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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
CALL
iShares Morningstar Value ETF
ILCV
$1.33B
| $90.5M | 0.06% |
1,177,800
-707,200
| -38% | -$67.7M |
|
127
PUT
Dell
DELL
$346B
| $90.1M | 0.06% |
548,900
-350,200
| -39% | -$46.7M |
|
128
CALL
Lam Research
LRCX
$394B
| $89.7M | 0.06% |
420,000
-123,900
| -23% | -$27.7M |
|
129
CALL
Applied Materials
AMAT
$386B
| $88.6M | 0.06% |
259,100
-192,400
| -43% | -$64.7M |
|
|
NVO
130
CALL
Novo Nordisk
NVO
$171B
| $87.8M | 0.06% |
2,389,900
-71,800
| -3% | -$3.4M |
|
131
CALL
Arm
ARM
$303B
| $86.3M | 0.06% |
570,400
-398,400
| -41% | -$48.3M |
|
132
Alphabet (Google) Class A
GOOGL
$4.19T
| $85.2M | 0.06% |
296,315
+257,547
| +664% | +$80.9M |
|
133
CALL
Nike
NKE
$54B
| $83.9M | 0.06% |
1,588,400
-791,300
| -33% | -$48M |
|
134
CALL
Uber
UBER
$139B
| $83.6M | 0.06% |
1,162,000
-448,800
| -28% | -$34.5M |
|
135
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$6.5B
| $83.1M | 0.06% |
1,631,700
-1,122,100
| -41% | -$120M |
|
136
PUT
CrowdStrike
CRWD
$265B
| $83M | 0.06% |
850,000
-563,200
| -40% | -$59.7M |
|
|
137
PUT
Applied Materials
AMAT
$386B
| $82.8M | 0.06% |
242,200
-228,200
| -49% | -$76.8M |
|
138
CALL
Johnson & Johnson
JNJ
$655B
| $82.1M | 0.06% |
335,900
-338,000
| -50% | -$78.7M |
|
139
CALL
Verizon
VZ
$194B
| $81.9M | 0.05% |
1,631,700
-861,800
| -35% | -$39.9M |
|
140
CALL
Wells Fargo
WFC
$244B
| $81M | 0.05% |
1,017,200
+79,000
| +8% | +$6.79M |
|
141
CALL
Caterpillar
CAT
$377B
| $80.8M | 0.05% |
114,000
-47,900
| -30% | -$33.2M |
|
142
PUT
Freeport-McMoran
FCX
$103B
| $79.7M | 0.05% |
1,356,500
-865,000
| -39% | -$52.3M |
|
143
CALL
Marvell Technology
MRVL
$226B
| $79.4M | 0.05% |
801,300
-47,000
| -6% | -$3.95M |
|
144
CALL
GE Vernova
GEV
$253B
| $78.3M | 0.05% |
89,700
-30,700
| -25% | -$24M |
|
145
CALL
Palo Alto Networks
PANW
$321B
| $78.1M | 0.05% |
487,100
-148,400
| -23% | -$24.9M |
|
146
UnitedHealth
UNH
$339B
| $77.8M | 0.05% |
287,580
+194,855
| +210% | +$58M |
|
147
PUT
Salesforce
CRM
$187B
| $77.2M | 0.05% |
413,500
-135,500
| -25% | -$28.1M |
|
148
CALL
Iris Energy
IREN
$16.4B
| $76.4M | 0.05% |
2,229,100
-2,148,700
| -49% | -$97M |
|
149
Oracle
ORCL
$401B
| $75.7M | 0.05% |
514,658
+383,259
| +292% | +$62.3M |
|
150
PUT
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$21.9M
| $75.6M | 0.05% |
1,906,600
+1,899,300
| +26,018% | +$53.8M |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.