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 | |
|---|---|---|---|---|---|---|
4151
PUT
Freshworks
FRSH
$3.09B
| $233K | ﹤0.01% |
15,200
+1,700
| +13% | +$25.8K |
|
4152
PUT
GoDaddy
GDDY
$13.6B
| $233K | ﹤0.01% |
3,000
-10,200
| -77% | -$787K |
|
4153
CALL
Trex
TREX
$4.57B
| $233K | ﹤0.01% |
4,800
-1,500
| -24% | -$75.9K |
|
4154
CALL
Kontoor Brands
KTB
$4.87B
| $232K | ﹤0.01% |
4,800
+2,700
| +129% | +$128K |
|
4155
PUT
Matsons
MATX
$6.15B
| $232K | ﹤0.01% |
3,900
-700
| -15% | -$45.1K |
|
|
RVPH
4156
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $232K | ﹤0.01% |
2,775
+2,410
| +660% | +$210K |
|
|
ROCC
4157
CALL
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $232K | ﹤0.01% |
5,700
-5,600
| -50% | -$229K |
|
4158
CALL
Agilysys
AGYS
$3.12B
| $231K | ﹤0.01% |
2,800
-400
| -13% | -$32.3K |
|
|
SNBR
4159
CALL
DELISTED
Sleep Number
SNBR
| $231K | ﹤0.01% |
7,600
+6,700
| +744% | +$219K |
|
4160
PUT
Sypris Solutions
SYPR
$44.4M
| $231K | ﹤0.01% |
117,500
+58,700
| +100% | +$116K |
|
4161
PUT
Arhaus
ARHS
$1.12B
| $230K | ﹤0.01% |
27,800
-43,400
| -61% | -$524K |
|
4162
CALL
Insperity
NSP
$2.01B
| $230K | ﹤0.01% |
1,900
-1,600
| -46% | -$187K |
|
4163
PUT
NatWest
NWG
$70.6B
| $230K | ﹤0.01% |
34,900
-3,600
| -9% | -$25.4K |
|
|
ABK
4164
PUT
DELISTED
Ambac Financial Group
ABK
| $230K | ﹤0.01% |
14,900
+4,600
| +45% | +$71K |
|
4165
CALL
Beam Therapeutics
BEAM
$2.7B
| $229K | ﹤0.01% |
7,500
+4,000
| +114% | +$158K |
|
4166
PUT
Church & Dwight Co
CHD
$23.7B
| $229K | ﹤0.01% |
2,600
-5,300
| -67% | -$442K |
|
4167
CALL
Sabesp
SBS
$19.4B
| $229K | ﹤0.01% |
118,084
-191,307
| -62% | -$378K |
|
4168
Albertsons Companies
ACI
$5.67B
| $228K | ﹤0.01% |
+10,988
| New | +$227K |
|
4169
CALL
CONMED
CNMD
$1.33B
| $228K | ﹤0.01% |
2,200
-9,900
| -82% | -$957K |
|
4170
PUT
Destination XL Group
DXLG
$34.3M
| $228K | ﹤0.01% |
41,500
| – | – |
|
4171
PUT
Titan Machinery
TITN
$458M
| $228K | ﹤0.01% |
7,500
+4,400
| +142% | +$179K |
|
4172
CALL
Voyager Therapeutics
VYGR
$184M
| $228K | ﹤0.01% |
29,700
+6,600
| +29% | +$52.5K |
|
|
DICE
4173
DELISTED
DICE Therapeutics, Inc. Common Stock
DICE
| $228K | ﹤0.01% |
7,977
+3,959
| +99% | +$117K |
|
4174
PUT
Federal Realty Investment Trust
FRT
$10.9B
| $227K | ﹤0.01% |
2,300
+1,300
| +130% | +$136K |
|
|
SLGC
4175
DELISTED
SomaLogic, Inc. Class A Common Stock
SLGC
| $227K | ﹤0.01% |
89,198
+26,939
| +43% | +$77.2K |
|
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.