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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4151
MINISO
MNSO
$3.88B
| $211K | ﹤0.01% |
19,682
+9,955
| +102% | +$83.3K |
|
4152
PUT
Senseonics Holdings Inc
SENS
$254M
| $211K | ﹤0.01% |
10,255
-2,390
| -19% | -$55.2K |
|
4153
Millicom
TIGO
$15.8B
| $211K | ﹤0.01% |
+16,740
| New | +$210K |
|
4154
Weatherford International
WFRD
$5.9B
| $211K | ﹤0.01% |
+4,159
| New | +$171K |
|
|
LENZ
4155
CALL
LENZ Therapeutics
LENZ
$179M
| $211K | ﹤0.01% |
9,086
+215
| +2% | +$4.98K |
|
|
PTRA
4156
CALL
DELISTED
Proterra Inc. Common Stock
PTRA
| $211K | ﹤0.01% |
56,200
-102,800
| -65% | -$544K |
|
4157
PUT
Allegro MicroSystems
ALGM
$7.86B
| $210K | ﹤0.01% |
7,000
+6,800
| +3,400% | +$185K |
|
4158
Apple Hospitality REIT
APLE
$3.97B
| $210K | ﹤0.01% |
13,361
+6,460
| +94% | +$104K |
|
4159
LPL Financial
LPLA
$27B
| $210K | ﹤0.01% |
973
-482
| -33% | -$113K |
|
4160
PUT
LivePerson
LPSN
$22M
| $210K | ﹤0.01% |
1,387
+100
| +8% | +$16K |
|
4161
PUT
Pulmonx
LUNG
$52.8M
| $210K | ﹤0.01% |
+25,000
| New | +$238K |
|
|
ESTE
4162
PUT
DELISTED
Earthstone Energy Inc. Class A Common Stock
ESTE
| $210K | ﹤0.01% |
14,800
+10,200
| +222% | +$151K |
|
4163
PUT
Viant Technology
DSP
$229M
| $209K | ﹤0.01% |
52,200
-162,200
| -76% | -$654K |
|
4164
CALL
Jefferies Financial Group
JEF
$12.7B
| $209K | ﹤0.01% |
6,381
-19,455
| -75% | -$646K |
|
4165
CALL
WD-40
WDFC
$2.98B
| $209K | ﹤0.01% |
1,300
+500
| +63% | +$83.4K |
|
|
RCM
4166
PUT
DELISTED
R1 RCM Inc. Common Stock
RCM
| $209K | ﹤0.01% |
19,100
-78,900
| -81% | -$1M |
|
|
BNFT
4167
PUT
DELISTED
Benefitfocus, Inc.
BNFT
| $209K | ﹤0.01% |
20,000
-5,100
| -20% | -$45.8K |
|
4168
ProFrac Holding
ACDC
$653M
| $208K | ﹤0.01% |
+8,292
| New | +$183K |
|
4169
PUT
Clene
CLNN
$60.3M
| $208K | ﹤0.01% |
10,435
-6,190
| -37% | -$144K |
|
|
DCBO
4170
PUT
Docebo
DCBO
$559M
| $208K | ﹤0.01% |
6,300
-500
| -7% | -$15K |
|
|
VNET
4171
CALL
VNET Group
VNET
$1.79B
| $208K | ﹤0.01% |
36,700
-64,100
| -64% | -$330K |
|
|
QVCGA
4172
DELISTED
QVC Group Inc Series A
QVCGA
| $208K | ﹤0.01% |
2,563
+456
| +22% | +$46.5K |
|
|
DNMR
4173
CALL
DELISTED
Danimer Scientific, Inc.
DNMR
| $208K | ﹤0.01% |
2,910
-978
| -25% | -$92.5K |
|
|
BTWN
4174
PUT
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $208K | ﹤0.01% |
21,000
+2,800
| +15% | +$27.7K |
|
4175
CALL
Compass Diversified
CODI
$752M
| $207K | ﹤0.01% |
11,400
-4,300
| -27% | -$80.7K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.