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 | |
|---|---|---|---|---|---|---|
2126
XPO
XPO
$25B
| $2.05M | ﹤0.01% |
42,368
-4,843
| -10% | -$237K |
|
2127
CALL
Skillsoft
SKIL
$56.9M
| $2.05M | ﹤0.01% |
10,400
+10,253
| +6,975% | +$2.06M |
|
2128
Trip.com Group
TCOM
$27.5B
| $2.05M | ﹤0.01% |
57,730
+26,519
| +85% | +$1.01M |
|
2129
Playboy Inc
PLBY
$141M
| $2.04M | ﹤0.01% |
52,468
+9,758
| +23% | +$411K |
|
|
SEE
2130
CALL
DELISTED
Sealed Air
SEE
| $2.04M | ﹤0.01% |
34,400
+34,010
| +8,721% | +$1.83M |
|
|
TEN
2131
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $2.04M | ﹤0.01% |
105,527
+40,597
| +63% | +$608K |
|
|
ESPR
2132
CALL
DELISTED
Esperion Therapeutics
ESPR
| $2.03M | ﹤0.01% |
96,200
+95,977
| +43,039% | +$2.31M |
|
|
PDCE
2133
PUT
DELISTED
PDC Energy, Inc.
PDCE
| $2.03M | ﹤0.01% |
+44,400
| New | +$1.81M |
|
2134
CALL
Williams Companies
WMB
$90.5B
| $2.03M | ﹤0.01% |
76,400
+75,582
| +9,240% | +$1.94M |
|
|
EAR
2135
CALL
DELISTED
Eargo, Inc. Common Stock
EAR
| $2.03M | ﹤0.01% |
+2,540
| New | +$2.13M |
|
2136
PUT
Coty
COTY
$2.33B
| $2.02M | ﹤0.01% |
216,900
+213,470
| +6,224% | +$1.94M |
|
|
BTAQ
2137
PUT
DELISTED
Burgundy Technology Acquisition Corporation Class A Ordinary shares
BTAQ
| $2.02M | ﹤0.01% |
205,600
+204,585
| +20,156% | +$2.03M |
|
2138
PUT
Fluor
FLR
$7.29B
| $2.02M | ﹤0.01% |
114,300
+112,589
| +6,580% | +$2.32M |
|
2139
CALL
Carrier Global
CARR
$57.2B
| $2.02M | ﹤0.01% |
41,600
+41,027
| +7,160% | +$1.83M |
|
2140
UWM Holdings
UWMC
$621M
| $2.02M | ﹤0.01% |
239,196
+91,124
| +62% | +$763K |
|
2141
Rio Tinto
RIO
$148B
| $2.02M | ﹤0.01% |
+24,060
| New | +$2.07M |
|
|
PPL
2142
CALL
PPL Corp
PPL
$27.3B
| $2.02M | ﹤0.01% |
72,100
+71,197
| +7,884% | +$2.06M |
|
|
SIX
2143
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $2.02M | ﹤0.01% |
+46,600
| New | +$2.1M |
|
2144
PUT
Consolidated Edison
ED
$41.6B
| $2.02M | ﹤0.01% |
28,100
+27,824
| +10,081% | +$2.14M |
|
2145
Vanguard FTSE Europe ETF
VGK
$30B
| $2.02M | ﹤0.01% |
29,959
-14,173
| -32% | -$957K |
|
|
SBNY
2146
CALL
DELISTED
Signature Bank
SBNY
| $2.01M | ﹤0.01% |
8,200
+7,623
| +1,321% | +$1.85M |
|
2147
PUT
Abits Group
ABTS
$3.38M
| $2.01M | ﹤0.01% |
+6,020
| New | +$955K |
|
2148
CALL
Equifax
EFX
$20.3B
| $2.01M | ﹤0.01% |
8,400
+8,361
| +21,438% | +$1.87M |
|
|
SPCK
2149
The SPAC and New Issue ETF
SPCK
$8.3M
| $2.01M | ﹤0.01% |
68,988
+15,540
| +29% | +$446K |
|
2150
Hartford Financial Services
HIG
$38.5B
| $2.01M | ﹤0.01% |
+32,389
| New | +$2.12M |
|
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.