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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 | |
|---|---|---|---|---|---|---|
51
Xenon Pharmaceuticals
XENE
$6.6B
| $3.48M | 0.44% |
59,900
-32,606
| -35% | -$1.5M |
|
52
BBB Foods
TBBB
$4.91B
| $3.37M | 0.42% |
95,218
-47,064
| -33% | -$1.65M |
|
|
MAZE
53
Maze Therapeutics
MAZE
$1.56B
| $3.33M | 0.42% |
+111,500
| New | +$4.92M |
|
|
ABVX
54
Abivax
ABVX
$11.9B
| $3.21M | 0.4% |
28,800
-26,200
| -48% | -$3.1M |
|
55
Acadia Healthcare
ACHC
$3.17B
| $2.87M | 0.36% |
+122,600
| New | +$2.22M |
|
56
Warby Parker
WRBY
$3.24B
| $2.84M | 0.36% |
135,000
-113,971
| -46% | -$2.83M |
|
57
Krystal Biotech
KRYS
$10.5B
| $2.74M | 0.34% |
+10,625
| New | +$2.83M |
|
58
BridgeBio Pharma
BBIO
$15.9B
| $2.61M | 0.33% |
+35,200
| New | +$2.55M |
|
|
HUT
59
Hut 8
HUT
$10.3B
| $2.31M | 0.29% |
+49,300
| New | +$2.67M |
|
60
HEICO Corp Class A
HEI.A
$34.9B
| $2.23M | 0.28% |
+10,575
| New | +$2.6M |
|
61
Applied Optoelectronics
AAOI
$8.22B
| – | – |
-87,657
| Closed | -$3.06M |
|
62
Alnylam Pharmaceuticals
ALNY
$35.7B
| – | – |
-10,339
| Closed | -$4.11M |
|
63
Abercrombie & Fitch
ANF
$4.23B
| – | – |
-29,000
| Closed | -$3.65M |
|
64
Axsome Therapeutics
AXSM
$11.8B
| – | – |
-55,500
| Closed | -$10.1M |
|
65
Bath & Body Works
BBWI
$4.21B
| – | – |
-225,000
| Closed | -$4.52M |
|
|
CDTX
66
CALL
DELISTED
Cidara Therapeutics
CDTX
| – | – |
-49
| Closed | -$1.08M |
|
67
Ceco Environmental
CECO
$4.67B
| – | – |
-29,804
| Closed | -$1.78M |
|
68
Carlisle Companies
CSL
$14B
| – | – |
-25,300
| Closed | -$8.09M |
|
|
69
DoorDash
DASH
$80.2B
| – | – |
-46,000
| Closed | -$10.4M |
|
70
CALL
iShares MSCI Emerging Markets ETF
EEM
$28B
| – | – |
-816
| Closed | -$4.46M |
|
71
CALL
Eos Energy Enterprises
EOSE
$1.47B
| – | – |
-3,720
| Closed | -$4.26M |
|
|
EMBJ
72
Embraer S.A. ADS
EMBJ
$11.4B
| – | – |
-115,930
| Closed | -$7.46M |
|
73
CALL
Floor & Decor
FND
$6.14B
| – | – |
-800
| Closed | -$4.87M |
|
74
Robinhood
HOOD
$89.7B
| – | – |
-51,500
| Closed | -$5.82M |
|
|
75
PUT
Robinhood
HOOD
$89.7B
| – | – |
-700
| Closed | -$7.92M |
|
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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.