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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
+24.59%
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
$1.24B
AUM Growth
+$242M
Cap. Flow
+$78.9M
Cap. Flow %
6.36%
Top 10 Hldgs %
41.79%
Holding
98
New
35
Increased
21
Reduced
21
Closed
12

Top Buys

Rank Stock Value
1
STX icon
Seagate
STX
+$20.2M
2
INSM icon
Insmed
INSM
+$11.6M
3
TSLA icon
Tesla
TSLA
+$10.8M
4
CDTX
Cidara Therapeutics
CDTX
+$10M
5
ROKU icon
Roku
ROKU
+$8.15M

Top Sells

Rank Stock Value
1
HOOD icon
Robinhood
HOOD
+$10.6M
2
SLNO
Soleno Therapeutics
SLNO
+$10.1M
3
GKOS icon
Glaukos
GKOS
+$9.83M
4
TW icon
Tradeweb Markets
TW
+$7.32M
5
WWD icon
Woodward
WWD
+$7.01M

Sector Composition

Rank Sector Weight
1 Technology 22.89%
2 Healthcare 17.33%
3 Industrials 15.64%
4 Consumer Discretionary 13.71%
5 Communication Services 12.08%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DASH icon
26
DoorDash
DASH
$93.7B
$17.2M 1.38%
63,201
-3,199
-5% -$802K
CDTX
27
DELISTED
Cidara Therapeutics
CDTX
$15.1M 1.21%
+157,320
New +$10M
INSP icon
28
Inspire Medical Systems
INSP
$1.74B
$13.9M 1.12%
187,600
+25,700
+16% +$2.6M
NVDA icon
29
NVIDIA
NVDA
$5.42T
$13.8M 1.11%
73,900
+15,100
+26% +$2.63M
TSLA icon
30
Tesla
TSLA
$1.3T
$13.8M 1.11%
+31,000
New +$10.8M
INSM icon
31
Insmed
INSM
$28.6B
$13.7M 1.1%
+95,000
New +$11.6M
ADBE icon
32
Adobe
ADBE
$105B
$13.7M 1.1%
38,698
+16,400
+74% +$5.88M
ROKU icon
33
Roku
ROKU
$22.7B
$13.3M 1.07%
133,000
+88,400
+198% +$8.15M
APPF icon
34
AppFolio
APPF
$7.04B
$12.3M 0.99%
44,500
– –
SHOP icon
35
Shopify
SHOP
$195B
$11.7M 0.94%
78,500
+9,100
+13% +$1.23M
CIEN icon
36
Ciena
CIEN
$58.4B
$11.7M 0.94%
+80,000
New +$8.15M
ALNY icon
37
Alnylam Pharmaceuticals
ALNY
$29.3B
$10.1M 0.82%
22,206
-5,494
-20% -$2.24M
GE icon
38
GE Aerospace
GE
$384B
$9.93M 0.8%
33,000
+1,559
+5% +$426K
KVUE icon
39
CALL
Kenvue
KVUE
$36.9B
$9.39M 0.76%
+5,785
New +$118K
EYE icon
40
National Vision
EYE
$1.81B
$8.79M 0.71%
301,000
-113,200
-27% -$2.78M
ASML icon
41
ASML
ASML
$669B
$8.46M 0.68%
+8,740
New +$6.87M
MTZ icon
42
MasTec
MTZ
$21.9B
$8.41M 0.68%
39,500
-9,700
-20% -$1.78M
GH icon
43
Guardant Health
GH
$22.6B
$8.31M 0.67%
133,000
+43,800
+49% +$2.38M
NTRA icon
44
Natera
NTRA
$46.4B
$7.48M 0.6%
46,497
– –
DHI icon
45
D.R. Horton
DHI
$42.3B
$7.46M 0.6%
+44,000
New +$6.92M
DUOL icon
46
Duolingo
DUOL
$6.12B
$7.14M 0.58%
22,200
+1,100
+5% +$368K
FIVE icon
47
Five Below
FIVE
$13.5B
$7.04M 0.57%
+45,500
New +$6.44M
MLYS icon
48
Mineralys Therapeutics
MLYS
$2.41B
$6.6M 0.53%
+174,000
New +$3.76M
FERG icon
49
Ferguson
FERG
$49.8B
$6.58M 0.53%
29,300
– –
AXSM icon
50
Axsome Therapeutics
AXSM
$10.9B
$5.95M 0.48%
49,000
+2,879
+6% +$324K
1
2
3 4

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Atika Capital Management's Q3 2025 Portfolio in Review

As of Q3 2025, Atika Capital Management held 98 positions worth $1.24B, up 24% from $1,000M the previous quarter. Its ten largest holdings account for 42% of the portfolio.

Atika Capital Management deployed $78.9M of net new capital in Q3 2025, opening 35 new positions and adding to 21 existing holdings. Its largest new stake was Seagate: 118,096 shares worth $27.9M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 18% a quarter earlier, followed by Healthcare and Industrials.

On the sell side, the largest reduction was Robinhood, an estimated $10.6M trimmed.

  • Atika Capital Management's largest Q3 2025 buy was Seagate: 118,096 shares worth $27.9M.
  • Atika Capital Management added most to Roku in Q3 2025, an estimated $8.15M increase.
  • Atika Capital Management's biggest Q3 2025 reduction was Robinhood, cutting an estimated $10.6M.
  • Atika Capital Management fully exited Soleno Therapeutics in Q3 2025, selling an estimated $10.1M.
  • Atika Capital Management's ten largest holdings make up 42% of its $1.24B portfolio in Q3 2025.
  • Atika Capital Management opened 35 new positions and closed 12 in Q3 2025.
  • Atika Capital Management's portfolio value rose 24% quarter-over-quarter to $1.24B.

Based on Atika Capital Management's 13F filing for Q3 2025, filed 13 Nov 2025.