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 | |
|---|---|---|---|---|---|---|
4576
PUT
Herc Holdings
HRI
$4.78B
| $381K | ﹤0.01% |
3,400
+3,310
| +3,678% | +$350K |
|
4577
PUT
National Fuel Gas
NFG
$7.69B
| $381K | ﹤0.01% |
7,300
+7,221
| +9,141% | +$375K |
|
4578
PUT
Teucrium Soybean Fund
SOYB
$61.1M
| $381K | ﹤0.01% |
29,900
+29,785
| +25,900% | +$682K |
|
4579
CALL
Transmedics
TMDX
$2.7B
| $381K | ﹤0.01% |
11,500
+11,370
| +8,746% | +$315K |
|
4580
PUT
Telus
TU
$17.4B
| $381K | ﹤0.01% |
17,000
+16,893
| +15,788% | +$366K |
|
|
NBRV
4581
CALL
DELISTED
Nabriva Therapeutics plc Ordinary Shares Ireland
NBRV
| $381K | ﹤0.01% |
11,308
+11,218
| +12,464% | +$418K |
|
4582
AES
AES
$10.6B
| $380K | ﹤0.01% |
+14,588
| New | +$385K |
|
4583
PUT
Lazard
LAZ
$3.96B
| $380K | ﹤0.01% |
8,400
+8,181
| +3,736% | +$375K |
|
4584
CALL
Ardmore Shipping
ASC
$683M
| $379K | ﹤0.01% |
89,900
+89,145
| +11,807% | +$381K |
|
4585
Evolent Health
EVH
$371M
| $379K | ﹤0.01% |
17,976
+5,622
| +46% | +$113K |
|
4586
CALL
Blue Owl Capital
OBDC
$5.35B
| $379K | ﹤0.01% |
26,600
+26,251
| +7,522% | +$377K |
|
4587
PUT
Patrick Industries
PATK
$2.87B
| $379K | ﹤0.01% |
+7,800
| New | +$446K |
|
|
HTT
4588
PUT
High Templar Tech Ltd
HTT
$370M
| $379K | ﹤0.01% |
157,600
+155,499
| +7,401% | +$333K |
|
4589
Invesco DB US Dollar Index Bullish Fund
UUP
$423M
| $379K | ﹤0.01% |
+15,289
| New | +$374K |
|
|
ETRN
4590
CALL
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $379K | ﹤0.01% |
44,600
+44,367
| +19,042% | +$376K |
|
|
DISCK
4591
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $379K | ﹤0.01% |
13,082
-22,856
| -64% | -$710K |
|
4592
AllianceBernstein
AB
$3.47B
| $378K | ﹤0.01% |
8,119
+7,397
| +1,025% | +$322K |
|
|
GAN
4593
PUT
DELISTED
GAN Ltd
GAN
| $378K | ﹤0.01% |
23,000
+22,711
| +7,858% | +$400K |
|
|
THS
4594
PUT
DELISTED
Treehouse Foods
THS
| $378K | ﹤0.01% |
8,500
+8,461
| +21,695% | +$417K |
|
|
BBIG
4595
PUT
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $378K | ﹤0.01% |
7,049
+7,027
| +31,941% | +$302K |
|
|
PLYA
4596
DELISTED
Playa Hotels & Resorts
PLYA
| $377K | ﹤0.01% |
50,802
+36,163
| +247% | +$267K |
|
4597
VanEck Low Carbon Energy ETF
SMOG
$125M
| $377K | ﹤0.01% |
2,342
-530
| -18% | -$80.2K |
|
|
FLY
4598
CALL
DELISTED
Fly Leasing Limited
FLY
| $377K | ﹤0.01% |
22,300
+22,002
| +7,383% | +$372K |
|
4599
PUT
Atkore
ATKR
$2.41B
| $376K | ﹤0.01% |
5,300
+5,286
| +37,757% | +$402K |
|
|
DAO
4600
PUT
Youdao
DAO
$1.89B
| $376K | ﹤0.01% |
16,300
+15,992
| +5,192% | +$387K |
|
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.