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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
CALL
Booking.com
BKNG
$139B
| $66.6M | 0.06% |
627,500
-650,000
| -51% | -$63.3M |
|
227
PUT
Marathon Petroleum
MPC
$93.3B
| $66.5M | 0.06% |
492,900
+145,100
| +42% | +$18.2M |
|
228
PUT
United Parcel Service
UPS
$98.9B
| $66.3M | 0.06% |
341,800
-48,600
| -12% | -$8.91M |
|
|
229
CALL
United Parcel Service
UPS
$98.9B
| $66.3M | 0.06% |
341,600
-62,000
| -15% | -$11.4M |
|
230
CALL
Bristol-Myers Squibb
BMY
$124B
| $66.2M | 0.06% |
954,600
-142,600
| -13% | -$10.1M |
|
231
CALL
Pfizer
PFE
$142B
| $66.1M | 0.06% |
1,619,200
-1,504,500
| -48% | -$65M |
|
232
CALL
Accenture
ACN
$86.2B
| $65.7M | 0.06% |
229,800
+31,400
| +16% | +$8.56M |
|
233
PUT
Blackrock
BLK
$161B
| $65.1M | 0.06% |
97,300
-6,800
| -7% | -$4.79M |
|
234
CALL
Pinterest
PINS
$12.8B
| $65M | 0.06% |
2,384,700
-1,622,700
| -40% | -$42M |
|
235
CALL
ServiceNow
NOW
$105B
| $64.6M | 0.06% |
695,000
+8,000
| +1% | +$697K |
|
236
PUT
Cigna
CI
$76.8B
| $64.4M | 0.06% |
252,200
+96,700
| +62% | +$28.2M |
|
237
PUT
Autodesk
ADSK
$44.6B
| $64.2M | 0.06% |
308,500
+67,000
| +28% | +$13.8M |
|
238
CALL
Oracle
ORCL
$366B
| $63.4M | 0.06% |
682,800
-405,100
| -37% | -$35.5M |
|
239
PUT
BP
BP
$110B
| $62.8M | 0.06% |
1,654,000
+73,800
| +5% | +$2.76M |
|
240
PUT
Atlassian
TEAM
$23B
| $62.6M | 0.06% |
365,700
+201,000
| +122% | +$32.1M |
|
241
PUT
Baidu
BIDU
$36.8B
| $62.3M | 0.05% |
413,000
+18,900
| +5% | +$2.68M |
|
242
PUT
T-Mobile US
TMUS
$206B
| $62.3M | 0.05% |
430,100
-142,300
| -25% | -$20.6M |
|
243
CALL
ASML
ASML
$692B
| $62.1M | 0.05% |
91,200
-12,800
| -12% | -$8.22M |
|
244
CALL
3M
MMM
$89.1B
| $62M | 0.05% |
705,520
+227,838
| +48% | +$21.5M |
|
245
CALL
AT&T
T
$155B
| $61.7M | 0.05% |
3,774,700
-3,254,600
| -46% | -$62.2M |
|
246
PUT
Marvell Technology
MRVL
$187B
| $61.3M | 0.05% |
1,416,500
+757,500
| +115% | +$31.9M |
|
247
PUT
Carnival Corporation Ltd
CCL
$35.8B
| $61.1M | 0.05% |
6,018,000
+1,507,100
| +33% | +$15.6M |
|
248
PUT
Texas Instruments
TXN
$265B
| $61M | 0.05% |
327,700
-158,300
| -33% | -$27.8M |
|
249
PUT
Spotify
SPOT
$101B
| $60.4M | 0.05% |
452,200
+223,900
| +98% | +$25.6M |
|
250
CALL
Invesco DB US Dollar Index Bullish Fund
UUP
$433M
| $60.2M | 0.05% |
2,444,000
+979,200
| +67% | +$27.4M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.