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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4126
PUT
Cemex
CX
$17.3B
| $512K | ﹤0.01% |
61,000
+60,385
| +9,819% | +$480K |
|
4127
CALL
Evolus
EOLS
$410M
| $512K | ﹤0.01% |
40,500
+40,207
| +13,723% | +$442K |
|
|
LL
4128
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $512K | ﹤0.01% |
24,300
+23,990
| +7,739% | +$565K |
|
4129
Owens Corning
OC
$11.5B
| $511K | ﹤0.01% |
5,220
-1,390
| -21% | -$139K |
|
4130
Aaon
AAON
$7.68B
| $510K | ﹤0.01% |
12,245
+11,477
| +1,494% | +$506K |
|
4131
PUT
Invesco
IVZ
$13B
| $510K | ﹤0.01% |
19,100
+18,927
| +10,940% | +$516K |
|
|
SUNW
4132
PUT
DELISTED
Sunworks, Inc.
SUNW
| $510K | ﹤0.01% |
48,600
+48,422
| +27,203% | +$500K |
|
4133
PUT
Fossil Group
FOSL
$262M
| $509K | ﹤0.01% |
35,700
+35,551
| +23,860% | +$468K |
|
4134
PUT
Autoliv
ALV
$9.09B
| $508K | ﹤0.01% |
5,200
+5,091
| +4,671% | +$513K |
|
4135
PUT
Westwater Resources
WWR
$51.6M
| $508K | ﹤0.01% |
106,800
+105,579
| +8,647% | +$477K |
|
4136
PUT
Gray Television
GTN
$430M
| $507K | ﹤0.01% |
+21,700
| New | +$471K |
|
4137
State Street SPDR S&P Semiconductor ETF
XSD
$2.63B
| $507K | ﹤0.01% |
2,636
+1,712
| +185% | +$308K |
|
|
VIEW
4138
PUT
DELISTED
View, Inc. Class A Common Stock
VIEW
| $507K | ﹤0.01% |
998
+987
| +8,973% | +$484K |
|
4139
PUT
Pathward Financial
CASH
$1.87B
| $506K | ﹤0.01% |
10,000
+9,999
| +999,900% | +$496K |
|
4140
Eagle Materials
EXP
$6.86B
| $506K | ﹤0.01% |
3,561
-5,833
| -62% | -$839K |
|
|
FFAI
4141
CALL
Faraday Future Intelligent Electric
FFAI
$11.9M
| – | – |
0
| – | – |
|
|
ENZ
4142
PUT
DELISTED
Enzo Biochem, Inc.
ENZ
| $506K | ﹤0.01% |
159,700
+155,611
| +3,806% | +$489K |
|
|
BNFT
4143
DELISTED
Benefitfocus, Inc.
BNFT
| $506K | ﹤0.01% |
35,949
-19,329
| -35% | -$273K |
|
|
AVEO
4144
PUT
DELISTED
AVEO Pharmaceuticals, Inc.
AVEO
| $506K | ﹤0.01% |
76,800
+76,288
| +14,900% | +$526K |
|
4145
DNOW Inc
DNOW
$2.53B
| $505K | ﹤0.01% |
+53,297
| New | +$550K |
|
4146
PUT
Main Street Capital
MAIN
$5.14B
| $505K | ﹤0.01% |
12,300
+12,003
| +4,041% | +$499K |
|
4147
CALL
Wrap Technologies
WRAP
$96.4M
| $505K | ﹤0.01% |
64,400
+64,286
| +56,391% | +$441K |
|
4148
CALL
YPF
YPF
$19.5B
| $505K | ﹤0.01% |
108,100
+107,016
| +9,872% | +$481K |
|
4149
Butterfly Network
BFLY
$1.88B
| $504K | ﹤0.01% |
34,815
+34,695
| +28,913% | +$468K |
|
4150
PUT
Globant
GLOB
$1.52B
| $504K | ﹤0.01% |
2,300
+2,277
| +9,900% | +$500K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.