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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
+27.6%
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
$950M
AUM Growth
-$292M
Cap. Flow
-$566M
Cap. Flow %
-59.62%
Top 10 Hldgs %
46.71%
Holding
121
New
35
Increased
14
Reduced
21
Closed
44

Top Buys

Rank Stock Value
1
MDGL icon
Madrigal Pharmaceuticals
MDGL
+$17.4M
2
COGT icon
Cogent Biosciences
COGT
+$14.2M
3
TEVA icon
Teva Pharmaceuticals
TEVA
+$12.1M
4
GOOG icon
Alphabet (Google) Class C
GOOG
+$12.1M
5
HEI icon
HEICO Corp
HEI
+$8.31M

Top Sells

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$85.5M
2
AMZN icon
Amazon
AMZN
+$72.5M
3
SPOT icon
Spotify
SPOT
+$43.9M
4
MLM icon
Martin Marietta Materials
MLM
+$43.2M
5
ANET icon
Arista Networks
ANET
+$33.7M

Sector Composition

Rank Sector Weight
1 Healthcare 26.3%
2 Industrials 20.32%
3 Consumer Discretionary 9.92%
4 Technology 9.36%
5 Communication Services 5.34%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CLH icon
76
Clean Harbors
CLH
$16.3B
$703K 0.07%
+3,000
New +$685K
RDDT icon
77
Reddit
RDDT
$31.1B
$460K 0.05%
+2,000
New +$421K
ADBE icon
78
Adobe
ADBE
$105B
– –
-38,698
Closed -$13.7M
AI icon
79
PUT
C3.ai
AI
$1.59B
– –
-2,103
Closed -$3.65M
ANET icon
80
Arista Networks
ANET
$238B
– –
-231,208
Closed -$33.7M
ASML icon
81
ASML
ASML
$669B
– –
-8,740
Closed -$8.46M
AVGO icon
82
Broadcom
AVGO
$2.04T
– –
-11,500
Closed -$3.79M
CALX icon
83
Calix
CALX
$2.39B
– –
-89,500
Closed -$5.49M
CDTX
84
DELISTED
Cidara Therapeutics
CDTX
– –
-157,320
Closed -$25.4M
CEG icon
85
Constellation Energy
CEG
$95.6B
– –
-94,800
Closed -$31.2M
CYBR
86
DELISTED
CyberArk
CYBR
– –
-44,855
Closed -$21.7M
DHI icon
87
D.R. Horton
DHI
$42.3B
– –
-44,000
Closed -$7.46M
DUOL icon
88
Duolingo
DUOL
$6.12B
– –
-22,200
Closed -$7.14M
EYE icon
89
National Vision
EYE
$1.81B
– –
-301,000
Closed -$8.79M
FND icon
90
Floor & Decor
FND
$6.68B
– –
-30,000
Closed -$1.94M
GKOS icon
91
Glaukos
GKOS
$10.6B
– –
-212,400
Closed -$17.3M
GNRC icon
92
Generac Holdings
GNRC
$12.5B
– –
-31,000
Closed -$5.19M
IBM icon
93
IBM
IBM
$224B
– –
-2,708
Closed -$764K
INFY icon
94
PUT
Infosys
INFY
$50.7B
– –
-1,000
Closed -$1.63M
INSP icon
95
Inspire Medical Systems
INSP
$1.74B
– –
-187,600
Closed -$13.9M
KMLM icon
96
CALL
KFA Mount Lucas Managed Futures Index Strategy ETF
KMLM
$405M
– –
-1,000
Closed -$4.2M
KVUE icon
97
CALL
Kenvue
KVUE
$36.9B
– –
-5,785
Closed -$9.39M
KYMR icon
98
Kymera Therapeutics
KYMR
$8.94B
– –
-81,300
Closed -$4.6M
META icon
99
Meta Platforms (Facebook)
META
$1.51T
– –
-35,500
Closed -$26.1M
MLM icon
100
Martin Marietta Materials
MLM
$33B
– –
-68,483
Closed -$43.2M
1 2 3
4
5

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LSA
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Atika Capital Management's Q4 2025 Portfolio in Review

As of Q4 2025, Atika Capital Management held 121 positions worth $950M, down 24% from $1.24B the previous quarter. Its ten largest holdings account for 47% of the portfolio.

Atika Capital Management withdrew a net $566M in Q4 2025, closing 44 positions and reducing 21 holdings. Its most notable exit was Microsoft, an estimated $85.5M position sold in full.

By sector, the portfolio is most concentrated in Healthcare at 26% of assets, up from 17% a quarter earlier, followed by Industrials and Consumer Discretionary.

Against the trend, Atika Capital Management opened a new position in Madrigal Pharmaceuticals worth $19.8M.

  • Atika Capital Management's largest Q4 2025 buy was Madrigal Pharmaceuticals: 34,000 shares worth $19.8M.
  • Atika Capital Management added most to Teva Pharmaceuticals in Q4 2025, an estimated $12.1M increase.
  • Atika Capital Management's biggest Q4 2025 reduction was Amazon, cutting an estimated $72.5M.
  • Atika Capital Management fully exited Microsoft in Q4 2025, selling an estimated $85.5M.
  • Atika Capital Management's ten largest holdings make up 47% of its $950M portfolio in Q4 2025.
  • Atika Capital Management opened 35 new positions and closed 44 in Q4 2025.
  • Atika Capital Management's portfolio value fell 24% quarter-over-quarter to $950M.

Based on Atika Capital Management's 13F filing for Q4 2025, filed 13 Feb 2026.