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 | |
|---|---|---|---|---|---|---|
|
QNGY
4501
PUT
DELISTED
Quanergy Systems, Inc.
QNGY
| $402K | ﹤0.01% |
2,030
+1,893
| +1,382% | +$377K |
|
4502
Emergent Biosolutions
EBS
$379M
| $401K | ﹤0.01% |
6,367
+4,761
| +296% | +$306K |
|
4503
PUT
Intrepid Potash
IPI
$476M
| $401K | ﹤0.01% |
12,600
+12,588
| +104,900% | +$371K |
|
4504
Ocular Therapeutix
OCUL
$1.83B
| $401K | ﹤0.01% |
28,301
-5,549
| -16% | -$84.4K |
|
4505
PUT
Outfront Media
OUT
$5.75B
| $401K | ﹤0.01% |
16,967
+16,874
| +18,144% | +$391K |
|
|
TEF
4506
DELISTED
Telefonica
TEF
| $401K | ﹤0.01% |
91,475
+23,031
| +34% | +$99.7K |
|
4507
PUT
Western Union
WU
$2.53B
| $401K | ﹤0.01% |
17,500
+17,249
| +6,872% | +$429K |
|
|
GRMN
4508
Garmin
GRMN
$56.9B
| $400K | ﹤0.01% |
2,771
-1,942
| -41% | -$273K |
|
4509
PUT
Ovintiv
OVV
$17B
| $400K | ﹤0.01% |
12,740
+11,557
| +977% | +$310K |
|
|
Y
4510
PUT
DELISTED
Alleghany Corp
Y
| $400K | ﹤0.01% |
600
+598
| +29,900% | +$411K |
|
4511
PUT
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $399K | ﹤0.01% |
17,400
+15,690
| +918% | +$923K |
|
4512
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$49.4B
| $399K | ﹤0.01% |
6,348
+1,922
| +43% | +$115K |
|
|
CSPR
4513
CALL
DELISTED
Casper Sleep Inc.
CSPR
| $399K | ﹤0.01% |
48,500
+47,670
| +5,743% | +$416K |
|
|
TRQ
4514
PUT
DELISTED
Turquoise Hill Resources Ltd
TRQ
| $399K | ﹤0.01% |
23,660
+23,138
| +4,433% | +$410K |
|
4515
PUT
UGI
UGI
$7.87B
| $398K | ﹤0.01% |
8,600
+8,361
| +3,498% | +$376K |
|
4516
PUT
American Resources Corp
AREC
$183M
| $397K | ﹤0.01% |
+155,800
| New | +$471K |
|
4517
PUT
Eagle Materials
EXP
$6.49B
| $397K | ﹤0.01% |
2,800
+2,750
| +5,500% | +$395K |
|
|
VGR
4518
CALL
DELISTED
Vector Group Ltd.
VGR
| $397K | ﹤0.01% |
39,621
+39,531
| +43,923% | +$394K |
|
|
FUV
4519
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $397K | ﹤0.01% |
1,155
-1,928
| -63% | -$445K |
|
4520
PUT
JFrog
FROG
$8.88B
| $396K | ﹤0.01% |
8,700
+8,515
| +4,603% | +$383K |
|
4521
CALL
SCYNEXIS
SCYX
$37.4M
| $396K | ﹤0.01% |
6,738
+6,731
| +96,157% | +$425K |
|
|
WOW
4522
DELISTED
WideOpenWest
WOW
| $396K | ﹤0.01% |
19,137
+12,731
| +199% | +$200K |
|
4523
CALL
Antero Midstream
AM
$10.2B
| $395K | ﹤0.01% |
38,100
+37,881
| +17,297% | +$362K |
|
|
ECHO
4524
PUT
EchoStar
ECHO
$24.3B
| $395K | ﹤0.01% |
16,300
+15,987
| +5,108% | +$410K |
|
4525
CALL
Teekay Tankers
TNK
$2.71B
| $395K | ﹤0.01% |
27,400
+27,112
| +9,414% | +$388K |
|
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.