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 | |
|---|---|---|---|---|---|---|
1851
CALL
Procure Space ETF
UFO
$620M
| $2.56M | ﹤0.01% |
+82,500
| New | +$2.46M |
|
1852
PUT
Cognizant
CTSH
$21.5B
| $2.56M | ﹤0.01% |
37,000
+36,833
| +22,056% | +$2.74M |
|
1853
PUT
Arbor Realty Trust
ABR
$960M
| $2.56M | ﹤0.01% |
143,600
+142,179
| +10,006% | +$2.5M |
|
1854
CALL
Banco Macro
BMA
$5.7B
| $2.56M | ﹤0.01% |
170,200
+169,742
| +37,062% | +$2.53M |
|
|
SPWR
1855
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $2.56M | ﹤0.01% |
90,100
+88,837
| +7,034% | +$2.29M |
|
|
DQ
1856
Daqo New Energy
DQ
$790M
| $2.55M | ﹤0.01% |
39,286
+25,854
| +192% | +$1.86M |
|
1857
CALL
Bruker
BRKR
$9.2B
| $2.55M | ﹤0.01% |
33,600
+33,563
| +90,711% | +$2.34M |
|
1858
CALL
GoPro
GPRO
$116M
| $2.55M | ﹤0.01% |
+218,900
| New | +$2.47M |
|
1859
CALL
Lithia Motors
LAD
$7.78B
| $2.54M | ﹤0.01% |
7,400
+7,353
| +15,645% | +$2.66M |
|
1860
CALL
Sarepta Therapeutics
SRPT
$1.66B
| $2.54M | ﹤0.01% |
+32,700
| New | +$2.48M |
|
|
BRSL
1861
CALL
Brightstar Lottery PLC
BRSL
$1.91B
| $2.54M | ﹤0.01% |
106,000
+105,574
| +24,783% | +$2.21M |
|
|
BAND
1862
CALL
Bandwidth Inc
BAND
$1.91B
| $2.54M | ﹤0.01% |
18,400
+18,235
| +11,052% | +$2.29M |
|
|
NKLA
1863
DELISTED
Nikola Corporation Common Stock
NKLA
| $2.53M | ﹤0.01% |
4,677
-153
| -3% | -$63.7K |
|
1864
CALL
Domo
DOMO
$166M
| $2.53M | ﹤0.01% |
31,300
+30,829
| +6,545% | +$2.02M |
|
1865
AngloGold Ashanti
AU
$40.3B
| $2.53M | ﹤0.01% |
136,053
-31,601
| -19% | -$695K |
|
|
ZUO
1866
CALL
DELISTED
Zuora, Inc.
ZUO
| $2.53M | ﹤0.01% |
146,500
+145,416
| +13,415% | +$2.32M |
|
1867
Cummins
CMI
$91.7B
| $2.52M | ﹤0.01% |
10,347
+1,447
| +16% | +$370K |
|
1868
PUT
Kimbell Royalty Partners
KRP
$1.47B
| $2.52M | ﹤0.01% |
196,300
+194,404
| +10,253% | +$2.32M |
|
|
TTCF
1869
CALL
DELISTED
Tattooed Chef, Inc Class A Common Stock
TTCF
| $2.52M | ﹤0.01% |
117,600
+115,842
| +6,589% | +$2.27M |
|
|
BLDP
1870
PUT
Ballard Power Systems
BLDP
$874M
| $2.52M | ﹤0.01% |
139,100
+138,484
| +22,481% | +$2.57M |
|
1871
PUT
Academy Sports + Outdoors
ASO
$2.89B
| $2.52M | ﹤0.01% |
61,100
+60,548
| +10,969% | +$2.12M |
|
1872
PUT
F5
FFIV
$22.1B
| $2.52M | ﹤0.01% |
13,500
+13,252
| +5,344% | +$2.55M |
|
1873
CALL
Schrodinger
SDGR
$1.12B
| $2.52M | ﹤0.01% |
33,300
+32,971
| +10,022% | +$2.39M |
|
1874
PUT
Yeti Holdings
YETI
$3.82B
| $2.52M | ﹤0.01% |
27,400
+27,271
| +21,140% | +$2.37M |
|
1875
NetEase
NTES
$76.5B
| $2.51M | ﹤0.01% |
21,821
-13,229
| -38% | -$1.46M |
|
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.