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 | |
|---|---|---|---|---|---|---|
926
CALL
Bausch Health
BHC
$1.66B
| $6.97M | 0.01% |
+237,600
| New | +$7.2M |
|
927
CALL
Truist Financial
TFC
$62.5B
| $6.96M | 0.01% |
125,502
+123,652
| +6,684% | +$7.26M |
|
|
UCD
928
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $6.94M | 0.01% |
139,700
+123,145
| +744% | +$6.12M |
|
929
PUT
Match Group
MTCH
$8.72B
| $6.93M | 0.01% |
+43,000
| New | +$6.3M |
|
930
PUT
Clean Energy Fuels
CLNE
$460M
| $6.93M | 0.01% |
+682,600
| New | +$7.04M |
|
|
GTM
931
PUT
ZoomInfo Technologies
GTM
$849M
| $6.93M | 0.01% |
132,800
+132,039
| +17,351% | +$6.21M |
|
932
ConocoPhillips
COP
$146B
| $6.92M | 0.01% |
113,645
-8,036
| -7% | -$448K |
|
933
PUT
EOG Resources
EOG
$77.5B
| $6.92M | 0.01% |
82,900
+81,426
| +5,524% | +$6.44M |
|
934
CALL
NCR Voyix
VYX
$1.05B
| $6.91M | 0.01% |
247,108
+244,916
| +11,173% | +$6.78M |
|
935
PUT
Prologis
PLD
$135B
| $6.91M | 0.01% |
57,800
+57,494
| +18,789% | +$6.72M |
|
936
Coca-Cola
KO
$349B
| $6.91M | 0.01% |
127,631
+67,481
| +112% | +$3.67M |
|
937
FuboTV Inc
FUBO
$254M
| $6.9M | 0.01% |
17,903
+4,596
| +35% | +$1.31M |
|
938
Las Vegas Sands
LVS
$30.5B
| $6.86M | 0.01% |
130,257
-29,901
| -19% | -$1.73M |
|
939
CALL
UWM Holdings
UWMC
$590M
| $6.86M | 0.01% |
811,400
+807,002
| +18,349% | +$6.76M |
|
940
CALL
Danaher
DHR
$135B
| $6.84M | 0.01% |
28,764
+28,523
| +11,835% | +$6.32M |
|
941
CALL
Asana
ASAN
$1.51B
| $6.83M | 0.01% |
110,200
+109,823
| +29,131% | +$4.24M |
|
942
CALL
Stellantis
STLA
$16.7B
| $6.81M | 0.01% |
345,500
+342,408
| +11,074% | +$6.44M |
|
|
KL
943
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $6.79M | 0.01% |
176,300
+175,366
| +18,776% | +$7.03M |
|
944
Visa
V
$669B
| $6.78M | 0.01% |
29,015
+24,515
| +545% | +$5.6M |
|
945
SoFi Technologies
SOFI
$21.4B
| $6.78M | 0.01% |
353,884
+344,614
| +3,718% | +$6.39M |
|
946
CALL
Trimble
TRMB
$11.7B
| $6.78M | 0.01% |
82,800
+82,418
| +21,575% | +$6.55M |
|
947
PUT
Dave & Buster's
PLAY
$339M
| $6.75M | 0.01% |
166,400
+163,816
| +6,340% | +$7.09M |
|
948
CALL
GSK
GSK
$102B
| $6.75M | 0.01% |
135,680
+134,507
| +11,467% | +$6.46M |
|
|
FIRY
949
PUT
Firy Inc
FIRY
$126M
| $6.75M | 0.01% |
15,530
+15,384
| +10,537% | +$5.49M |
|
950
PUT
Nexstar Media Group
NXST
$5.53B
| $6.74M | 0.01% |
45,600
+45,271
| +13,760% | +$6.73M |
|
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.