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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
+23.88%
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
$796M
AUM Growth
-$153M
(-16%)
Cap. Flow
-$209M
Cap. Flow
% of AUM
-26.22%
Top 10 Holdings %
Top 10 Hldgs %
52.34%
Holding
96
New
19
Increased
12
Reduced
25
Closed
36
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Western Digital
WDC
|
+$9.85M |
| 2 |
KRMN
Karman Holdings
KRMN
|
+$8.73M |
| 3 |
ORKA
Oruka Therapeutics
ORKA
|
+$7.99M |
| 4 |
VanEck Gold Miners ETF
GDX
|
+$7.88M |
| 5 |
Vertiv
VRT
|
+$6.66M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Shopify
SHOP
|
+$20M |
| 2 |
Madrigal Pharmaceuticals
MDGL
|
+$19.8M |
| 3 |
Tesla
TSLA
|
+$13.5M |
| 4 |
Insmed
INSM
|
+$13.4M |
| 5 |
DoorDash
DASH
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 31.91% |
| 2 | Healthcare | 23.47% |
| 3 | Technology | 10.92% |
| 4 | Communication Services | 7.13% |
| 5 | Consumer Discretionary | 3.77% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
PUT
iShares Bitcoin Trust
IBIT
$47B
| – | – |
-1,500
| Closed | -$7.45M |
|
|
77
Insmed
INSM
$23.5B
| – | – |
-77,200
| Closed | -$13.4M |
|
78
Ionis Pharmaceuticals
IONS
$8.99B
| – | – |
-47,488
| Closed | -$3.76M |
|
79
Kiniksa Pharmaceuticals
KNSA
$4.92B
| – | – |
-93,970
| Closed | -$3.88M |
|
80
Lemonade
LMND
$5.16B
| – | – |
-113,917
| Closed | -$8.11M |
|
81
MongoDB
MDB
$25.1B
| – | – |
-22,326
| Closed | -$9.37M |
|
|
82
Madrigal Pharmaceuticals
MDGL
$12.8B
| – | – |
-34,000
| Closed | -$19.8M |
|
83
PUT
Moderna
MRNA
$24.5B
| – | – |
-760
| Closed | -$2.24M |
|
|
RAPT
84
DELISTED
RAPT Therapeutics
RAPT
| – | – |
-94,245
| Closed | -$3.19M |
|
85
RH
RH
$3.56B
| – | – |
-35,000
| Closed | -$6.27M |
|
86
CALL
Rivian
RIVN
$25.3B
| – | – |
-2,420
| Closed | -$4.77M |
|
87
Rocket Companies
RKT
$41.1B
| – | – |
-130,000
| Closed | -$2.52M |
|
88
Roku
ROKU
$21.4B
| – | – |
-61,000
| Closed | -$6.62M |
|
|
89
Shopify
SHOP
$160B
| – | – |
-124,000
| Closed | -$20M |
|
90
SharkNinja
SN
$21.9B
| – | – |
-52,600
| Closed | -$5.89M |
|
91
CALL
Teva Pharmaceuticals
TEVA
$37.3B
| – | – |
-3,000
| Closed | -$9.36M |
|
|
92
Tesla
TSLA
$1.43T
| – | – |
-30,000
| Closed | -$13.5M |
|
93
CALL
Unity
U
$12.7B
| – | – |
-500
| Closed | -$2.21M |
|
94
Reddit
RDDT
$34.9B
| – | – |
-2,000
| Closed | -$460K |
|
|
FIGR
95
Figure Technology Solutions
FIGR
$6.41B
| – | – |
-111,447
| Closed | -$4.55M |
|
|
MDLN
96
Medline Inc
MDLN
$33.6B
| – | – |
-117,800
| Closed | -$4.95M |
|
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Atika Capital Management's Q1 2026 Portfolio in Review
As of Q1 2026, Atika Capital Management held 96 positions worth $796M, down 16% from $950M the previous quarter. Its ten largest holdings account for 52% of the portfolio.
Atika Capital Management withdrew a net $209M in Q1 2026, closing 36 positions and reducing 25 holdings. Its most notable exit was Shopify, an estimated $20M position sold in full.
By sector, the portfolio is most concentrated in Industrials at 32% of assets, up from 20% a quarter earlier, followed by Healthcare and Technology.
Against the trend, Atika Capital Management opened a new position in Western Digital worth $10.2M.
- Atika Capital Management's largest Q1 2026 buy was Western Digital: 37,717 shares worth $10.2M.
- Atika Capital Management added most to Vertiv in Q1 2026, an estimated $6.66M increase.
- Atika Capital Management's biggest Q1 2026 reduction was Talen Energy Corp, cutting an estimated $8.33M.
- Atika Capital Management fully exited Shopify in Q1 2026, selling an estimated $20M.
- Atika Capital Management's ten largest holdings make up 52% of its $796M portfolio in Q1 2026.
- Atika Capital Management opened 19 new positions and closed 36 in Q1 2026.
- Atika Capital Management's portfolio value fell 16% quarter-over-quarter to $796M.
Based on Atika Capital Management's 13F filing for Q1 2026, filed 14 May 2026.