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 | |
|---|---|---|---|---|---|---|
1876
PUT
ICICI Bank
IBN
$106B
| $2.51M | ﹤0.01% |
+147,000
| New | +$2.45M |
|
|
XONE
1877
CALL
DELISTED
The ExOne Company
XONE
| $2.51M | ﹤0.01% |
+116,100
| New | +$2.64M |
|
1878
PUT
Clarivate
CLVT
$1.3B
| $2.51M | ﹤0.01% |
91,200
+91,156
| +207,173% | +$2.51M |
|
|
RAPT
1879
PUT
DELISTED
RAPT Therapeutics
RAPT
| $2.51M | ﹤0.01% |
9,863
+9,857
| +164,283% | +$1.84M |
|
1880
CALL
RLX Technology
RLX
$2.48B
| $2.51M | ﹤0.01% |
287,100
+284,653
| +11,633% | +$2.91M |
|
1881
CALL
New York Times
NYT
$11.6B
| $2.5M | ﹤0.01% |
57,500
+57,091
| +13,959% | +$2.54M |
|
|
TWOU
1882
CALL
DELISTED
2U Inc
TWOU
| $2.5M | ﹤0.01% |
1,997
+1,991
| +33,183% | +$2.3M |
|
1883
PUT
Ericsson
ERIC
$30.7B
| $2.49M | ﹤0.01% |
198,300
+196,903
| +14,095% | +$2.64M |
|
1884
Incyte
INCY
$23.5B
| $2.49M | ﹤0.01% |
29,647
+12,644
| +74% | +$1.05M |
|
1885
CALL
Commault Systems
CVLT
$5.89B
| $2.49M | ﹤0.01% |
31,900
+31,875
| +127,500% | +$2.32M |
|
1886
CALL
iShares Gold Trust
IAU
$63B
| $2.49M | ﹤0.01% |
74,000
+73,752
| +29,739% | +$2.55M |
|
1887
PUT
Amplify Online Retail ETF
IBUY
$106M
| $2.49M | ﹤0.01% |
51,600
+51,078
| +9,785% | +$6.29M |
|
1888
CALL
Ziff Davis
ZD
$1.9B
| $2.49M | ﹤0.01% |
20,815
+20,599
| +9,537% | +$2.26M |
|
|
KYNB
1889
Kyntra Bio
KYNB
$28.5M
| $2.48M | ﹤0.01% |
+3,730
| New | +$2.15M |
|
|
KRA
1890
CALL
DELISTED
Kraton Corporation
KRA
| $2.48M | ﹤0.01% |
76,800
+76,736
| +119,900% | +$2.71M |
|
1891
Canadian Natural Resources
CNQ
$96.9B
| $2.48M | ﹤0.01% |
139,477
+89,452
| +179% | +$1.47M |
|
1892
CALL
Crown Holdings
CCK
$12.8B
| $2.47M | ﹤0.01% |
24,200
+23,936
| +9,067% | +$2.52M |
|
|
DNMR
1893
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $2.47M | ﹤0.01% |
2,468
+2,447
| +11,652% | +$2.44M |
|
1894
PUT
Kinder Morgan
KMI
$73.1B
| $2.47M | ﹤0.01% |
+135,500
| New | +$2.42M |
|
|
FSR
1895
PUT
DELISTED
Fisker Inc.
FSR
| $2.47M | ﹤0.01% |
128,000
+126,347
| +7,643% | +$1.87M |
|
1896
CALL
HDFC Bank
HDB
$119B
| $2.46M | ﹤0.01% |
67,400
+65,206
| +2,972% | +$2.39M |
|
|
IPOD
1897
PUT
DELISTED
Social Capital Hedosophia Holdings Corp. IV
IPOD
| $2.46M | ﹤0.01% |
236,900
+234,825
| +11,317% | +$2.49M |
|
1898
Melco Resorts & Entertainment
MLCO
$2.1B
| $2.46M | ﹤0.01% |
148,481
-30,125
| -17% | -$546K |
|
1899
PUT
TE Connectivity
TEL
$58.8B
| $2.46M | ﹤0.01% |
18,200
+17,991
| +8,608% | +$2.41M |
|
1900
CALL
Ameren
AEE
$31.5B
| $2.46M | ﹤0.01% |
30,700
+30,664
| +85,178% | +$2.57M |
|
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.