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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
FIVE icon
26
Five Below
FIVE
$13.5B
$10.6M 1.11%
56,200
+10,700
+24% +$1.74M
DASH icon
27
DoorDash
DASH
$93.7B
$10.4M 1.1%
46,000
-17,201
-27% -$4.03M
APPF icon
28
AppFolio
APPF
$7.04B
$10.4M 1.09%
44,500
– –
AXSM icon
29
Axsome Therapeutics
AXSM
$10.9B
$10.1M 1.07%
55,500
+6,500
+13% +$907K
MDB icon
30
MongoDB
MDB
$32.1B
$9.37M 0.99%
+22,326
New +$8.12M
TEVA icon
31
CALL
Teva Pharmaceuticals
TEVA
$41.2B
$9.36M 0.99%
+3,000
New +$73.9K
REAL icon
32
The RealReal
REAL
$1.48B
$8.92M 0.94%
565,000
+191,000
+51% +$2.49M
HEI icon
33
HEICO Corp
HEI
$51.4B
$8.51M 0.9%
+26,300
New +$8.31M
LMND icon
34
Lemonade
LMND
$4.1B
$8.11M 0.85%
113,917
+44,917
+65% +$3.02M
QXO
35
QXO Inc
QXO
$17.4B
$8.1M 0.85%
+420,000
New +$8.05M
CSL icon
36
Carlisle Companies
CSL
$15.4B
$8.09M 0.85%
+25,300
New +$8.2M
GE icon
37
GE Aerospace
GE
$384B
$7.99M 0.84%
25,948
-7,052
-21% -$2.12M
HOOD icon
38
PUT
Robinhood
HOOD
$83.9B
$7.92M 0.83%
+700
New +$91K
PTGX icon
39
Protagonist Therapeutics
PTGX
$9.44B
$7.51M 0.79%
86,000
+3,000
+4% +$246K
EMBJ
40
Embraer S.A. ADS
EMBJ
$13B
$7.46M 0.79%
+115,930
New +$7.27M
IBIT icon
41
PUT
iShares Bitcoin Trust
IBIT
$47.8B
$7.45M 0.78%
+1,500
New +$85.2K
ABVX
42
Abivax
ABVX
$11.4B
$7.42M 0.78%
55,000
-14,000
-20% -$1.53M
IMNM icon
43
Immunome
IMNM
$2.83B
$7.18M 0.76%
+334,341
New +$5.87M
TTMI icon
44
TTM Technologies
TTMI
$14.5B
$7M 0.74%
+101,473
New +$6.62M
ROKU icon
45
Roku
ROKU
$22.7B
$6.62M 0.7%
61,000
-72,000
-54% -$7.31M
FERG icon
46
Ferguson
FERG
$49.8B
$6.52M 0.69%
29,300
– –
RH icon
47
RH
RH
$3.71B
$6.27M 0.66%
+35,000
New +$5.99M
SN icon
48
SharkNinja
SN
$26.1B
$5.89M 0.62%
52,600
+12,600
+32% +$1.24M
HOOD icon
49
Robinhood
HOOD
$83.9B
$5.82M 0.61%
51,500
-69,500
-57% -$9.04M
DNTH icon
50
Dianthus Therapeutics
DNTH
$6.09B
$5.54M 0.58%
+134,528
New +$5.22M
1
2
3 4 5

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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.