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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
KNSA icon
76
Kiniksa Pharmaceuticals
KNSA
$6.08B
$1.47M 0.1%
+23,000
New +$1.19M
CLF icon
77
CALL
Cleveland-Cliffs
CLF
$7.13B
$1.41M 0.09%
+1,500
New +$16.5K
SG icon
78
Sweetgreen
SG
$814M
$1.06M 0.07%
+120,000
New +$916K
KEEL
79
CALL
Keel Infrastructure Corp
KEEL
$2.14B
$861K 0.06%
+1,500
New +$6.44K
SNDK
80
Sandisk
SNDK
$255B
$689K 0.05%
+303
New +$433K
STUB
81
StubHub Holdings
STUB
$2.52B
$644K 0.04%
+50,000
New +$441K
ACHC icon
82
Acadia Healthcare
ACHC
$2.62B
– –
-122,600
Closed -$2.87M
BBIO icon
83
BridgeBio Pharma
BBIO
$14.6B
– –
-35,200
Closed -$2.61M
CLH icon
84
Clean Harbors
CLH
$16.7B
– –
-21,855
Closed -$6.27M
DBVT
85
DBV Technologies
DBVT
$847M
– –
-271,300
Closed -$5.67M
GDX icon
86
CALL
VanEck Gold Miners ETF
GDX
$30.7B
– –
-1,500
Closed -$13.8M
GDX icon
87
VanEck Gold Miners ETF
GDX
$30.7B
– –
-80,000
Closed -$7.34M
GE icon
88
GE Aerospace
GE
$350B
– –
-15,510
Closed -$4.4M
GOOG icon
89
Alphabet (Google) Class C
GOOG
$4.1T
– –
-43,250
Closed -$12.4M
HEI icon
90
HEICO Corp
HEI
$45.5B
– –
-19,265
Closed -$5.28M
HEI.A icon
91
HEICO Corp Class A
HEI.A
$33.6B
– –
-10,575
Closed -$2.23M
INTC icon
92
CALL
Intel
INTC
$506B
– –
-1,000
Closed -$4.41M
IWM icon
93
PUT
iShares Russell 2000 ETF
IWM
$81.2B
– –
-1,000
Closed -$24.8M
META icon
94
Meta Platforms (Facebook)
META
$1.57T
– –
-10,000
Closed -$5.72M
NET icon
95
Cloudflare
NET
$99.3B
– –
-65,000
Closed -$13.4M
NFLX icon
96
CALL
Netflix
NFLX
$326B
– –
-1,650
Closed -$15.9M
TERN
97
CALL
DELISTED
Terns Pharmaceuticals
TERN
– –
-720
Closed -$3.8M
TERN
98
DELISTED
Terns Pharmaceuticals
TERN
– –
-300,000
Closed -$15.8M
UTHR icon
99
United Therapeutics
UTHR
$20.9B
– –
-12,350
Closed -$7.32M
XENE icon
100
Xenon Pharmaceuticals
XENE
$5.79B
– –
-59,900
Closed -$3.48M
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.