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 | |
|---|---|---|---|---|---|---|
4201
CALL
SkinHealth Systems
SKIN
$90.5M
| $221K | ﹤0.01% |
17,500
-30,900
| -64% | -$357K |
|
4202
Symbotic
SYM
$5.39B
| $221K | ﹤0.01% |
9,690
+5,666
| +141% | +$94.7K |
|
4203
Mitsubishi UFJ Financial
MUFG
$253B
| $220K | ﹤0.01% |
34,538
+29,882
| +642% | +$209K |
|
4204
PUT
Roivant Sciences
ROIV
$24.3B
| $220K | ﹤0.01% |
29,900
+23,600
| +375% | +$194K |
|
4205
Verisk Analytics
VRSK
$27.8B
| $220K | ﹤0.01% |
+1,148
| New | +$208K |
|
|
DMTK
4206
CALL
DELISTED
DermTech, Inc. Common Stock
DMTK
| $220K | ﹤0.01% |
60,000
+28,900
| +93% | +$122K |
|
|
BGFV
4207
PUT
DELISTED
Big 5 Sporting Goods
BGFV
| $219K | ﹤0.01% |
28,500
+1,400
| +5% | +$12.7K |
|
4208
CALL
Healthpeak Properties
DOC
$15.7B
| $219K | ﹤0.01% |
10,000
-53,500
| -84% | -$1.33M |
|
4209
PUT
Embecta
EMBC
$213M
| $219K | ﹤0.01% |
7,800
+5,700
| +271% | +$162K |
|
4210
CALL
Extreme Networks
EXTR
$3.92B
| $219K | ﹤0.01% |
11,500
-25,000
| -68% | -$461K |
|
4211
Kinross Gold
KGC
$28.1B
| $219K | ﹤0.01% |
46,600
-50,083
| -52% | -$212K |
|
4212
PUT
Moelis & Co
MC
$5.1B
| $219K | ﹤0.01% |
5,700
+5,000
| +714% | +$215K |
|
4213
Intellia Therapeutics
NTLA
$1.52B
| $219K | ﹤0.01% |
5,896
+4,047
| +219% | +$159K |
|
4214
SFL Corp
SFL
$1.61B
| $219K | ﹤0.01% |
23,146
+7,858
| +51% | +$77.6K |
|
|
JJT
4215
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $219K | ﹤0.01% |
5,500
-5,500
| -50% | -$457K |
|
4216
CALL
Kodak
KODK
$812M
| $218K | ﹤0.01% |
53,200
-6,800
| -11% | -$24.5K |
|
4217
Kosmos Energy
KOS
$1.39B
| $218K | ﹤0.01% |
29,338
-79,722
| -73% | -$584K |
|
|
SVM
4218
CALL
Silvercorp Metals
SVM
$2.08B
| $218K | ﹤0.01% |
57,300
+20,500
| +56% | +$67.5K |
|
4219
TaskUs
TASK
$568M
| $218K | ﹤0.01% |
15,163
-571
| -4% | -$9.94K |
|
|
TPIC
4220
DELISTED
TPI Composites
TPIC
| $218K | ﹤0.01% |
16,777
+15,822
| +1,657% | +$202K |
|
4221
CALL
CVRx
CVRX
$131M
| $217K | ﹤0.01% |
+23,300
| New | +$308K |
|
4222
CALL
Qfin Holdings
QFIN
$1.66B
| $217K | ﹤0.01% |
11,200
-33,900
| -75% | -$711K |
|
4223
CALL
Regenxbio
RGNX
$615M
| $217K | ﹤0.01% |
11,500
+6,200
| +117% | +$137K |
|
4224
PUT
Casey's General Stores
CASY
$31.7B
| $216K | ﹤0.01% |
1,000
| – | – |
|
4225
CALL
JFrog
FROG
$9.26B
| $216K | ﹤0.01% |
11,000
+300
| +3% | +$6.68K |
|
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.