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ACM

Atika Capital Management Portfolio holdings

AUM $796M
1-Year Est. Return 167.57%
This Fund
S&P 500
This Quarter Est. Return
+23.88%
1 Year Est. Return
+167.57%
3 Year Est. Return
+553.47%
5 Year Est. Return
+1,283.26%
10 Year Est. Return
+44,203.78%
AUM
$796M
AUM Growth
-$153M
Cap. Flow
-$209M
Cap. Flow %
-26.22%
Top 10 Hldgs %
52.34%
Holding
96
New
19
Increased
12
Reduced
25
Closed
36

Top Buys

Rank Stock Value
1
WDC icon
Western Digital
WDC
+$9.85M
2
KRMN
Karman Holdings
KRMN
+$8.73M
3
ORKA
Oruka Therapeutics
ORKA
+$7.99M
4
GDX icon
VanEck Gold Miners ETF
GDX
+$7.88M
5
VRT icon
Vertiv
VRT
+$6.66M

Top Sells

Rank Stock Value
1
SHOP icon
Shopify
SHOP
+$20M
2
MDGL icon
Madrigal Pharmaceuticals
MDGL
+$19.8M
3
TSLA icon
Tesla
TSLA
+$13.5M
4
INSM icon
Insmed
INSM
+$13.4M
5
DASH icon
DoorDash
DASH
+$10.4M

Sector Composition

Rank Sector Weight
1 Industrials 31.91%
2 Healthcare 23.47%
3 Technology 10.92%
4 Communication Services 7.13%
5 Consumer Discretionary 3.77%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FIVE icon
26
Five Below
FIVE
$11.2B
$9.02M 1.13%
39,480
-16,720
-30% -$3.5M
CW icon
27
Curtiss-Wright
CW
$26.1B
$8.85M 1.11%
13,000
+3,118
+32% +$2.07M
GH icon
28
Guardant Health
GH
$20.7B
$8.41M 1.06%
91,000
-17,000
-16% -$1.71M
MELI icon
29
Mercado Libre
MELI
$92B
$7.8M 0.98%
4,510
-1,437
-24% -$2.77M
APPF icon
30
AppFolio
APPF
$6.35B
$7.5M 0.94%
47,500
+3,000
+7% +$568K
GDX icon
31
VanEck Gold Miners ETF
GDX
$21.8B
$7.34M 0.92%
+80,000
New +$7.88M
UTHR icon
32
United Therapeutics
UTHR
$22.7B
$7.32M 0.92%
+12,350
New +$6.15M
KRMN
33
Karman Holdings
KRMN
$6.12B
$7.24M 0.91%
+90,500
New +$8.73M
FERG icon
34
Ferguson
FERG
$45B
$6.83M 0.86%
29,300
– –
PTGX icon
35
Protagonist Therapeutics
PTGX
$9.06B
$6.55M 0.82%
62,100
-23,900
-28% -$2.12M
CLH icon
36
Clean Harbors
CLH
$16.4B
$6.27M 0.79%
21,855
+18,855
+629% +$5.15M
TLN
37
Talen Energy Corp
TLN
$17.8B
$5.9M 0.74%
18,490
-23,610
-56% -$8.33M
IMNM icon
38
Immunome
IMNM
$2.53B
$5.75M 0.72%
262,900
-71,441
-21% -$1.59M
META icon
39
Meta Platforms (Facebook)
META
$1.64T
$5.72M 0.72%
+10,000
New +$6.41M
DBVT
40
DBV Technologies
DBVT
$870M
$5.67M 0.71%
271,300
+64,419
+31% +$1.35M
RKLB icon
41
Rocket Lab Corp
RKLB
$42.3B
$5.52M 0.69%
86,000
+23,885
+38% +$1.8M
HEI icon
42
HEICO Corp
HEI
$47.9B
$5.28M 0.66%
19,265
-7,035
-27% -$2.26M
QXO
43
QXO Inc
QXO
$14.9B
$5.13M 0.64%
264,253
-155,747
-37% -$3.56M
SITM icon
44
SiTime
SITM
$16.6B
$5.11M 0.64%
+14,805
New +$5.45M
INTC icon
45
CALL
Intel
INTC
$478B
$4.41M 0.55%
+1,000
New +$45.8K
GE icon
46
GE Aerospace
GE
$364B
$4.4M 0.55%
15,510
-10,438
-40% -$3.28M
ASND icon
47
Ascendis Pharma A/S
ASND
$17.1B
$4.37M 0.55%
19,125
-1,517
-7% -$340K
REAL icon
48
The RealReal
REAL
$1.35B
$4.1M 0.51%
451,055
-113,945
-20% -$1.44M
TERN
49
CALL
DELISTED
Terns Pharmaceuticals
TERN
$3.8M 0.48%
+720
New +$29.6K
LASR icon
50
nLIGHT
LASR
$3.91B
$3.76M 0.47%
+66,000
New +$3.58M
1
2
3 4

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Arkos Global Advisors Houston, Texas $797M AUM 15.28% 1-Year Est. Return
ATS
Ashton Thomas Securities Rochester, New York $797M AUM 18.33% 1-Year Est. Return
BIM
Barton Investment Management West Conshohocken, Pennsylvania $797M AUM 11.92% 1-Year Est. Return
RIM
Rovida Investment Management Grand Cayman, Cayman Islands $797M AUM 111.83% 1-Year Est. Return
ACM
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CAM
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Legacy Financial Group (Iowa)
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LSA
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Atika Capital Management's Q1 2026 Portfolio in Review

As of Q1 2026, Atika Capital Management held 96 positions worth $796M, down 16% from $950M the previous quarter. Its ten largest holdings account for 52% of the portfolio.

Atika Capital Management withdrew a net $209M in Q1 2026, closing 36 positions and reducing 25 holdings. Its most notable exit was Shopify, an estimated $20M position sold in full.

By sector, the portfolio is most concentrated in Industrials at 32% of assets, up from 20% a quarter earlier, followed by Healthcare and Technology.

Against the trend, Atika Capital Management opened a new position in Western Digital worth $10.2M.

  • Atika Capital Management's largest Q1 2026 buy was Western Digital: 37,717 shares worth $10.2M.
  • Atika Capital Management added most to Vertiv in Q1 2026, an estimated $6.66M increase.
  • Atika Capital Management's biggest Q1 2026 reduction was Talen Energy Corp, cutting an estimated $8.33M.
  • Atika Capital Management fully exited Shopify in Q1 2026, selling an estimated $20M.
  • Atika Capital Management's ten largest holdings make up 52% of its $796M portfolio in Q1 2026.
  • Atika Capital Management opened 19 new positions and closed 36 in Q1 2026.
  • Atika Capital Management's portfolio value fell 16% quarter-over-quarter to $796M.

Based on Atika Capital Management's 13F filing for Q1 2026, filed 14 May 2026.