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 | |
|---|---|---|---|---|---|---|
|
VEDL
5201
DELISTED
Vedanta Limited American Depostary Shares (Each representing four equity shares)
VEDL
| $262K | ﹤0.01% |
18,518
-106,764
| -85% | -$1.5M |
|
5202
CALL
American Financial Group
AFG
$11.8B
| $261K | ﹤0.01% |
2,100
+2,084
| +13,025% | +$260K |
|
5203
PUT
BWX Technologies
BWXT
$15.2B
| $261K | ﹤0.01% |
4,500
+4,428
| +6,150% | +$285K |
|
5204
CALL
POSCO
PKX
$16.5B
| $261K | ﹤0.01% |
3,400
+3,396
| +84,900% | +$269K |
|
5205
Ring Energy
REI
$315M
| $261K | ﹤0.01% |
87,836
+38,931
| +80% | +$93.7K |
|
5206
CALL
SI-BONE Inc
SIBN
$798M
| $261K | ﹤0.01% |
8,300
+8,119
| +4,486% | +$263K |
|
|
CONX
5207
CALL
DELISTED
CONX Corp. Class A Common Stock
CONX
| $261K | ﹤0.01% |
26,500
+26,413
| +30,360% | +$262K |
|
|
ZYNE
5208
CALL
DELISTED
Zynerba Pharmaceuticals, Inc
ZYNE
| $261K | ﹤0.01% |
+49,500
| New | +$238K |
|
|
PDAC
5209
DELISTED
Peridot Acquisition Corp.
PDAC
| $261K | ﹤0.01% |
+21,491
| New | +$231K |
|
5210
PUT
Beam Global
BEEM
$23.1M
| $260K | ﹤0.01% |
6,800
+6,710
| +7,456% | +$221K |
|
5211
Global X Cybersecurity ETF
BUG
$1.26B
| $260K | ﹤0.01% |
9,039
+9,003
| +25,008% | +$245K |
|
5212
PUT
Carlyle Group
CG
$16.3B
| $260K | ﹤0.01% |
5,600
+5,563
| +15,035% | +$237K |
|
5213
CALL
Freedom Holding
FRHC
$9.88B
| $260K | ﹤0.01% |
+4,000
| New | +$212K |
|
5214
PUT
Greif
GEF
$4.96B
| $260K | ﹤0.01% |
4,300
+4,188
| +3,739% | +$256K |
|
5215
CALL
The Joint Corp
JYNT
$119M
| $260K | ﹤0.01% |
+3,100
| New | +$192K |
|
5216
CALL
Liberty Latin America Class C
LILAK
$1.61B
| $260K | ﹤0.01% |
20,570
+20,245
| +6,229% | +$260K |
|
|
PCH
5217
CALL
DELISTED
PotlatchDeltic
PCH
| $260K | ﹤0.01% |
4,900
+4,871
| +16,797% | +$281K |
|
|
OLOX
5218
CALL
Olenox Industries
OLOX
$6.68M
| $260K | ﹤0.01% |
+8
| New | +$190K |
|
5219
CALL
Walker & Dunlop
WD
$1.68B
| $260K | ﹤0.01% |
2,500
+2,464
| +6,844% | +$258K |
|
|
LVOX
5220
PUT
DELISTED
LiveVox Holding, Inc. Class A Common Stock
LVOX
| $260K | ﹤0.01% |
31,200
+30,541
| +4,634% | +$302K |
|
5221
PUT
Cerus
CERS
$579M
| $259K | ﹤0.01% |
43,900
+43,759
| +31,035% | +$257K |
|
5222
CALL
Enterprise Financial Services Corp
EFSC
$2.39B
| $259K | ﹤0.01% |
5,600
+5,594
| +93,233% | +$274K |
|
5223
PUT
First Bancorp
FBP
$4.4B
| $259K | ﹤0.01% |
21,800
+21,221
| +3,665% | +$261K |
|
5224
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $259K | ﹤0.01% |
4,800
+4,632
| +2,757% | +$165K |
|
5225
Philip Morris
PM
$299B
| $259K | ﹤0.01% |
2,619
-64
| -2% | -$6.14K |
|
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.