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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
VRT icon
1
Vertiv
VRT
$112B
$92.5M 7.45%
613,100
– –
AMZN icon
2
Amazon
AMZN
$2.5T
$87.2M 7.02%
397,049
-1,200
-0.3% -$272K
MSFT icon
3
Microsoft
MSFT
$2.84T
$85.5M 6.88%
165,000
+7,000
+4% +$3.57M
SPOT icon
4
Spotify
SPOT
$99.2B
$43.9M 3.53%
62,870
+350
+0.6% +$245K
MLM icon
5
Martin Marietta Materials
MLM
$33.6B
$43.2M 3.48%
68,483
-4,050
-6% -$2.41M
BWXT icon
6
BWX Technologies
BWXT
$16B
$40.1M 3.23%
217,400
+7,000
+3% +$1.13M
ANET icon
7
Arista Networks
ANET
$219B
$33.7M 2.71%
231,208
-30,400
-12% -$3.91M
LLY icon
8
Eli Lilly
LLY
$1.07T
$31.4M 2.53%
41,100
– –
CEG icon
9
Constellation Energy
CEG
$98B
$31.2M 2.51%
94,800
– –
ECHO
10
CALL
EchoStar
ECHO
$25.5B
$30.4M 2.45%
3,983
-387
-9% -$17.5K
TLN
11
Talen Energy Corp
TLN
$17.2B
$29.5M 2.37%
69,300
+9,500
+16% +$3.43M
STX icon
12
Seagate
STX
$193B
$27.9M 2.25%
+118,096
New +$20.2M
GEV icon
13
GE Vernova
GEV
$270B
$26.1M 2.1%
42,439
-111
-0.3% -$67.2K
META icon
14
Meta Platforms (Facebook)
META
$1.51T
$26.1M 2.1%
35,500
-2,500
-7% -$1.86M
ISRG icon
15
Intuitive Surgical
ISRG
$121B
$25.6M 2.06%
57,236
-2,364
-4% -$1.13M
VST icon
16
Vistra
VST
$55.1B
$24.1M 1.94%
123,000
-1,000
-0.8% -$198K
CYBR
17
DELISTED
CyberArk
CYBR
$21.7M 1.75%
44,855
+6,000
+15% +$2.58M
NFLX icon
18
Netflix
NFLX
$292B
$21.6M 1.74%
180,000
+60,000
+50% +$7.32M
NET icon
19
Cloudflare
NET
$93B
$21M 1.69%
98,010
+29,209
+42% +$5.96M
NBIS
20
Nebius Group N.V.
NBIS
$47.7B
$20.2M 1.63%
179,880
+110,380
+159% +$7.66M
RBLX icon
21
Roblox
RBLX
$34B
$19.7M 1.59%
142,500
+33,500
+31% +$4.16M
VRNA
22
DELISTED
Verona Pharma
VRNA
$18.8M 1.51%
176,000
-36,500
-17% -$3.81M
MELI icon
23
Mercado Libre
MELI
$91.3B
$18.5M 1.49%
7,930
-2,070
-21% -$4.97M
HOOD icon
24
Robinhood
HOOD
$85.2B
$17.3M 1.4%
121,000
-97,100
-45% -$10.6M
GKOS icon
25
Glaukos
GKOS
$9.02B
$17.3M 1.39%
212,400
-107,100
-34% -$9.83M
1
2 3 4

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ATS
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RIM
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ACM
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CAM
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Legacy Financial Group (Iowa)
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LSA
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GWA
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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.