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 | |
|---|---|---|---|---|---|---|
1076
CALL
First Trust Natural Gas ETF
FCG
$636M
| $5.66M | 0.01% |
75,600
+75,293
| +24,525% | +$1.08M |
|
1077
CALL
PPG Industries
PPG
$25.9B
| $5.65M | 0.01% |
33,300
+33,070
| +14,378% | +$5.67M |
|
1078
CALL
Ocugen
OCGN
$420M
| $5.65M | 0.01% |
703,900
+698,912
| +14,012% | +$5.9M |
|
1079
PUT
Coherent
COHR
$56.1B
| $5.65M | 0.01% |
77,800
+76,966
| +9,229% | +$5.42M |
|
1080
CALL
Live Nation Entertainment
LYV
$41.3B
| $5.64M | 0.01% |
+64,400
| New | +$5.52M |
|
1081
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $5.63M | 0.01% |
227,100
+223,443
| +6,110% | +$5.47M |
|
1082
CALL
Elastic
ESTC
$6.07B
| $5.63M | 0.01% |
38,600
+38,492
| +35,641% | +$4.81M |
|
1083
NRG Energy
NRG
$30.1B
| $5.63M | 0.01% |
+139,601
| New | +$5.06M |
|
1084
PUT
Enterprise Products Partners
EPD
$83.9B
| $5.61M | 0.01% |
+232,600
| New | +$5.51M |
|
1085
PUT
Ally Financial
ALLY
$13.4B
| $5.6M | 0.01% |
112,400
+111,214
| +9,377% | +$5.71M |
|
1086
PUT
Global Payments
GPN
$22B
| $5.59M | 0.01% |
29,800
+29,436
| +8,087% | +$5.92M |
|
1087
CALL
UiPath
PATH
$5.55B
| $5.58M | 0.01% |
+82,100
| New | +$6.02M |
|
1088
Atlassian
TEAM
$21.6B
| $5.58M | 0.01% |
21,709
+8,541
| +65% | +$2M |
|
|
CGC
1089
CALL
Canopy Growth
CGC
$376M
| $5.58M | 0.01% |
23,060
+22,857
| +11,260% | +$5.85M |
|
1090
PUT
Viasat
VSAT
$9.89B
| $5.57M | 0.01% |
+111,800
| New | +$5.55M |
|
1091
PUT
Revolve Group
RVLV
$1.78B
| $5.56M | 0.01% |
80,700
+80,545
| +51,965% | +$4.33M |
|
1092
PUT
Westlake Corp
WLK
$9.51B
| $5.55M | 0.01% |
61,600
+61,571
| +212,314% | +$5.98M |
|
1093
CALL
Corsair Gaming
CRSR
$1.06B
| $5.53M | 0.01% |
166,200
+164,414
| +9,206% | +$5.41M |
|
1094
CALL
Oneok
OKE
$59.1B
| $5.53M | 0.01% |
99,300
+98,215
| +9,052% | +$5.23M |
|
1095
CALL
Microchip Technology
MCHP
$43.1B
| $5.51M | 0.01% |
+73,600
| New | +$5.61M |
|
|
CALY
1096
CALL
Callaway Golf Company
CALY
$3.24B
| $5.5M | 0.01% |
163,200
+161,532
| +9,684% | +$5.19M |
|
1097
PUT
Teva Pharmaceuticals
TEVA
$36B
| $5.5M | 0.01% |
555,800
+550,620
| +10,630% | +$5.83M |
|
1098
PUT
Danaher
DHR
$135B
| $5.5M | 0.01% |
23,124
+22,934
| +12,071% | +$5.09M |
|
1099
PUT
Rapid7
RPD
$638M
| $5.5M | 0.01% |
58,100
+57,897
| +28,521% | +$4.88M |
|
|
BTWN
1100
CALL
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $5.49M | 0.01% |
542,500
+538,115
| +12,272% | +$5.58M |
|
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.