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 | |
|---|---|---|---|---|---|---|
2326
PUT
KeyCorp
KEY
$24.3B
| $1.76M | ﹤0.01% |
+85,500
| New | +$1.86M |
|
|
AZUL
2327
PUT
DELISTED
Azul
AZUL
| $1.76M | ﹤0.01% |
66,800
+66,639
| +41,391% | +$1.59M |
|
2328
iShares MSCI Japan ETF
EWJ
$21.7B
| $1.76M | ﹤0.01% |
+26,097
| New | +$1.79M |
|
2329
PUT
WEC Energy
WEC
$37.7B
| $1.76M | ﹤0.01% |
19,800
+19,599
| +9,751% | +$1.85M |
|
|
MPT
2330
PUT
Medical Properties Trust
MPT
$2.89B
| $1.76M | ﹤0.01% |
87,600
+87,408
| +45,525% | +$1.87M |
|
|
LAC
2331
CALL
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $1.76M | ﹤0.01% |
118,400
+117,753
| +18,200% | +$1.68M |
|
2332
CALL
Qiagen
QGEN
$8.53B
| $1.76M | ﹤0.01% |
34,233
+34,142
| +37,519% | +$1.76M |
|
|
PLCY
2333
CALL
DELISTED
EventShares U.S. Legislative Opportunities ETF
PLCY
| $1.76M | ﹤0.01% |
65,100
+64,736
| +17,785% | +$1.75M |
|
2334
PUT
Gen Digital
GEN
$15.6B
| $1.75M | ﹤0.01% |
64,500
+63,468
| +6,150% | +$1.58M |
|
|
PTRA
2335
CALL
DELISTED
Proterra Inc. Common Stock
PTRA
| $1.75M | ﹤0.01% |
102,600
+101,836
| +13,329% | +$1.71M |
|
|
PINC
2336
PUT
DELISTED
Premier
PINC
| $1.75M | ﹤0.01% |
50,400
+50,297
| +48,832% | +$1.74M |
|
|
SUP
2337
PUT
DELISTED
Superior Industries International
SUP
| $1.75M | ﹤0.01% |
203,100
+202,657
| +45,747% | +$1.39M |
|
|
TELL
2338
DELISTED
Tellurian Inc.
TELL
| $1.75M | ﹤0.01% |
376,354
-8,236
| -2% | -$25.3K |
|
2339
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $1.75M | ﹤0.01% |
22,100
+22,021
| +27,875% | +$1.76M |
|
2340
CALL
Outdoor Holding Co
POWW
$239M
| $1.75M | ﹤0.01% |
178,600
+178,184
| +42,833% | +$1.27M |
|
2341
PUT
Momentus
MNTS
$88.7M
| $1.75M | ﹤0.01% |
+10
| New | +$1.46M |
|
2342
CALL
Moelis & Co
MC
$4.98B
| $1.75M | ﹤0.01% |
30,700
+30,689
| +278,991% | +$1.67M |
|
|
SWN
2343
PUT
DELISTED
Southwestern Energy Company
SWN
| $1.75M | ﹤0.01% |
308,000
+307,287
| +43,098% | +$1.51M |
|
|
ALTU
2344
PUT
DELISTED
Altitude Acquisition Corp
ALTU
| $1.75M | ﹤0.01% |
178,400
+176,191
| +7,976% | +$1.74M |
|
2345
Lowe's Companies
LOW
$116B
| $1.74M | ﹤0.01% |
8,988
+4,958
| +123% | +$970K |
|
2346
PUT
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $1.74M | ﹤0.01% |
17,800
+17,788
| +148,233% | +$1.77M |
|
|
VSTO
2347
PUT
DELISTED
Vista Outdoor Inc.
VSTO
| $1.74M | ﹤0.01% |
+37,600
| New | +$1.42M |
|
2348
PUT
PagerDuty
PD
$700M
| $1.74M | ﹤0.01% |
40,800
+40,695
| +38,757% | +$1.65M |
|
2349
PUT
Omnicom Group
OMC
$22.7B
| $1.74M | ﹤0.01% |
21,700
+21,447
| +8,477% | +$1.74M |
|
|
PLL
2350
CALL
DELISTED
Piedmont Lithium
PLL
| $1.74M | ﹤0.01% |
+22,200
| New | +$1.51M |
|
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.