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 | |
|---|---|---|---|---|---|---|
1001
CALL
Howard Hughes
HHH
$3.92B
| $6.26M | 0.01% |
67,346
+67,258
| +76,430% | +$6.66M |
|
1002
PUT
International Paper
IP
$20.1B
| $6.25M | 0.01% |
107,712
+107,176
| +19,996% | +$6.12M |
|
1003
PUT
Tapestry
TPR
$28.1B
| $6.21M | 0.01% |
+142,900
| New | +$6.38M |
|
1004
CALL
HSBC
HSBC
$349B
| $6.21M | 0.01% |
215,300
+213,684
| +13,223% | +$6.53M |
|
1005
CALL
STMicroelectronics
STM
$47.7B
| $6.2M | 0.01% |
170,400
+168,714
| +10,007% | +$6.31M |
|
1006
CALL
Kinder Morgan
KMI
$72.9B
| $6.19M | 0.01% |
+339,500
| New | +$6.05M |
|
1007
CALL
Infosys
INFY
$43.2B
| $6.18M | 0.01% |
291,600
+288,472
| +9,222% | +$5.51M |
|
|
EXAS
1008
PUT
DELISTED
Exact Sciences
EXAS
| $6.18M | 0.01% |
49,700
+49,383
| +15,578% | +$5.89M |
|
|
WBA
1009
DELISTED
Walgreens Boots Alliance
WBA
| $6.17M | 0.01% |
117,340
+12,096
| +11% | +$651K |
|
1010
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.35B
| $6.16M | 0.01% |
62,877
-2,583
| -4% | -$241K |
|
1011
CALL
InMode
INMD
$867M
| $6.15M | 0.01% |
130,000
+129,046
| +13,527% | +$5.48M |
|
1012
PUT
MasTec
MTZ
$28.4B
| $6.15M | 0.01% |
58,000
+57,756
| +23,670% | +$6.27M |
|
1013
Marathon Petroleum
MPC
$91.2B
| $6.15M | 0.01% |
+101,833
| New | +$5.97M |
|
1014
CALL
Clean Energy Fuels
CLNE
$460M
| $6.15M | 0.01% |
+605,800
| New | +$6.25M |
|
1015
PUT
Sonos
SONO
$1.73B
| $6.13M | 0.01% |
174,000
+171,335
| +6,429% | +$6.41M |
|
1016
PUT
OneMain Financial
OMF
$6.79B
| $6.12M | 0.01% |
+102,100
| New | +$5.78M |
|
1017
PUT
Energy Transfer Partners
ET
$70.3B
| $6.1M | 0.01% |
+574,300
| New | +$5.5M |
|
1018
CALL
RingCentral
RNG
$3.24B
| $6.1M | 0.01% |
21,000
+20,846
| +13,536% | +$5.95M |
|
1019
PUT
Equinix
EQIX
$102B
| $6.1M | 0.01% |
7,600
+7,483
| +6,396% | +$5.56M |
|
1020
CALL
Take-Two Interactive
TTWO
$42.7B
| $6.09M | 0.01% |
+34,400
| New | +$6.11M |
|
1021
PUT
Editas Medicine
EDIT
$419M
| $6.09M | 0.01% |
+107,500
| New | +$3.97M |
|
|
SPR
1022
PUT
DELISTED
Spirit AeroSystems
SPR
| $6.08M | 0.01% |
128,800
+127,997
| +15,940% | +$6.06M |
|
1023
CALL
Synopsys
SNPS
$71.5B
| $6.07M | 0.01% |
22,000
+21,727
| +7,959% | +$5.51M |
|
1024
PUT
Bunge Global
BG
$23.7B
| $6.05M | 0.01% |
77,400
+77,042
| +21,520% | +$6.5M |
|
1025
CALL
Genuine Parts
GPC
$16.6B
| $6.04M | 0.01% |
47,800
+47,345
| +10,405% | +$5.96M |
|
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.