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 | |
|---|---|---|---|---|---|---|
4076
Eldorado Gold
EGO
$8.4B
| $527K | ﹤0.01% |
52,968
+9,725
| +22% | +$108K |
|
4077
ICICI Bank
IBN
$109B
| $527K | ﹤0.01% |
30,855
-6,154
| -17% | -$102K |
|
4078
PUT
Jones Lang LaSalle
JLL
$15.9B
| $527K | ﹤0.01% |
2,700
+2,676
| +11,150% | +$523K |
|
4079
CALL
Yelp
YELP
$1.51B
| $527K | ﹤0.01% |
+13,200
| New | +$524K |
|
|
LVOX
4080
DELISTED
LiveVox Holding, Inc. Class A Common Stock
LVOX
| $527K | ﹤0.01% |
+63,210
| New | +$624K |
|
4081
ProShares Short QQQ
PSQ
$840M
| $526K | ﹤0.01% |
8,494
-4,600
| -35% | -$302K |
|
|
SOL
4082
DELISTED
Emeren Group
SOL
| $526K | ﹤0.01% |
57,847
-11,903
| -17% | -$106K |
|
|
SCPX
4083
CALL
DELISTED
Scorpius Holdings, Inc.
SCPX
| $526K | ﹤0.01% |
+20
| New | +$544K |
|
4084
CALL
Clearway Energy Class C
CWEN
$4.9B
| $525K | ﹤0.01% |
19,900
+19,566
| +5,858% | +$537K |
|
|
UNIT
4085
CALL
Uniti Group
UNIT
$2.53B
| $525K | ﹤0.01% |
49,600
+49,402
| +24,951% | +$536K |
|
|
CBD
4086
CALL
DELISTED
Companhia Brasileira de Distribuicao
CBD
| $525K | ﹤0.01% |
67,400
+66,934
| +14,364% | +$479K |
|
|
CADE
4087
PUT
DELISTED
Cadence Bank
CADE
| $524K | ﹤0.01% |
18,500
+18,499
| +1,849,900% | +$561K |
|
4088
Ecovyst
ECVT
$1.35B
| $524K | ﹤0.01% |
34,117
+34,098
| +179,463% | +$539K |
|
4089
Xerox
XRX
$360M
| $524K | ﹤0.01% |
+22,317
| New | +$540K |
|
4090
PUT
ArcBest
ARCB
$3.33B
| $523K | ﹤0.01% |
9,000
+8,993
| +128,471% | +$644K |
|
4091
PUT
Qualys
QLYS
$4.78B
| $523K | ﹤0.01% |
5,200
+5,125
| +6,833% | +$522K |
|
4092
CALL
WEX
WEX
$6.23B
| $523K | ﹤0.01% |
2,700
+2,665
| +7,614% | +$546K |
|
|
HYRE
4093
PUT
DELISTED
HyreCar Inc. Common Stock
HYRE
| $523K | ﹤0.01% |
25,000
+24,558
| +5,556% | +$377K |
|
4094
iShares National Muni Bond ETF
MUB
$45.3B
| $522K | ﹤0.01% |
+4,460
| New | +$521K |
|
|
PPL
4095
PPL Corp
PPL
$27.3B
| $522K | ﹤0.01% |
+18,665
| New | +$539K |
|
4096
CALL
Verra Mobility
VRRM
$635M
| $522K | ﹤0.01% |
34,000
+33,742
| +13,078% | +$490K |
|
|
ADN
4097
CALL
DELISTED
Advent Technologies
ADN
| $521K | ﹤0.01% |
1,803
+1,788
| +11,920% | +$594K |
|
4098
CALL
ProShares UltraShort Industrials
SIJ
$5.73M
| $521K | ﹤0.01% |
6,450
+6,404
| +13,922% | +$383K |
|
4099
CALL
Trex
TREX
$4.57B
| $521K | ﹤0.01% |
5,100
+4,992
| +4,622% | +$504K |
|
4100
Vishay Intertechnology
VSH
$5.02B
| $521K | ﹤0.01% |
23,133
-46,166
| -67% | -$1.11M |
|
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.