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 | |
|---|---|---|---|---|---|---|
2101
CALL
The Beachbody Company
BODI
$78.9M
| $2.08M | ﹤0.01% |
4,008
+3,941
| +5,882% | +$2M |
|
|
PING
2102
PUT
DELISTED
Ping Identity Holding Corp.
PING
| $2.08M | ﹤0.01% |
90,800
+89,689
| +8,073% | +$2.11M |
|
2103
CALL
Kinross Gold
KGC
$28.5B
| $2.08M | ﹤0.01% |
+327,100
| New | +$2.43M |
|
2104
Enphase Energy
ENPH
$4.84B
| $2.08M | ﹤0.01% |
11,307
-25,132
| -69% | -$3.69M |
|
2105
Clover Health Investments
CLOV
$2.28B
| $2.08M | ﹤0.01% |
155,798
+115,414
| +286% | +$1.13M |
|
|
GTM
2106
CALL
ZoomInfo Technologies
GTM
$861M
| $2.07M | ﹤0.01% |
39,700
+39,404
| +13,312% | +$1.85M |
|
2107
Suncor Energy
SU
$77.7B
| $2.07M | ﹤0.01% |
86,298
-7,782
| -8% | -$179K |
|
2108
PUT
Butterfly Network
BFLY
$1.72B
| $2.07M | ﹤0.01% |
142,700
+142,284
| +34,203% | +$1.92M |
|
2109
CALL
Vuzix
VUZI
$190M
| $2.07M | ﹤0.01% |
112,600
+110,895
| +6,504% | +$2.24M |
|
2110
PUT
Ameriprise Financial
AMP
$46.8B
| $2.06M | ﹤0.01% |
8,300
+8,196
| +7,881% | +$2.07M |
|
2111
PUT
Raymond James Financial
RJF
$32.5B
| $2.06M | ﹤0.01% |
23,850
+23,794
| +42,489% | +$2.07M |
|
|
FITB
2112
PUT
Fifth Third Bancorp
FITB
$52B
| $2.06M | ﹤0.01% |
54,000
+52,465
| +3,418% | +$2.1M |
|
2113
Halliburton
HAL
$27.9B
| $2.06M | ﹤0.01% |
89,283
-2,241
| -2% | -$49.8K |
|
2114
CALL
Starwood Property Trust
STWD
$6.12B
| $2.06M | ﹤0.01% |
78,800
+77,663
| +6,831% | +$1.98M |
|
2115
Under Armour
UAA
$3B
| $2.06M | ﹤0.01% |
+97,511
| New | +$2.17M |
|
|
TRTX
2116
CALL
TPG RE Finance Trust
TRTX
$666M
| $2.06M | ﹤0.01% |
153,100
+153,030
| +218,614% | +$1.96M |
|
2117
PUT
United Microelectronic
UMC
$48.9B
| $2.06M | ﹤0.01% |
217,900
+216,065
| +11,775% | +$2.02M |
|
2118
PUT
Star Bulk Carriers
SBLK
$3.14B
| $2.06M | ﹤0.01% |
89,600
+89,413
| +47,814% | +$1.77M |
|
|
SF
2119
CALL
Stifel
SF
$12.3B
| $2.06M | ﹤0.01% |
47,550
+46,957
| +7,919% | +$2.11M |
|
2120
CALL
Sun Life Financial
SLF
$45.6B
| $2.06M | ﹤0.01% |
39,900
+39,263
| +6,164% | +$2.07M |
|
|
CMA
2121
PUT
DELISTED
Comerica
CMA
| $2.05M | ﹤0.01% |
28,800
+28,404
| +7,173% | +$2.11M |
|
2122
PUT
Nano X Imaging
NNOX
$62.4M
| $2.05M | ﹤0.01% |
64,100
+63,215
| +7,143% | +$1.92M |
|
|
CERE
2123
CALL
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $2.05M | ﹤0.01% |
+80,200
| New | +$1.15M |
|
2124
CALL
F5
FFIV
$22.1B
| $2.05M | ﹤0.01% |
11,000
+10,859
| +7,701% | +$2.09M |
|
2125
PUT
Petco
WOOF
$745M
| $2.05M | ﹤0.01% |
91,600
+91,272
| +27,827% | +$2.13M |
|
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.