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 | |
|---|---|---|---|---|---|---|
1226
PUT
HubSpot
HUBS
$10.5B
| $4.78M | ﹤0.01% |
+8,200
| New | +$4.28M |
|
1227
Alcoa
AA
$11.7B
| $4.77M | ﹤0.01% |
129,556
+77,004
| +147% | +$2.8M |
|
1228
CALL
Procore
PCOR
$6.46B
| $4.76M | ﹤0.01% |
+50,100
| New | +$4.39M |
|
|
HUYA
1229
PUT
Huya Inc
HUYA
$542M
| $4.75M | ﹤0.01% |
269,200
+266,610
| +10,294% | +$4.47M |
|
1230
CALL
Itaú Unibanco
ITUB
$91.3B
| $4.75M | ﹤0.01% |
1,086,132
+1,082,287
| +28,148% | +$4.36M |
|
1231
CALL
Open Text
OTEX
$5.43B
| $4.75M | ﹤0.01% |
93,500
+93,478
| +424,900% | +$4.52M |
|
|
IAA
1232
PUT
DELISTED
IAA, Inc. Common Stock
IAA
| $4.74M | ﹤0.01% |
87,000
+85,977
| +8,404% | +$4.94M |
|
1233
PUT
Ball Corp
BALL
$17B
| $4.72M | ﹤0.01% |
58,300
+57,776
| +11,026% | +$5M |
|
1234
CALL
Chubb
CB
$140B
| $4.72M | ﹤0.01% |
+29,700
| New | +$4.92M |
|
|
LEV
1235
PUT
DELISTED
The Lion Electric Company
LEV
| $4.7M | ﹤0.01% |
+241,900
| New | +$4.53M |
|
|
SBNY
1236
DELISTED
Signature Bank
SBNY
| $4.7M | ﹤0.01% |
+19,122
| New | +$4.64M |
|
1237
PUT
KE Holdings
BEKE
$16.8B
| $4.7M | ﹤0.01% |
98,500
+97,107
| +6,971% | +$4.96M |
|
1238
CarMax
KMX
$8.27B
| $4.69M | ﹤0.01% |
36,319
+22,326
| +160% | +$2.76M |
|
1239
Energy Transfer Partners
ET
$70.1B
| $4.68M | ﹤0.01% |
440,311
+161,605
| +58% | +$1.55M |
|
1240
CALL
Exelon
EXC
$48.6B
| $4.67M | ﹤0.01% |
147,771
+145,714
| +7,084% | +$4.69M |
|
1241
CALL
Copart
CPRT
$25.9B
| $4.67M | ﹤0.01% |
141,600
+140,796
| +17,512% | +$4.36M |
|
|
BBBY
1242
CALL
Bed Bath & Beyond
BBBY
$473M
| $4.66M | ﹤0.01% |
55,660
+55,118
| +10,169% | +$4.01M |
|
1243
PUT
Citizens Financial Group
CFG
$30.4B
| $4.66M | ﹤0.01% |
101,600
+101,358
| +41,883% | +$4.78M |
|
1244
CALL
Editas Medicine
EDIT
$399M
| $4.66M | ﹤0.01% |
+82,200
| New | +$3.04M |
|
1245
Cboe Global Markets
CBOE
$29.8B
| $4.65M | ﹤0.01% |
39,043
+6,035
| +18% | +$662K |
|
1246
PUT
New York Times
NYT
$11.6B
| $4.65M | ﹤0.01% |
106,700
+106,173
| +20,147% | +$4.73M |
|
1247
CALL
Progressive
PGR
$124B
| $4.64M | ﹤0.01% |
+47,300
| New | +$4.68M |
|
1248
PUT
Pan American Silver
PAAS
$18.6B
| $4.64M | ﹤0.01% |
162,500
+160,982
| +10,605% | +$5.19M |
|
1249
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $4.64M | ﹤0.01% |
98,700
+97,380
| +7,377% | +$4.1M |
|
1250
CALL
Huntington Ingalls Industries
HII
$11.3B
| $4.64M | ﹤0.01% |
22,000
+21,761
| +9,105% | +$4.63M |
|
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.