Atika Capital Management LLC

CIK

1599731

Location

NEW YORK, NY

Portfolio Value

Small $612,073,791

Diversification

Diversified

Filing Date

Global Rank

#2,058 / 8,232 ▼ 21

Top Industry

Electrical Equipment & Parts 27.3%

3Y Alpha vs SPY

-6.9%

Period ended 2 months ago

Filed May 14, 2026 · 31d

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

+47.7%

SPY

+76.3%

Annualised alpha

-6.9%

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

50 positions · $612,073,791 total · 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
VRT	Vertiv Holdings Co Industrials	Added	666,100	+30,000	$166,911,337	+62.0%	27.27%
LLY	ELI LILLY & Co Healthcare	Held	41,100	0	$37,802,545	−14.4%	6.18%
ISRG	Intuitive Surgical Inc Healthcare	Held	57,216	0	$26,376,003	−18.6%	4.31%
SATS	EchoStar CORP Communication Services	Added	183,583	+54,794	$21,492,058	+53.5%	3.51%
STX	Seagate Technology Holdings plc Technology	Added	53,500	+1,593	$20,959,159	+46.6%	3.42%
MTZ	Mastec Inc Industrials	Added	57,636	+1,638	$18,543,806	+52.3%	3.03%
NFLX	Netflix Inc Communication Services	Added	181,650	+1,650	$17,465,645	+3.5%	2.85%
CIEN	Ciena Corp Technology	Reduced	43,651	-16,349	$16,946,626	+20.8%	2.77%
BWXT	BWX Technologies, Inc. Industrials	Reduced	82,550	-26,350	$16,880,648	−10.3%	2.76%
TERN	Terns Pharmaceuticals, Inc. Healthcare	Reduced	300,720	-20,445	$15,853,957	+22.2%	2.59%
TEVA	Teva Pharmaceutical Industries Ltd Healthcare	Reduced	477,000	-243,000	$14,367,239	−36.1%	2.35%
NET	Cloudflare, Inc. Technology	Added	65,000	+10,100	$13,412,099	+23.9%	2.19%
COGT	Cogent Biosciences, Inc. Healthcare	Reduced	293,200	-212,800	$11,285,267	−37.2%	1.84%
ORKA	Oruka Therapeutics, Inc. Healthcare	NEW	229,900	NEW	$11,276,594	NEW	1.84%
DNTH	Dianthus Therapeutics, Inc. /DE/ Healthcare	Reduced	128,800	-5,728	$10,808,895	+95.0%	1.77%
WDC	Western Digital Corp Technology	NEW	37,717	NEW	$10,202,069	NEW	1.67%
AMZN	Amazon Com Inc Consumer Cyclical	Reduced	43,700	-36,300	$9,101,397	−50.7%	1.49%
TTMI	Ttm Technologies Inc Technology	Reduced	93,000	-8,473	$9,060,058	+29.4%	1.48%
FIVE	Five Below, Inc Consumer Cyclical	Reduced	39,480	-16,720	$9,020,390	−14.8%	1.47%
CW	Curtiss Wright Corp Industrials	Added	13,000	+3,118	$8,854,559	+62.5%	1.45%
GH	Guardant Health, Inc. Healthcare	Reduced	91,000	-17,000	$8,405,669	−23.8%	1.37%
MELI	Mercadolibre Inc Consumer Cyclical	Reduced	4,510	-1,437	$7,797,878	−34.9%	1.27%
APPF	Appfolio Inc Technology	Added	47,500	+3,000	$7,496,448	−27.6%	1.22%
UTHR	UNITED THERAPEUTICS Corp Healthcare	NEW	12,350	NEW	$7,323,301	NEW	1.20%
KRMN	Karman Holdings Inc. Industrials	NEW	90,500	NEW	$7,244,523	NEW	1.18%
FERG	Ferguson Enterprises Inc. /DE/ Industrials	Held	29,300	0	$6,834,516	+4.8%	1.12%
PTGX	Protagonist Therapeutics, Inc Healthcare	Reduced	62,100	-23,900	$6,545,339	−12.9%	1.07%
CLH	Clean Harbors Inc Industrials	Added	21,855	+18,855	$6,266,482	+790.8%	1.02%
TLN	Talen Energy Corp Utilities	Reduced	18,490	-23,610	$5,902,561	−62.6%	0.96%
IMNM	Immunome Inc. Healthcare	Reduced	262,900	-71,441	$5,749,622	−19.9%	0.94%
META	Meta Platforms, Inc. Communication Services	NEW	10,000	NEW	$5,721,298	NEW	0.93%
DBVT	DBV Technologies S.A. Healthcare	Added	271,300	+64,419	$5,667,456	+42.9%	0.93%
RKLB	Rocket Lab Corp Industrials	Added	86,000	+23,885	$5,522,918	+27.5%	0.90%
HEI	Heico Corp Industrials	Reduced	19,265	-7,035	$5,282,461	−37.9%	0.86%
QXO	QXO, Inc. Industrials	Reduced	264,253	-155,747	$5,131,792	−36.7%	0.84%
SITM	SITIME Corp Technology	NEW	14,805	NEW	$5,112,905	NEW	0.84%
GE	General Electric Co Industrials	Reduced	15,510	-10,438	$4,401,271	−44.9%	0.72%
ASND	Ascendis Pharma A/S Healthcare	Reduced	19,125	-1,517	$4,374,460	−0.6%	0.71%
REAL	TheRealReal, Inc. Consumer Cyclical	Reduced	451,055	-113,945	$4,095,578	−54.1%	0.67%
LASR	Nlight, Inc. Technology	NEW	66,000	NEW	$3,763,318	NEW	0.61%
XENE	Xenon Pharmaceuticals Inc. Healthcare	Reduced	59,900	-32,606	$3,483,183	−16.0%	0.57%
TBBB	Bbb Foods Inc Consumer Defensive	Reduced	95,218	-47,064	$3,367,859	−29.1%	0.55%
MAZE	Maze Therapeutics, Inc. Healthcare	NEW	111,500	NEW	$3,328,273	NEW	0.54%
ABVX	Abivax S.A. Healthcare	Reduced	28,800	-26,200	$3,206,878	−56.8%	0.52%
ACHC	Acadia Healthcare Company, Inc. Healthcare	NEW	122,600	NEW	$2,867,613	NEW	0.47%
WRBY	Warby Parker Inc. Healthcare	Reduced	135,000	-113,971	$2,844,448	−47.6%	0.46%
KRYS	Krystal Biotech, Inc. Healthcare	NEW	10,625	NEW	$2,744,648	NEW	0.45%
BBIO	BridgeBio Pharma, Inc. Healthcare	NEW	35,200	NEW	$2,613,951	NEW	0.43%
HUT	Hut 8 Corp. Financial Services	NEW	49,300	NEW	$2,312,662	NEW	0.38%
INTC	Intel Corp Technology	NEW	1,000	NEW	$44,129	NEW	0.01%