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 | |
|---|---|---|---|---|---|---|
2076
Pfizer
PFE
$140B
| $2.13M | ﹤0.01% |
54,346
-410,282
| -88% | -$16M |
|
|
KC
2077
PUT
Kingsoft Cloud Holdings
KC
$2.84B
| $2.13M | ﹤0.01% |
62,700
+62,253
| +13,927% | +$2.49M |
|
|
SRG
2078
CALL
Seritage Growth Properties
SRG
$130M
| $2.13M | ﹤0.01% |
115,600
+114,491
| +10,324% | +$2.03M |
|
2079
Teradyne
TER
$54.8B
| $2.13M | ﹤0.01% |
15,883
+12,244
| +336% | +$1.57M |
|
2080
PUT
Cincinnati Financial
CINF
$28.3B
| $2.12M | ﹤0.01% |
18,200
+18,072
| +14,119% | +$2.09M |
|
2081
CALL
Ambarella
AMBA
$2.99B
| $2.12M | ﹤0.01% |
19,900
+19,759
| +14,013% | +$1.96M |
|
|
FITB
2082
Fifth Third Bancorp
FITB
$52B
| $2.12M | ﹤0.01% |
55,501
+3,872
| +7% | +$155K |
|
|
ACB
2083
CALL
Aurora Cannabis
ACB
$165M
| $2.12M | ﹤0.01% |
23,435
+22,483
| +2,362% | +$1.95M |
|
2084
Direxion Daily Financial Bull 3x ETF
FAS
$2.4B
| $2.12M | ﹤0.01% |
19,362
-16,607
| -46% | -$1.83M |
|
2085
CALL
Ingles Markets
IMKTA
$1.63B
| $2.12M | ﹤0.01% |
36,300
+36,171
| +28,040% | +$2.24M |
|
2086
CALL
Omeros
OMER
$709M
| $2.11M | ﹤0.01% |
142,400
+141,953
| +31,757% | +$2.38M |
|
|
LPRO
2087
CALL
Open Lending Corp
LPRO
$373M
| $2.11M | ﹤0.01% |
49,000
+48,728
| +17,915% | +$1.87M |
|
|
XLNX
2088
CALL
DELISTED
Xilinx Inc
XLNX
| $2.11M | ﹤0.01% |
+14,600
| New | +$1.86M |
|
2089
CALL
News Corp Class B
NWS
$16.4B
| $2.11M | ﹤0.01% |
86,500
+86,177
| +26,680% | +$2.13M |
|
2090
PUT
Navios Maritime Partners
NMM
$2.25B
| $2.11M | ﹤0.01% |
71,300
+70,825
| +14,911% | +$2.05M |
|
2091
Carvana
CVNA
$43.3B
| $2.1M | ﹤0.01% |
34,875
-56,645
| -62% | -$3.08M |
|
|
FINV
2092
PUT
FinVolution Group
FINV
$1.12B
| $2.1M | ﹤0.01% |
220,800
+218,744
| +10,639% | +$1.66M |
|
|
MGI
2093
PUT
DELISTED
MoneyGram International, Inc. New
MGI
| $2.1M | ﹤0.01% |
208,400
+207,507
| +23,237% | +$1.75M |
|
|
GOEV
2094
CALL
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $2.1M | ﹤0.01% |
459
+453
| +7,550% | +$1.83M |
|
|
LUXA
2095
CALL
DELISTED
Lux Health Tech Acquisition Corp. Class A Common Stock
LUXA
| $2.09M | ﹤0.01% |
211,500
+211,494
| +3,524,900% | +$2.13M |
|
|
BNY
2096
Bank of New York Mellon
BNY
$108B
| $2.09M | ﹤0.01% |
40,812
+28,658
| +236% | +$1.43M |
|
|
AYX
2097
PUT
DELISTED
Alteryx Inc
AYX
| $2.09M | ﹤0.01% |
24,300
+23,708
| +4,005% | +$1.94M |
|
2098
PUT
Bionano Genomics
BNGO
$12.7M
| $2.09M | ﹤0.01% |
475
+469
| +7,817% | +$1.85M |
|
|
AHT
2099
PUT
Ashford Hospitality Trust
AHT
$21M
| $2.09M | ﹤0.01% |
+4,576
| New | +$1.66M |
|
2100
CALL
Idexx Laboratories
IDXX
$42.9B
| $2.08M | ﹤0.01% |
3,300
+3,270
| +10,900% | +$1.81M |
|
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.