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 | |
|---|---|---|---|---|---|---|
7151
CALL
cbdMD
YCBD
$4.94M
| $74K | ﹤0.01% |
72
+70
| +3,500% | +$83.7K |
|
|
CORR
7152
DELISTED
CorEnergy Infrastructure Trust, Inc.
CORR
| $74K | ﹤0.01% |
11,228
+9,235
| +463% | +$59.1K |
|
|
ZYNE
7153
PUT
DELISTED
Zynerba Pharmaceuticals, Inc
ZYNE
| $74K | ﹤0.01% |
+14,100
| New | +$67.8K |
|
|
NEX
7154
CALL
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $74K | ﹤0.01% |
15,600
+15,496
| +14,900% | +$68.1K |
|
|
CTIC
7155
CALL
DELISTED
CTI BioPharma Corp. (DE) Common Stock
CTIC
| $74K | ﹤0.01% |
29,600
+29,551
| +60,308% | +$70.9K |
|
7156
Afya
AFYA
$1.31B
| $73K | ﹤0.01% |
2,870
+2,851
| +15,005% | +$67.1K |
|
7157
PUT
American Public Education
APEI
$910M
| $73K | ﹤0.01% |
2,600
+2,566
| +7,547% | +$77.5K |
|
7158
PUT
Bright Horizons
BFAM
$4.1B
| $73K | ﹤0.01% |
500
+498
| +24,900% | +$74.5K |
|
7159
CALL
DMC Global
BOOM
$128M
| $73K | ﹤0.01% |
1,300
+1,280
| +6,400% | +$70.4K |
|
7160
dLocal
DLO
$4.41B
| $73K | ﹤0.01% |
+1,405
| New | +$54K |
|
7161
DiaMedica Therapeutics
DMAC
$351M
| $73K | ﹤0.01% |
16,441
+16,187
| +6,373% | +$133K |
|
7162
PUT
Galectin Therapeutics
GALT
$213M
| $73K | ﹤0.01% |
23,100
+22,915
| +12,386% | +$81.5K |
|
|
RJET
7163
Republic Airways Holdings
RJET
$1.02B
| $73K | ﹤0.01% |
523
+476
| +1,013% | +$76.7K |
|
7164
CALL
Smart Sand
SND
$179M
| $73K | ﹤0.01% |
22,200
+22,119
| +27,307% | +$57.9K |
|
7165
Sonoco
SON
$5.62B
| $73K | ﹤0.01% |
1,105
+591
| +115% | +$39.2K |
|
|
VVNT
7166
CALL
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
| $73K | ﹤0.01% |
5,600
+5,517
| +6,647% | +$73.9K |
|
|
SLAI
7167
DELISTED
SOLAI Ltd ADS
SLAI
| $72K | ﹤0.01% |
132
-255
| -66% | -$226K |
|
7168
PUT
Cabaletta Bio
CABA
$444M
| $72K | ﹤0.01% |
+8,400
| New | +$82.5K |
|
7169
PUT
Carpenter Technology
CRS
$25B
| $72K | ﹤0.01% |
1,800
+1,785
| +11,900% | +$75.4K |
|
7170
PUT
Eversource Energy
ES
$27.8B
| $72K | ﹤0.01% |
900
+890
| +8,900% | +$74.9K |
|
7171
Schwab Fundamental US Small Company Index ETF
FNDA
$9.13B
| $72K | ﹤0.01% |
2,656
-920
| -26% | -$24.5K |
|
7172
CALL
Gladstone Investment Corp
GAIN
$646M
| $72K | ﹤0.01% |
5,000
+4,972
| +17,757% | +$69.4K |
|
7173
Gaming and Leisure Properties
GLPI
$12.7B
| $72K | ﹤0.01% |
1,555
-595
| -28% | -$27.4K |
|
|
GOCO
7174
DELISTED
GoHealth
GOCO
| $72K | ﹤0.01% |
432
-1,587
| -79% | -$278K |
|
7175
CALL
MYR Group
MYRG
$5.15B
| $72K | ﹤0.01% |
800
+798
| +39,900% | +$64.9K |
|
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.