Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SNDK
76
CALL
Sandisk
SNDK
$235B
| $167M | 0.11% |
262,500
+177,900
| +210% | +$100M |
|
77
CALL
Walmart Inc
WMT
$878B
| $165M | 0.11% |
1,325,600
-141,800
| -10% | -$17.4M |
|
78
CALL
Carvana
CVNA
$47B
| $161M | 0.11% |
2,561,000
+559,000
| +28% | +$41.5M |
|
|
79
Amazon
AMZN
$2.66T
| $159M | 0.11% |
+764,884
| New | +$168M |
|
80
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $157M | 0.11% |
339,500
-611,500
| -64% | -$296M |
|
81
CALL
Chevron
CVX
$381B
| $154M | 0.1% |
745,800
+192,800
| +35% | +$35.2M |
|
82
CALL
CrowdStrike
CRWD
$195B
| $153M | 0.1% |
1,570,800
-76,400
| -5% | -$8.1M |
|
83
CALL
ASML
ASML
$692B
| $147M | 0.1% |
111,200
-25,500
| -19% | -$34.9M |
|
84
CALL
Costco
COST
$412B
| $140M | 0.09% |
140,800
-194,900
| -58% | -$190M |
|
85
CALL
Bank of America
BAC
$430B
| $137M | 0.09% |
2,802,000
+711,900
| +34% | +$36.7M |
|
86
CALL
Boeing
BA
$161B
| $137M | 0.09% |
686,300
-521,400
| -43% | -$119M |
|
|
87
PUT
Boeing
BA
$161B
| $137M | 0.09% |
686,000
-258,700
| -27% | -$58.9M |
|
88
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $132M | 0.09% |
202,806
+115,288
| +132% | +$78.4M |
|
|
89
Meta Platforms (Facebook)
META
$1.63T
| $132M | 0.09% |
229,853
+167,185
| +267% | +$107M |
|
90
CALL
Salesforce
CRM
$139B
| $127M | 0.09% |
679,200
-5,100
| -0.7% | -$1.06M |
|
91
CALL
SoFi Technologies
SOFI
$22.6B
| $127M | 0.08% |
7,969,500
+2,759,500
| +53% | +$58.2M |
|
|
92
PUT
Carvana
CVNA
$47B
| $126M | 0.08% |
2,010,500
-335,500
| -14% | -$24.9M |
|
93
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $126M | 0.08% |
2,537,600
-1,325,400
| -34% | -$142M |
|
94
CALL
PayPal
PYPL
$49.3B
| $124M | 0.08% |
2,734,700
-1,069,800
| -28% | -$51.6M |
|
|
95
PUT
Walmart Inc
WMT
$878B
| $124M | 0.08% |
994,800
-1,061,400
| -52% | -$130M |
|
96
PUT
Applovin
APP
$144B
| $122M | 0.08% |
307,700
+5,100
| +2% | +$2.47M |
|
|
97
TSMC
TSM
$2.2T
| $119M | 0.08% |
+351,805
| New | +$121M |
|
98
PUT
Arm
ARM
$309B
| $118M | 0.08% |
779,400
-336,400
| -30% | -$40.8M |
|
99
CALL
Robinhood
HOOD
$95.5B
| $115M | 0.08% |
1,655,600
-1,398,600
| -46% | -$123M |
|
|
UWC
100
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $113M | 0.08% |
2,462,100
+113,600
| +5% | +$5.23M |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.