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 | |
|---|---|---|---|---|---|---|
2151
CALL
Prothena Corp
PRTA
$458M
| $1.58M | ﹤0.01% |
32,600
-7,500
| -19% | -$396K |
|
2152
PUT
Saia
SAIA
$11.3B
| $1.58M | ﹤0.01% |
5,800
-14,600
| -72% | -$3.9M |
|
2153
PUT
Novavax
NVAX
$1.23B
| $1.58M | ﹤0.01% |
227,600
-457,800
| -67% | -$4.21M |
|
2154
PUT
Boston Beer
SAM
$1.88B
| $1.58M | ﹤0.01% |
4,800
-3,100
| -39% | -$1.07M |
|
2155
Global X Uranium ETF
URA
$5.52B
| $1.58M | ﹤0.01% |
79,130
+32,676
| +70% | +$691K |
|
2156
CALL
Universal Health Services
UHS
$9.43B
| $1.58M | ﹤0.01% |
12,400
+800
| +7% | +$110K |
|
|
TRTN
2157
PUT
DELISTED
Triton International Limited
TRTN
| $1.57M | ﹤0.01% |
24,900
-17,800
| -42% | -$1.21M |
|
2158
CALL
Telefônica Brasil
VIV
$22.4B
| $1.57M | ﹤0.01% |
207,900
-100
| -0% | -$751 |
|
2159
SS&C Technologies
SSNC
$17.8B
| $1.57M | ﹤0.01% |
27,849
+20,452
| +276% | +$1.18M |
|
2160
CALL
Johnson Controls International
JCI
$87.5B
| $1.57M | ﹤0.01% |
26,100
-84,800
| -76% | -$5.43M |
|
2161
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.56M | ﹤0.01% |
24,100
-36,100
| -60% | -$1.89M |
|
2162
CALL
Mohawk Industries
MHK
$6.9B
| $1.56M | ﹤0.01% |
15,600
+11,800
| +311% | +$1.29M |
|
2163
PUT
Getty Images
GETY
$184M
| $1.56M | ﹤0.01% |
306,600
+232,500
| +314% | +$1.29M |
|
2164
CALL
Coherent
COHR
$55.2B
| $1.56M | ﹤0.01% |
40,900
-32,400
| -44% | -$1.32M |
|
2165
CALL
Paysafe
PSFE
$407M
| $1.55M | ﹤0.01% |
90,000
-45,200
| -33% | -$879K |
|
2166
CALL
FMC
FMC
$1.42B
| $1.55M | ﹤0.01% |
12,700
-4,800
| -27% | -$604K |
|
|
ICPT
2167
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.55M | ﹤0.01% |
115,500
+10,400
| +10% | +$180K |
|
2168
PUT
NCR Voyix
VYX
$1.06B
| $1.55M | ﹤0.01% |
107,091
-11,084
| -9% | -$170K |
|
|
2169
Coherent
COHR
$55.2B
| $1.55M | ﹤0.01% |
40,631
+34,449
| +557% | +$1.4M |
|
|
ISEE
2170
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $1.55M | ﹤0.01% |
63,605
+21,970
| +53% | +$481K |
|
2171
Dollar Tree
DLTR
$23.1B
| $1.54M | ﹤0.01% |
+10,765
| New | +$1.56M |
|
2172
CALL
Trump Media & Technology Group
DJT
$2.37B
| $1.54M | ﹤0.01% |
109,500
-241,200
| -69% | -$3.58M |
|
2173
PUT
Lamb Weston
LW
$6.82B
| $1.54M | ﹤0.01% |
14,700
+11,500
| +359% | +$1.14M |
|
2174
Avantis US Small Cap Value ETF
AVUV
$29.7B
| $1.53M | ﹤0.01% |
+20,733
| New | +$1.62M |
|
2175
CALL
CoStar Group
CSGP
$11.3B
| $1.53M | ﹤0.01% |
22,300
-8,900
| -29% | -$657K |
|
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.