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 | |
|---|---|---|---|---|---|---|
5701
CALL
Ovid Therapeutics
OVID
$414M
| $197K | ﹤0.01% |
50,400
+50,111
| +17,339% | +$198K |
|
5702
ProShares UltraShort Financials
SKF
$10.3M
| $197K | ﹤0.01% |
2,436
+2,244
| +1,169% | +$189K |
|
5703
TTEC Holdings
TTEC
$121M
| $197K | ﹤0.01% |
1,917
+387
| +25% | +$40.2K |
|
5704
CALL
Viper Energy
VNOM
$8.71B
| $197K | ﹤0.01% |
10,500
+10,117
| +2,642% | +$181K |
|
|
BCPC
5705
Balchem Corp
BCPC
$5.38B
| $197K | ﹤0.01% |
1,501
+335
| +29% | +$43.1K |
|
|
SOLO
5706
PUT
DELISTED
Electrameccanica Vehicles Corp. Ltd.
SOLO
| $197K | ﹤0.01% |
46,200
+45,767
| +10,570% | +$188K |
|
|
PBCT
5707
CALL
DELISTED
People's United Financial Inc
PBCT
| $197K | ﹤0.01% |
11,500
+11,290
| +5,376% | +$206K |
|
5708
PUT
Altimmune
ALT
$552M
| $196K | ﹤0.01% |
19,900
+19,758
| +13,914% | +$270K |
|
|
MIME
5709
CALL
DELISTED
Mimecast Limited
MIME
| $196K | ﹤0.01% |
3,700
+3,641
| +6,171% | +$171K |
|
|
FOE
5710
CALL
DELISTED
Ferro Corporation
FOE
| $196K | ﹤0.01% |
9,100
+8,771
| +2,666% | +$172K |
|
5711
Churchill Downs
CHDN
$5.88B
| $195K | ﹤0.01% |
1,976
+1,350
| +216% | +$139K |
|
5712
PUT
Equinor
EQNR
$97.7B
| $195K | ﹤0.01% |
9,200
+9,025
| +5,157% | +$190K |
|
5713
Vertex
VERX
$2.09B
| $195K | ﹤0.01% |
+8,902
| New | +$181K |
|
5714
CALL
Worthington Enterprises
WOR
$2.75B
| $195K | ﹤0.01% |
5,190
+5,172
| +28,733% | +$209K |
|
|
GATO
5715
CALL
DELISTED
Gatos Silver, Inc.
GATO
| $195K | ﹤0.01% |
+11,200
| New | +$158K |
|
|
CURO
5716
CALL
DELISTED
CURO Group Holdings Corp.
CURO
| $195K | ﹤0.01% |
11,500
+11,439
| +18,752% | +$178K |
|
|
DCH
5717
Dauch Corp
DCH
$1.34B
| $194K | ﹤0.01% |
18,801
-10,856
| -37% | -$114K |
|
5718
CALL
Eterna Therapeutics
ERNA
$3.83M
| $194K | ﹤0.01% |
+1
| New | +$144K |
|
|
OTLY
5719
Oatly Group
OTLY
$465M
| $194K | ﹤0.01% |
+397
| New | +$197K |
|
5720
PUT
United States 12 Month Oil Fund,
USL
$45.1M
| $194K | ﹤0.01% |
7,600
+7,527
| +10,311% | +$175K |
|
|
MTEM
5721
CALL
DELISTED
Molecular Templates, Inc.
MTEM
| $194K | ﹤0.01% |
1,660
+1,654
| +27,567% | +$216K |
|
5722
CALL
Aprea Therapeutics
APRE
$7.68M
| $193K | ﹤0.01% |
+1,985
| New | +$183K |
|
5723
PUT
Aterian
ATER
$4.45M
| $193K | ﹤0.01% |
1,100
+1,073
| +3,974% | +$251K |
|
5724
CALL
Credicorp
BAP
$31.8B
| $193K | ﹤0.01% |
1,600
+1,598
| +79,900% | +$209K |
|
5725
CALL
Bio-Rad Laboratories Class A
BIO
$8.71B
| $193K | ﹤0.01% |
300
+292
| +3,650% | +$178K |
|
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.