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 | |
|---|---|---|---|---|---|---|
5101
CALL
Edgewell Personal Care
EPC
$1.26B
| $280K | ﹤0.01% |
6,400
+5,474
| +591% | +$232K |
|
5102
PUT
Genesis Energy
GEL
$1.87B
| $280K | ﹤0.01% |
24,200
+23,771
| +5,541% | +$240K |
|
5103
PUT
Jacobs Solutions
J
$15.7B
| $280K | ﹤0.01% |
2,539
+2,498
| +6,093% | +$282K |
|
5104
CALL
Steven Madden
SHOO
$3.5B
| $280K | ﹤0.01% |
6,400
+6,296
| +6,054% | +$260K |
|
5105
CALL
Sportsman's Warehouse
SPWH
$45.3M
| $280K | ﹤0.01% |
+15,800
| New | +$279K |
|
5106
CALL
Beyond Air
XAIR
$3.91M
| $280K | ﹤0.01% |
+108
| New | +$236K |
|
|
LL
5107
DELISTED
LL Flooring Holdings, Inc.
LL
| $280K | ﹤0.01% |
13,317
-24,907
| -65% | -$586K |
|
5108
Advantage Solutions
ADV
$540M
| $279K | ﹤0.01% |
+1,038
| New | +$320K |
|
5109
PUT
US Global Investors
GROW
$35.8M
| $279K | ﹤0.01% |
45,200
+44,858
| +13,116% | +$320K |
|
5110
PUT
Ironwood Pharmaceuticals
IRWD
$614M
| $279K | ﹤0.01% |
21,700
+21,307
| +5,422% | +$244K |
|
5111
Vanguard Morningstar Mega Cap Growth ETF
MGK
$32.1B
| $279K | ﹤0.01% |
6,040
+3,175
| +111% | +$140K |
|
5112
PUT
Old Dominion Freight Line
ODFL
$44.2B
| $279K | ﹤0.01% |
2,200
+2,156
| +4,900% | +$276K |
|
5113
US Physical Therapy
USPH
$1.22B
| $279K | ﹤0.01% |
+2,410
| New | +$277K |
|
5114
CALL
Wolverine World Wide
WWW
$1.64B
| $279K | ﹤0.01% |
+8,300
| New | +$314K |
|
|
PDCO
5115
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $279K | ﹤0.01% |
9,200
+9,165
| +26,186% | +$309K |
|
|
DMTK
5116
DELISTED
DermTech, Inc. Common Stock
DMTK
| $279K | ﹤0.01% |
6,717
+3,614
| +116% | +$148K |
|
5117
Curis
CRIS
$9.67M
| $278K | ﹤0.01% |
86
-212
| -71% | -$958K |
|
5118
CALL
Alliant Energy
LNT
$18.3B
| $278K | ﹤0.01% |
5,000
+4,895
| +4,662% | +$277K |
|
5119
Main Street Capital
MAIN
$5.06B
| $278K | ﹤0.01% |
+6,783
| New | +$282K |
|
5120
CALL
Molina Healthcare
MOH
$10.2B
| $278K | ﹤0.01% |
1,100
+1,082
| +6,011% | +$272K |
|
|
RDUS
5121
DELISTED
Radius Recycling
RDUS
| $278K | ﹤0.01% |
5,681
+980
| +21% | +$48.7K |
|
5122
PUT
Utz Brands
UTZ
$1.25B
| $278K | ﹤0.01% |
12,800
+12,678
| +10,392% | +$317K |
|
|
VVNT
5123
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
| $278K | ﹤0.01% |
21,112
+16,787
| +388% | +$225K |
|
|
MCFE
5124
DELISTED
McAfee Corp. Class A Common Stock
MCFE
| $278K | ﹤0.01% |
9,929
-56,948
| -85% | -$1.46M |
|
5125
CALL
Costamare
CMRE
$1.87B
| $277K | ﹤0.01% |
+23,500
| New | +$253K |
|
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.