Atika Capital Management LLC

CIK

1599731

Location

NEW YORK, NY

Portfolio Value

Micro $3,367,859

Diversification

Diversified

Filing Date

Global Rank

#2,346 / 8,586 ▼ 113

Top Industry

Electrical Equipment & Parts 27.3%

3Y Alpha vs SPY

-7.3%

Period ended 3 months ago

Filed May 14, 2026 · 33d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+48.9%

SPY

+78.1%

Annualised alpha

-7.0%

Max drawdown

−27.1%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

50 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

27.3%

+12.6 pts

Top 5

44.7%

+13.1 pts

Top 10

58.7%

+14.0 pts

HHI

917

Diversified+515

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Industrials	41.2%	$251,874,313	11
Healthcare	30.5%	$186,925,341	20
Technology	14.2%	$86,996,811	9
Communication Services	7.3%	$44,679,001	3
Consumer Cyclical	4.9%	$30,015,243	4
Utilities	1.0%	$5,902,561	1
Consumer Defensive	0.6%	$3,367,859	1
Financial Services	0.4%	$2,312,662	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

11 positions

Ticker	Company	Δ Shares	Shares	Value
DBVT	DBV Technologies S.A.	+64,419	271,300	$5,667,456
SATS	EchoStar CORP	+54,794	183,583	$21,492,058
VRT	Vertiv Holdings Co	+30,000	666,100	$166,911,337
RKLB	Rocket Lab Corp	+23,885	86,000	$5,522,918
CLH	Clean Harbors Inc	+18,855	21,855	$6,266,482
NET	Cloudflare, Inc.	+10,100	65,000	$13,412,099
CW	Curtiss Wright Corp	+3,118	13,000	$8,854,559
APPF	Appfolio Inc	+3,000	47,500	$7,496,448
NFLX	Netflix Inc	+1,650	181,650	$17,465,645
MTZ	Mastec Inc	+1,638	57,636	$18,543,806
STX	Seagate Technology Holdings plc	+1,593	53,500	$20,959,159
No positions match the current search.

Trimmed

Positions the filer reduced

23 positions

Ticker	Company	Δ Shares	Shares	Value
TEVA	Teva Pharmaceutical Industries Ltd	−243,000	477,000	$14,367,239
COGT	Cogent Biosciences, Inc.	−212,800	293,200	$11,285,267
QXO	QXO, Inc.	−155,747	264,253	$5,131,792
WRBY	Warby Parker Inc.	−113,971	135,000	$2,844,448
REAL	TheRealReal, Inc.	−113,945	451,055	$4,095,578
IMNM	Immunome Inc.	−71,441	262,900	$5,749,622
TBBB	Bbb Foods Inc	−47,064	95,218	$3,367,859
AMZN	Amazon Com Inc	−36,300	43,700	$9,101,397
XENE	Xenon Pharmaceuticals Inc.	−32,606	59,900	$3,483,183
BWXT	BWX Technologies, Inc.	−26,350	82,550	$16,880,648
ABVX	Abivax S.A.	−26,200	28,800	$3,206,878
PTGX	Protagonist Therapeutics, Inc	−23,900	62,100	$6,545,339
TLN	Talen Energy Corp	−23,610	18,490	$5,902,561
TERN	Terns Pharmaceuticals, Inc.	−20,445	300,720	$15,853,957
GH	Guardant Health, Inc.	−17,000	91,000	$8,405,669
FIVE	Five Below, Inc	−16,720	39,480	$9,020,390
CIEN	Ciena Corp	−16,349	43,651	$16,946,626
GE	General Electric Co	−10,438	15,510	$4,401,271
TTMI	Ttm Technologies Inc	−8,473	93,000	$9,060,058
HEI	Heico Corp	−7,035	19,265	$5,282,461
DNTH	Dianthus Therapeutics, Inc. /DE/	−5,728	128,800	$10,808,895
ASND	Ascendis Pharma A/S	−1,517	19,125	$4,374,460
MELI	Mercadolibre Inc	−1,437	4,510	$7,797,878
No positions match the current search.

New Positions

Positions the filer opened this quarter

13 positions

Ticker	Company	Shares	Value
ORKA	Oruka Therapeutics, Inc.	229,900	$11,276,594
WDC	Western Digital Corp	37,717	$10,202,069
UTHR	UNITED THERAPEUTICS Corp	12,350	$7,323,301
KRMN	Karman Holdings Inc.	90,500	$7,244,523
META	Meta Platforms, Inc.	10,000	$5,721,298
SITM	SITIME Corp	14,805	$5,112,905
LASR	Nlight, Inc.	66,000	$3,763,318
MAZE	Maze Therapeutics, Inc.	111,500	$3,328,273
ACHC	Acadia Healthcare Company, Inc.	122,600	$2,867,613
KRYS	Krystal Biotech, Inc.	10,625	$2,744,648
BBIO	BridgeBio Pharma, Inc.	35,200	$2,613,951
HUT	Hut 8 Corp.	49,300	$2,312,662
INTC	Intel Corp	1,000	$44,129
No positions match the current search.

Sold Out

Positions the filer fully exited

25 positions

Ticker	Company	Shares	Value
SHOP	Shopify Inc.	124,000	$19,960,278
MDGL	Madrigal Pharmaceuticals, Inc.	34,000	$19,799,559
TSLA	Tesla, Inc.	30,000	$13,491,599
INSM	INSMED Inc	77,200	$13,435,886
DASH	DoorDash, Inc.	46,000	$10,418,078
AXSM	Axsome Therapeutics, Inc.	55,500	$10,136,519
MDB	MongoDB, Inc.	22,326	$9,369,997
LMND	Lemonade, Inc.	113,917	$8,108,611
CSL	Carlisle Companies Inc	25,300	$8,092,456
EMBJ	Embraer S.A.	115,930	$7,462,413
ROKU	Roku, Inc	61,000	$6,617,889
RH	Rh	35,000	$6,270,249
HOOD	Robinhood Markets, Inc.	52,200	$5,903,817
SN	SharkNinja, Inc.	52,600	$5,885,938
MDLN	Medline Inc.	117,800	$4,947,600
FIGR	Figure Technology Solutions, Inc.	111,447	$4,551,494
BBWI	Bath & Body Works, Inc.	225,000	$4,517,998
ALNY	Alnylam Pharmaceuticals, Inc.	10,339	$4,111,302
KNSA	Kiniksa Pharmaceuticals International, plc	93,970	$3,876,261
IONS	Ionis Pharmaceuticals Inc	47,488	$3,756,774
ANF	Abercrombie & Fitch Co /De/	29,000	$3,650,229
AAOI	Applied Optoelectronics, Inc.	87,657	$3,055,722
RKT	Rocket Companies, Inc.	130,000	$2,516,798
CECO	Ceco Environmental Corp	29,804	$1,783,768
RDDT	Reddit, Inc.	2,000	$459,738
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

1 positions · $3,367,859 total · Consumer Defensive only · as of Mar 31, 2026

All sectors Communication Services Consumer Cyclical Consumer Defensive Financial Services Healthcare Industrials Technology Utilities

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio	History
TBBB	Bbb Foods Inc Consumer Defensive	Reduced	95,218	-47,064	$3,367,859	−29.1%	100.00%