter

92189F676 - VanEck Semiconductor ETF: $27,604,800 Holding
92189F106 - VanEck Gold Miners ETF: $21,107,100 Holding
687604108 - ORUKA THERAPEUTICS INC: $11,276,595 Holding
958102105 - Western Digital: $10,202,072 Holding
91307C102 - United Therapeutics: $7,323,304 Holding

Largest Purchases this Quarter

VanEck Semiconductor ETF: 720 shares (about $27.60M)
VanEck Gold Miners ETF: 81,500 shares (about $21.11M)
EchoStar: 54,794 shares (about $11.89M)
ORUKA THERAPEUTICS INC: 229,900 shares (about $11.28M)
Western Digital: 37,717 shares (about $10.20M)

Largest Sales this Quarter

SPDR S&P Biotech ETF: 5,400 shares (about $68.97M)
Cogent Biosciences: 212,800 shares (about $8.19M)
Amazon.com: 36,300 shares (about $7.56M)
TALEN ENERGY CORP: 23,610 shares (about $7.54M)
Teva Pharmaceutical Industries: 243,000 shares (about $7.32M)

Sector Allocation Over Time

Selling

Neutral

Buying

Latest 13F Holdings and Changes Since Previous Quarterly Filing

Issuer Name	Holdings Value	Approximate Purchase/Sale	Change in Shares	Shares Held	% of Portfolio	Sector
VRT Vertiv	$166,911,338	$7,517,400 â–²	4.7%	666,100	21.0%	Computer and Technology
XBI SPDR S&P Biotech ETF	$53,965,925	$68,974,200 â–¼	-56.1%	4,225	6.8%	ETF
SATS EchoStar	$39,838,921	$11,890,719 â–²	42.5%	183,583	5.0%	Computer and Technology
LLY Eli Lilly and Company	$37,802,547		0.0%	41,100	4.7%	Medical
NFLX Netflix	$33,171,751	$301,312 â–²	0.9%	181,650	4.2%	Consumer Discretionary
SMH VanEck Semiconductor ETF	$27,604,800	$27,604,800 â–²	New Holding	720	3.5%	Manufacturing
ISRG Intuitive Surgical	$26,376,003		0.0%	57,216	3.3%	Medical
IWM iShares Russell 2000 ETF	$24,800,000	$2,232,000 â–²	9.9%	1,000	3.1%	Finance
GDX VanEck Gold Miners ETF	$21,107,100	$21,107,100 â–²	New Holding	81,500	2.7%	ETF
STX Seagate Technology	$20,959,160	$624,074 â–²	3.1%	53,500	2.6%	Computer and Technology
TERN Terns Pharmaceuticals	$19,611,840	$1,333,347 â–¼	-6.4%	300,720	2.5%	Medical
MTZ MasTec	$18,543,806	$527,010 â–²	2.9%	57,636	2.3%	Construction
CIEN Ciena	$16,946,628	$6,347,172 â–¼	-27.2%	43,651	2.1%	Computer and Technology
BWXT BWX Technologies	$16,880,650	$5,388,312 â–¼	-24.2%	82,550	2.1%	Aerospace
TEVA Teva Pharmaceutical Industries	$14,367,240	$7,319,160 â–¼	-33.8%	477,000	1.8%	Medical
NET Cloudflare	$13,412,100	$2,084,034 â–²	18.4%	65,000	1.7%	Computer and Technology
GOOG Alphabet	$12,406,695	$301,203 â–²	2.5%	43,250	1.6%	Computer and Technology
COGT Cogent Biosciences	$11,285,268	$8,190,672 â–¼	-42.1%	293,200	1.4%	Medical
ORUKA THERAPEUTICS INC	$11,276,595	$11,276,595 â–²	New Holding	229,900	1.4%	COM
DIANTHUS THERAPEUTICS INC	$10,808,896	$480,694 â–¼	-4.3%	128,800	1.4%	COM
WDC Western Digital	$10,202,072	$10,202,072 â–²	New Holding	37,717	1.3%	Computer and Technology
AMZN Amazon.com	$9,101,400	$7,560,202 â–¼	-45.4%	43,700	1.1%	Retail/Wholesale
TTMI TTM Technologies	$9,060,060	$825,440 â–¼	-8.4%	93,000	1.1%	Computer and Technology
FIVE Five Below	$9,020,390	$3,820,185 â–¼	-29.8%	39,480	1.1%	Retail/Wholesale
CW Curtiss-Wright	$8,854,560	$2,123,732 â–²	31.6%	13,000	1.1%	Aerospace
GH Guardant Health	$8,405,670	$1,570,290 â–¼	-15.7%	91,000	1.1%	Medical
MELI MercadoLibre	$7,797,881	$2,484,602 â–¼	-24.2%	4,510	1.0%	Retail/Wholesale
APPF AppFolio	$7,496,450	$473,460 â–²	6.7%	47,500	0.9%	Computer and Technology
UTHR United Therapeutics	$7,323,304	$7,323,304 â–²	New Holding	12,350	0.9%	Medical
KARMAN HLDGS INC	$7,244,526	$7,244,526 â–²	New Holding	90,500	0.9%	COMMON STOCK
FERGUSON ENTERPRISES INC	$6,834,518		0.0%	29,300	0.9%	COMMON STOCK NEW
PTGX Protagonist Therapeutics	$6,545,339	$2,519,060 â–¼	-27.8%	62,100	0.8%	Medical
CLH Clean Harbors	$6,266,484	$5,406,294 â–²	628.5%	21,855	0.8%	Business Services
TALEN ENERGY CORP	$5,902,563	$7,537,021 â–¼	-56.1%	18,490	0.7%	COM
IMNM Immunome	$5,749,623	$1,562,415 â–¼	-21.4%	262,900	0.7%	Medical
META Meta Platforms	$5,721,300	$5,721,300 â–²	New Holding	10,000	0.7%	Computer and Technology
DBV TECHNOLOGIES S A	$5,667,456	$1,345,713 â–²	31.1%	271,300	0.7%	SPONSORED ADS
ROCKET LAB CORP	$5,522,920	$1,533,895 â–²	38.5%	86,000	0.7%	COM
HEI Heico	$5,282,464	$1,928,997 â–¼	-26.7%	19,265	0.7%	Aerospace
QXO INC	$5,131,794	$3,024,607 â–¼	-37.1%	264,253	0.6%	COM NEW
SITM SiTime	$5,112,907	$5,112,907 â–²	New Holding	14,805	0.6%	Computer and Technology
INTC Intel	$4,413,000	$4,413,000 â–²	New Holding	1,000	0.6%	Computer and Technology
GE GE Aerospace	$4,401,273	$2,961,991 â–¼	-40.2%	15,510	0.6%	Aerospace
ASND Ascendis Pharma A/S	$4,374,461	$346,983 â–¼	-7.3%	19,125	0.5%	Medical
REAL RealReal	$4,095,579	$1,034,620 â–¼	-20.2%	451,055	0.5%	Consumer Discretionary
LASR nLight	$3,763,320	$3,763,320 â–²	New Holding	66,000	0.5%	Computer and Technology
XENE Xenon Pharmaceuticals	$3,483,185	$1,896,039 â–¼	-35.2%	59,900	0.4%	Medical
BBB FOODS INC	$3,367,861	$1,664,654 â–¼	-33.1%	95,218	0.4%	CL A COM
MAZE THERAPEUTICS INC	$3,328,276	$3,328,276 â–²	New Holding	111,500	0.4%	COM
ABIVAX SA	$3,206,880	$2,917,370 â–¼	-47.6%	28,800	0.4%	SPONSORED ADS
ACHC Acadia Healthcare	$2,867,613	$2,867,613 â–²	New Holding	122,600	0.4%	Medical
WRBY Warby Parker	$2,844,450	$2,401,369 â–¼	-45.8%	135,000	0.4%	Consumer Staples
KRYS Krystal Biotech	$2,744,650	$2,744,650 â–²	New Holding	10,625	0.3%	Medical
BBIO BridgeBio Pharma	$2,613,952	$2,613,952 â–²	New Holding	35,200	0.3%	Medical
HUT 8 CORP	$2,312,663	$2,312,663 â–²	New Holding	49,300	0.3%	COM
HEI.A Heico	$2,232,277	$2,232,277 â–²	New Holding	10,575	0.3%	Aerospace
SHOPIFY INC	$0	$19,960,280 â–¼	-100.0%	0	0.0%	CL A SUB VTG SHS
MDGL Madrigal Pharmaceuticals	$0	$19,799,560 â–¼	-100.0%	0	0.0%	Medical
HOOD Robinhood Markets	$0	$13,741,650 â–¼	-100.0%	0	0.0%	Finance
TSLA Tesla	$0	$13,491,600 â–¼	-100.0%	0	0.0%	Auto/Tires/Trucks
INSM Insmed	$0	$13,435,888 â–¼	-100.0%	0	0.0%	Medical
DOORDASH INC	$0	$10,418,080 â–¼	-100.0%	0	0.0%	CL A
AXSM Axsome Therapeutics	$0	$10,136,520 â–¼	-100.0%	0	0.0%	Medical
MDB MongoDB	$0	$9,369,999 â–¼	-100.0%	0	0.0%	Computer and Technology
LMND Lemonade	$0	$8,108,612 â–¼	-100.0%	0	0.0%	Finance
CSL Carlisle Companies	$0	$8,092,458 â–¼	-100.0%	0	0.0%	Multi-Sector Conglomerates
EMBRAER S.A.	$0	$7,462,414 â–¼	-100.0%	0	0.0%	SPONSORED ADS
ISHARES BITCOIN TRUST ETF	$0	$7,447,500 â–¼	-100.0%	0	0.0%	SHS BEN INT
ROKU Roku	$0	$6,617,890 â–¼	-100.0%	0	0.0%	Consumer Discretionary
RH RH	$0	$6,270,250 â–¼	-100.0%	0	0.0%	Consumer Staples
SN SharkNinja	$0	$5,885,940 â–¼	-100.0%	0	0.0%	Retail/Wholesale
MEDLINE INC	$0	$4,947,600 â–¼	-100.0%	0	0.0%	COM CL A
FND Floor & Decor	$0	$4,871,200 â–¼	-100.0%	0	0.0%	Retail/Wholesale
RIVN Rivian Automotive	$0	$4,769,820 â–¼	-100.0%	0	0.0%	Auto/Tires/Trucks
FIGURE TECHNOLOGY SOLUTIO	$0	$4,551,495 â–¼	-100.0%	0	0.0%	COM CL A
BBWI Bath & Body Works	$0	$4,518,000 â–¼	-100.0%	0	0.0%	Retail/Wholesale
EEM iShares MSCI Emerging Markets ETF	$0	$4,464,336 â–¼	-100.0%	0	0.0%	Finance
EOSE Eos Energy Enterprises	$0	$4,263,120 â–¼	-100.0%	0	0.0%	Industrials
ALNY Alnylam Pharmaceuticals	$0	$4,111,303 â–¼	-100.0%	0	0.0%	Medical
KINIKSA PHARMACEUTICALS	$0	$3,876,263 â–¼	-100.0%	0	0.0%	ORD SHS CL A
IONS Ionis Pharmaceuticals	$0	$3,756,776 â–¼	-100.0%	0	0.0%	Medical
ANF Abercrombie & Fitch	$0	$3,650,230 â–¼	-100.0%	0	0.0%	Retail/Wholesale
RAPT THERAPEUTICS INC	$0	$3,192,078 â–¼	-100.0%	0	0.0%	COM NEW
AAOI Applied Optoelectronics	$0	$3,055,722 â–¼	-100.0%	0	0.0%	Computer and Technology
RKT Rocket Companies	$0	$2,516,800 â–¼	-100.0%	0	0.0%	Finance
MRNA Moderna	$0	$2,241,240 â–¼	-100.0%	0	0.0%	Medical
U Unity Software	$0	$2,208,500 â–¼	-100.0%	0	0.0%	Computer and Technology
CECO CECO Environmental	$0	$1,783,769 â–¼	-100.0%	0	0.0%	Industrials
CIDARA THERAPEUTICS INC	$0	$1,082,361 â–¼	-100.0%	0	0.0%	COM NEW
REDDIT INC	$0	$459,740 â–¼	-100.0%	0	0.0%	CL A

Showing largest 100 holdings. View all holdings.

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Atika Capital Management LLC Top Holdings and 13F Report (2026)

About Atika Capital Management LLC

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools

About MarketBeat

MarketBeat Products

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Atika Capital Management LLC Top Holdings and 13F Report (2026)

About Atika Capital Management LLC

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Map of 500 Largest Holdings ofAtika Capital Management LLC

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

MarketBeat All Access Features

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools