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 | |
|---|---|---|---|---|---|---|
1826
CALL
Treace Medical Concepts
TMCI
$259M
| $2.28M | ﹤0.01% |
90,700
+81,000
| +835% | +$1.9M |
|
1827
CALL
Viatris
VTRS
$20.1B
| $2.28M | ﹤0.01% |
236,900
-398,300
| -63% | -$4.42M |
|
1828
Concentrix
CNXC
$1.36B
| $2.27M | ﹤0.01% |
18,697
+17,034
| +1,024% | +$2.31M |
|
1829
CALL
Cimpress
CMPR
$2.37B
| $2.27M | ﹤0.01% |
51,800
+51,700
| +51,700% | +$1.77M |
|
1830
PUT
MarketAxess Holdings
MKTX
$4.15B
| $2.27M | ﹤0.01% |
5,800
+5,600
| +2,800% | +$1.98M |
|
1831
CALL
Global E Online
GLBE
$6.08B
| $2.26M | ﹤0.01% |
70,200
+28,800
| +70% | +$789K |
|
1832
CALL
Papa John's
PZZA
$999M
| $2.26M | ﹤0.01% |
30,200
-1,300
| -4% | -$110K |
|
1833
PUT
Cheesecake Factory
CAKE
$4.21B
| $2.26M | ﹤0.01% |
64,500
+4,300
| +7% | +$160K |
|
1834
CALL
Chemours
CC
$2.59B
| $2.26M | ﹤0.01% |
75,500
-51,900
| -41% | -$1.71M |
|
1835
PUT
Magna International
MGA
$17.9B
| $2.26M | ﹤0.01% |
42,200
+30,400
| +258% | +$1.76M |
|
1836
CALL
Natural Resource Partners
NRP
$1.3B
| $2.26M | ﹤0.01% |
43,300
+30,400
| +236% | +$1.63M |
|
1837
PTC
PTC
$13.7B
| $2.26M | ﹤0.01% |
+17,607
| New | +$2.24M |
|
1838
TransUnion
TRU
$14.8B
| $2.25M | ﹤0.01% |
+36,304
| New | +$2.38M |
|
1839
PUT
FirstEnergy
FE
$28.9B
| $2.25M | ﹤0.01% |
56,200
+52,400
| +1,379% | +$2.12M |
|
1840
PUT
STAAR Surgical
STAA
$1.16B
| $2.25M | ﹤0.01% |
35,200
-20,600
| -37% | -$1.34M |
|
1841
PUT
Coupang
CPNG
$27.8B
| $2.25M | ﹤0.01% |
140,600
-214,800
| -60% | -$3.33M |
|
1842
Spectrum Brands
SPB
$2.04B
| $2.25M | ﹤0.01% |
33,950
+30,681
| +939% | +$1.94M |
|
1843
PUT
Virgin Galactic
SPCE
$320M
| $2.25M | ﹤0.01% |
27,765
+6,350
| +30% | +$633K |
|
1844
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.34B
| $2.24M | ﹤0.01% |
69,569
+34,745
| +100% | +$1.27M |
|
1845
CALL
Asana
ASAN
$1.58B
| $2.24M | ﹤0.01% |
105,900
-12,200
| -10% | -$202K |
|
1846
CALL
British American Tobacco
BTI
$132B
| $2.24M | ﹤0.01% |
63,700
-21,500
| -25% | -$811K |
|
1847
PUT
National Grid
NGG
$81.9B
| $2.24M | ﹤0.01% |
34,913
+7,959
| +30% | +$477K |
|
1848
PUT
Motorola Solutions
MSI
$69.4B
| $2.23M | ﹤0.01% |
7,800
+2,100
| +37% | +$554K |
|
1849
PUT
PureCycle Technologies
PCT
$1.17B
| $2.23M | ﹤0.01% |
318,800
+316,900
| +16,679% | +$2.21M |
|
1850
PUT
FTI Consulting
FCN
$4.82B
| $2.23M | ﹤0.01% |
+11,300
| New | +$1.96M |
|
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.