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 | |
|---|---|---|---|---|---|---|
7176
PUT
Rockwell Medical
RMTI
$28M
| $72K | ﹤0.01% |
721
+720
| +72,000% | +$74.3K |
|
7177
PUT
TETRA Technologies
TTI
$1.13B
| $72K | ﹤0.01% |
16,800
+14,428
| +608% | +$47.5K |
|
7178
PUT
W&T Offshore
WTI
$515M
| $72K | ﹤0.01% |
+14,900
| New | +$57.5K |
|
|
ISEE
7179
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $72K | ﹤0.01% |
+11,439
| New | +$73.8K |
|
|
CNCE
7180
DELISTED
Concert Pharmaceuticals, Inc.
CNCE
| $72K | ﹤0.01% |
17,288
+6,176
| +56% | +$26.1K |
|
|
CVET
7181
PUT
DELISTED
Covetrus, Inc. Common Stock
CVET
| $72K | ﹤0.01% |
2,700
+2,476
| +1,105% | +$69.3K |
|
|
MTOR
7182
CALL
DELISTED
MERITOR, Inc.
MTOR
| $72K | ﹤0.01% |
3,100
+3,001
| +3,031% | +$78.9K |
|
|
CORE
7183
PUT
DELISTED
Core Mark Holding Co., Inc.
CORE
| $72K | ﹤0.01% |
+1,600
| New | +$70.3K |
|
7184
PUT
Applied Optoelectronics
AAOI
$7.23B
| $71K | ﹤0.01% |
8,500
+8,386
| +7,356% | +$68.3K |
|
7185
Aecom
ACM
$9.22B
| $71K | ﹤0.01% |
1,123
-9,268
| -89% | -$606K |
|
7186
CALL
Enovix
ENVX
$912M
| $71K | ﹤0.01% |
20,229
+20,092
| +14,666% | +$273K |
|
7187
PUT
East-West Bancorp
EWBC
$17.9B
| $71K | ﹤0.01% |
1,000
+940
| +1,567% | +$69.9K |
|
7188
Franklin Covey
FC
$243M
| $71K | ﹤0.01% |
2,212
+125
| +6% | +$3.85K |
|
7189
CALL
Koppers
KOP
$942M
| $71K | ﹤0.01% |
2,200
+2,194
| +36,567% | +$74K |
|
7190
Liberty Latin America Class C
LILAK
$1.61B
| $71K | ﹤0.01% |
5,559
-34,845
| -86% | -$447K |
|
7191
PUT
Grand Canyon Education
LOPE
$3.98B
| $71K | ﹤0.01% |
+800
| New | +$79.1K |
|
7192
PUT
Liquidia Corp
LQDA
$7.72B
| $71K | ﹤0.01% |
24,900
+24,687
| +11,590% | +$68.4K |
|
7193
PUT
NETSCOUT
NTCT
$2.91B
| $71K | ﹤0.01% |
2,500
+2,477
| +10,770% | +$70.4K |
|
7194
Direxion Daily Technology Bear 3x ETF
TECS
$69.3M
| $71K | ﹤0.01% |
14
-5
| -26% | -$30.8K |
|
7195
Energous
WATT
$77.2M
| $71K | ﹤0.01% |
+42
| New | +$76.2K |
|
|
TVRD
7196
PUT
Tvardi Therapeutics
TVRD
$19.7M
| $71K | ﹤0.01% |
139
+131
| +1,638% | +$83K |
|
|
SQSP
7197
CALL
DELISTED
Squarespace, Inc.
SQSP
| $71K | ﹤0.01% |
+1,200
| New | +$68.4K |
|
|
SCPL
7198
PUT
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $71K | ﹤0.01% |
4,200
+3,863
| +1,146% | +$66.5K |
|
|
AIMC
7199
CALL
DELISTED
Altra Industrial Motion Corp
AIMC
| $71K | ﹤0.01% |
1,100
+1,088
| +9,067% | +$69.2K |
|
7200
Arcturus Therapeutics
ARCT
$168M
| $70K | ﹤0.01% |
2,075
-7,460
| -78% | -$253K |
|
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.