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 | |
|---|---|---|---|---|---|---|
1126
PUT
ChargePoint
CHPT
$134M
| $5.34M | 0.01% |
7,680
+7,573
| +7,078% | +$4.01M |
|
1127
CALL
Scotiabank
BNS
$106B
| $5.33M | 0.01% |
82,000
+81,639
| +22,615% | +$5.28M |
|
|
CMRC
1128
PUT
Commerce.com Inc Series 1
CMRC
$219M
| $5.33M | 0.01% |
82,100
+81,354
| +10,905% | +$4.6M |
|
1129
PUT
General Mills
GIS
$19.2B
| $5.33M | 0.01% |
87,400
+86,284
| +7,732% | +$5.34M |
|
1130
PUT
Credit Acceptance
CACC
$5.99B
| $5.31M | 0.01% |
11,700
+11,547
| +7,547% | +$4.74M |
|
1131
CALL
Coherent
COHR
$56.7B
| $5.31M | 0.01% |
73,100
+71,271
| +3,897% | +$5.02M |
|
1132
PUT
American Eagle Outfitters
AEO
$2.89B
| $5.29M | 0.01% |
+141,100
| New | +$4.89M |
|
1133
PUT
Agilent Technologies
A
$39.2B
| $5.29M | 0.01% |
35,800
+35,321
| +7,374% | +$4.82M |
|
|
PARA
1134
DELISTED
Paramount Global Class B
PARA
| $5.29M | 0.01% |
116,984
-480,842
| -80% | -$19.9M |
|
|
AXON
1135
PUT
Axon Enterprise
AXON
$40.6B
| $5.29M | 0.01% |
29,900
+29,565
| +8,825% | +$4.35M |
|
|
LAZR
1136
PUT
DELISTED
Luminar Technologies
LAZR
| $5.28M | 0.01% |
16,047
+15,890
| +10,121% | +$5.24M |
|
1137
PUT
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$264M
| $5.27M | 0.01% |
53,500
+53,148
| +15,099% | +$3.2M |
|
1138
PUT
Agnico Eagle Mines
AEM
$72.8B
| $5.27M | 0.01% |
+87,200
| New | +$5.82M |
|
1139
PUT
Schrodinger
SDGR
$1.13B
| $5.27M | 0.01% |
69,700
+69,453
| +28,119% | +$5.03M |
|
1140
CALL
KB Home
KBH
$3.48B
| $5.26M | 0.01% |
129,300
+128,752
| +23,495% | +$5.94M |
|
1141
CALL
3D Systems Corp
DDD
$421M
| $5.26M | 0.01% |
131,700
+129,448
| +5,748% | +$3.42M |
|
1142
PUT
Novartis
NVS
$294B
| $5.26M | 0.01% |
57,700
+56,957
| +7,666% | +$5.07M |
|
1143
PUT
BJs Wholesale Club
BJ
$11.8B
| $5.26M | 0.01% |
110,600
+109,452
| +9,534% | +$5.01M |
|
1144
CALL
Appian
APPN
$1.71B
| $5.25M | 0.01% |
38,100
+37,912
| +20,166% | +$4.31M |
|
1145
CALL
Builders FirstSource
BLDR
$7.83B
| $5.25M | 0.01% |
123,000
+122,522
| +25,632% | +$5.68M |
|
1146
Ford
F
$57.2B
| $5.25M | 0.01% |
353,138
-197,166
| -36% | -$2.62M |
|
1147
Zscaler
ZS
$23B
| $5.24M | 0.01% |
24,246
-4,780
| -16% | -$909K |
|
1148
FedEx
FDX
$75.1B
| $5.23M | 0.01% |
17,521
+10,341
| +144% | +$3.07M |
|
1149
CALL
AutoZone
AZO
$47.8B
| $5.22M | 0.01% |
3,500
+3,471
| +11,969% | +$5.03M |
|
1150
CALL
Groupon
GRPN
$998M
| $5.22M | 0.01% |
121,000
+120,466
| +22,559% | +$5.67M |
|
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.