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 | |
|---|---|---|---|---|---|---|
6651
PUT
Algonquin Power & Utilities
AQN
$4.49B
| $105K | ﹤0.01% |
7,100
+6,980
| +5,817% | +$110K |
|
6652
CALL
Ashland
ASH
$3.33B
| $105K | ﹤0.01% |
1,200
+1,123
| +1,458% | +$101K |
|
6653
Brunswick
BC
$5.13B
| $105K | ﹤0.01% |
1,063
+189
| +22% | +$19.2K |
|
6654
Cytosorbents Corp
CTSO
$22.7M
| $105K | ﹤0.01% |
+13,951
| New | +$118K |
|
6655
PUT
First American
FAF
$7.66B
| $105K | ﹤0.01% |
1,700
+1,669
| +5,384% | +$106K |
|
6656
CALL
Imunon
IMNN
$6.68M
| $105K | ﹤0.01% |
424
+421
| +14,033% | +$99.5K |
|
6657
PUT
Medpace
MEDP
$16.1B
| $105K | ﹤0.01% |
600
+594
| +9,900% | +$103K |
|
|
NVVE
6658
PUT
DELISTED
Nuvve Holding Corp
NVVE
| – | – |
0
| – | – |
|
6659
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$1.93B
| $105K | ﹤0.01% |
+1
| New | +$178K |
|
|
AEL
6660
DELISTED
American Equity Investment Life Holding Company
AEL
| $105K | ﹤0.01% |
3,277
-176
| -5% | -$5.56K |
|
|
IGAC
6661
DELISTED
IG Acquisition Corp. Class A Common Stock
IGAC
| $105K | ﹤0.01% |
10,785
-56,108
| -84% | -$551K |
|
|
VOLT
6662
PUT
DELISTED
Volt Information Sciences, Inc.
VOLT
| $105K | ﹤0.01% |
23,100
+23,054
| +50,117% | +$92.3K |
|
|
ACRE
6663
PUT
Ares Commercial Real Estate
ACRE
$236M
| $104K | ﹤0.01% |
7,100
+7,032
| +10,341% | +$105K |
|
|
FABC
6664
Fabric.AI Inc
FABC
$16.6M
| $104K | ﹤0.01% |
167
+140
| +519% | +$92.3K |
|
6665
PUT
Bath & Body Works
BBWI
$4.06B
| $104K | ﹤0.01% |
+110,093
| New | +$5.95M |
|
6666
BorgWarner
BWA
$13.1B
| $104K | ﹤0.01% |
+2,442
| New | +$108K |
|
6667
CALL
CrossAmerica Partners
CAPL
$847M
| $104K | ﹤0.01% |
5,500
+5,406
| +5,751% | +$106K |
|
6668
CALL
Dyadic International
DYAI
$38.3M
| $104K | ﹤0.01% |
29,100
+28,921
| +16,157% | +$121K |
|
6669
CALL
Evogene
EVGN
$5.7M
| $104K | ﹤0.01% |
3,060
+3,046
| +21,757% | +$119K |
|
|
NAK
6670
PUT
Northern Dynasty Minerals
NAK
$784M
| $104K | ﹤0.01% |
+211,600
| New | +$119K |
|
6671
CALL
National Fuel Gas
NFG
$7.82B
| $104K | ﹤0.01% |
2,000
+1,911
| +2,147% | +$99.1K |
|
6672
PUT
PAVmed
PAVM
$35.4M
| $104K | ﹤0.01% |
+36
| New | +$85K |
|
6673
QuinStreet
QNST
$890M
| $104K | ﹤0.01% |
5,621
+4,401
| +361% | +$83.5K |
|
6674
CALL
Regenxbio
RGNX
$620M
| $104K | ﹤0.01% |
2,700
+2,694
| +44,900% | +$96.4K |
|
6675
SandRidge Energy
SD
$514M
| $104K | ﹤0.01% |
16,585
+5,950
| +56% | +$29.9K |
|
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.