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ACM

Atika Capital Management Portfolio holdings

AUM $1.52B
1-Year Est. Return 229.41%
This Fund
S&P 500
This Quarter Est. Return
+67.26%
1 Year Est. Return
+229.41%
3 Year Est. Return
+810.62%
5 Year Est. Return
+1,830.01%
10 Year Est. Return
+67,312.86%
AUM
$1.52B
AUM Growth
+$725M
Cap. Flow
+$143M
Cap. Flow %
9.43%
Top 10 Hldgs %
50.26%
Holding
104
New
44
Increased
15
Reduced
13
Closed
23

Top Buys

Rank Stock Value
1
AMD icon
Advanced Micro Devices
AMD
+$39.2M
2
INTC icon
Intel
INTC
+$26.7M
3
STX icon
Seagate
STX
+$20.1M
4
ECHO
EchoStar
ECHO
+$18.3M
5
AXSM icon
Axsome Therapeutics
AXSM
+$13.7M

Top Sells

Rank Stock Value
1
TERN
Terns Pharmaceuticals
TERN
+$15.8M
2
NET icon
Cloudflare
NET
+$13.4M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$12.4M
4
ORKA
Oruka Therapeutics
ORKA
+$8.66M
5
MTZ icon
MasTec
MTZ
+$8.46M

Sector Composition

Rank Sector Weight
1 Miscellaneous 33.76%
2 Technology 20.12%
3 Healthcare 19.16%
4 Industrials 18.7%
5 Communication Services 3.59%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
VRT icon
1
Vertiv
VRT
$106B
$223M 14.66%
666,100
– –
XBI icon
2
PUT
State Street SPDR S&P Biotech ETF
XBI
$11.7B
$89M 5.85%
5,625
+1,400
+33% +$189K
STX icon
3
Seagate
STX
$189B
$77.1M 5.07%
79,865
+26,365
+49% +$20.1M
QQQ icon
4
PUT
Invesco QQQ Trust
QQQ
$488B
$73.6M 4.84%
+1,000
New +$688K
GEV icon
5
PUT
GE Vernova
GEV
$253B
$58.7M 3.86%
+500
New +$510K
AMD icon
6
Advanced Micro Devices
AMD
$765B
$55.5M 3.65%
+95,500
New +$39.2M
AMZN icon
7
CALL
Amazon
AMZN
$2.77T
$52.9M 3.48%
+2,220
New +$557K
LLY icon
8
Eli Lilly
LLY
$1.02T
$49.3M 3.24%
41,100
– –
QQQ icon
9
CALL
Invesco QQQ Trust
QQQ
$488B
$48.6M 3.19%
+660
New +$454K
INTC icon
10
Intel
INTC
$498B
$36.9M 2.42%
+264,000
New +$26.7M
MU icon
11
PUT
Micron Technology
MU
$1.12T
$34.6M 2.28%
+300
New +$225K
ECHO
12
EchoStar
ECHO
$25.8B
$33.6M 2.21%
331,400
+149,400
+82% +$18.3M
SMH icon
13
PUT
VanEck Semiconductor ETF
SMH
$69.3B
$33.5M 2.2%
510
-210
-29% -$115K
GH icon
14
Guardant Health
GH
$21B
$27.2M 1.78%
181,000
+90,000
+99% +$9.79M
IGV icon
15
PUT
iShares Expanded Tech-Software Sector ETF
IGV
$14.1B
$24.6M 1.62%
+2,720
New +$242K
CIEN icon
16
Ciena
CIEN
$45.3B
$23.9M 1.57%
48,768
+5,117
+12% +$2.61M
ISRG icon
17
Intuitive Surgical
ISRG
$129B
$22.8M 1.5%
57,216
– –
BTI icon
18
CALL
British American Tobacco
BTI
$120B
$20.4M 1.34%
+3,300
New +$199K
IBIT icon
19
PUT
iShares Bitcoin Trust
IBIT
$61.2B
$20M 1.31%
+6,000
New +$244K
VPG icon
20
Vishay Precision Group
VPG
$839M
$17.7M 1.16%
+118,000
New +$11M
MRVL icon
21
Marvell Technology
MRVL
$195B
$17.3M 1.14%
+58,000
New +$11.6M
RKLB icon
22
Rocket Lab Corp
RKLB
$40.7B
$17.2M 1.13%
169,000
+83,000
+97% +$8.27M
WDC icon
23
Western Digital
WDC
$165B
$16.9M 1.11%
26,477
-11,240
-30% -$5.47M
RVMD icon
24
Revolution Medicines
RVMD
$44.7B
$16.5M 1.08%
+88,000
New +$12.9M
ASND icon
25
Ascendis Pharma A/S
ASND
$17.5B
$16.3M 1.07%
61,000
+41,875
+219% +$9.78M
1
2 3 4 5

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Atika Capital Management's Q2 2026 Portfolio in Review

As of Q2 2026, Atika Capital Management held 104 positions worth $1.52B, up 91% from $796M the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Atika Capital Management deployed $143M of net new capital in Q2 2026, opening 44 new positions and adding to 15 existing holdings. Its largest new stake was Advanced Micro Devices: 95,500 shares worth $55.5M.

By sector, the portfolio is most concentrated in Miscellaneous at 34% of assets, up from 21% a quarter earlier, followed by Technology and Healthcare.

On the sell side, the largest reduction was Oruka Therapeutics, an estimated $8.66M trimmed.

  • Atika Capital Management's largest Q2 2026 buy was Advanced Micro Devices: 95,500 shares worth $55.5M.
  • Atika Capital Management added most to Seagate in Q2 2026, an estimated $20.1M increase.
  • Atika Capital Management's biggest Q2 2026 reduction was Oruka Therapeutics, cutting an estimated $8.66M.
  • Atika Capital Management fully exited Terns Pharmaceuticals in Q2 2026, selling an estimated $15.8M.
  • Atika Capital Management's ten largest holdings make up 50% of its $1.52B portfolio in Q2 2026.
  • Atika Capital Management opened 44 new positions and closed 23 in Q2 2026.
  • Atika Capital Management's portfolio value rose 91% quarter-over-quarter to $1.52B.

Based on Atika Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.