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 | |
|---|---|---|---|---|---|---|
1776
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $2.75M | ﹤0.01% |
39,341
+36,316
| +1,201% | +$2.54M |
|
1777
CALL
FIVE9
FIVN
$1.77B
| $2.75M | ﹤0.01% |
15,000
+14,872
| +11,619% | +$2.56M |
|
1778
CALL
BILL Holdings
BILL
$4.33B
| $2.75M | ﹤0.01% |
15,000
+14,645
| +4,125% | +$2.3M |
|
1779
CALL
Lumentum
LITE
$59.4B
| $2.74M | ﹤0.01% |
33,400
+32,801
| +5,476% | +$2.76M |
|
1780
CALL
Arbor Realty Trust
ABR
$960M
| $2.74M | ﹤0.01% |
153,600
+153,109
| +31,183% | +$2.69M |
|
1781
PUT
Cencora
COR
$60.3B
| $2.74M | ﹤0.01% |
23,900
+23,616
| +8,315% | +$2.79M |
|
1782
CALL
Campbell Soup
CPB
$6.51B
| $2.73M | ﹤0.01% |
59,900
+59,740
| +37,338% | +$2.88M |
|
1783
Phillips 66
PSX
$82.9B
| $2.73M | ﹤0.01% |
31,814
-8,143
| -20% | -$687K |
|
1784
State Street SPDR S&P Metals & Mining ETF
XME
$4.05B
| $2.73M | ﹤0.01% |
63,415
-15,094
| -19% | -$656K |
|
1785
US Foods
USFD
$21.4B
| $2.73M | ﹤0.01% |
71,155
+57,378
| +416% | +$2.23M |
|
1786
CALL
Ventas
VTR
$48.9B
| $2.72M | ﹤0.01% |
47,700
+46,844
| +5,472% | +$2.62M |
|
1787
PUT
Cheesecake Factory
CAKE
$4.21B
| $2.71M | ﹤0.01% |
50,100
+49,580
| +9,535% | +$2.87M |
|
1788
CALL
Lamar Advertising Co
LAMR
$16.2B
| $2.71M | ﹤0.01% |
26,000
+25,563
| +5,850% | +$2.6M |
|
|
CDK
1789
PUT
DELISTED
CDK Global, Inc.
CDK
| $2.71M | ﹤0.01% |
54,600
+54,359
| +22,556% | +$2.88M |
|
1790
CALL
BJs Wholesale Club
BJ
$11.9B
| $2.71M | ﹤0.01% |
57,000
+56,133
| +6,474% | +$2.57M |
|
1791
PUT
Acuity Brands
AYI
$9.88B
| $2.71M | ﹤0.01% |
14,500
+14,453
| +30,751% | +$2.63M |
|
1792
PUT
Corning
GLW
$126B
| $2.71M | ﹤0.01% |
66,200
+65,748
| +14,546% | +$2.87M |
|
1793
Nutrien
NTR
$32.7B
| $2.7M | ﹤0.01% |
44,557
+33,737
| +312% | +$2M |
|
1794
PUT
Canadian Solar
CSIQ
$906M
| $2.7M | ﹤0.01% |
+60,200
| New | +$2.46M |
|
1795
PUT
Enbridge
ENB
$124B
| $2.7M | ﹤0.01% |
67,400
+66,682
| +9,287% | +$2.58M |
|
|
EXPR
1796
PUT
DELISTED
Express, Inc.
EXPR
| $2.69M | ﹤0.01% |
+20,760
| New | +$1.75M |
|
1797
CALL
International Flavors & Fragrances
IFF
$19.4B
| $2.69M | ﹤0.01% |
18,000
+17,728
| +6,518% | +$2.54M |
|
|
NVO
1798
CALL
Novo Nordisk
NVO
$216B
| $2.69M | ﹤0.01% |
64,200
+63,496
| +9,019% | +$2.46M |
|
|
FUV
1799
CALL
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $2.69M | ﹤0.01% |
7,820
+7,803
| +45,900% | +$1.8M |
|
1800
PUT
LyondellBasell Industries
LYB
$19.5B
| $2.68M | ﹤0.01% |
26,100
+25,913
| +13,857% | +$2.81M |
|
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.