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 | |
|---|---|---|---|---|---|---|
5126
Newell Brands
NWL
$2.18B
| $102K | ﹤0.01% |
+8,247
| New | +$116K |
|
5127
PUT
OSI Systems
OSIS
$3.62B
| $102K | ﹤0.01% |
1,000
-100
| -9% | -$9.26K |
|
5128
CALL
Phathom Pharmaceuticals
PHAT
$720M
| $102K | ﹤0.01% |
14,400
+9,900
| +220% | +$87K |
|
5129
PUT
RPC Inc
RES
$1.2B
| $102K | ﹤0.01% |
13,300
-16,400
| -55% | -$146K |
|
5130
PUT
ReNew
RNW
$2.25B
| $102K | ﹤0.01% |
18,200
-283,600
| -94% | -$1.51M |
|
5131
PUT
Sabesp
SBS
$19.2B
| $102K | ﹤0.01% |
52,597
-166,040
| -76% | -$328K |
|
5132
CALL
Spok Holdings
SPOK
$225M
| $102K | ﹤0.01% |
+10,100
| New | +$92.2K |
|
5133
ProShares UltraPro Short 20+ Year Treasury
TTT
$19M
| $102K | ﹤0.01% |
+1,682
| New | +$110K |
|
|
SBOW
5134
CALL
DELISTED
SilverBow Resources, Inc.
SBOW
| $102K | ﹤0.01% |
4,500
-18,800
| -81% | -$464K |
|
5135
CALL
Ardmore Shipping
ASC
$703M
| $101K | ﹤0.01% |
6,800
+3,200
| +89% | +$50.2K |
|
5136
PUT
Cipher Digital
CIFR
$9.27B
| $101K | ﹤0.01% |
+43,500
| New | +$66.9K |
|
5137
Equitable Holdings
EQH
$13.3B
| $101K | ﹤0.01% |
+4,015
| New | +$118K |
|
5138
CALL
ImmunityBio
IBRX
$7.8B
| $101K | ﹤0.01% |
56,000
+600
| +1% | +$1.87K |
|
5139
PUT
Incyte
INCY
$24.9B
| $101K | ﹤0.01% |
1,400
-8,000
| -85% | -$626K |
|
5140
Ituran Location and Control
ITRN
$1.1B
| $101K | ﹤0.01% |
4,643
-10,506
| -69% | -$232K |
|
5141
CALL
Pegasystems
PEGA
$4.94B
| $101K | ﹤0.01% |
4,200
+3,800
| +950% | +$80.1K |
|
5142
CALL
Sally Beauty Holdings
SBH
$1.46B
| $101K | ﹤0.01% |
6,500
-7,100
| -52% | -$110K |
|
5143
PUT
Shutterstock
SSTK
$198M
| $101K | ﹤0.01% |
1,400
+600
| +75% | +$42K |
|
5144
Tyler Technologies
TYL
$13.3B
| $101K | ﹤0.01% |
+287
| New | +$93.4K |
|
|
SHCR
5145
CALL
DELISTED
Sharecare, Inc. Class A Common Stock
SHCR
| $101K | ﹤0.01% |
71,400
+36,600
| +105% | +$82.9K |
|
|
TELL
5146
PUT
DELISTED
Tellurian Inc.
TELL
| $101K | ﹤0.01% |
82,900
-332,100
| -80% | -$529K |
|
5147
Alarm.com
ALRM
$2.68B
| $100K | ﹤0.01% |
+1,996
| New | +$103K |
|
5148
PUT
Freedom Holding
FRHC
$9.88B
| $100K | ﹤0.01% |
1,400
+700
| +100% | +$47.4K |
|
5149
Invesco CurrencyShares Euro Currency Trust
FXE
$346M
| $100K | ﹤0.01% |
1,000
-40,685
| -98% | -$4.03M |
|
5150
CALL
Integer Holdings
ITGR
$3.42B
| $100K | ﹤0.01% |
1,300
+800
| +160% | +$58.6K |
|
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.